Aikyam-Lab/Synoptic-Bench huggingface dataset:
419 AM CST Sun Nov 8 2020 Water vapor satellite imagery very early this morning depicts an amplified meridional upper level flow over the country with a large trough in place over the western half of the CONUS and a ridge over the east/northeast.
Will upgrade the high wind watch to a high wind warning. On Monday, a cold front will move through the forecast area.
Below average temperatures expected to continue through the week, with near freezing Valley temperatures expected Monday morning. Minimal changes to the forecast this morning as the broad upper level low spins over the West. Satellite imagery shows some convective clouds along the west slope of the Sierra, with isolated thunderstorms occurring in the lower elevations of the foothills and heavy snow happening in the higher terrain. Expect these conditions to continue through the mid morning hours, with snow and rain shower chances tapering this afternoon and evening as the trough exits the region. Temperatures should remain a touch warmer there, while areas not affected by the wind fall. Monday morning lows are forecast to be in the 20s and 30s for the foothills while the high elevations vary from the teens to the 20s.
351 AM CST Sun Nov 8 2020 Warmer than average will exist across the region today as a semitropical airmass remains over the region. Surface flow around the high will help to advect moisture into the region in the lower levels from the south. A highly amplified pattern will exist across the CONUS in the upper levels placing the ArkLaMiss in between a steep ridging over the east coast and increasing troughiness over the over the western two thirds of the country. Highs today will climb to near 80 degrees, about 1o degrees warmer than average. A few light showers will be possible along and west of the MS River today as a weakening upper level disturbances lifts from south to north, eventually merging with NW flow around the ridge.
Warmer than average will exist across the region today as a semitropical airmass remains over the region. Surface flow around the high will help to advect moisture into the region in the lower levels from the south. A highly amplified pattern will exist across the CONUS in the upper levels placing the ArkLaMiss in between a steep ridging over the east coast and increasing troughiness over the over the western two thirds of the country. Highs today will climb to near 80 degrees, about 10 degrees warmer than average. A few light showers will be possible along and west of the MS River today as a weakening upper level disturbances lifts from south to north, eventually merging with NW flow around the ridge.
Time-height cross sections show moisture will be confined to the lowest levels and there is no significant forcing to create sufficient lift for much precipitation, although some drizzle can't be ruled out with the low-level moisture advection.
713 AM EST Sun Nov 8 2020 High pressure at the surface and aloft overhead will supply abundant sunshine and near-record daytime temperatures.
Tonight into Monday, a larger-scale upper trough will migrate across the West and cross the Rockies. Stubborn surface ridging over the east will support continued moist southeasterly low- level flow locally, but a lack of impulses in the flow aloft or other focusing mechanisms suggests the remainder of this period will be dry.
344 AM CST Sun Nov 8 2020 Southwest flow aloft continues today as a deep trough to our west digs over southern CA. This morning, as the trough digs, surface gradients will tighten as heights fall.
Mostly sunny to partly cloudy, cooler and not as windy today as the area is in between weather systems. Highs this afternoon 5 to 13 degrees cooler than Sat.
and Monday Record warmth will continue for the second half of the weekend as upper level ridging continues across the western Great Lakes region. Dry weather is expected to continue overnight as an approaching cold front brings increased clouds to the region. The aforementioned cold front will track over northwest Wisconsin during the day on Monday, which will bring increasing chances for rain across north-central and portions of central Wisconsin as the day wears on. The clouds and expected rain should keep temperatures a few degrees cooler on Monday, with highs expected to range from the middle 60s across north-central Wisconsin with highs around 70 across east-central Wisconsin.
This is mainly associated with the mid/upper level trough that is expected to slowly move east, but will continue the higher chances of showers and perhaps a few thunderstorms into the afternoon hours. The mid/upper low is expected to slowly fill and drift eastward later today into the early part of this week with minimal precipitation chances as drier air aloft becomes dominate once again.
Already, radar and observations show wintry mix transitioning to snow in western areas, precipitation approaching the southern zones, and drizzle and freezing drizzle to the northeast. As the morning progresses, steadier precipitation will shift northeast, with several hours of freezing rain possible for some locations. To the southeast across Petroleum, Garfield, and Valley, and McCone Counties, in addition to freezing rain and icing concerns, several inches of snow will likely stack up with significant blowing and drifting expected.
Winds will be breezy again this afternoon along the coast and across interior ridges. Gusts to 25 mph or so will be possible along the coast and some higher gusts across inland ridgetops. Widespread 20s and 30s are expected across interior areas and most coastal areas will dip into the low to mid 30s.
445 AM EST Sun Nov 8 2020 High pressure at the surface and aloft overhead will supply abundant sunshine and near-record daytime temperatures.
Water vapor satellite imagery very early this morning depicts an amplified meridional upper level flow over the country with a large trough in place over the western half of the CONUS and a ridge over the east/northeast.
By Monday afternoon, Middle TN will be between three distinct features: a longwave trough/cold front over the Plains, high pressure along the East Coast, and a tropical system (Eta) in the eastern Gulf of Mexico.
The snow ends on Monday morning, with lighter winds and a bit warmer temperatures.
404 AM CST Sun Nov 8 2020 The current synoptic pattern across the CONUS is defined by a large, high amplitude mid level trough across the western CONUS with an area of mid level high pressure centered over the Mid Atlantic. The large upper level trough will continue its eastward progression into Monday, with an accompanying cold front approaching far NW Missouri by Monday evening. Monday afternoon will be windy and warm once again in the warm sector out ahead of the approaching cold front, with highs in the mid 70s and similar winds as today.
420 AM CST Sun Nov 8 2020 A variety of weather impacts including freezing drizzle/rain, snow, thunderstorms, strong winds and fog highlight the short term. It appears all but far northwest North Dakota will rise above freezing today. Temperatures at or slightly below freezing across the northwest means light drizzle and rain will likely be freezing drizzle/rain at least through a good portion of the day. Sustained winds around 30 mph and gusts as high as 55 mph are likely with steep lapse rates, strong CAA and WAA, and impressive pressure rises behind the cold front. The longwave trough slowly moves off to the east by mid-week.
/issued 325 AM CST Sun Nov 8 2020/ SHORT TERM (Now through Monday): Deep South Texas and the Rio Grande Valley will remain under the influence of a 500 mb ridge of high pressure, whose axis will ease east from directly over the BRO CWFA to more over the northwest Gulf of Mexico.
444 AM EST Sun Nov 8 2020 High pressure at the surface and aloft overhead will supply abundant sunshine and near-record daytime temperatures.
We will remain under the ridge aloft so temperatures will be on the warm side.
High pressure still has a broad footprint covering much of the eastern CONUS today with the upper-low to our west becoming harder to discern on water vapor imagery. With high pressure to our northeast and Eta to our south, winds will favor an easterly direction and pick up in magnitude throughout today. Sustained winds ~10 mph with a few gusts to ~25 mph are forecast during the warmer daylight hours.
Low clouds are forecast to redevelop across much of the area tonight with LLWS at KBVO as the low level jet begins to increase. The lowest clouds were across far Southeast Oklahoma where dewpoints were in the lower 60s. Short term guidance tries to break out a few showers within the higher terrain of Northwest Arkansas this afternoon associated with the moisture lifting into the region. afternoon highs in the low/mid 70s are forecast with overnight lows in the upper 50s and lower 60s again. A low pressure system. currently positioned within a longwave trof over the Western CONUS this morning.
SHORT TERM (Now through Monday): Deep South Texas and the Rio Grande Valley will remain under the influence of a 500 mb ridge of high pressure, whose axis will ease east from directly over the BRO CWFA to more over the northwest Gulf of Mexico.
352 AM CST Sun Nov 8 2020 Southerly flow continues through the short term, gradually increasing ahead of a trough moving out of the western CONUS.
High pressure over the eastern states and Tropical Storm Eta over Cuba will keep a tight gradient across the waters with strong winds at advisory speeds.
/issued 344 AM CST Sun Nov 8 2020/ Southwest flow aloft continues today as a deep trough to our west digs over southern CA. This morning, as the trough digs, surface gradients will tighten as heights fall.
A deepening low pressure system will move into the Dakotas today, further tightening the pressure gradient over the region. This strong southerly flow will spoil us with another warm day, as highs this afternoon once again reach into the low to mid 70s. Southerly winds will veer to the southwest a bit as the previously mentioned low pulls a cold front through the central plains Sunday night and Monday.
The lowest clouds were across far Southeast Oklahoma where dewpoints were in the lower 60s. Short term guidance tries to break out a few showers within the higher terrain of Northwest Arkansas this afternoon associated with the moisture lifting into the region. afternoon highs in the low/mid 70s are forecast with overnight lows in the upper 50s and lower 60s again. A low pressure system. currently positioned within a longwave trof over the Western CONUS this morning.
Yesterday's ArklaTex upper trough has now progressed to the Carolina's, courtesy of the first west coast trough, which is now ejecting into the northern Rockies, leaving West Texas and Southeast New Mexico under SW flow aloft.
Today we'll see that aformentioned lull in activity before the second half of the trough system approaches our western CWA this evening/overnight. Thus, activity will pickup again this evening with precipitation rates maximized over the southern slopes early tomorrow morning before things come to a gradual end Monday night as the trough moves off the east. Temperatures this afternoon max out just below normals with lows tonight in the same boat across the lower elevations.
506 AM CST Sun Nov 8 2020 A variety of weather impacts including freezing drizzle/rain, snow, thunderstorms, strong winds and fog highlight the short term. It appears all but far northwest North Dakota will rise above freezing today. Temperatures at or slightly below freezing across the northwest means light drizzle and rain will likely be freezing drizzle/rain at least through a good portion of the day. Sustained winds around 30 mph and gusts as high as 55 mph are likely with steep lapse rates, strong CAA and WAA, and impressive pressure rises behind the cold front. The longwave trough slowly moves off to the east by mid-week.
a deep closed cut-off low will continue to dig through the inner mountain west. A weak low pressure over southern Louisiana will continue to slide southward into the Gulf eventually merging and getting absorbed with Eta. A drying trend will continue for the northmen Gulf coast as the forecast area lies along the western periphial of east coast ridge and in between Eta and western conus trough. Warm and dry conditions will persist Monday as Eta moves towards the southern Florida peninsula and high pressure remains in place along the north central Gulf states.
Significant snow accumulations over the higher terrain are forecast for tonight.
These winds will only diminish slightly throughout the day as the surface cyclone in North Dakota moves farther north. The surface cyclone will move slowly east during the day maintaining a tight surface pressure gradient over southwest Kansas, and therefore another day of strong south winds can be expected. Temperatures will warm into the low 70s before a cold front moves through our area early Monday evening.
Sky cover was increased more in line with current visible satellite, as the lower clouds continue to persist in many areas. High pressure still has a broad footprint covering much of the eastern CONUS today with the upper-low to our west becoming harder to discern on water vapor imagery. With high pressure to our northeast and Eta to our south, winds will favor an easterly direction and pick up in magnitude throughout today. Sustained winds ~10 mph with a few gusts to ~25 mph are forecast during the warmer daylight hours.
Thankfully the heaviest band has set up just offshore of the Lower and Middle Keys. Radar estimates show that 4-6 inches of rain has fallen south of the Lower Keys. Hurricane hunter aircraft found stronger winds in Eta after it emerged off the north central Cuban coast and as such, the forecast intensity for Eta as it passes the Lower Keys Monday has been upped to 65 knots or 75 mph, which brings it up to minimal hurricane strength.
High pressure is expected across the area into Monday.
212 PM CST Sun Nov 8 2020 Strong, gusty southerly winds will diminish this evening as the low responsible exits into Canada. Winds will shift to the northwest behind the low, as well. Cold air will advect in on the edges of an upper trough that is transitioning into the northern Plains tonight and Monday. Freezing rain may mix in along the western edge of the Coteau southwest into the bootheel of Lyman county on the edge of the temp gradient. High pressure builds in at the sfc Monday night. Temps plummet from highs in the lower 70s this afternoon to the 30s for highs on Monday.
1105 AM CST Sun Nov 8 2020 Satellite imagery shows mostly clear skies across most of the Mid-South with high pressure downstream. We're currently sitting in the low-to-upper 70s already and are expected to reach the upper 70s and low 80s for highs as southerly flow remains strong.
1006 AM MST Sun Nov 8 2020 Subsidence has moved in behind last night's cold front. Today we'll see that aformentioned lull in activity before the second half of the trough system approaches our western CWA this evening/overnight. Thus, activity will pickup again this evening with precipitation rates maximized over the southern slopes early tomorrow morning before things come to a gradual end Monday night as the trough moves off the east. Temperatures this afternoon max out just below normals with lows tonight in the same boat across the lower elevations.
CD Chattanooga Airport, TN 59 78 63 75 68 / 0 0 10 40 60 Knoxville McGhee Tyson Airport, TN 54 78 58 75 64 / 0 0 0 20 70 Oak Ridge, TN 55 77 57 75 63 / 0 0 0 30 70 Tri Cities Airport, TN 52 78 56 76 62 / 0 0 10 20 80.
313 PM EST Sun Nov 8 2020 A strong high pressure system will lead to a continuation of dry and unseasonably warm conditions through Monday. A cold front will move into the Ohio Valley through mid week, bringing the next chance for showers. Our area will remain on the western fringe of a strong high pressure system centered just off the mid Atlantic Coast tonight. The high pressure will continue to push slowly east Monday into Monday night with some better return flow setting up across the upper Ohio Valley. We continue to overachieve guidance with temps so will trend a little warmer and go with highs on Monday in the upper 70s to around 80 degrees.
129 PM CST Sun Nov 8 2020 Looks as though we will remain stuck in a broad swly mid/upper level flow pattern tonight through Monday night, with deep low pressure out over the Rockies and amplified ridging off the se U.
1144 AM MST Sun Nov 8 2020 Subsidence has moved in behind last night's cold front. Today we'll see that aformentioned lull in activity before the second half of the trough system approaches our western CWA this evening/overnight. Thus, activity will pickup again this evening with precipitation rates maximized over the southern slopes early tomorrow morning before things come to a gradual end Monday night as the trough moves off the east. Temperatures this afternoon max out just below normals with lows tonight in the same boat across the lower elevations.
1026 AM PST Sun Nov 8 2020 Colder air moving in will bring light snow to the lower elevations of the ID Panhandle and Palouse on Sunday morning with dry conditions by the evening hours.
There is a tongue of theta-e ridging in the 850-700mb layer near the I-49 Corridor from SW AR into Central LA today and this will continue to be a favored region of isolated to scattered showers as we go through the remainder of the day.
The influence of high pressure to the east will continue to keep the area warm and dry through the start of the work week.
347 PM EST Sun Nov 8 2020 An area of scattered clouds are streaming northward into southeast Michigan within the 825-650 mb theta-e plume this afternoon, but are having little impact on the high temperatures given the limited coverage and later arrival time. Temperatures this afternoon have already reached the low to mid 70s and broken daily high temperature records again across southeast Michigan.
357 PM EST Sun Nov 8 2020 An area of scattered clouds are streaming northward through southeast Michigan within the 825-650 mb theta-e plume this afternoon, but have had little impact on the high temperatures given the limited coverage. Temperatures this afternoon have already reached the low to mid 70s and broken daily high temperature records again across southeast Michigan.
Will maintain some semblance of clouds tonight and this combined with a continued southerly flow will make for another mild night with lows in the lower 60s. Breezy and unseasonably warm conditions will continue Monday as a cold front begins to advance across Kansas.
1201 PM EST Sun Nov 8 2020 High pressure at the surface and aloft overhead will supply abundant sunshine and near-record daytime temperatures.
This strong southerly flow supported decent WAA with afternoon highs reaching into the low/mid 70s, despite the scattered low clouds. This continued southerly flow combined with increasing low clouds ahead of the advancing system will keep low temperatures tonight in the low 60s.
Tightening pressure gradient across our area tonight and Monday as Tropical Cyclone Eta moves nw and then w across the Florida Keys into the eastern Gulf.
311 PM EST Sun Nov 8 2020 Ridging persisted at all levels over the area today, with high pressure centers to our east near the mid Atlantic coast. As time passes during the short term period, the ridging will weaken and the highs will move eastward. A large upper trough over the western CONUS will also migrate eastward, along with its cold frontal boundary, which will be in the mid Mississippi Valley by late Monday night. Winds at all levels will finally show an uptick as the ridging departs and the next system approaches, but will still be rather meager.
/issued 1105 AM CST Sun Nov 8 2020/ Satellite imagery shows mostly clear skies across most of the Mid-South with high pressure downstream. We're currently sitting in the low-to-upper 70s already and are expected to reach the upper 70s and low 80s for highs as southerly flow remains strong.
Southerly flow continues through the short term, gradually increasing ahead of a trough moving out of the western CONUS.
151 PM CST Sun Nov 8 2020 Cloud cover is working into the western portions of the region this afternoon in association with our next cold front. The warm front, that lifted northward into the region this morning, has facilitate near record high temperatures this afternoon across much of the forecast area. Southerly winds preceding the cold front will impact the Red River Valley and areas to the west with gusts up to 50 mph. Temperature gradients tonight continue to be rather sharp, with lows in the low 20s for Devils Lake and low to mid 40s in the Park Rapids area. The entire area will be in the 20s and 30s by midday, and in the lower to middle 20s by sunset.
ABM Chattanooga Airport, TN 79 59 78 63 75 / 0 0 0 10 40 Knoxville McGhee Tyson Airport, TN 77 54 78 58 75 / 0 0 0 0 20 Oak Ridge, TN 77 55 77 57 75 / 0 0 0 0 30 Tri Cities Airport, TN 76 52 78 56 76 / 0 0 0 10 20.
Windy conditions are expected through the TAF period for all terminals, with the coastal sites experiencing the highest winds and wind gusts. Tight easterly gradient between high pressure to the north and TS Eta to the south will produce frequent gusts over 34 knots in the Tropical Storm warning area from Brevard southward.
Cold front moves into NE OK late Monday night and sweeps through western AR by mid Tues afternoon.
238 PM EST Sun Nov 8 2020 High pressure at the surface and aloft overhead will supply abundant sunshine and near-record daytime temperatures.
313 PM EST Sun Nov 8 2020 Ridging persisted at all levels over the area today, with high pressure centers to our east near the mid Atlantic coast. As time passes during the short term period, the ridging will weaken and the highs will move eastward. A large upper trough over the western CONUS will also migrate eastward, along with its cold frontal boundary, which will be in the mid Mississippi Valley by late Monday night. Winds at all levels will finally show an uptick as the ridging departs and the next system approaches, but will still be rather meager.
DETERIORATING CONDITIONS WILL SPREAD ACROSS PORTIONS OF THE Troughiness aloft eases east across the nation with an accompanying cold front through the week.
1143 AM CST Sun Nov 8 2020 The current synoptic pattern across the CONUS is defined by a large, high amplitude mid level trough across the western CONUS with an area of mid level high pressure centered over the Mid Atlantic. The large upper level trough will continue its eastward progression into Monday, with an accompanying cold front approaching far NW Missouri by Monday evening. Monday afternoon will be windy and warm once again in the warm sector out ahead of the approaching cold front, with highs in the mid 70s and similar winds as today.
A highly amplified upper pattern continues over the CONUS through the near term, with a five-wave scale trough firmly entrenched over the western half of the country and a broad ridge located downstream over the eastern seaboard. At the surface, high pressure over the western Atlantic continues to ridge southwestward into the Southeastern CONUS, maintaining a generally east to northeast low- level flow across the local area. Subsidence beneath the upper ridge will keep rain chances out of our local forecast through the next 24 hours, but moisture streaming in from Eta's broader circulation and influence will keep dewpoints elevated and allow this pesky cloud cover to linger. Mostly VFR conditions prevail tonight until the lower clouds return once again Monday morning.
217 PM CST Sun Nov 8 2020 An upper level trough is over the western half of the country with an upper ridge over much of the east coast. High temperatures today will be a little warmer than yesterday but will generally be in the 70s and 80s. The upper trough to the west will progress eastward on Monday with a Pacific front accompanying the trough. Temperatures across southeast New Mexico and west of the Upper Trans Pecos will be a little cooler on Monday with the approach of the upper trough but temperatures across the rest of the area should be similar to those today. High winds are possible in the Guadalupe Mountains as the base of the upper trough approaches and begins to move over the region.