Aikyam-Lab/Synoptic-Bench huggingface dataset:
More significant convection is expected Monday afternoon as a vigorous short wave trough moves across the lower Mississippi Valley and a cold front pushes into the region.
Once the trough passes. It could become pretty windy on the ridges and high passes late tonight into Monday morning potentially causing blowing snow in open terrain. Could see some of this momentum moving downslope producing gusty winds in the lower foothills towards dawn. There is no snow falling in the high country right now. There is weak flow aloft right now with a minor trough moving across. The boundary layer flow will be weak drainage overnight, then southwesterlies Monday early with a cold front moving in during the afternoon Monday. Monday night, short wave moving around a broad upper trough over the Pacific Northwest will continue to stretch the trough in more of west-east orientation.
Wayne and Oakland indicate roads have become quite slick due to freezing drizzle across several counties with one or two accidents already reported. cannot discount some patchy icing over nern Neb for a couple hours this morning given pavement temps up there are currently hovering around the freezing mark.
Moisture will return during the night and with lift persisting in the low levels. It generally appears to be freezing drizzle across much of the area initially although southern Iowa will climb above freezing toward daybreak with transition to drizzle.
127 AM EST Mon Jan 2 2017 Low pressure will slide slowly into the area from the southwest early this week. The cold front associated with this low pressure area will cross Pennsylvania on Tuesday or Tuesday night.
The weak, shallow cold front will remain nearly stationary during the evening, before slowly returning north overnight. Since clouds look rather solid over northwest WI and the Upper Peninsula, think the low stratus will likely stick around through the night north of RHI, though central WI should have better luck. Through early in the evening, precip should be mainly snow over central and north-central WI where temps should be in the lower 30s. Over eastern WI, temps will be a little warmer, which should yield a wintry mix of rain/snow/sleet. Highs in the low to mid 30s.
Will need to see if any bowing segments manage to form, but getting damaging winds down through the low level inversion will be a tough task. Areas up along the I-64 corridor could see temps down to the lower 20s or so by sunrise Wed.
/issued 352 PM CST Sun Jan 1 2017/ (Tonight and Monday) A band of showers and thunderstorms near El Paso at 3 PM, associated with a strong upper low and Pacific front, will move into Crockett county and western sections of the Concho Valley and Big Country late this evening, then across the rest of West Central Texas after midnight. Went closer to the warmer GFS MOS temperatures.
with the expectation that vsbys will continue to gradually crater overnight as a warm front extending from the Lower Toledo Bend Country of Deep E TX across Cntrl LA/MS begins to slowly lift N across N LA/E TX and possibly into far Srn AR overnight. before conditions slowly improve as sct convection develops ahead of the approaching upper trough now entering W TX. This trough remains progged to traverse E across TX overnight. The progs continue with a slower movement of the trough. this obviously would actually help improve vsbys a bit before convection begins to deepen after 12Z especially over E TX ahead of the trough.
459 AM EST Mon Jan 2 2017 High pressure will crest the region today. Low pressure from the great lakes on Tuesday will reform off the mid Atlantic coast and lift north toward southeast Maine Tuesday night.
434 AM EST Mon Jan 2 2017 A low pressure system approaching from the southwest will bring widespread showers to the area tonight. Weak disturbances following the low will allow shower chances to continue Tuesday and Tuesday night.
Warm front has been lifting northward into southwest Kansas today.
Models still similar with bringing initial cold front in overnight tonight. GFS appears to be having trouble with western extent of upper trough, with the ECM having better consistency on keeping strongly positively tilted trough intact.
The first cold front moves through Monday night bringing noticeably cooler temperatures.
Increased surface moisture along this boundary is allowing for stratus/fog/freezing fog to develop. Models continue to push a cold front down south into the region later this afternoon. with the passage of a cold front thru the region. Do expect some lingering moisture on the tail end of the front over far eastern zones to allow for low clouds and possibly some freezing drizzle in spots for a few hours between 00z- 06z Tuesday. to the lower teens east and southeast.
338 AM EST Mon Jan 2 2017 Low pressure will slide slowly into the area from the southwest early this week. The cold front associated with this low pressure area will cross Pennsylvania on Tuesday or Tuesday night.
1252 AM EST Mon Jan 2 2017 Warm front pushes northeast tonight into Monday night. A cold front crosses late Tuesday.
The upper trough will continue digging into the northwestern states tonight, becoming more elongated in a west-east fashion Monday into Tuesday in a shearing fashion. Southerly return flow will draw relatively shallow low-level moisture northward from the southern Plains into central/eastern Kansas tonight into Monday in response to the low pressure. Will continue with the theme of above normal highs ranging from the 40s over the northwest part of Kansas, to the lower 60s near the Oklahoma border.
Winds will diminish late in the day, but are expected to become more westerly and pick up again after 04z with the cold frontal passage. /Issued 334 PM CST Sun Jan 1 2017/ A short wave trough will pass east out of the southern Rockies and across West Texas tonight. an arctic cold front drops south into the Oklahoma Panhandle and then slowly surges south Monday night and Tuesday morning. The high temp Tuesday could be in the morning just before the cold front moves through. The medium range models diverge sharply after Tuesday with the GFS now forecasting an upper ridge over the Intermountain region of the west and keeping the upper troughs well north of the Panhandles through the end of this week.
There is also a 500mb ridge sitting over the Bahamas, helping to keep the showers fairly light, and isolated, to low end scattered in nature. As the day progresses, the high will slowly breakdown, ahead of an approaching low pressure system, and an associated 500 mb short wave, which will be over the Mississippi valley by this evening.
There may be a brief 1-3 hour window where patchy light freezing drizzle could form over northern MO. Best bet for some mid level moisture and thus better rain chances will be across the southeastern 1/3 of the CWA in better proximity of the upper trough. Models are pretty similar in developing a secondary area of light rain Monday evening as a cold front slides southeast.
The latest guidance is in fairly good agreement that the low will track across central Mississippi instead of North Mississippi or West Tennessee. A weak cold front will sweep across the Midsouth tonight. Tomorrow will be slightly cooler with a few light rain showers possible. An Arctic cold front will arrive in the Midsouth tomorrow afternoon.
1127 PM MST Sun Jan 1 2017 One system travels south of the area this evening while westerly flow and the polar jet and approaching cold front consolidate over the northern half of the area through the next 48 hours. The cold front that will stretch across the area tonight should remain stalled there through Monday night. The eastern Uinta Mountains will border on snow advisory criteria and will stand watching, though the general westerly flow at mountaintop level is a better snow producer over the higher western Uinta mountains than over the eastern part of the range.
355 AM CST Mon Jan 2 2017 The main area of showers and thunderstorms associated with the northern Texas upper low is moving quickly east across southern Oklahoma and northern Texas and will move across mainly southeast Oklahoma into northwest Arkansas this morning. The arctic cold front is still due to arrive late tonight and Tuesday morning.
448 PM EST Sun Feb 5 2017 Centers of high pressure are in place across the southeast and the adjacent Atlantic waters east of the Carolinas. A weak trough and associated boundary is just north of the northwest Bahamas islands.
Slight ridging/zonal flow aloft is directing most moisture north of the International border, with only isolated snow showers drifting through Northeast Montana this morning, mainly along the Northern Tier. KGGW temperatures are already around 5F warmer than expected this morning, but then Tmin remained around 5F warmer than expected. Arctic air has moved in over the Bulk of central Canada with a trough extending back into British Columbia and off its coast where it is dipping south slightly. Northeast montana lies on the border of these two airmasses under a very sharp gradient that is acting as a lift zone as cooler air marches south.
Southerly winds behind a north- northwest progressing warm front will usher in more low-level moisture keeping at least a broken deck around. /Issued 1045 AM CST Sun Feb 5 2017/ Surface warm front is pushing through the Coastal Bend at this time with near 70 degree dewpoints left in its wake.
Cloud cover continues to keep temps cooler than model forecast projections over most areas.
1036 AM MST Sun Feb 5 2017 A weak upper ridge covers the western CONUS, with northwest flow over the northern plains. With high pressure stretching over the Dakotas, winds are generally light and easterly across western SD. Upper ridge will slowly shift eastward today, and warm air will advect into the region. Similar temperatures are forecast for Monday, and possibly a bit cooler across the northwest as cold air sinks southward.
300 PM EST Sun Feb 5 2017 Warm today under high pressure.
With the low level moisture in place. A weak disturbance will move ahead of a low pressure system. bringing moisture advection and warmer temps to the area Monday.
This front will begin lifting northward as a warm front by late this afternoon into the early morning hours. In addition, have adjusted highs around the I-40 corridor a tad warmer thanks to the mostly sunny skies and have adjusted much of North Mississippi a tad cooler due to the cloud cover. /issued 413 AM CST Sun Feb 5 2017/ Its 10-20 degrees warmer this morning than it was yesterday. Its a bit cooler in Northeast Arkansas where skies have cleared. Over the next 48 hours flow aloft will gradually transition from weak northwesterly to weak Southwesterly as a trough moves out of the Rockies into the Southern Plains. Southerly flow will strengthen today bringing a moister and warmer airmass back across the Midsouth.
322 PM CST Sun Feb 5 2017 Surface observations show that a warm front is located just north of the CWA across southern Mississippi and central Louisiana. Temperatures will respond by moderating with highs increasing into the mid 70s except along the coastlines where cooler coastal waters limit warming.
Warm frontal boundary is now through a Hebbronville to Pleasanton line with VFR ceilings in the wake of the boundary and temperatuers in the mid-upper 70s. Fog will lift by mid morning Monday with mostly cloudy and warmer conditions expected with highs ranging from the upper 70s to upper 80s.
High pressure briefly builds in from the northern Plains into the upper Midwest today resulting a break in precipitation before another round of light snow tonight. Tonight into early Monday a warm front lifts north across the northern Plains and upper Midwest, resulting in a period of light snowfall for areas north of Highway 2. Focus for short-term forecast was on the snowfall associated with a warm front lifting north into northern Minnesota late today into tonight.
124 PM EST Sun Feb 5 2017 High pressure centered just south of the forecast area this afternoon with a low pressure system crossing Southern Canada and the Great Lakes Region. High pressure will rebuild across the area tonight and Monday.
237 PM MST Sun Feb 5 2017 Low amplitude ridge is crossing the northern Rockies into the northern plains. however warmer air is overrunning the arctic airmass in place across western SD. Max temp forecast for Monday will also be complicated much like today given the lack of confidence at which extent the warmer air reaches the surface across the SD plains.
321 PM CST Sun Feb 5 2017 211 PM CST Non-winterlike weather continues as high pressure will briefly transit the area tonight. Otherwise light winds and at least partially clear skies will result in a cooler night than last night. Low level moisture will move northward ahead of a rather quick moving upper trough across the western U. An elevated warm front will shift northeastward through the afternoon, though ahead of any deeper moisture which would preclude much more than lighter rain showers in the afternoon.
305 PM CST Sun Feb 5 2017 Mostly sunny skies today across the area as weak high pressure moves northeast of the state, with light north winds slowly shifting to the east then southeast through today. Also kept overnight lows several degrees warmer across the south as clouds come in around the midnight hour and move northward.
235 PM EST Sun Feb 5 2017 Isolated rain or snow showers will accompany a weak cold front this evening.
1112 AM CST Sun Feb 5 2017 Despite a weak frontal boundary sagging south across the region today, upper level ridging and mostly clear skies will still allow temperatures to rise into the 50s near and south of the Missouri River this afternoon with 40s to the north. Despite the clouds and precipitation, WAA alone will bring temperatures well above average with highs ranging from the lower 50s over northern MO and middle 60s south of Hwy 50.
148 PM EST Sun Feb 5 2017 A breezy cold front will pass with little if any precipitation this evening. High pressure and fair weather on Monday will be followed by widespread precipitation moving in Monday night and lasting into mid-week.
341 PM CST Sun Feb 5 2017 As of 2115z, a warm front continues to move northward across the region and is located just south of Interstate 20. North of the front, daytime temperatures struggled into the low 50s, but south of the front, strong warm air advection allowed temperatures to quickly warm into the low to mid 70s. Patchy showers continue in an area of isentropic ascent along the warm front. Otherwise, more patchy dense fog is expected areawide tonight as low level moisture surges northward following the warm front.
343 PM EST Sun Feb 5 2017 High pressure and dry air will build in tonight through early Monday behind a weak cold front.
216 PM EST Sun Feb 5 2017 A breezy cold front will pass with little if any precipitation this evening. High pressure and fair weather on Monday will be followed by widespread precipitation moving in Monday night and lasting into mid-week.
124 PM EST Sun Feb 5 2017 A breezy cold front will pass with little if any precipitation this evening. High pressure and fair weather on Monday will be followed by widespread precipitation moving in Monday night and lasting into mid-week.
Middle Tennessee will actually find itself in a col during the afternoon, with high pressure centered to the north and south, low pressure to the east and west. Overnight, a warm front will move toward Middle Tennessee from the south, but any precipitation will hold off until after 12Z.
110 PM EST Sun Feb 5 2017 High pressure centered just south of the forecast area this afternoon with a low pressure system crossing Southern Canada and the Great Lakes Region. High pressure will rebuild across the area tonight and Monday.
1207 PM EST Sun Feb 5 2017 Low pressure will approach from the west today. The low will track north of Maine tonight drawing a cold front across the region. The low will exit across the maritimes Monday.
Main trigger for new cloud development will be warm advection ahead of approaching low pressure. High pressure will be overhead this evening, slowly sliding eastward overnight.
For Monday low pressure develops over the southeast portion of the forecast area with winds behind it and generally along/west of the interstate reaching gusts to 25 mph from the northwest. For Monday am going for highs in the low to upper 60s. The stronger WAA will cause temperatures to be warmer than today. Monday night lows will be warmer than tonight due to the warmer air mass in place.
Mild weather continues to melt snow in the lower valleys. Pacific upper low near 40/130 is beginning to move east. Low will move faster tonight toward the ene as it opens into a trough. The trough will weaken as it moves through our CWA overnight, but rain and snow showers will increase. Surface cold front will pass through our CWA Monday afternoon with breezy southeast winds shifting to northwest. The main upper low near Vancouver Island will move inland and weaken Monday as a new low takes its place off Vancouver Island. Colder air will come into our CWA Monday night behind the cold front and under the upper trough.
1148 AM CST Sun Feb 5 2017 Maintained patchy fog through the morning hours across Southeast KS ahead of a slow moving cold front but confidence remains fairly low at this time. A warm front will lift north of the area on Monday with breezy southwest winds advecting drier and warmer air across the area.
244 PM MST Sun Feb 5 2017 Weak ridging aloft will be over Colorado this evening with a moderate westerly flow aloft. Moisture will be increasing over the mountains Monday night as flow aloft increases behind the passing trough from a jet pushing in from the west. The downsloping winds will help keep minimum temperatures mild across the area and the lower foothills and plains dry.
At present time the air mass remains quite shallow (less than 3000 feet deep) and is likely moving a little slower than a normal arctic due to steady westerly flow across the higher terrain. Farther to the south impacts will be mainly limited to the higher terrain with the valleys largely remaining in rain or mixed wintry precipitation. This will be the case until Monday afternoon when a cold front moves southeast through the Northern Rockies.
940 AM MST Sun Feb 5 2017 Zonal flow across the area should allow for a warmer day. Winds have turned to the southwest and with surface pressure falls over eastern Montana, would expect this warmer air to spread east through the day. Left the highest PoPs in the mountains where a steady feed of pacific moisture will produce a few inches of snow today. as warmer air in west spreads eastward. as cold front crosses the area. Additional upper air support arrives Monday afternoon in the form of a Pacific trof.
The precipitation at this time is not affecting the remaining terminals but that will change throughout the course of the day as computer models show the activity shifting north with the warm front. Unfortunately, narrowing in a specific category for either CIGS or VIS may prove difficult as not sure how things will go once the warm front push north of all the terminals. Warm front nudging against east tx portion of the area, with fog increasing over portions of TX just outside the cwa, so will keep patchy fog in fcst for east TX thru 9 am.
246 PM EST Sun Feb 5 2017 A nearly zonal upper-level flow prevails across the continental United States today, with ridging inducing weak large-scale subsidence in the middle and lower troposphere over the Florida Keys and adjacent coastal waters.
225 PM EST Sun Feb 5 2017 Warm today under high pressure.
300 PM CST Sun Feb 5 2017 Wx map shows warm front moving north across East Texas and North Louisiana, positioned roughly south of I-20.
353 PM EST Sun Feb 5 2017 A cold front will pass through the area this evening triggering a few snow showers and flurries. Monday will feature dry weather under a high pressure system.
120 PM EST Sun Feb 5 2017 Behind a departing cold front, weak high pressure will build into the area today and tonight, allowing some sun with just a few clouds today.
Meanwhile, warmer temps in the upper 50s to near 60 degrees are likely across the far southern counties where a few peeks of sun are possible through this afternoon. A warm front will lift northeastward tonight, with temperatures either remaining steady or rising slightly through the night, with rain chances continuing, especially across the western half of the state. A warm front will push north of Central Alabama on Monday, with rain pulling northward out of the area temporarily during late Monday afternoon into Monday evening.
It appears the warm front has pushed to the north of the metro area this morning, causing temperatures to rise into the upper 60s south of the front and a fairly sharp rise in ceiling heights from north to south. /ISSUED 415 AM CST Sun Feb 5 2017/ Low clouds, drizzle & patchy areas of -ra, fog are being observed early this morning as a warm front makes its way inland.
Weak high pressure aloft across the region today will give way to an active and wet weather pattern beginning Monday, and continuing through much of the week. With the ridge in place and plenty of sunshine, temperatures have warmed into the upper 40s to low 50s across many valleys including the Wasatch Front by mid morning.
312 PM CST Sun Feb 5 2017 A much warmer day today as expected. As moisture streams into the region, patchy fog and drizzle will likely develop across the region later tonight and early Monday ahead of a subtle surface warm frontal boundary. Ahead of the low, gulf moisture will continue to stream northward into the region.
Fog and low clouds are forecast to dissipate across northeast Oklahoma this afternoon with the low clouds hanging on longer across southeast Oklahoma. The low cloud shield is working into northwest Arkansas as well.
The low cloud shield is working into northwest Arkansas as well.
215 PM CST Sun Feb 5 2017 Despite the passage of a weak cold front early this morning, warm advection will be the theme for the next few days before a strong cold front sends temperatures back to near-normal by the mid-week.
Currently caught between an upper low in the northern high plains along the Canadian border. The upper level ridge that brought the very pleasant weather to our area over the past several days will begin to deamplify as it shifts off to our east later tonight into Tuesday, allowing a moist southwest flow to set up over the region and hold through this forecast period. Meanwhile, models suggest upper level ridging builds over the eastern U.
A ridge of high pressure remains to the east of the region this afternoon while ridging is also occurring aloft.
103 PM EDT MON MAY 23 2016 High pressure will gradually build into the area this afternoon into tonight and will then move off the Southeast coast by late Tuesday.
1158 AM MDT MON MAY 23 2016 Cold front has stalled along the southeastern fringes of the forecast area from Hill City to Gove.
146 PM EDT MON MAY 23 2016 High pressure will push slowly east across the region today and Tuesday, providing dry conditions and a gradual warming trend. With a decent amount of sunshine today went on the warm side or warmer than guidance for temperatures.
353 PM CDT MON MAY 23 2016 Area remains water under upper ridge with upper troughs located over the east coast and the western U. The pattern should generally persist into late week when mean trough over western U. shifts eastward and several short wave rotate through trough, allowing moisture to spread eastward across the lower Mississippi River valley.
/issued 323 AM EDT MON MAY 23 2016/ Surface analysis depicts a cold front boundary now pushing southeastward across Central Florida and slowly approaching the area. Model solutions show reasonable consensus in keeping an upper level low and an associated mid/upper trough lingering across the Mid Atlantic and Northeast states today and through Tuesday. A series of short wave impulses will move around the base of the main trough, reaching Florida at times.
As an upper level trough digs into the western conus mid week, the area will see a break from precip.