Aikyam-Lab/Synoptic-Bench huggingface dataset:
939 PM EDT Tue Oct 24 2017 The slow moving cold front is taking its time through the forecast area this evening with dewpoints still in the lower to mid 70s south and east of a Kenansville to Titusville line. Cooler air will gradually work in behind the front with lows into the mid to upper 50s across the nrn interior to lower to mid 60s across coastal and far srn areas. Winds near the frontal trough are light this evening but will increase behind the front through the night as the frontal boundary sharpens and moves southeast through the srn waters late. The first significant cold front of the season is pushing through central Florida this afternoon preceded by scattered showers and storms south and east of Orlando. Much drier and cooler air will filter down the peninsula tonight and Wednesday.
1041 PM EDT Tue Oct 24 2017 Secondary cold front just to the north of our CWA this evening, and will move through the area tonight. Other than perhaps in increase in high clouds, and cooler morning lows this front will cause winds across the coastal waters to increase. Northwest winds will surge tonight as the secondary cold front moves through.
The water vapor shows great timing to sample with the axis of the trough right overhead from TXK to SHV to MLU. /issued 317 PM CDT Tue Oct 24 2017/ Will likely see the coolest temps of the season thus far across the area as blustery nw winds ushering in cooler air with gusts as high as 40 mph. Wx pattern becmg slightly more progressive and have raised overnight lows Wednesday night at least a couple degrees as the high pressure begins to move eastward.
Light echoes are still showing up along the Cumberland Plateau as a highly-amplified upper trough swings through the mid state.
1025 PM EDT Tue Oct 24 2017 A chance for showers will continue into Wednesday, as a trough of low pressure remains centered over the Great Lakes. High pressure will move into the area late in the week, with a slight increase in temperatures.
There may be a few passing high clouds, but the departing trough should ensure that most of the Mountain Wave cirrus remains east of the area. While there is some bust potential given that most NWP remains on the mild side, I've nudged temperatures towards the cooler end of the guidance envelope. Temperatures will drop quickly through the 60s prior to 10 pm, bottoming out in the lower 40s everywhere by daybreak Wednesday. The wind shift will shut off the cold air advection, and after a chilly start, high temperatures should be 5 to 10 degrees warmer than today.
Surface pressure gradient is relaxing this evening as the Great Lakes low and upper trough continue pushing east.
Subjective 12Z upper-air analysis indicates a double-centered and stacked upper low over the Great Lakes, with centers in northwest IL/northeast IN and in eastern upper MI, and with an upper high centered over southern CA. A cold pocket at 850mb was noted, with sub-0C temperatures from the western Great Lakes to the Dakotas and central Plains and much warmer temperatures over the western US.
620 PM CDT Tue Oct 24 2017 Afternoon satellite and surface observations show a stacked low pressure system drifting eastward across the Northern Great Lakes. Model soundings indicate below freezing thermal profiles with deep lift and saturation through the DGZ and surface temperatures around 32F. Therefore, snow is the expected precipitation type until diurnal heating warms surface temperatures above freezing. After a bit of short wave ridging Wednesday, this will quickly break down as the next short wave trough drops southeast out of the Canadian Rockies Wednesday night.
940 PM CDT Tue Oct 24 2017 Winds have increased a bit over portions of central North Dakota in the wake of a passing trough. Highs are expected to range from the lower 50s northeast to the lower 70s southwest.
An extensive though generally light to occasionally moderate rain shield will continue to spread southeast through the afternoon under a very deep upper level trough. The core of the low center will continue to shift northeast and merge with the main low along the eastern fringes of Lake Superior. Wind gusts will generally peak around 25 kt given the low cloud shield, though occasionally higher gusts are possible this afternoon when cloud bases lift. Expect clearing skies late this evening into the early overnight hours to allow current low 40s to drop into the middle 30s, possibly some near freezing readings, but with a modest pressure gradient behind the weakening though still modest low, it is not an ideal frost scenario.
1029 PM EDT Tue Oct 24 2017 Cooler conditions will prevail across central Pennsylvania for the remainder of this week.
Upper level ridge remains over the region into early Wednesday for clear skies and above normal temperatures. The upper level ridge flatten Wednesday afternoon as a weak trough and associated cold front reaches the Pacific Northwest. Temperatures will reach the mid to upper 60s in the lower valleys.
High pressure will remain over the western U. Lighter winds are expected on Wednesday as high pressure builds over the Desert Southwest.
744 PM EDT Tue Oct 24 2017 Upper trough over region continues to rotate bands of low to mid level clouds through the area tonight and Wednesday.
Overnight lows will be a few degrees cooler, but similar to last night, hovering in the upper 30s to lower 40s across the region.
An upper low continues aloft Ontario overnight with troughing down into the Gulf that eases eastward. High pressure on the southern plains builds to the east.
A large eastern trough with a double barreled low over the Great Lakes region transitions to a strong ridge over the Left Coast leaving moderately fast north flow over Plains.
902 PM EDT Tue Oct 24 2017 Low pressure will maintain shower chances and cool temperatures through mid week. Those showers will fade quickly this evening as temperature falls below low convective thresholds under upper troughing. As the upper low moves east of the region Wednesday night, the chance for showers will drop off. Have continued with the chance for snow in the highest elevations, although temperatures right around the freezing mark should not allow for any snow to stick.
Mostly clear skies and generally light surface winds below 10 knots can be expected for all terminals on Wednesday with high pressure in place. /issued 250 PM CDT Tue Oct 24 2017/ SHORT TERM (Tonight through Wednesday Night): The short term period will remain pretty quiet and benign over the RGV as dry and mild surface ridging dominates the region. The low level flow pattern will then begin to shift around to a light southerly late Wed which will allow for the overnight lows to warm up a bit in addition to some rebounding dewpoints as the low level moisture return kicks in.
As a result, we upgraded the High Wind Watch to a High Wind Warning for Bordeaux and Arlington tomorrow. We have held off on the I-80 summit and the Laramie Foothills for now, due to the higher wind speeds possibly developing on Wednesday evening.
High pressure should be build- ing into the region from the NW along with the weaker gradient.
752 PM EDT Tue Oct 24 2017 Showers will gradually decrease in coverage overnight from west to east as cold front approaches the region. /issued 701 PM EDT Tue Oct 24 2017/ Latest surface observations show winds shifting to the northwest across western portions of our CWA, indicating the passing cold front. /issued 416 PM EDT Tue Oct 24 2017/ Deep troughing continues to barrel eastward across the Ohio Valley this afternoon. Latest WPC analysis shows a distinct cold front extending south southeast from the main low pressure center towards central Florida and out over the Gulf of Mexico. As the influence of the cooler/drier air behind the front draws near, minimum temperatures should drop to the mid 60s in the western peninsula to around 70 in the east.
1039 PM EDT Tue Oct 24 2017 The lift that contributed to a few light showers and sprinkles earlier this afternoon and evening has weakened even more as lobe of upper level energy moving through upper trough continues to move through the east Tennessee Valley. Patchy frost will form in the lower valleys and be more widespread higher elevations.
Winds will back to the west and west-southwest Wednesday with a warming trend with highs in the 60s and touching the low 70s over our western counties. Thu: Looks like a nice warmup with gusty southwest winds ahead of the next approaching cold front. Thu night-early Sat: An initially dry cold front will move through late Thu and Thu night.
903 PM MDT Tue Oct 24 2017 Upgraded the High Wind Watch to a Warning for the southern Laramie Range/Foothills including I-80 between Cheyenne and Laramie from late Wednesday afternoon through late Wednesday evening. As a result, we upgraded the High Wind Watch to a High Wind Warning for Bordeaux and Arlington tomorrow. We have held off on the I-80 summit and the Laramie Foothills for now, due to the higher wind speeds possibly developing on Wednesday evening.
The breezy northwest winds will persist through the afternoon but should begin to decrease this evening as brief surface ridging quickly passes through. Following the ridging, a weak clipper system is progged to quickly swing through the far northeastern forecast area late this evening and overnight. Clouds may inhibit how much sunshine we see (especially north and east) but a brief shot of decent warm advection should push high temperatures into the 60s along and west of the Red River Valley (slightly cooler 50s in the east).
823 PM EDT Tue Oct 24 2017 A strong upper level trough will cross the area Wednesday providing cool temperatures and some mountain showers.
518 PM MDT Tue Oct 24 2017 A deep trough continues to dig into the east coast, while strong ridging builds over the west.
Even though we've seen surface dew points jump 10 to 20 degrees over the past 24 hours, that's still only into the lower 30s.
/issued 317 PM CDT Tue Oct 24 2017/ Will likely see the coolest temps of the season thus far across the area as blustery nw winds ushering in cooler air with gusts as high as 40 mph. Wx pattern becmg slightly more progressive and have raised overnight lows Wednesday night at least a couple degrees as the high pressure begins to move eastward.
A large low height anomaly/upper low sits near the western Great Lakes this afternoon. Winds will be breezy as the trough goes by but will eventually lighten up. A few sheltered, normally cooler locations may receive some frost.
The longwave upper level trough stretching from the Great Plains to the western Atlantic will dig slightly further southward, with the base reaching as far south as the central Gulf of Mexico. This trough will also shift eastward through Wednesday afternoon. Another reinforcing shot of cool dry air is set to move across the forecast area this evening, with the lowest temperatures so far this fall occurring overnight.
An upper level trough was moving into Mid TN from the northwest this afternoon with scattered showers. Wednesday will be a chilly day (almost 10 degrees below normal) with a very sharp upper level trough axis extending from the Great Lakes to the Gulf Coast.
Rain showers will linger across central Indiana today as an area of low pressure continues to rotate over the Great Lakes Region.
Highs are expected to range from the lower 50s northeast to the lower 70s southwest.
Northwest surface winds trend to light west overnight, and then to southwest by late morning Wednesday as lee trof takes shape over eastern New Mexico. Southwest and west surface winds will gust into the 22 to 27 kt range Wednesday afternoon as lee trof deepens. These west downslope winds should keep low temperatures above freezing tonight despite the dry air mass.
/issued Issued by National Weather Service NASHVILLE TN/ Cool, cloudy and windy afternoon across much of the Mid South today as an upper trough axis swings by overhead, with temperatures only in the 50s and 60s, dewpoints way down into the 20s and 30s, and west to northwest winds gusting over 30 mph at times. With skies becoming mostly clear, dewpoints below freezing, and winds subsiding, appears patchy frost is a good bet across parts of West Tennessee and northern Mississippi late tonight.
701 PM EDT Tue Oct 24 2017 Lastest surface observations show winds shifting to the northwest across western portions of our CWA, indicating the passing cold front. /issued 416 PM EDT Tue Oct 24 2017/ Deep troughing continues to barrel eastward across the Ohio Valley this afternoon. Latest WPC analysis shows a distinct cold front extending south southeast from the main low pressure center towards central Florida and out over the Gulf of Mexico. As the influence of the cooler/drier air behind the front draws near, minimum temperatures should drop to the mid 60s in the western peninsula to around 70 in the east.
734 PM EDT Tue Oct 24 2017 As deep low pressure over the Great Lakes drifts northeast into southern Canada tonight, the attending cold front will continue to sweep through the North Country this evening with rain ending from west to east.
Nevertheless feel with the dry air in place and clear skies, winds should be light enough to allow temperatures to drop into the lower 30s in the cold river valleys and other low spots across western Nebraska. Humidity will be quite low as very dry air moves east off the higher terrain, but winds aren't expected to be strong enough to warrant any fire weather headlines. Arctic air arrives late Wednesday night with the passage of a strong cold front.
732 PM EDT Tue Oct 24 2017 As deep low pressure over the Great Lakes drifts northeast into southern Canada tonight, the attending cold front will continue to sweep through the North Country this evening with rain ending from west to east.
731 PM EDT Tue Oct 24 2017 A chance for showers will continue today and into Wednesday, as a trough of low pressure remains centered over the Great Lakes. High pressure will move into the area late in the week, with a slight increase in temperatures.
Temperatures will drop quickly through the 60s prior to 10 pm, bottoming out in the lower 40s everywhere by daybreak Wednesday. The wind shift will shut off the cold air advection, and after a chilly start, high temperatures should be 5 to 10 degrees warmer than today.
612 PM CDT Tue Oct 24 2017 A pronounced long wave trough over the Great Lakes is driving the weather conditions over our area with cooler air and a tight pressure gradient creating gusts in the mid to upper 30s. This trough will slowly progress to the east allowing ridging and some warmer air to advect over our region Wed and Thur allowing our temperatures to recover back into the upper 60s and lower 70s.
Very warm/hot and dry conditions prevail over the region as high pressure remains over the West Coast. Numerous records fell today as high pressure ridging over the Pacific Northwest into the Great Basin coupled with a thermal trough along the California coast brought about another day of offshore flow across the forecast area. The ridge of high pressure over the region is forecast to weaken Wednesday which will result in slight cooler temperatures.
640 PM CDT Tue Oct 24 2017 High pressure is settling into the area this evening as skies remain clear and the winds have begun to relax. /issued 344 PM CDT Tue Oct 24 2017/ A reinforcing dry cold front pushed through the area this morning ushering in even drier air amidst breezy northerly winds. The rather pleasant cool, dry weather will continue Wednesday with high pressure in place across the western gulf.
Strong offshore flow will continue through the night in the wake of a cold front that moved through the area earlier today. Winds and subsequently seas will weaken on Wednesday as high pressure builds across the western gulf.
Very warm/hot and dry conditions prevail over the region as high pressure remains over the West Coast. Strong high pressure over the region this afternoon along with offshore flow has resulted in very warm to hot temperatures. Temperatures are forecast to cool slightly on Wednesday, especially near the coast yet will remain a good 10 to 15 deg F above seasonal averages as the ridge aloft weakens. With this, look for widespread 80s again Wednesday afternoon with many locations in the North Bay and Salinas Valley again reaching into the lower 90s. A few additional degrees of cooling is expected late in the week as the ridge weakens and light onshore flow returns to the coast. However, the broad mid/upper level ridge will remain stretched along much of the West Coast through late week and potentially into the weekend. SFO Bridge Approach.
640 PM CDT Tue Oct 24 2017 An extensive though generally light to occasionally moderate rain shield will continue to spread southeast through the afternoon under a very deep upper level trough. The core of the low center will continue to shift northeast and merge with the main low along the eastern fringes of Lake Superior. Wind gusts will generally peak around 25 kt given the low cloud shield, though occasionally higher gusts are possible this afternoon when cloud bases lift. Expect clearing skies late this evening into the early overnight hours to allow current low 40s to drop into the middle 30s, possibly some near freezing readings, but with a modest pressure gradient behind the weakening though still modest low, it is not an ideal frost scenario.
A quiet period can be expected across western Kansas through late Saturday as upper level ridging moves eastward across the Western High Plains to kick off the early part of the weekend. Look for lows back down into the 40s(F) across central Kansas tonight to possibly the lower 50s(F) in extreme southwest Kansas. This will advect warmer air into the area, raising H85 temperatures well up into the teens(C) across central Kansas to near 25C along the Colorado border.
This instability will likely hang around but lessen slowly until just after midnight (as the low pushes further southeast). The exception may be Southern Middle Tennessee, which might dry out by then and see cooler low temperatures. On Mother's Day, highs should reach the u70s-l80s as an 850mb ridge over the Ozark Plateau builds into the southeast U.
The pressure gradient will tighten slightly between high pressure ridge to the south and approaching frontal trough.
921 PM CDT Fri May 12 2017 Skies have finally cleared out across most of the area in the wake of the departing upper low.
All precip should have moved off to the east with the low by midnight or so and no POPs are being carried after 06z. The cold front that spawned the tornado has since pushed off to the east where it is continuing to produce severe storms across parts of southeast Louisiana into MS and AL. The center of the upper low associated with the front is currently near Monroe, LA and is swinging wrap around cloud cover through the area. The upper low will push off to the east by early tomorrow as upper level ridging builds into area setting up a very pleasant weekend.
Then a series of low pressure systems will move through the Desert Southwest bringing cooler and breezy conditions.
Gusty winds will persist in many areas tonight followed by cooler and somewhat calmer conditions Saturday.
As one upper level trough moves away, another moves onto the west coast with an upper level ridge in between moving into Texas.
831 PM EDT Fri May 12 2017 Low pressure will track over the Deep South through Saturday, bringing showers and thunderstorms in advance of it.
/issued 452 PM EDT Fri May 12 2017/ Latest water vapor imagery shows a defined tough draped along the southern CONUS with the tightly wound low pressure center over Arkansas. Surface analysis indicates a cold front stretching from this low southward, towards the Gulf of Mexico.
A low pressure system over the Pacific Northwest will continue moving slowly east while weakening this weekend.
A few of the high resolution model runs have indicated small chances for some sprinkles or spotty light rain late this afternoon and again late tonight with a combo of this weak energy and a surface boundary along the ND/SD border. With an approaching upper level ridge, southerly low level flow, and increasing heights during the day Saturday, temperatures will rise quickly. Highs Saturday look to range from near 70 degrees along the Canadian border to the upper 70s/near 80 in the mid valley and the lower 80s in the far southern valley.
The weekend continues to look dry with warming temps as an upper level ridge builds eastward into the Midwest.
Chattanooga Airport, TN 61 75 54 82 / 40 10 0 0 Knoxville McGhee Tyson Airport, TN 59 72 53 80 / 50 10 0 0 Oak Ridge, TN 60 74 52 81 / 40 10 0 0 Tri Cities Airport, TN 56 71 48 77 / 70 10 10 0.
/issued 320 PM CDT Fri May 12 2017/ Tonight will be fairly quiet as upper ridging moves overhead.
Showers and thunderstorms continue to increase in coverage across most of north central and southwestern Montana this evening, as a cold front passes across the state.
The cold front is expected to march through our CWA from west to east during the overnight hours. BMickelson Previous short term discussion: After a very warm afternoon across northeast Montana, the upper ridge axis will shift east as a Pacific trough deepens and heads for the western CONUS. This will mean a weather pattern shift with predominantly cooler and cloudy conditions with frequent chances for showers, and perhaps a thunderstorm. Latest 12z models do show the influence of that trough starting to reach the area on Saturday with upper level southerly flow residing over eastern Montana.
Low Pressure across the Nrn high plains drops south Saturday to near the Black Hills.
High pressure and a weak gradient over the Florida Keys is resulting in light and variable winds this evening.
The cold front responsible for the high winds in the Western Magic Valley late this afternoon and early evening pushed into eastern Idaho. Showers will increase in SE Oregon late tonight and SW Idaho on Saturday as an upper low near the PacNW coast shifts inland. Deep upper low in WA moving southeastward.
As of 3pm Friday, a 500mb ridge axis has passed east of the Continental Divide.
GOES-16 water vapor imagery depicted an upper low slowly spinning through AR. The latest short range and mesoscale models indicate the upper low will be slower and tracking further south into MS and AL tonight into Saturday morning. This as the cold front over northern TN sinks southward. Further south, activity is a bit more conditional as the upper low drops into MS. The NAM in particular shows very little activity in north AL this evening, with the surface/850mb convergence zone activating as the upper low drops into MS. On Mother's Day, highs should reach the u70s-l80s as an 850mb ridge over the Ozark Plateau builds into the southeast U.
1148 PM CDT Fri May 12 2017 VFR conditions to prevail at most TAF sites through the rest of the night as high pressure builds into the region. Moisture wrapping around the backside of an upper level low centered over Mississippi could result in some MVFR ceiling restrictions at KAEX through early morning.
Residual moisture from earlier rains are inducing radiational fog that should lift to a canopy level thin cloud deck before mixing out with cooler and drier advection during the night.
The upper level low is finally pushing off to our southeast and is currently located just east of ArkLaMiss. Temperatures on are on track with lows dropping into the low to mid 50s across the area. Water Vapor Satellite trends this afternoon show an upper level low centered over Southwest Arkansas with a 700 mb deformation zone extending northeast into the Mid-South. This has resulted in additional development of showers and a few isolated showers and thunderstorms across the Lower Mississippi Valley as indicated by regional WSR-88D radars. Showers and a few embedded thunderstorms will gradually begin to diminish across the Mid-South tonight as the upper level low moves southeast away from the area. Lows tonight will be slightly cooler in the middle 50s near the MO/KY border and upper 50s to lower 60s south.