Aikyam-Lab/Synoptic-Bench huggingface dataset:
319 PM EST Thu Dec 17 2020 High pressure will build over the area through Friday.
The BYX 88D indicated narrow bands of convective showered developing over the western Straits and offshore southeast Gulf waters, with the most significant band likely associated with a pre-frontal trough feature and veering wind shift. The Keys were sunny and humid with temperatures climbing into the upper 70s and dewpoints in the lower to mid 70s. This afternoon, guidance remains steadfast with a prefrontal trough feature turning winds initially west to northwest early this afternoon, with the main front due pre-sunset with increase to breezy conditions tonight. Small Craft Shoudl Exercise Caution headlines remain for the Gulf waters north and west of the Lower Keys as northwest winds are expected to increase later this afternoon. As high pressure builds to the southeast U.
200 PM CST Thu Dec 17 2020 Positively-tilted upper trough to track east across the Panhandles by late Friday and Friday night. A cold front will also push south and east across the forecast area Friday.
Chilly high pressure will build into the region through Friday night. -Blaes An upper-level trough centered over the MS valley will move eastward through the Eastern US through Friday. High pressure centered over the lower Ms Valley/northern Gulf Coast will begin to build east into the area overnight, resulting in low- level cold dry air advection.
152 PM CST Thu Dec 17 2020 Surface winds have responded to the surface lee trough and have veered to a more southerly direction. Overnight lows should be mild compared to the past several nights as surface winds will remain out of the south to southwest around 10-15 mph with temps likely staying above freezing over much of the FA. By tomorrow afternoon surface winds will become more westerly as an upper level trough approaches from the west.
This has resulted in a rather dreary winter day with temperatures remaining relatively steady in the low to mid 30s this afternoon. This will allow temperatures to drop into the low to mid 20s overnight. Afternoon highs are expected to be in the low to mid 40s. Period will begin with surface and upper level ridging heading off to our east.
1116 AM CST Thu Dec 17 2020 For 12/17/2020 18Z TAF Issuance Low clouds are finally clearing the Acadiana terminals, with VFR now observed areawide along with light SFC winds as high pressure prevails. Winds expected to generally be northerly today around 5 to 10 kts, with light and variable winds setting in by Thursday evening as high pressure becomes better centered over the region. This combined with continued winds have kept temperatures warmer than what was otherwise expected. So far the only freezing temperatures found are across East Texas where clouds cleared earlier this evening. Latest satellite imagery indicates that clouds are now in the process of clearing at a more rapid pace, so temperatures may drop to the lower 30s across the northwest half of the forecast area.
Persistent northwesterly cold advection on the east side of low level high pressure centered over the Sabine River continues today. As the low level high pressure works its way east over the Lower Mississippi River Valley, then northeast towards the Tennessee River Valley, winds will ease as they become a lighter northeast. Light winds and clear skies tonight will allow for good radiational cooling and a return of freezing temperatures. Friday, with sunny skies allowing for good daytime heating and lighter northeast to easterly winds, a warmer day is in store, though below seasonal temperatures are again expected.
Thermal ridge axis will move across the area throughout the day Friday, and in conjunction with the increased southerly flow will yield the warmest day of the week with temperatures into upper 30s to low 40s for most locations.
/GG/ High pressure ridge at the surface over the lower Miss River Valley this afternoon will slowly drift to the east tonight. Southerly winds will lighten after sunset, becoming light and variable if not calm overnight under the ridge axis. Clear skies and calm winds will set up for a cool night, dropping the lows to below freezing for Central Miss and the ArkLaMiss region. Tomorrow will see temperatures warm slightly into the 50s with the winds coming around to more southerly on the back side of the ridge.
A weakening weather system will move out of area tonight which will lead to partial clearing and patchy freezing fog developing overnight into Friday morning.
614 PM EST Thu Dec 17 2020 A passing trough will maintain light snow across the region through tonight.
A potent, positively-tilted trough will approach the Mid-South Friday night.
Another question is whether patchy freezing drizzle could develop.
701 PM EST Thu Dec 17 2020 Improving conditions expected across the region tonight as high pressure settles in the wake of our impressive coastal system. Some very light snows will remain across eastern VT through the next hour, but drier air is quickly moving in as high pressure noses down from Canada. This should keep temperatures in the vicinity of Lake Champlain slight warmer than the remainder of the area with overnight lows in the upper single digits to low teens. Upper level ridging will crest overhead tomorrow with strong subsidence leading to clear and sunny skies and temperatures in the upper teens to low 20s.
The cold front that moved through the region last night and this morning is pushing out of the area, with brisk north winds and a few lingering showers continuing through this evening as we remain under the unstable core of the low.
620 PM EST Thu Dec 17 2020 An upper level trough will swing over the state late today and tonight.
Upper ridge axis continues to move closer to the area this afternoon with enough mid-level moisture for some high clouds in the Rockies and High Plains. Behind the ridge axis, the next upper trough is digging into the Great Basin area and sets the stage for our forecast through the end of the week. In response to the upper trough, surface lee troughing deepens in the eastern Rockies this evening and moves into western KS by tomorrow morning. The frontal boundary associated with the upper trough passes through during the evening hours with lows in the 20s area-wide.
616 PM CST Thu Dec 17 2020 (This evening through Friday) The mid/upper trough, currently centered near Idaho and Nevada, is expected to cross the Rockies and reach the plains late Friday. Meanwhile, a LLJ is prog'd to develop over KS and the OK/TX panhandles tonight as cyclogenesis begins over the high plains. The upper jet streak located along the southern/leeward side of the approaching trough will transport thick cirrus into our area tonight and tomorrow. Some midlevel clouds are expected to develop over NW OK tomorrow morning, with these clouds translating SE across the CWA during the day as a cold front approaches.
A combination of cold temps along with winds around 10+ MPH will result in wind chills dipping to the low to mid 30s. However, the combination of cold temperatures AND stiff winds is what results in the wind chill advisory Temps in the low to mid 30s up north along with low dewpoint depressions and clear skies will be favorable ingredients to frost formation. Cautionary criteria winds and seas will persist over the waters due to breezy northerly winds after the cold front.
834 PM EST Thu Dec 17 2020 An upper level trough will move through the area tonight, resulting in considerable clouds and cool temperatures.
Decoupled, light surface wind tonight with strenghthening wind fields above the ground associated with lee cyclogenesis in the High Plains will result in LLWS nern OK sites late tonight into mid morning. /Issued 232 PM CST Thu Dec 17 2020/ After several cold days, the sunshine has returned today with mid level high pressure building over the area.
/issued 152 PM CST Thu Dec 17 2020/ Surface winds have responded to the surface lee trough and have veered to a more southerly direction. Overnight lows should be mild compared to the past several nights as surface winds will remain out of the south to southwest around 10-15 mph with temps likely staying above freezing over much of the FA. By tomorrow afternoon surface winds will become more westerly as an upper level trough approaches from the west.
Tonight's lows will be similar to yesterday, dropping to or below freezing for areas along / north of the I-10 corridor. Tomorrow (Friday) we can expect a warming trend to begin as highs reach into the mid 50s to lower 60s and lows only fall into the low 40s to mid 50s.
615 PM EST Thu Dec 17 2020 Low pressure exits the region today, leaving cold and cloudy conditions with a few leftover snow flurries.
608 PM CST Thu Dec 17 2020 Temperatures will return to above normal Friday with breezy south winds and highs back into the lower to mid 40s.
Ordinarily today's over achieving highs would make me want to lean towards the warmer side of guidance for tomorrow. However, with the cold front that will be passing through, northerly winds behind the front, and the anticipated cloud cover, it will likely be difficult for highs to over achieve again tomorrow.
942 PM EST Thu Dec 17 2020 Many locations across the area are already near or below freezing at this hour. Temperatures will drop below freezing areawide by tomorrow morning. Skies should become clear quickly after the 500 mb trough axis clears the area and dry northwesterly flow aloft builds in over the area. Warming has been limited today underneath this stratus deck, and as a result, high temperatures are still expected to reach only into the 40s at the highest this afternoon. Highs only of mid to upper 30s are moreover expected in the higher elevations of far north Georgia.
624 PM EST Thu Dec 17 2020 Cold air will linger in the wake of the snow storm with high pressure providing tranquil conditions into the weekend. High pressure takes control of the pattern Friday into the weekend with no significant wx expected.
/issued 218 PM CST Thu Dec 17 2020/ Weak ridging over Texas today will bump temperatures back up to near normal with highs breaking into the low 60s across the E Permian Basin and Trans Pecos. Increasing cloud cover this afternoon will help keep temperatures warmer overnight. An upper level trough moving in from off the coast of California will sweep through NM Friday afternoon. As this trough moves up and out of Texas Friday evening, an associated cold front will plunge temperatures Friday night.
917 PM EST Thu Dec 17 2020 An upper level trough will swing over the state tonight.
452 PM EST Thu Dec 17 2020 An upper level trough will swing over the state late today and tonight.
326 PM CST Thu Dec 17 2020 Temperatures will return to above normal Friday with breezy south winds and highs back into the lower to mid 40s.
The trough that brought us the rain and snow overnight into this morning has pushed east reaching southern NV. This is allowing for upper level ridging to build back into northern California and helping to bring northerly flow to the region. Weaker northerly flow is expected for Friday night and generally the high clouds should clear the area by the middle part of the overnight. Upper level ridging will continue to have a hold on our weather through the weekend keeping conditions quiet and pleasant during the afternoon.
Some slick spots are possible on roads as temperatures remain well below freezing.
(This evening through Friday) The mid/upper trough, currently centered near Idaho and Nevada, is expected to cross the Rockies and reach the plains late Friday. Meanwhile, a LLJ is prog'd to develop over KS and the OK/TX panhandles tonight as cyclogenesis begins over the high plains. The upper jet streak located along the southern/leeward side of the approaching trough will transport thick cirrus into our area tonight and tomorrow. Some midlevel clouds are expected to develop over NW OK tomorrow morning, with these clouds translating SE across the CWA during the day as a cold front approaches.
759 PM MST Thu Dec 17 2020 Update: It is a mild evening across NE Montana ahead of a cold front that will move through the region in the next several hours. An upper trough moving east across Alberta and western Montana this afternoon will move into eastern Montana tonight. Cold air advection and some lower clouds will move in with the trough late tonight but clearing can be expected Friday.
The higher elevations of Clearwater County including the Grangemont to Pierce area could pick up several more inches.
346 PM CST Thu Dec 17 2020 Upper ridge axis continues to move closer to the area this afternoon with enough mid-level moisture for some high clouds in the Rockies and High Plains. Behind the ridge axis, the next upper trough is digging into the Great Basin area and sets the stage for our forecast through the end of the week. In response to the upper trough, surface lee troughing deepens in the eastern Rockies this evening and moves into western KS by tomorrow morning. The frontal boundary associated with the upper trough passes through during the evening hours with lows in the 20s area-wide.
456 PM MST Thu Dec 17 2020 Satellite imagery shows a large blanket of high/mid level clouds across much of the region this afternoon along and ahead of the cold front associated with the incoming trough. Snowfall is expected to become more widespread and reach peak intensity when lift is maximized as the trough axis moves through overnight. On the backside of the trough, flow remains north/northwesterly through the weekend. Outside of some slightly warmer than normal temperatures tonight (thanks to the increased cloud cover), expect the remainder of the next couple days to hold near to slightly below normal temperatures across much of the forecast area.
Mostly cloudy skies will be found tonight ahead and behind a passing cold front. Behind the cold front winds will be come gusty out of the northwest, with temperatures cooling into the 20s and 30s. A progressive upper-level flow pattern continues with the upper- level ridge moving quickly eastward out of the area.
A cold front has passed through most of the area, and the wind shift has occurred at most locations to the northwest. A cold front continues its trek across the area, almost all the way through. Surface analysis this afternoon drapes a weak cold front from Lake Okeechobee southwestward towards Naples. By Friday morning, lows should dip into the lower 40s west of Lake Okeechobee to upper 40s across the interior and lower to mid 50s over the eastern metro and coastal areas. As the ridge of high pressure behind the front begins to move off into the Atlantic, winds will begin to shift to a more easterly direction across South Florida this weekend.
The 00Z sounding from TBW shows considerably drier air has made it into the region with only a small amount of moisture in the lowest layer abv the sfc. Some normally cooler and more rural areas could see temperatures reach the mid 30s to the NW of I-4 across Lake, NW Orange, W Seminole, and inland Volusia, and if winds are able to become light enough, there could be some patchy frost develop in these areas.
251 PM MST Thu Dec 17 2020 A split flow trough axis to our west will slide through the region tonight. Second, this will bring some more snow showers to the high country overnight.
313 PM CST Thu Dec 17 2020 High pressure ridge at the surface over the lower Miss River Valley this afternoon will slowly drift to the east tonight. Southerly winds will lighten after sunset, becoming light and variable if not calm overnight under the ridge axis. Clear skies and calm winds will set up for a cool night, dropping the lows to below freezing for Central Miss and the ArkLaMiss region. Tomorrow will see temperatures warm slightly into the 50s with the winds coming around to more southerly on the back side of the ridge.
238 PM MST Thu Dec 17 2020 Satellite imagery shows a large blanket of high/mid level clouds across much of the region this afternoon along and ahead of the cold front associated with the incoming trough. Snowfall is expected to become more widespread and reach peak intensity when lift is maximized as the trough axis moves through overnight. On the backside of the trough, flow remains north/northwesterly through the weekend. Outside of some slightly warmer than normal temperatures tonight (thanks to the increased cloud cover), expect the remainder of the next couple days to hold near to slightly below normal temperatures across much of the forecast area.
502 PM EST Thu Dec 17 2020 A passing trough will bring light snow showers across the region through tonight.
/Issued 200 PM CST Thu Dec 17 2020/ Positively-tilted upper trough to track east across the Panhandles by late Friday and Friday night. A cold front will also push south and east across the forecast area Friday.
246 AM CST Fri Dec 18 2020 Water vapor imagery shows an upper level trough over the Rockies with moisture streaming in from the Pacific across the southern and central plains. At the surface, pressure gradient was beginning to tighten over the plains with the departing high pressure system across the TN/OH valley region and the next front along the front range of the Rockies. Temperatures this morning were in the mid to upper 20s over the eastern Ozarks where the wind was more calm, and the low to mid 30s over the western CWA which was starting to get some high clouds and a southerly wind. By this evening, the front will push into southeast Kansas with the upper level trough over western KS.
132 AM MST Fri Dec 18 2020 Upper trough axis is crossing the Rockies. Satellite shows a distinct line of clearing just ahead of the trough axis at high levels, but low clouds linger across the region. Rain/snow continues across the CWA, gradually shifting southward with the low- level trough and band of frontogenesis. As cold high pressure sinks into the Dakotas today, northwesterly winds will become breezy.
137 AM EST Fri Dec 18 2020 An upper level trough will swing over the state tonight.
235 AM EST Fri Dec 18 2020 Clear and cold conditions will prevail today and Saturday as high pressure settles over the region.
As an upper level trough moves across the Rockies today, falling surface pressures in the Plains increase southerly lower level flow over our area. This upward forcing strengthens tonight as the trough and a cold front approach. As the trough and front move across our area during the morning into early afternoon on Saturday, the showers and thunderstorms will end from west to east. Due to a cold start, the increasing clouds may make high temperatures today a little cooler than yesterday. Downslope northwesterly flow in the wake of the front on Saturday will bring warmer high temperatures.
West of the river, light south winds will keep temps a few degrees warmer. A potent, positively-tilted trough will approach the Mid-South Friday night.
Much like last night, lows will fall into the lower 20s where skies are clear. Clouds will begin to increase late Friday ahead of a sharp mid- level trough entering the western high Plains. Friday night and Saturday, the upper trough will swing eastward and then east-northeast across the Mississippi Valley. A weak surface cold front will cross the forecast area Saturday night.
Light to calm winds along with clear skies results in an excellent radiational cooling channel with freezing temperatures expected for much of the area in addition to the formation of late night frost. A bit more modified over the coast where lows look to be in the lower 40s.
1240 AM EST Fri Dec 18 2020 High pressure will build over the area through Friday.
318 AM EST Fri Dec 18 2020 High pressure will build over the region today and Saturday.
This, combined with calm winds from high pressure nearly overhead will allow for ideal radiational cooling tonight. A light freeze is expected north of I-10 with lows staying just north of freezing along and south of the corridor. Tonight's lows will be similar to yesterday, dropping to or below freezing for areas along / north of the I-10 corridor. Tomorrow (Friday) we can expect a warming trend to begin as highs reach into the mid 50s to lower 60s and lows only fall into the low 40s to mid 50s. Our next chances of showers and thunderstorms will be on Saturday as a cold front sweeps across the region. The cold front will do little to cool of highs, however nightly lows will drop back into the 30s and 40s.
/issued 152 PM CST Thu Dec 17 2020/ Surface winds have responded to the surface lee trough and have veered to a more southerly direction. Overnight lows should be mild compared to the past several nights as surface winds will remain out of the south to southwest around 10-15 mph with temps likely staying above freezing over much of the FA. By tomorrow afternoon surface winds will become more westerly as an upper level trough approaches from the west. Surface ridging will quickly shift east by Saturday afternoon meaning a rapid return to light downslope winds. Highs will be near average, mostly in the lower to middle 50s Saturday afternoon.
1038 PM EST Thu Dec 17 2020 High pressure will build over the area through Friday.
1011 PM EST Thu Dec 17 2020 Cold air will linger in the wake of the snow storm with high pressure providing tranquil conditions into the weekend. Readings in the low single digits are likely to the east, especially in the Catksills. High pressure takes control of the pattern Friday into the weekend with no significant wx expected. Warmer air works in for Saturday as the ridge moves eastward and we see a shift to southwesterly flow. Highs come in a few degrees warmer than on Friday, generally in the lower to mid 30s.
Will mention some patchy freezing fog possible (temps in the low to mid 20s mostly) in the grids and continue to monitor through the early morning hours. Highs are expected to recover to the low to mid 40s in most spots, with upper 30s likely still holding on in the far NE. Clouds and shower chances will increase through the day Saturday ahead of an approaching cold front from the west.
Under an extremely positively titled H500 trof axis, the frnt will enter from the N/W, but lkly wash out during the day Sat.
(This evening through Friday) The mid/upper trough, currently centered near Idaho and Nevada, is expected to cross the Rockies and reach the plains late Friday. Meanwhile, a LLJ is prog'd to develop over KS and the OK/TX panhandles tonight as cyclogenesis begins over the high plains. The upper jet streak located along the southern/leeward side of the app FM190400 22005G10KT P6SM BKN002=roaching trough will transport thick cirrus into our area tonight and tomorrow. Some midlevel clouds are expected to develop over NW OK tomorrow morning, with these clouds translating SE across the CWA during the day as a cold front approaches.
The approaching system will induce pressure falls to our west, tightening the gradient across the region with high pressure to the east. Moisture return ahead of the upper system and associated cold front tonight into Saturday will bring rain/shower chances.
1239 AM EST Fri Dec 18 2020 An upper level trough will move through the area tonight, resulting in considerable clouds and cool temperatures. A ridge of high pressure will build across the region Friday and Saturday bringing dry conditions and seasonably cool temperatures.
904 PM CST Thu Dec 17 2020 Temperatures will return to above normal Friday with breezy south winds and highs back into the lower to mid 40s.
High pressure will build over the region through the upcoming weekend resulting in mild afternoons and cool nights.
1002 PM EST Thu Dec 17 2020 Improving conditions expected across the region tonight as high pressure settles in the wake of our impressive coastal system.
Upper level trough moving across the region this afternoon. Cooler upslope flow into the Cascades and Blues will continue to produce snow showers through evening. Weak upper ridge builds in later tonight and Friday. Another upper trough then moves across the Pacific northwest Fri night with a period of rain, mountain snow and breezy southwest winds. Upper ridge Saturday with mostly cloudy skies and mild temperatures.