Aikyam-Lab/Synoptic-Bench huggingface dataset:
148 PM MST Fri Feb 25 2022 Late this afternoon tonight, the upper level trough axis will extend from northeast WY into northern UT at 00z, with the left entrance region of the upper level jet over southeastern CO. The high resolution models still show a couple of weak bands developing over the north central mountains this afternoon, then weakening into the early evening. We are still just looking for snowfall accumulations around an inch in the high country and mainly less than one inch in the southern foothills and Palmer Divide. By Saturday afternoon, the trough will shift to the east of CO with a dry and subsident northerly flow aloft over the forecast area. Cooler than normal but significantly warmer than this past week.
Tonight through Saturday, a cold front/sfc pressure trough will be moving into the Northern Plains.
242 PM EST Fri Feb 25 2022 Weather Impacts: - Decreasing Cloudiness - Slight warming trend through Saturday Surface analysis late this morning shows high pressure in place over eastern NB and eastern KS. Yesterdays low pressure system has departed to New England. The lower level stratus deck is expected to begin to clear this evening as daytime heating is lost. Thus will trend lows in to the lower teens. Only a slight warming trend will be expected on Saturday and Saturday night as slightly warmer air arrives on W-SW winds. will trend highs and lows slightly warmer than the NBM. High pressure over the plains states will be gradually building across the TAF sites through the period. Forecast soundings show saturation within the lower levels this afternoon and early evening. As the high builds across Indiana.
It's a cloudy and cool afternoon across much of Central Alabama with the cold front now situated over far southeastern Alabama. North-northwesterly surface winds are providing cooler air to our northern counties and there will be another noticeable temperature gradient. High pressure centers over the Midwest and Ohio Valley overnight. Lows will range from the lower 30s northwest to mid 40s southeast. A positively tilted upper-level trough will pass across the Central CONUS tomorrow afternoon and combine with moist low-level WAA over the ArkLaTex.
Patchy freezing fog and light snow are possible along the east central and southeast New Mexico border with Texas this morning. Otherwise it will be partly to mostly sunny and warmer today with afternoon breezes over the east. Most central and western areas will be 5 to 15 degrees warmer than yesterday despite high clouds moving overhead. Low clouds and freezing fog over west Texas has been slowly expanding westward with time along a weak wind shift/frontal boundary, and should it move into far eastern NM, daytime warming will be slow to commence. An positively tilted upper level trough will shift over NM late tonight into Saturday. Though no moisture is expected, warming will be halted as Pacific and backdoor cold fronts push through the area.
1226 PM EST Fri Feb 25 2022 Low pressure will move well east of the region today. High pressure will build in tonight through Saturday night.
Despite the fresh snow cover, temperatures finally return to near to slightly above normal for Saturday as an upper level ridge moves into the Northern Plains. Some slight enhancement along the Buffalo Ridge is possible and will lead to patchy blowing snow in southwest Minnesota. Stay weather aware as blowing snow can affect driving conditions! Overnight low temperatures will be a touch warmer, falling to the the low to mid teens across the region.
1139 AM CST Fri Feb 25 2022 Chilly today but trending warmer over the weekend.
Cold front continues to push east this morning with rain showers moving out as well. CDG Chattanooga Airport, TN 35 51 41 53 34 / 0 20 70 60 10 Knoxville McGhee Tyson Airport, TN 33 50 38 51 31 / 0 10 60 50 0 Oak Ridge, TN 32 50 37 53 31 / 10 10 60 40 0 Tri Cities Airport, TN 31 49 35 51 29 / 10 10 40 40 0.
1039 AM MST Fri Feb 25 2022 At the beginning of the short term period, current RAP analysis depicts the CWA having a westerly flow aloft being underneath the base of a trough. Going into the Friday evening hours, models show the flow turning west- southwesterly as the axis of the trough tilts in a positive direction. On Saturday, forecast models show the west-southwesterly flow continuing during the day before the axis of the trough passes over the CWA around midnight. The warming trend looks to continue into Saturday as well with highs in ranging from around 40 degrees to around 50 degrees followed by overnight lows in the lower to upper teens.
Temperatures are hanging around in the upper 30s to mid 40s across the area, and will drop into the low 30s for lows overnight tonight. We're transitioning out of the persistent pattern we've had for the last week and a half, with the troughing over the west and the Tennessee Valley in the path of the storm track.
241 PM EST Fri Feb 25 2022 Widespread stratus currently blankets much of the Ohio and Tennessee Valleys in the wake of a cold front. Colder air is being pumped into the region ahead of a 1040mb high pressure system currently over the NE/IA borders. Temperatures at this hour are in the low to mid 30s in many places thanks to cloud cover and strong CAA in the wake of the front. Clouds will stick around through most of the overnight hours, but winds will begin to slacken some as Canadian high pressure nudges in from the west. The cloud cover along with light northerly winds will help to keep temperatures on the cooler side, but still a little warmer compared to today, with highs in the 40s. High pressure will dominate.
A series of weak and dry troughs will bring bouts of northeast winds to the area over the next several days, occasionally interrupting what will otherwise be a fair weather pattern, with a slow daytime warming trend, but continued cold nights.
132 PM MST Fri Feb 25 2022 AFTERNOON UPDATE: Today through Saturday night: Slow warming trend expected with dry weather conditions as the arctic airmass shallows out and ridge to the west pushes in gaining influence.
High pressure will remain over the Florida Peninsula today keep the weather dry over the region along with a light easterly wind flow. The temperatures will again be in the mid to upper 80s over most areas this afternoon which will be near record highs for this time of year, except for the east coast metro areas where the highs will only be around 80 degrees. Therefore, the High Risk of rip currents will continue along the east coast beaches of South Florida. The ridge will keep generally easterly flow in place, which will help in alleviating a little the warm temps along coastal locations in the afternoon hours, but still expecting mid to upper 80s over most of SoFlo, except east coast metro areas where they will be around 80.
450 PM EST Fri Feb 25 2022 21Z sfc analysis shows high pressure building into the state from the northwest. Some cyclonic flow does remain in the far east as a wave of low pressure departs. On account of this, the low clouds still holding on over our eastern areas have been dropping some flurries as they drift through. As the high pushes in, the winds have been mainly northwest at 5 to 10 mph bringing in colder air with readings not able to get out of the 30s this afternoon.
450 PM MST Fri Feb 25 2022 The rebound in temperatures will continue through the weekend as warmer air continues to work its way into the area. Otherwise, dry conditions will continue through the weekend Pleasant weather continues today for most of the area as a high pressure system remains centered just south of West Yellowstone. These winds will continue through the weekend, so blowing snow will remain possible until temperatures warm up above freezing on Saturday. Speaking of this warm up, warmer air from the Pacific will downslope into the area over the weekend as an upper level ridge builds into the area, which will bring the return of above average temperatures to the area.
715 PM EST Fri Feb 25 2022 Low pressure tracking out of the Ohio Valley will push a cold front across the East today and this will be followed by colder air and dry high pressure for tonight and Saturday.
We're transitioning out of the persistent pattern we've had for the last week and a half, with the troughing over the west and the Tennessee Valley in the path of the storm track.
Likewise, a batch of altocu is expected to do so on Saturday across central Kansas, associated with the upper trof axis shearing eastward from the northern Plains/central Rockies into the Midwest and central Plains.
A series of weak and dry troughs will bring bouts of northeast winds to the area over the next several days, occasionally interrupting what will otherwise be a fair weather pattern, with a slow daytime warming trend, but continued cold nights. A weak trough of low pressure will bring cool and dry weather on Saturday, with northeast breezes and marginal to fair ventilation.
Some increase in rain chances across the Delta, particularly in extreme SE Arkansas, might support a very brief period of some brief freezing drizzle around or just after daybreak. However, such shallow moisture depth & only being right around freezing limits confidence of development &/or impacts. With cold air & strong high pressure building in, lows will fall into the low 40s SE to mid-upper 30s elsewhere. Highs will only fall into the low 40s along & NW of the Natchez Trace to low 60s in the SE.
Chilly surface ridging remains intact through Saturday night with no meaningful changes in MSLP values beyond the normal diurnal variations. High temps on Saturday were cooled off to follow suit with the lower CONSSHORT numbers that have outperformed the NBM in this pattern. Saturday night, a mostly sheared trough enters W TX with some subtle PVA evident as far south as our region. Isentropic lift shifts farther north closer to the trough with only modest ascent locally, so rain chances were kept to mostly 30-40 PoPs which may still be overdone.
747 PM CST Fri Feb 25 2022 Cool high pressure will settle into central Illinois tonight.
This increase in moisture could allow for a few patchy areas of light drizzle/freezing drizzle to be possible in far Southeast Oklahoma late tonight as warm advection increases and interacts with weak elevated frontogenetic forcing. Temperatures overnight should be slightly warmer with the increasing cloud cover and low level moisture.
645 PM EST Fri Feb 25 2022 A weak cold front will shift to the coast tonight. Much cooler air will return behind the cold front with temperatures 20 to 25 degrees cooler for the weekend.
Temperatures range upper 20s over northeast Arkansas and the Missouri Bootheel to near freezing along the I-40 corridor. Above freezing temperatures can be found across all of north Mississippi. Expect lows near freezing over north Mississippi with mid to upper 20s north. This wave will take a southeast track through the Lower Mississippi Valley and place the Mid-South in the right exit region of a 130 knot jet.
414 PM EST Fri Feb 25 2022 Dry weather returns for later tonight and Saturday with building high pressure.
A weak and dry cold front is forecast to move through western and central areas Saturday afternoon with northwest breezes developing at KFMN, KGUP, KAEG and KABQ. Breezy conditions will develop most areas Saturday afternoon as a weak and dry cold front moves through.
322 PM CST Fri Feb 25 2022 Summary: Warmer tomorrow before a series of clippers move through the region for much of the remainder of the period bringing low chances for snow and continued below normal temperatures. High pressure centered over the Missouri Valley was bringing mostly sunny and dry conditions to the Northland this afternoon. As the ridge axis moves overhead this evening, winds will turn southwesterly and increase helping to bring in warmer air ahead of the next clipper.
Expect diminishing cloud cover tonight as a low pressure trough moves east of the region.
412 PM MST Fri Feb 25 2022 A broad, positively tilted trough covers much of the CONUS. Surface map shows high pressure to our east and west, with westerly winds across our CWA. The upper trough will shift eastward tonight, as an upper ridge builds over the western CONUS.
Passing cold front from last night long gone, and is expected to stall across the FL handle. We wont really see anymore direct impacts from this boundary, but will see the effects of a incoming upper trough. This trough is expected to cross the mid-state Sun afternoon. With such a borderline temp structure and really only on the northern fringe where moisture is most limited, any freezing/frozen pcpn that develops will be short lived and likely trace amounts.
We have made it through the latest trough of the high temperature wave, and look to start climbing toward the next peak. However, embedded in that general ascending trend is the daily oscillations between relatively mild highs and subfreezing lows.
243 PM MST Fri Feb 25 2022 The rebound in temperatures will continue through the weekend as warmer air continues to work its way into the area. Otherwise, dry conditions will continue through the weekend Pleasant weather continues today for most of the area as a high pressure system remains centered just south of West Yellowstone. These winds will continue through the weekend, so blowing snow will remain possible until temperatures warm up above freezing on Saturday. Speaking of this warm up, warmer air from the Pacific will downslope into the area over the weekend as an upper level ridge builds into the area, which will bring the return of above average temperatures to the area.
250 PM MST Fri Feb 25 2022 Current GOES-16 moisture channel imagery shows a large, positively tilted trough sweeping into eastern Utah and western Colorado from the northwest this afternoon. All of this to say that it's no surprise that streets of cumulus clouds and isolated to scattered snow showers and flurries have developed along the high terrain on either side of I-70 and northward into the northern Colorado mountains. With the loss of daytime heating and the trough exiting to our east, snow showers and flurries will taper off fairly quickly overnight.
744 PM EST Fri Feb 25 2022 High pressure will nose into the Commonwealth this weekend, to bring generally dry weather and seasonable temperatures.
Given the clear skies and light winds, along with fresh snow pack over the high terrain, another very cold night is expected.
/Updated at 0630 PM CST Fri Feb 25 2022/ The earlier cold front has now exited Central AL with northerly winds in place area wide. Rain associated with an approaching upper level trough will remain west of the forecast area on Saturday, but rain chances will increase quickly Saturday night. It's a cloudy and cool afternoon across much of Central Alabama with the cold front now situated over far southeastern Alabama. North-northwesterly surface winds are providing cooler air to our northern counties and there will be another noticeable temperature gradient. High pressure centers over the Midwest and Ohio Valley overnight. Lows will range from the lower 30s northwest to mid 40s southeast. A positively tilted upper-level trough will pass across the Central CONUS tomorrow afternoon and combine with moist low-level WAA over the ArkLaTex.
715 PM EST Fri Feb 25 2022 Strong high pressure to the west will build in through Saturday.
201 PM MST Fri Feb 25 2022 A broad, positively tilted trough covers much of the CONUS. Surface map shows high pressure to our east and west, with westerly winds across our CWA. The upper trough will shift eastward tonight, as an upper ridge builds over the western CONUS.
Weather Impacts: - Decreasing Cloudiness - Slight warming trend through Saturday Surface analysis late this morning shows high pressure in place over eastern NB and eastern KS. Yesterdays low pressure system has departed to New England. The lower level stratus deck is expected to begin to clear this evening as daytime heating is lost. Thus will trend lows in to the lower teens. Only a slight warming trend will be expected on Saturday and Saturday night as slightly warmer air arrives on W-SW winds. will trend highs and lows slightly warmer than the NBM.
233 PM PST Fri Feb 25 2022 Cool and dry through Saturday with widespread freezing low temperatures in the early morning hours. Temperatures trend warmer this weekend.
Bulk of later periods will be dominated by weak short wave troughs dropping through western Great Lakes in flow. Mean upper ridge will shift from western CONUS into our area, but then shifts to a more active southwest flow pattern. High pressure will provide mainly clear skies through the TAF period. As this high continues to move southeast of the area on Saturday and the surface pressure gradient gradually tightens ahead of an approaching cold front, the sustained southwest wind speeds will increase from 5 to 10 knots to 10 to 20 knots.
426 PM MST Fri Feb 25 2022 Current GOES-16 moisture channel imagery shows a large, positively tilted trough sweeping into eastern Utah and western Colorado from the northwest this afternoon. All of this to say that it's no surprise that streets of cumulus clouds and isolated to scattered snow showers and flurries have developed along the high terrain on either side of I-70 and northward into the northern Colorado mountains. With the loss of daytime heating and the trough exiting to our east, snow showers and flurries will taper off fairly quickly overnight.
558 PM CST Fri Feb 25 2022 Summary: Warmer tomorrow before a series of clippers move through the region for much of the remainder of the period bringing low chances for snow and continued below normal temperatures. High pressure centered over the Missouri Valley was bringing mostly sunny and dry conditions to the Northland this afternoon. As the ridge axis moves overhead this evening, winds will turn southwesterly and increase helping to bring in warmer air ahead of the next clipper.
243 PM MST Fri Feb 25 2022 Westerly winds were increasing across the area this afternoon as high pressure builds over the region. Developing lee-side troughing will tighten pressure gradients, causing winds to increase further along the western foothills this evening.
549 PM CST Fri Feb 25 2022 (This evening through Saturday) The main concern overnight is the potential for freezing rain/freezing drizzle Saturday morning. With temperatures near to below freezing, light freezing rain or freezing drizzle may develop. At this time, little to no ice accumulations are expected, but minor accumulations are possible, especially on elevated surfaces, along with bridges and overpasses. Temperatures Saturday afternoon are forecast to slowly rise above freezing, with precipitation transitioning to all liquid.
615 PM EST Fri Feb 25 2022 A cold front will pass through this evening bringing a trend towards more normal temperatures.
Flow aloft returns to northwesterly, with low pressure developing to our northeast and southeasterly surface winds picking up. Ahead of the front, there should be a decent amount of sun and warmer air mass to be able to get into the teens to 20s above zero by afternoon. The cold front will come dropping down Saturday afternoon and evening.
935 PM EST Fri Feb 25 2022 Low pressure tracking out of the Ohio Valley will push a cold front across the East today and this will be followed by colder air and dry high pressure for tonight and Saturday.
Water vapor imagery this afternoon continues to feature troughing over the central CONUS with the main jet stream south of forecast area.
214 PM PST Fri Feb 25 2022 Widespread freezing temperatures will occur again in the San Joaquin Valley early Saturday morning. Temperatures dipped below freezing again this morning over most of the San Joaquin Valley, with many locations dropping into the upper 20s. Saturday morning lows are expected to be a degree or so higher than this morning's lows, but still another night/morning of widespread freezing temperatures is likely for the San Joaquin Valley. As the recent cold trough continues to move eastward a Pacific ridge is progged to build into the region and to bring warming temperatures over our area.
625 PM EST Fri Feb 25 2022 Dry weather returns for later tonight and Saturday with building high pressure.
645 PM EST Fri Feb 25 2022 High pressure over the Central Plains is continuing to extend a ridge over the U. The main feature of interest is a low pressure system tracking across the Hudson Bay on Saturday. A cold front dives south across our CWA Saturday night and ushers in the next arctic air mass. Soundings show a brief period of robust snow showers accompanying the cold front passage, especially across the east. These showers could add up to a quick inch with light lake effect snow showers developing for northwest wind snow belts behind the cold front.
Widespread freezing temperatures will occur again in the San Joaquin Valley early Saturday morning. Temperatures dipped below freezing again this morning over most of the San Joaquin Valley, with many locations dropping into the upper 20s. Saturday morning lows are expected to be a degree or so higher than this morning's lows, but still another night/morning of widespread freezing temperatures is likely for the San Joaquin Valley. As the recent cold trough continues to move eastward a Pacific ridge is progged to build into the region and to bring warming temperatures over our area.
High pressure is building into the area at the surface and aloft this afternoon and will bring quiet weather to the area through the weekend. Discussion: High pressure will build into the area at the surface and aloft tonight. High pressure pushes to the southeast into the lower Ohio River Valley during the day on Saturday which will allow the winds to shift to the southwest and bring slightly warmer air into the area. High temperatures will range from the mid 30s along the Highway 20 corridor to the upper 30s south of Interstate 80.
Observations still have elevated winds/wind gusts well beyond the passage of the cold front earlier today and short term CAMs still have it gusting above 20 knots.
304 PM MST Fri Feb 25 2022 High pressure will be the dominant weather feature present across the Northern Rockies through Saturday. The increasingly high sun angle will warm daytime temperatures near to or above freezing for most locations on Saturday.
Banded snow with light accumulations for the Pikes Peak region Elongated east west oriented upper trough will continue to settle southward across CO spreading banded snow into the central mountains and southeast plains. Snow bands have been developing out west along the Continental Divide and these should spread eastward into the late afternoon and evening as the upper trough shifts southeastward bringing a period of QG lift to the region. Some breezy northwest winds will mix down across the higher elevations in the afternoon with gusts to around 25 mph.
Furthermore, widespread overcast skies will greatly inhibit radiative cooling, resulting in low temperatures in the 30s to the north of the I-10 corridor and the low to mid 40s elsewhere. Rain chances will be on the increase overnight and into tomorrow as a weak coastal trough to our southwest pushes towards the SE TX coast.
Widespread stratus currently blankets much of the Ohio and Tennessee Valleys in the wake of a cold front. Colder air is being pumped into the region ahead of a 1040mb high pressure system currently over the NE/IA borders. Temperatures at this hour are in the low to mid 30s in many places thanks to cloud cover and strong CAA in the wake of the front. Clouds will stick around through most of the overnight hours, but winds will begin to slacken some as Canadian high pressure nudges in from the west. The cloud cover along with light northerly winds will help to keep temperatures on the cooler side, but still a little warmer compared to today, with highs in the 40s. High pressure will dominate.
923 PM EST Fri Feb 25 2022 The high pressure ridge axis remains across central FL with a remnant seabreeze diminishing late this evening. Temperatures will remain warmer than normal overnight with lows averaging in the U50s cold spots to L-M60s elsewhere. High pressure continuing over the local waters.