Aikyam-Lab/Synoptic-Bench huggingface dataset:
Most inland locations will see freezing overnight temperatures tonight and Saturday night.
1232 PM CST Fri Jan 12 2018 Clouds and light snow persist southwest into far south central, though clouds will continue to push south as Arctic high pressure builds south into the region this afternoon and evening. Used the low temperatures from this morning as the basis for the low temperature forecast for tonight into Saturday morning, lowering temperatures from these observations across the James River Valley where the high is expected to be centered. Widespread temperatures of 20 to 30 below are being reported as of 10 UTC across the northwest and central, with relatively warmer readings of 5 to 15 below southwest with the impacts of cloud cover and light snow that will linger through the morning.
/issued 1115 AM CST Fri Jan 12 2018/ Strong CAA continues across the region this morning, and a colder than previously fcst start to our morning seems likely to add up to cooler max temps for today. Do think that these will eventually clear by late this aftn, but are likely to contribute to cooler max temps as well.
Light south winds will become easterly after 00Z as a weak cold front moves through the area. /issued 345 AM CST Fri Jan 12 2018/ WV imagery shows a deep upper-lvl trough moving thru the MS Valley, leaving the wrn CONUS under NW flow aloft. This warmup will be brief, however, as a cold front backdoors the region overnight, taking temps Sat afternoon to below-normal, especially NE zones.
Upper air analysis from this morning depicted broad troughing off to our east across the southern US with northwesterly flow aloft over south central Texas. At the surface, high pressure has taken hold across Texas, yielding sunny skies across the region. Temperatures today are much cooler than yesterday and below climatological normals. The cooling trend will continue as another surge of cold and dry high pressure comes into our area overnight tonight into early Saturday.
253 PM MST Fri Jan 12 2018 Early afternoon water vapor imagery showed an upstream upper ridge axis along the West Coast and downstream upper trough axis over the MS Valley. Short range model/ensemble guidance is in good agreement this weekend with the upper ridge amplifying from the Great Basin into western Canada, and downstream upper ridge nearly stationary over the eastern half of the CONUS.
The cold front can be detected as a rope cloud on visible satellite imagery extending SWWD from just west of Macon to near Pensacola at 18z. Skies will remain cloudy through the overnight period at most locations but with the strong cold air advection, temperatures will drop into the lower 30s northwest to the upper 30s southeast. Wind chill values will drop into the lower 20s northwest to lower 30s southeast.
1209 PM CST Fri Jan 12 2018 High pressure continues to build into the Northern Plains.
An upper level ridge will continue to build along the west coast of the U. The coverages of showers will gradually decrease through tonight as the main moisture track slowly shifts north with the building of the ridge.
339 PM EST Fri Jan 12 2018 Low pressure will bring accumulating snow and brisk winds tonight, before moving east.
High temperatures will mainly be in the lower to middle 20s. Deep upper trough was edging toward the Mississippi River early this morning. Surface obs and radar mosaics continue to indicate some sleet mixing in with the snow at times, though the freezing rain reports have been diminishing some. This trend will continue through sunrise, then the precipitation will start to get pushed east as the trough approaches.
1225 PM EST Fri Jan 12 2018 SHRA are forecast through the evening across South Florida, ahead of a cold front that is forecast to move across the area tonight. The approaching cold front looks to move through South Florida tonight, and should be exiting in the pre-dawn hours.
203 PM MST Fri Jan 12 2018 Cold north northwest flow behind the main low pressure trough will keep areas of light snow in the north and west, mainly in the mountains tonight.
The cold front has just passed I-65 including Huntsville. The impacts of freezing rain will be more limited as well. The upper trough will swing east of the forecast area during the evening hours. Unfortunately, temperatures will not warm up too much during the day on Saturday, with highs only reaching into the lower 30s. As most of the area remains below freezing through the day, any travel problems from today may linger into Saturday.
242 PM EST Fri Jan 12 2018 A southern stream low pressure system moves northeast across the region into Saturday.
An area of low pressure over Tennessee will push northeast across far southeast Kentucky tonight associated with this wave. We do lose ice for a short time this evening under the dry slot, so we could see a period of freezing drizzle as temperatures drop to or just below freezing. Ice will be quickly reintroduced into the low level clouds later this evening as the low levels cool off rapidly. An overall cold period is in store, with an eastern North American trough dominating our weather until late in the week.
This along with sunny skies should result in afternoon temperatures about 5-10 degrees warmer today than what we saw yesterday, especially across the western half of the CWA. This warmup will be short-lived with another cold front expected early Saturday morning, knocking high temperatures back down into the 40s and 50s.
900 AM PST Fri Jan 12 2018 High pressure aloft will bring warm and dry weather through the long weekend.
An area of low pressure over Tennessee will push northeast across far southeast Kentucky tonight associated with this wave. We do lose ice for a short time this evening under the dry slot, so we could see a period of freezing drizzle as temperatures drop to or just below freezing. Ice will be quickly reintroduced into the low level clouds later this evening as the low levels cool off rapidly.
250 PM CST Fri Jan 12 2018 Temperatures are now below freezing across just about the entire mid state. Values range from near 20 west, to the lower 30s Plateau.
258 PM EST Fri Jan 12 2018 REST OF TODAY AND TONIGHT: A low pressure system is working its way across the SE CONUS with a cold front draped to its south. Southerly wind flow has increased the low level moisture across South Florida allowing scattered showers and a few storms to develop ahead of the approaching cold front. Showers will continue throughout this evening and into tonight before the cold front passes through the area. SHORT TERM /THIS WEEKEND/: After the cold front moves through the region early Saturday morning the winds will shift northerly and cold air advection will move down the peninsula.
The warm conveyor belt with light to moderate rain will be pushing across our eastern half over the next few hours, while strong cold advection arrives behind a cold front, which is located near I-75. Fortunately, precip behind the front where temps fall below freezing is very light thanks to the dry slot aloft. With the rapid temperature drop tonight into the 20s, any lingering wet spots on roads could freeze and create patchy black ice Saturday morning, and into the afternoon for northern sections that will remain below freezing and mostly cloudy.
340 PM CST Fri Jan 12 2018 A chilly but sunny (or getting there) afternoon is ongoing across the forecast area in the wake of the cold front which crossed the region last night as a 1043 mb high centered over the nrn High Plains builds swd into the wrn Gulf region. The initial portion of the forecast remains rather quiet as lingering troffing over the ern CONUS keeps the area in a mainly dry nwrly flow aloft, which the Canadian high gradually shifts ewd. With the core of the high centered just to our northeast by tomorrow evening, tomorrow night looks to be the coldest night of the short-term with readings ranging from around 30 swrn zones to lower/mid 20s nern zones.
Areas of light snow and clouds over my southwest and far south central continues to shrink in coverage as the mid level wave starts to exit southeast and as strong Arctic high pressure builds south into the Northern Plains.
1145 AM CST Fri Jan 12 2018 Cold front has passed the area and northwest winds continue over the state. Today Through Saturday Night Radar trends indicate a weakening trend ongoing across south Arkansas where the center of the upper trough is now passing through. By mid morning the trough axis will be east of our forecast area and precipitation should rapidly come to an end. However, this could be too optimistic, especially in those places that receive a decent amount of sleet and/or freezing rain. Northerly winds will continue to pump cold air in from the north as high pressure is anchored over the upper midwest.
335 PM EST Fri Jan 12 2018 A mid-upper level trough pivoting northeast through Alabama has driven a cold front into the southeastern Gulf of Mexico. Temperatures are rain cooled into the lower 70s, and skies are mostly cloudy.
A weak trough is also producing clouds in southern Harney and Malheur Counties but they should decrease this afternoon as the trough moves southeast out of our area. The main feature this weekend will be strengthening upper ridge over the western US, resulting in an inversion in the valleys with patches of fog in the late-night and morning hours.
Temperatures have been steadily falling behind the cold front that moved through this morning. There is still some light freezing drizzle occuring over the I-65 corridor and this may continue off and on into the early afternoon. The Nashville area should see mostly snow by 20z and CSV's transition from rain to freezing rain and snow will be a little later, from 21 to 00z.
Temperatures are expected to fall into the lower 20s areawide by daybreak Saturday, with a few readings in the upper teens possible. A backdoor cold front will move through the area on Saturday. The front will be dry and winds will be light but temperatures will be cooler. Expect sunny skies, with afternoon highs ranging from the lower 40s north, to the upper 40s south.
With low temperatures cooling to near freezing there could be a few places that freeze up causing slick spots.
VFR TAFs as high pressure continues to spread over the area, and with mid level ridging upstream. /issued 350 AM CST Fri Jan 12 2018/ SHORT TERM (Today through Saturday): Winds have decreased across deep south Texas this morning as high pressure continues to spread out over the area. Cooler and drier weather can be expected for today with high temperatures in the 60s and sunny skies.
915 AM PST Fri Jan 12 2018 High pressure aloft will support fair skies with well above normal temperatures this weekend.
1232 PM EST Fri Jan 12 2018 A cold front coupled with waves of low pressure will push through today, bringing a wintry mix of precipitation, changing to snow by tonight as much colder air filters in.
A weak short wave trough will move southeast across north and east Texas through Saturday, but nothing will come of it locally, though a bit of reinforcing plains high pressure will filter south at the sfc. Temperatures will be cooler than normal, running 5 to 10 degrees below normal.
Maliawco A back door cold front sits over Northeast Montana early this morning. Upper ridge builds into Montana today and moves into Eastern Montana on Thursday. This will bring dry and warmer weather into the area on Thursday.
1153 AM EDT Wed May 10 2017 Cooler than normal temperatures will continue into the weekend.
1018 AM EDT Wed May 10 2017 High pressure will prevail through Thursday night as a stationary front remains to the north.
625 AM CDT Wed May 10 2017 To winds leading up to and following the cold frontal passage.
609 AM CDT Wed May 10 2017 The nearly vertically stacked upper low situated over southeast Arizona and northern Mexico has moved quite little in the past 24 hours, much less progressive than the numerical models were indicating for today.
Otherwise, some clouds have developed in the vicinity of the cold front that is settling through the area. A large cool high pressure system north of this front was centered over central Canada. The cold front is forecast to continue moving south into South Dakota later this morning. Winds should be mainly northerly with the cooler air filtering in. The high pressure center is forecast to move southeast towards the Red River Valley of Manitoba. Tonight the high continues moving southeast into the ND/MN border area. A cool night for eastern North Dakota with lows in the 30s, while western ND should see temperatures in the lower 40s for overnight lows. A large upper level low off the west coast Thursday continues to deepen and builds an upper level ridge over the Rockies.
Dry and mild conditions are forecast tonight, with lows cooling into the lower 60s with light winds. The above noted upper low to our SW will slowly approach the area while on a weakening trend. Stayed with highs in the mid 80s (maybe a couple of degrees cooler) due to increased clouds and moisture.
High pressure in the Gulf of Mexico will keep winds generally light today although an afternoon sea breeze will perhaps up to 15 knots but usually less.
The upper low across eastern Arizona this morning will continue east across the southern Rockies today, keeping unsettled weather in place across southern and eastern Utah.
502 AM MDT Wed May 10 2017 Current surface map shows axis of high pressure across the western Dakotas. Rain ends this morning across south central South Dakota as upper trof moves east of the forecast area.
645 AM CDT Wed May 10 2017 Surface and upper-level high pressure to shift east allowing for south winds around 10 knots with higher gusts during the afternoon. /issued 625 AM CDT Wed May 10 2017/ To winds leading up to and following the cold frontal passage.
733 AM EDT Wed May 10 2017 High pressure will maintain dry weather today. Areawide rain chance return Thursday with advancing low pressure. That front is progged to be shunted eastward as low pressure digs toward the Western Great Lakes tonight. Warm advection/isentropic lift on the van of that system will support average temperature as well as increasing precip chances, while the systems weak cold front generates additional precip with a Thursday night encroachment.
Previous forecast for severe thunderstorm potential seems on track with the highest threat being across southwest Oklahoma and western north Texas later this afternoon and into the evening. Additional showers and thunderstorms are expected to develop by at least Thursday afternoon as a cold front begins to push across western and northern Oklahoma.
Dry conditions with much warmer temperatures will prevail Thursday into this weekend.
Probably biggest change is the winds in the lowest 300 mb. This is warming the lower levels. /issued 312 AM CDT Wed May 10 2017/ At the surface, high pressure centered from Florida to Louisiana with low pressure over southeast New Mexico. Aloft, ridging extends from Louisiana northward to Iowa with an upper low over southeast Arizona.
1248 PM EDT Wed May 10 2017 Aviation Low pressure tracking just south of Michigan will bring a round of rain tonight into early Thursday. The highest amounts, near one half inch, are forecast south of Interstate 96. Departure of that old upper low to our east has allowed for a more active zonal flow pattern to take shape. Now we are more under the influence of another upper low to our north, over central Canada. Yet another closed upper low, now over Arizona, is progged to slowly weaken as it moves east the next few days. Believe tstms will be mostly south of our area closer to the sfc warm front.
713 AM CDT Wed May 10 2017 Latest water vapor imagery shows the circulation of a closed low just south southwest of the Four Corners region and a ridge downstream extending from the western Gulf Coast to the Middle Mississippi Valley. Meanwhile, a short wave trough in the Central High Plains is lifting northeastward wherein large scale forcing for ascent from the wave coupled with low-level warm advection across NEB is helping sustain convection in the region. Three hour precip totals across western NEB as of 3 AM CDT showed the highest reading at KLBF, 0. Upper low will be accelerating eastward across southern KS Thursday.
Some mid-upper level moisture can be seen pushing into the Pacific Northwest coastline out ahead of the next upper level Low that will begin impacting the area Thursday morning. An upper level ridge axis that passed over the area Tue night will give way to an incoming trough over the short term. The trough is well off the coast at this time, but will near the coast Thu afternoon. Southwest flow aloft will bring warmer and eventually more moist air into the region. We will see high temperatures in the lower to mid 80s in most of the lower elevations today, increasing to mid 80s tomorrow.
423 AM MST Wed May 10 2017 A strong low pressure system will move slowly northeastward out of Arizona today.
Continued cool today, then a bit warmer for the balance of the week with better clearing under weak high pressure aloft. Stronger onshore flow and a possible return of the coastal eddy this weekend could bring more low clouds and cooler weather as another Pacific trough pushes onshore. This will allow max temps in the lower deserts to peak about ten degrees F higher than yesterday. Our old friend the cutoff low pressure system now in Arizona will weaken as it moves east today. There is low level moisture in the lower desert acting much like a deep marine layer over there.
/Issued 400 AM EDT Wed May 10 2017/ A mid/upper level ridge is moving overhead through the short-term, eventually getting undercut by an approaching trough from the west.
Rain chances will be limited to Mohave County today with dry and warmer weather returning on Thursday and continuing through the weekend.
Otherwise a dry and warm day is in store for our cwa as strong ridge aloft builds in from the west. We will move into a dry period and mostly stable period over the short term as high pressure builds over the Rockies and high plains.
1112 AM EDT Wed May 10 2017 Update Low pressure tracking just south of Michigan will bring a round of rain tonight into early Thursday. The highest amounts, near one half inch, are forecast south of Interstate 96. Departure of that old upper low to our east has allowed for a more active zonal flow pattern to take shape. Now we are more under the influence of another upper low to our north, over central Canada. Yet another closed upper low, now over Arizona, is progged to slowly weaken as it moves east the next few days. Believe tstms will be mostly south of our area closer to the sfc warm front.
Area temperatures are currently about 5 to 8 degrees cooler than this time yesterday, particularly from Davis westward through the Delta. Those areas will experience cooling as well as upper level ridging shifts eastward and a cooler trough moves in.
1239 PM EDT Wed May 10 2017 High pressure northeast of the local area will retreat across eastern Canada.
736 AM EDT Wed May 10 2017 Cooler than normal temperatures will continue into the weekend.
1013 AM EDT Wed May 10 2017 High pressure will maintain dry weather today. Areawide rain chance return Thursday with advancing low pressure. That front is progged to be shunted eastward as low pressure digs toward the Western Great Lakes tonight. Warm advection/isentropic lift on the van of that system will support average temperature as well as increasing precip chances, while the systems weak cold front generates additional precip with a Thursday night encroachment.
NEAR RECORD HIGHS AND DANGEROUS FIRE WEATHER CONDITIONS THROUGH No change in ongoing forecast as High pressure ridge just SW of the region over the NE Gomex will continue dry and hot NW flow across all of NE FL and SE GA with Sunny and Hazy/Smoky conditions. Near record Highs in the lower/middle 90s expected with a weak Atlc Coast Sea Breeze pushing just inland from the coast to about the I-95 corridor. Locally near the West Mims fire the dense smoke across S Charlton/W Nassau should disperse enough to allow the dense smoke advisory to expire and will likely re- issue SPS for general Smoky conditions across the JAX metro area as the morning JAX sounding showed NW flow in the lowest 1km that should push the Smoke towards the SE across most of the city.
With deep layer ridging over the area, we remain on track this morning for a quick warm up under sunny skies. Temperatures will get into the low 90s over inland portions of our area, staying in the 80s along the immediate coastline.
735 AM EDT Wed May 10 2017 Aviation Low pressure tracking just south of Michigan will bring a round of rain tonight into early Thursday. The highest amounts, near one half inch, are forecast south of Interstate 96. Departure of that old upper low to our east has allowed for a more active zonal flow pattern to take shape. Now we are more under the influence of another upper low to our north, over central Canada. Yet another closed upper low, now over Arizona, is progged to slowly weaken as it moves east the next few days. Believe tstms will be mostly south of our area closer to the sfc warm front.
The upper low across eastern Arizona this morning will continue east across the southern Rockies today.
855 AM MST Wed May 10 2017 A low pressure system will move slowly northeast out of Arizona today.
1155 AM CDT Wed May 10 2017 Current Water Vapor imagery/RAP 500mb analysis showing a mid-level trough moving across WI while radar showing associated showers extending from northeast WI through southwest WI/northeast IA. This is due to fairly steep lower level lapse rates as another mid-level trough swings through the area.
Latest water vapor imagery shows a deep through sagging over the Central Plains with continued ridging over the southern CONUS. Maximum temperatures are still on track to reach the mid 80s along the coasts and up to the low 90s over the western interior. Dewpoints in the lower 60s will allow for another comfortable day.
/issued 513 AM CDT Wed May 10 2017/ (Today and Tonight) A vigorous upper low is currently over eastern Arizona early this morning per latest Sat water vapor imagery. The low will lift northeast across New Mexico today and into the northern Texas Panhandle by daybreak Thursday. As the upper low lifts northeast, height falls and associated large scale ascent will spread east across west Texas this evening, along with increasing winds aloft associated with a 110 knot jet streak.
Most locations should max out in the low to mid 80s. Main short-term weather player is the sfc warm front currently draped across central IL into southern IN and paralleling the Ohio River where it separates Ohio from northern/eastern Kentucky.
817 AM EDT Wed May 10 2017 An upper level ridge over the MS River Valley will slowly build east across the area through Thursday.
Most areas should warm into the low to middle 80s this afternoon. Currently, high pressure is centered over the northern Gulf of Mexico with a nearly stationary boundary extending from northern Kentucky across northern Missouri and into southeast Colorado. By tonight, the boundary will start to push south as a cold front. Temperatures will remain mild with lows Thursday morning in the low to mid 60s. The cold front will continue to move south on Thursday which will mean a little better chance of thunderstorms. Temperatures will be a little cooler on Thursday as we will see a few more clouds. Highs on Thursday should be in the lower 80s over most of the forecast area. By Thursday night, the cold front will reach the forecast area making this period the most likely for thunderstorms across the region.