Aikyam-Lab/Synoptic-Bench huggingface dataset:
At 1 pm, temperatures ranged from the low 40s across central WI in the thicker stratus, to the mid 50s to lower 60s in sunshine across southeast MN/northeast IA. For tonight, we'll be watching a mid-level wave of low pressure rotate southeast into the area with some increase in pv-advection and slight uptick in 850-700mb moisture transport. Overnight lows are expected to fall into the lower/mid 30s across central WI in that drier air, to the 40-45 degree range along and west of the Mississippi. That mid-level trough hangs over the area through Friday night for continued clouds but looks like shower chances will be pretty much shoved out of the area by midnight. Intermittent periods of precipitation and dry conditions are expected through the period as upper level troughs swing through the region.
From synopsis: A high pressure cell near Bermuda will exit off to the east overnight. Meanwhile, a strong low pressure center will move up the Ohio Valley, bringing a turn to prevailing southerly breezes across the Keys coastal waters.
Given the low stratus and persistent northeast winds, not expecting dense fog to form at this time. Given the low stratus and persistent northeast winds, not expecting dense fog to form at this time.
Friday will be dry and a few degrees warmer, but will be followed by wet and cool weather again this weekend. High temperatures Friday afternoon will range in the 60s but much cooler near lake Michigan. Nonetheless sys lifts out quickly overnight followed by brief ridging Fri. Upstream cntrl Rockies sw disturbance this aftn will amplify sewd into the mid MS valley late Fri before phasing with nrn stream and wind up a fair deep cyclone through the wrn OH valley this weekend. Otherwise short amplitude ridging follows into the wrn lakes Mon ahead of next amplifying nrn stream disturbance digging into the nrn lakes late Tue. Low pressure system moving into the Ohio Valley will continue to bring light rain showers mainly south of FWA this evening. Rain will move out overnight as weak high pressure follows the low.
Morning lows should dip into the low to mid 50s. /issued 655 PM CDT Thu Apr 23 2020/ Latest GOES water vapor imagery places a closed low across West Tennessee at this hour with an occluded front draped southward. Lingering showers will continue through the evening on the back side of the low. High pressure will build into the region late tonight bringing a brief period of dry conditions.
A cold front should arrive shortly before sunrise switching winds around to the northwest. /issued 231 PM CDT Thu Apr 23 2020/ An outside shot of high based showers and a cold front moving through is the only weather concern for the next 24 hours or so. A surface cyclone will move east across the southern Texas Panhandle overnight. This will drag a cold front through on Friday morning.
A upper level trough from the western Ohio Valley to the northeast coast of Mexico along with a strong surface reflection on the KY/TN border that trails a cold front south and southwest will proceed eastward overnight. Atlantic high pressure currently across FL to the east Gulf slips to the east overnight. Impulses in the approaching upper level trough will support the threat of strong to severe thunderstorms.
/Issued 319 PM EDT Thu Apr 23 2020/ Warm front has struggled to move north from the Florida Panhandle this afternoon. The airmass ahead of the cold front has begun to destabilize with very high CAPES and marginal lapse rates. Storms north of the warm front, in the wedge, will remain elevated with some potential for hail and damaging wind gusts. South of the warm front, damaging wind gusts will be the primary hazard, but a few tornadoes are not out of the question.
/issued 300 PM CDT Thu Apr 23 2020/ Latest GOES water vapor imagery places a closed low across West Tennessee at this hour with an occluded front draped southward. Lingering showers will continue through the evening on the back side of the low. High pressure will build into the region late tonight bringing a brief period of dry conditions.
1000 PM EDT Thu Apr 23 2020 Rain will end tonight as low pressure travels across West Virginia. High pressure and dry air are forecast for Friday.
-Mottice A weak cold front dropped south across eastern Montana today that help spawn isolated-scattered showers with an isolated thunderstorm (over eastern Roosevelt County). Temperatures near normal tomorrow will slowly rise through the period with them about 10 degrees warmer than normal at the end of the period.
Widely scattered convection has developed as expected just ahead of a surface trof/weak cold front across west central Kansas. Otherwise, chances for showers and isolated storms will increase into Friday, in response to the amplifying upper trof across the central Plains/lower Missouri Valley. The relatively cool temperatures aloft, low level moisture and lift under the developing trof will result in scattered to numerous showers/isolated storms. Saturday still looks dry and seasonably mild in the wake of the departing trof.
Scattered rain showers over the lower elevations and snow showers over the mountains are expected overnight into Friday.
A cold front is moving through the area at the moment and switching winds around to the northwest. /issued 231 PM CDT Thu Apr 23 2020/ An outside shot of high based showers and a cold front moving through is the only weather concern for the next 24 hours or so. A surface cyclone will move east across the southern Texas Panhandle overnight. This will drag a cold front through on Friday morning. Highs on Saturday will cool a bit further into the low to mid 70s but low-level flow will start to veer to the south late in the day.
A cold front moving into the region is progged to affect HOB/INK/MAF around 25/00Z, quickly progressing south and west. Zonal flow will bring warm and dry conditions to West Texas A series of upper level troughs will be moving across the northern U.
916 PM PDT Thu Apr 23 2020 A weak disturbance dropping south tonight and Friday will generate some gusty offshore winds ahead of a building ridge over the State this weekend.
This evening through Friday night The weather will continue to be unsettled this afternoon and tonight over most of the area due to a weather system and cold frontal passage.
It gets in here so quickly after tonight's that there isn't any time for return flow to begin, so I don't see much instability, but there is a warm front that develops and moves through the mid-state before the core of the system closes in on the area.
High pressure aloft will build across the Great Basin this weekend.
Afternoon highs will primarily be in the upper 50s to lower 60s, though cooler near Lake Michigan. Low pressure then lifts into the Ohio Valley bringing periods of rain Friday night through Saturday night, along with slightly cooler temperatures. CWA within col between coastal energy transfer of West Virginia cyclone remnants and strong cyclogenesis developing over Texas Panhandle. Given rich low level moisture with 6-7g/km 1000-850mb and light flow providing no impetus for suspect dirty ridge setup with patchy fog potential western CWA in pockets of strong radiational cooling through about 9 AM EDT west with period of stratus with lifting condensation levels in afternoon with a few breaks in the overcast. Ridging over Rockies and intensification of southern tracked system with notable 5H rise/fall couplet on order of 130-140M/12 hours tracking from Southern Plains into the Tennessee Valley.
Otherwise, it will be a cooler day with highs in the lower to mid 60s. It will be a cool night with lows in the lower 40s. Temperatures will be around normal for this time of year, topping out in the lower to mid 60s.
May finally see some clearing work in from the north later today as high pressure strengthens a bit over southern Canada. The trend over the last day or two has been to keep this system farther south, with high pressure pushing more into the area from the north.
Scattered showers and isolated afternoon thunderstorms will continue to spread eastward into the RRV and MN during the day on Saturday as the upper low continues to wobble over the area. With a bit more cloud cover and precip, went a bit cooler for Saturday highs in the 50s to around 60.
Wind shear aloft looks more marginal over eastern Kansas today, however if decent daytime heating can destabilize the low level moist layer(higher CAPE values) combined with colder air aloft spreading into the region.
On Saturday, temperatures remain near normal values for late April as cooler air lingers aloft.
Winds will trend more SE-S around 10 KT Friday as the high moves east, with a few gusts to around 20 KT during the aftn.
402 AM EDT Fri Apr 24 2020 Rain will wrap up this afternoon as a low pressure advances east.
Upper level troughing over the northern Rockies will amplify over the central high plains through the period, with 500mb temperatures cooling to around -21C by Friday morning. In the wake of the associated cold front, temperatures are expected to fall back into the 40s tonight across northwestern Kansas, with the coolest readings near 40 on the higher terrain near the Colorado state line. Highs Friday will be in the lower to mid 60s.
A cold front has pushed to near a Mobile, AL to Brownsville, TX line over the past several hours. The area of high pressure behind the front is centered over East Texas and West Louisiana. An area of low pressure is developing over the central plains ahead of an upper disturbance. Through today and tonight the ridge over the local area will quickly head east. This will place the area between the developing plains low and departing ridge and lift the frontal boundary over the gulf north bound. A few shower and storms may accompany the cold front that will extend south from low, however with moisture being fairly limited convection will be isolated to widely scattered and mainly over East TX. The cold front will be moving off the coast by Saturday morning.
Another low pressure system will be quickly coming out of the plains states bringing yet another round of showers and thunderstorms late tonight into early Saturday ABM.
The cold front and the entire low pressure system is then expected to move through the area this evening. Temperatures will also be on the cool side with highs in the low to mid 60s.
This will drag a cold front south across the area later this morning leading to more northwesterly winds. While today will be slightly cooler it looks like the cooler temperatures will lag the front a bit so that tonight and Saturday will be the coolest period albeit only by a few degrees. /WCI The weekend will kickoff on a fine note as surface ridging traverses the High Plains.
So conditions should be similar to yesterday, except the highest coverage of activity will be east of Billings and perhaps near the Pryors and Big Horns.
Low pressure will then lift into the Ohio Valley bringing periods of rain and cooler temperatures later Friday night through Saturday night. Nonetheless sys lifts out quickly overnight followed by brief ridging Fri. Upstream cntrl Rockies sw disturbance this aftn will amplify sewd into the mid MS valley late Fri before phasing with nrn stream and wind up a fair deep cyclone through the wrn OH valley this weekend. Otherwise short amplitude ridging follows into the wrn lakes Mon ahead of next amplifying nrn stream disturbance digging into the nrn lakes late Tue.
334 AM CDT Fri Apr 24 2020 Looks like the cold front was along the Louisiana coast at 2 AM CDT.
Morning lows should dip into the low to mid 50s. /issued 655 PM CDT Thu Apr 23 2020/ Latest GOES water vapor imagery places a closed low across West Tennessee at this hour with an occluded front draped southward. Lingering showers will continue through the evening on the back side of the low. High pressure will build into the region late tonight bringing a brief period of dry conditions. Some storms have the potential to become severe ahead of the surface boundary as the upper level trough tries to become neutrally to negatively tilted.
This makes room for high pressure over western Tennessee to try and squeeze north into central Kentucky and southern Indiana. This low will shift our north winds around to the southeast, and as pressure gradients intensify, as the system approaches, winds will increase. Lows are expected to drop to the upper 40s in the Bluegrass with the added time for radiative cooling ahead of the cloud cover, but Louisville and areas west will be in the low to mid 50s. This low will steadily drift to the northeast into central KY during the day Saturday, and isentropic lift along 290/295K surfaces will promote widespread shower development for a good part of the day.
154 AM MDT Fri Apr 24 2020 Upper level troughing over the northern Rockies will amplify over the central high plains through the period, with 500mb temperatures cooling to around -21C by Friday morning. In the wake of the associated cold front, temperatures are expected to fall back into the 40s tonight across northwestern Kansas, with the coolest readings near 40 on the higher terrain near the Colorado state line. Highs Friday will be in the lower to mid 60s.
Temperatures are dropping into the lower 30s across the west central.
A NW-SE oriented jet max will propagate through the base of the approaching trough, placing the Mid-South in the left exit region during the overnight hours and enhancing large scale forcing for ascent downstream of the approaching potential vorticity anomaly. Showers and thunderstorms are expected to pivot around the upper low late tonight and Saturday, eventually ending Saturday evening as the trough pulls off to the east. We're expecting a couple of dry days in the wake of this system, albeit it slightly cooler.
Otherwise, showers continue in the post frontal sector as a southwestward extending mid/upper level trough axis swings through.
At the surface an area of low pressure with a trailing cold front is working east across eastern Kentucky with a noticeable wind shift from the south/southeast to the northwest. If this isn't enough, developing southeast flow off the higher terrain late tonight should help to finally erode this cloud cover. Given I expect at least a short period of clearing for most areas, went with a small ridge/valley split with the valleys reaching the low to mid 40s and ridges staying around 50. By Saturday, a vort max rounding the base of an upper level trough in the central plains will eject out across Kentucky. Given the tightening pressure gradient and decent mixing of the low level jet expect gusty winds on Saturday afternoon.
For the most part though, dry surface flow associated with high pressure moving through central Ontario should keep any appreciable precipitation at bay.
Upper level trough will be slow to move eastward Saturday. Large scale ridging will move into the region late Saturday as thermal ridge quickly pushes into the region overnight Saturday.
335 AM EDT Fri Apr 24 2020 Confluent flow aloft and surface ridging beneath it centered over James Bay will keep things quiet today and tonight. On the other hand, light gradient flow plus these warmer temps inland means lakebreeze in the afternoon so areas within a couple miles of the lakes will probably stay in the 40s.
Western Nebraska lies squarely in northwest flow aloft as an upper trough remains anchored over the central and eastern U. Temperatures actually stay around normal values through Saturday, then they jump to start the new week as an upper ridge builds onto the Plains. For max temps, guidance has trended warmer than previous runs. Weak warm air advection begins in western Neb, while north central Neb remains on the edge of the cold upper trough.
However, low level winds were starting to turn slightly more out of the north, and despite lighter wind speeds, were slowly starting to tap into drier lower level air from general high pressure holding firm in Ontario. The low pressure will work off the Atlantic coast today, and nrn Michigan will see a continued gradual/slow tap into drier air from Ontario.
Showers will gradually diminish just before sunrise as the trough axis exits the region.
Temperatures will run 2 to 5 degrees cooler today compared to yesterday in the wake of the departing system, which is a few degrees below average for late April. Daytime heating and lingering moisture should result in isolated showers this afternoon that develop in the higher terrain, and a few thunderstorms will be possible as well. The highest chances look to be in the central and northern Colorado mountains.
A weak upper trough progressing across MN this afternoon could produce scattered diurnal showers, but these should remain mainly north and west of our area before dying out with loss of heating.
Another Cold Front but Dry. Dry conditions will continue, for another 24 hours, and another cold front will push south, across West Central Texas, today. Gusty winds, from the northwest today, will bring drier air into West Central Texas, along with slightly cooler temperatures. Highs today, mainly across the Big Country, will be close to yesterday's highs, but still warmer than usual late April highs. Elsewhere today, high in the lower to mid 90s look likely. Then, as drier and cooler air settles over West Central Texas, expect lows tonight at or a few degrees cooler than usual late April lows.
The winds will turn to the northwest at all sites by this afternoon behind a cold front. Another Cold Front but Dry. Dry conditions will continue, for another 24 hours, and another cold front will push south, across West Central Texas, today. Gusty winds, from the northwest today, will bring drier air into West Central Texas, along with slightly cooler temperatures. Highs today, mainly across the Big Country, will be close to yesterday's highs, but still warmer than usual late April highs. Elsewhere today, high in the lower to mid 90s look likely. Then, as drier and cooler air settles over West Central Texas, expect lows tonight at or a few degrees cooler than usual late April lows.
Temperatures are now expected to reach the low or mid 60s due to a decrease in forecast cloud cover.
This will allow temperatures to top out in the lower 80s central and south with the upper 70s across the north. However, this quick moving system will be east of the region by noon, and a cooler, drier airmass will begin to filter into the region through the day.
A weak cold front will slide south into the region from Canada this afternoon. Relatively dry air should allow tonights lows to fall to the lower 30s southwest to the 40s east.
Upper ridging over the western U. This will result in large scale subsidence and thus dry weather conditions along with warmer temperatures.
However, this quick moving system will be east of the region by noon, and a cooler, drier airmass will begin to filter into the region through the day.
506 AM EDT Fri Apr 24 2020 Mean layer ridging is displaced well to the east compared to several days ago, now centered over eastern Cuba and Jamaica. Temperatures across the islands are in the lower 80s with dewpoints in the upper 70s. The next seven days will feature two more weak cold fronts, which is astounding and welcome for late April.
809 AM EDT Fri Apr 24 2020 Rain will wrap up this afternoon as a low pressure advances east.
Slow moving cold front will press southward across SE GA this evening, with moisture pooling ahead of the boundary causing low cloud restrictions of MVFR to IFR across NE FL terminals.
227 AM PDT Fri Apr 24 2020 Hot weather will result from high pressure aloft and some offshore winds today. Flow turns onshore this weekend for slightly cooler weather.
scattered showers and isolated thunderstorms will be possible today as an upper level trough moves southeast through the area. High temperatures will be much cooler compared to the past few days with readings in the mid 50s to mid 60s. Dry conditions are expected tonight with low temperatures in the low to upper 30s. High temperatures approach normal levels for this time of year with readings in the low to upper 60s.
This will keep the threat for showers and cooler temperatures today. QG fields showing increasing subsident flow on the back side of the weak trof by later this morning. Temperatures will be cooler today behind the waves with readings cooling back into the 50s across the plains. Temperatures will be warmer than today, as skies clear in the afternoon and allow for the late April sun to work.
High pressure will build across the Great Basin this weekend. produce a few showers across the higher terrain of northern Utah mainly the western Uintas and the Bear River Range near the Utah/Idaho border. Expect upper level ridging to build into the Great Basin by late Friday.
1250 PM CDT Fri Apr 24 2020 Large area of scattered showers/storms in line with the upper trough / sfc cold front is just beginning to cross the state border into far western ND. A weak cold front will slide south into the region from Canada this afternoon. Relatively dry air should allow tonights lows to fall to the lower 30s southwest to the 40s east.
As such, northerly winds today will gradually turn southerly again in the wake of the high and in advance of the next system. Moist, southerly flow in addition to increasing cloud cover will keep overnight lows slightly warmer than last night. Highs on Saturday will also be warmer than today with many locations topping out in the mid to upper 80s.
(This evening through Saturday) An upper trough currently across the Central High Plains will be digging into Oklahoma in the next few hours and through the evening hours, providing the upper support for storms to begin firing up soon across portions of northcentral into eastcentral Oklahoma. Being on the back side of the cold front, tonight should be dry and a little bit cooler and breezy as we tap into air originating from the Central High Plains.
In fact, a cold front will continue passing through the region bringing some relief. Cooler conditions will move in for Saturday as highs will be in the mid 70s to lower 80s.
1134 AM EDT Fri Apr 24 2020 Lingering light rain will end by this afternoon as low pressure advances eastward.
327 PM EDT Fri Apr 24 2020 A cold front is currently laid out across North Florida.
Saturday Night Through Friday Canadian high pressure will bring mainly dry conditioons through the weekend.
Fri night, a cold front will move through the state from W to E, and TSRA associated with the leading edge of the boundary.
1154 AM MDT Fri Apr 24 2020 Have expired the winter weather headlines for the mountains this morning as snow continues to taper off across the High Terrain with travel impacts easing.
1158 AM MDT Fri Apr 24 2020 Have expired the winter weather headlines for the mountains this morning as snow continues to taper off across the High Terrain with travel impacts easing.
222 PM CDT Fri Apr 24 2020 A cold front moved across the area earlier today shown mainly by gusty northwest winds as the colder air is still to the north. Winds will shift from the northeast tonight as high pressure builds south and that is when the colder air will filter in with tomorrow's highs only reaching the upper 70s to mid 80s in most locations.
High pressure will gradually build inland across the Great Basin through Saturday.
Meanwhile the low level moisture will remain across NE FL and still expect a few sprinkles or light showers possible this afternoon and have included VCSH through sunset (00z), then the lingering moisture along the frontal boundary across NE FL TAF sites will see a lowering to IFR CIGS by 08-09z time frame with possible LIFR Conds at GNV/VQQ towards sunrise in low stratus and fog.
A cold front over North Florida today will dissipate across Central Florida on Saturday, with southerly flow continuing over the Keys waters.