Aikyam-Lab/Synoptic-Bench huggingface dataset:
1031 PM EDT Wed Apr 5 2023 Showers and a few embedded thunderstorms will end overnight and early Thursday morning with the passage of a strong cold front. A cold front will pass through our forecast area between 5z and 9z with one last area of showers and possible thunderstorms. As an expanding area of high pressure moves across the Ohio Valley during the midday and afternoon, enough dry air will work into our region to allow for definitive clearing. It will be a breezy and notably cooler day, particularly across the western counties, where temps will be some 20 degrees lower than the readings we saw at times earlier today.
701 PM CDT Wed Apr 5 2023 (This evening through Thursday) Our large amplitude upper trough will continue to dig across the Southern Plains along with high pressure and northerly winds down at the surface bringing in unseasonably cooler air. Dense high cloudiness currently over Baja California & Western north Mexico will be transported up through the trough resulting in cloudiness tonight across the Southern Plains. Another cold night tonight with light winds, but cloudcover may keep temperatures from going subfreezing. Temperatures across northern Oklahoma will still drop to or just above freezing. As a result, we'll start seeing a warming trend tomorrow with highs in the 60s, although still unseasonably cooler than normal for early February days.
735 PM EDT Wed Apr 5 2023 A cold front will push through the middle Ohio Valley tonight with showers ending west to east Thursday morning. Will need to watch this area carefully as forcing moves into the Lower Scioto River Valley and north/northeast KY early this evening. Low pressure located near Lake Superior will continue toward Hudson Bay tonight. A cold front will slowly push east tonight, clearing the CWA by midnight. Skies begin to clear Thursday night as high pressure builds in from the west. This sprawling ridge will extend into the forecast area through the period.
In its wake, widespread light rain is expected to persist overnight as a cold front to our northwest will gradually approach the TN Valley. Because of the higher confidence in at least another one inch of rainfall overnight, a flash flood watch for flash flooding remains in effect for portions of our area overnight through tomorrow morning.
921 PM EDT Wed Apr 5 2023 Latest surface map shows an area of low pressure over the western Great Lakes with a cold front pushing across Illinois and Iowa to the western Gulf of Mexico. The cold front is then expected to push southeast overnight. High pressure will then build in bringing the chances of precipitation to our far northern counties late. Cold front should be to our south at the beginning of the period with the only precipitation chances being across the southeast half of the forecast area.
757 PM EDT Wed Apr 5 2023 A warm front will bring a wide range in temperatures to the region this afternoon, along with periods of showers and thunderstorms as a few upper level disturbances roll across the area.
18z surface data has strong low pressure in the arrowhead of Minnesota. The strong cold front ran south from the low through the far eastern parts of Wisconsin and Illinois. Quiet, windy, dry and cool conditions will be seen from late this afternoon through Thursday as high pressure builds into the Midwest.
The big story at the moment is lingering snow and strong winds as the low pressure that brought all of the wintry conditions continues its march northeastward. Based on the Giants Ridge webcam, it looks like that blob quickly reduces visibilities to 1/4 mile, but the road conditions are remaining warm enough to melt anything that develops quickly. A strong spring storm will exit tonight into Thursday bringing storm and gale force winds to the waters this evening for southwesterly winds as the low crosses the the north of Lake Superior.
935 PM EDT Wed Apr 5 2023 Update/Marine/Hydro Cold front has cleared the area with dry, cool and breezy conditions prevailing for the rest of the night. - Narrow line of showers/storms mid to late afternoon today The cold front was crossing Lake MI early this afternoon.
Airmass was quite dry in the lower lower levels today and made it difficult for the snow to form. Despite being in a cooler airmass overall, daytime sun has resulted in some destabilization with satellite imagery showing cumulus developed around the Denver Metro and Palmer Divide. Radar shows showers continuing to develop across the high country with showers beginning to develop over the Palmer Divide. An upper level ridge builds in Thursday, drying out conditions and warming temperatures aloft. This will support warmer highs than Weds with highs approaching 50 over the lower elevations and 20s/30s in the high country.
622 PM CDT Wed Apr 5 2023 (This evening through Thursday Night) The cold front has been progressing much slower than forecast and will be reaching the coast within the next hour or so, however, periods of showers and isolated thunderstorms will continue throughout the night. The lows overnight will be in the low 50s over the Brazos Valley and Piney Woods region, the mid to upper 50s southward towards I-10, and in the upper 50s to low 60s south of I-10.
351 PM MDT Wed Apr 5 2023 Even though the large low pressure storm system has moved far eastward toward the Great Lakes, our region still remains under the influence of the arctic air today through tomorrow behind main circulation. That backside trough will push through a small- scale disturbance that will bring some scattered or isolated snow showers through portions of NE Montana this afternoon through Thursday afternoon.
Southerly winds will develop across the coastal ridges this evening, slowly increasing through the night as this feature nears the coast, with a coastal ridges seeing gusts in the 35 to 45 mph range by late Thursday morning. Light rain spreads across the coastal mountains of Humboldt and Del Norte at this time, but lower elevation sites along the Redwood coast will likely be downsloped through the morning and not see much precip until the main trough and associated front move onshore later Thursday afternoon and overnight.
937 PM EDT Wed Apr 5 2023 A warm front will bring a wide range in temperatures to the region this afternoon, along with periods of showers and thunderstorms as a few upper level disturbances roll across the area.
622 PM CDT Wed Apr 5 2023 Short fuse warnings/continued Tor Watch 126 and Wind Advisory until 4 PM today as cold front is incoming/making its passage.
538 PM MDT Wed Apr 5 2023 Numerous showers have developed as expected across most of the higher terrain and some adjacent valleys this afternoon, as revealed by current satellite and radar imagery. While most surface temperatures are at or below freezing in the mountains and high valleys (especially in northwest Colorado), temperatures in the lower valleys have largely climbed above freezing. The synoptic pattern becomes more zonal on Thursday ahead of a ridge building into the Great Basin. Prevailing winds will become more westerly and allow for warmer air to start flowing back into the region. High temperatures will still be well below normal, but at least several degrees warmer than the past few days. Quiet weather continues Thursday night with high pressure in control.
However, a cold front will drop southeast into the area tonight, with additional convection anticipated along it as moisture continues to advect into the area on southwest flow aloft. Latest surface map shows an area of low pressure over the western Great Lakes with a cold front pushing across Illinois and Iowa to the western Gulf of Mexico. The cold front is then expected to push southeast overnight. High pressure will then build in bringing the chances of precipitation to our far northern counties late. Cold front should be to our south at the beginning of the period with the only precipitation chances being across the southeast half of the forecast area.
An upper ridge near the coast will move into our area on Thursday for continued dry conditions. The ridge will bring with it milder temperatures as highs will be just a few degrees below normal. Southeast winds will develop and become gusty by the afternoon as the next Pacific trough approaches the coast. Temperatures will warm above normal this weekend with passage of a weak trough.
Boxell (Issued 215 PM CDT Wed Apr 5 2023) Tonight through Thursday night: Cold front well to the east and the gusty west wind/caa regime has settled in.
This is indicative of the high cirrus clouds that were being observed on GOES 16 Nighttime Microphysics Imagery. The surface-and mid-level ridge is expected to continue to dominate the sensible weather through the overnight period, therefore, no changes made to the ongoing forecast. Strong high pressure over the western North Atlantic and a strong low pressure system in the Great Lakes region is creating for a tight pressure gradient along the Eastern Seaboard.
754 PM EDT Wed Apr 5 2023 Aviation - Narrow line of showers/storms mid to late afternoon today The cold front was crossing Lake MI early this afternoon.
Otherwise, look for mostly cloudsy skies with lows ranging from the lower 50s behind the front, to around 70 ahead of it.
(Today and tonight) Surface ridging across the Midwest today as the upslope easterly surface winds are maintained across the forecast area. Temperatures will remain cool today with highs in the lower 60s along with some lingering high clouds that will clear through the afternoon hours. Areas along the Caprock have a better potential of below freezing temperatures, versus off the Caprock.
Otherwise, look for mostly cloudy skies with lows ranging from the lower 50s behind the front, to around 70 ahead of it.
1146 PM CDT Wed Apr 5 2023 (Tonight through Thursday night) Much drier air has filtered in behind the cold front early this afternoon with dewpoints tanking into the 10s and 20s.
(Today) A few locations have fallen below freezing this morning, however high clouds for the most part have kept temperatures in the upper 30s to lower 40s.
High pressure will build across the area through the weekend offering continued dry weather conditions.
Hoisted a wind advisory for coastal Del Norte County and the higher elevations of Humboldt County for Thu afternoon and evening. A coastal barrier jet will development in advance of warm frontal system on Thu. Gusts to 50 mph will most likely be confined to the higher elevations across Humboldt County. Southerly winds will develop across the coastal ridges this evening, slowly increasing through the night as this feature nears the coast, with a coastal ridges seeing gusts in the 35 to 45 mph range by late Thursday morning. Light rain spreads across the coastal mountains of Humboldt and Del Norte at this time, but lower elevation sites along the Redwood coast will likely be downsloped through the morning and not see much precip until the main trough and associated front move onshore later Thursday afternoon and overnight.
(Today and tonight) A cold front is located across central KY/NW Middle TN, identified by a sharp dewpoint gradient.
(Today) A slow-moving cold front will continue to nudge toward the Tennessee Valley today. The other aspect of the forecast will be the temperatures themselves as a relatively sizable gradient will setup across the region today, with locations in northeast Alabama peaking in the mid 70s to around 80 degrees (ahead of the front) and locations across northwest Alabama (behind the front) peaking in the low to mid 60s.
109 AM CDT Thu Apr 6 2023 Surface and low level cold front is up against our southeastern counties and may have a hard time getting completely cleared through the day with the larger scale flow aloft moving roughly parallel.
258 AM EDT Thu Apr 6 2023 As a deep cyclone over Ontario moves eastward today, its trailing jet entrance region will be over the mid-Mississippi Valley, extending into Indiana. Also, we went with the lowest end of guidance for dew points since moist layer is shallow and should mix out more readily than most models indicate.
1041 PM CDT Wed Apr 5 2023 (This evening through Thursday) Our large amplitude upper trough will continue to dig across the Southern Plains along with high pressure and northerly winds down at the surface bringing in unseasonably cooler air. Dense high cloudiness currently over Baja California & Western north Mexico will be transported up through the trough resulting in cloudiness tonight across the Southern Plains. Another cold night tonight with light winds, but cloudcover may keep temperatures from going subfreezing. Temperatures across northern Oklahoma will still drop to or just above freezing. As a result, we'll start seeing a warming trend tomorrow with highs in the 60s, although still unseasonably cooler than normal for early February days.
Pleasant weather is on tap today as a transitory ridge allows for moderating temperatures and dry conditions aside from a few mountain showers.
The cold front stretching from the southwest to the northeast is currently splitting Kentucky. Looking into the mid-levels, the LLJ is bringing moisture rich air around high pressure, centered off the coast of Georgia. This moisture is running up the Lower Ohio Valley along the front and is currently producing precipitation that is increasing in coverage. High temperatures under cloudy skies and CAA will only make it into the low to mid 50s in most places.
358 AM CDT Thu Apr 6 2023 Cold air continues to filter into the region in the wake of yesterday's cold front. Lows are expected to land in the 30s for the majority of the CWA, with some locations falling near or below freezing due to efficient radiational cooling caused by clear skies and light winds.
And, with temperatures expected to rise above freezing today, this will crust the snow more. Otherwise, it will be a dry and chilly day but generally about 6 to 10 degrees warmer than yesterday, starting the melting process.
1138 PM MDT Wed Apr 5 2023 Numerous showers have developed as expected across most of the higher terrain and some adjacent valleys this afternoon, as revealed by current satellite and radar imagery. While most surface temperatures are at or below freezing in the mountains and high valleys (especially in northwest Colorado), temperatures in the lower valleys have largely climbed above freezing. The synoptic pattern becomes more zonal on Thursday ahead of a ridge building into the Great Basin. Prevailing winds will become more westerly and allow for warmer air to start flowing back into the region. High temperatures will still be well below normal, but at least several degrees warmer than the past few days. Quiet weather continues Thursday night with high pressure in control.
357 AM EDT Thu Apr 6 2023 A cold front will cross the area this afternoon bringing widespread showers and thunderstorms, some possibly severe.
328 AM EDT Thu Apr 6 2023 Discussion/Hydro - Cooler temps and gusty winds behind the front Baroclinic flow will continue to bring cooler and drier air through the region today. Winds will subside this evening as an upper level ridge builds into the Great Lakes.
346 AM CDT Thu Apr 6 2023 Latest runs of hires guidance suggests these convective snow showers will remain a possibility into the morning hours, but they will drift eastward as the low pressure system does.
High pressure centered in the central North Atlantic has maintained elevated winds overnight, and marine observation platforms recording winds of 18 to 20 knots along the Reef. Aloft, mean layer ridging is centered above the Florida Peninsula, providing large scale subsidence. The Florida Keys will remain under the influence of a ridging pattern for the next few days. Aloft, mean layer ridging will retreat southwestward as it gets pinched between the aforementioned trough in the southeast and a mid-upper level low near Hispaniola.
259 AM EDT Thu Apr 6 2023 Aviation Cold front has cleared the area with dry, cool and breezy conditions prevailing for the rest of the night. - Narrow line of showers/storms mid to late afternoon today The cold front was crossing Lake MI early this afternoon.
301 AM CDT Thu Apr 6 2023 (Issued 301 AM CDT Thu Apr 6 2023) Today and Tonight: Gusty westerly winds will persist today as the pressure gradient remains enhanced between the area of low pressure pulling northeast towards the Hudson Bay and high pressure across the northern and central Plains. Tonight, winds finally relax as high pressure moves overhead. Given how dry the low-levels get this afternoon and evening don't expect any precipitation tonight.
This stacked ridging is producing strong subsidence, keeping a hot and dry airmass in place.
The highest Pops(chc to low end likely) will be across the Northwest Hill country and Heartland, with Pops(slight chance to chance) tapering off further northwest across the area.
313 AM EDT Thu Apr 6 2023 A cold front will push into western Pennsylvania late tonight accompanied by scattered showers.
High pressure dominates through the weekend and for most of new work week. Slow moving cold front, just west of the eastern mountains early this morning, will push southeast this afternoon.
However, a cold front will drop southeast into the area tonight, with additional convection anticipated along it as moisture continues to advect into the area on southwest flow aloft. Latest surface map shows an area of low pressure over the western Great Lakes with a cold front pushing across Illinois and Iowa to the western Gulf of Mexico. The cold front is then expected to push southeast overnight. High pressure will then build in bringing the chances of precipitation to our far northern counties late. The period will begin with quasi-zonal flow aloft as ridging resides off the Southeast coast, while broad troughing across far Eastern Canada.
327 AM EDT Thu Apr 6 2023 The post frontal cooler airmass settles into the region this morning with southeast Michigan residing on the southern end of this thermal trough extending down from Ontario. This cooler airmass is supporting better mixing through the morning hours bringing gusty winds of 25 to 30 mph. Temperatures tonight drop down to around the freezing mark supported by clearing skies.
320 AM EDT Thu Apr 6 2023 High pressure will build eastward across the forecast area through Thursday.
357 AM EDT Thu Apr 6 2023 A cold front associated with a low pressure system moves through the area by late this afternoon or evening, with high pressure building in behind it late in the week.
153 AM EDT Thu Apr 6 2023 A cold front will push through the middle Ohio Valley tonight with showers ending west to east Thursday morning. Will need to watch this area carefully as forcing moves into the Lower Scioto River Valley and north/northeast KY early this evening. Low pressure located near Lake Superior will continue toward Hudson Bay tonight. A cold front will slowly push east tonight, clearing the CWA by midnight. Skies begin to clear Thursday night as high pressure builds in from the west. This sprawling ridge will extend into the forecast area through the period.
1233 AM EDT Thu Apr 6 2023 Low pressure lifting to our northwest will pull a warm front into the region tonight into Thursday followed by a cold front Thursday night.
After a chilly start, temperatures will warm into the lower to mid 60s under filtered sunshine.
1212 AM CDT Thu Apr 6 2023 (This evening through Thursday) Cold front has moved well south of the area this afternoon, with cooler and even drier air mass across the area. Wind speeds will decrease tonight and create a decent radiational cooling set up with temperatures falling into the low to mid 40s. More clouds will keep temperatures down in the lower 60s across the Hill Country on Thursday.
1025 PM CDT Wed Apr 5 2023 The cold front was located from Paris, TN to Memphis to Clarksdale, MS at 02z.
1156 PM CDT Wed Apr 5 2023 The cold front was located from Paris, TN to Memphis to Clarksdale, MS at 02z.
312 AM EDT Thu Apr 6 2023 High pressure will afford mostly sunny skies, along with a much drier and cooler air mass through the region today.
118 AM MDT Thu Apr 6 2023 Upper low has shifted over Ontario, leaving the northern plains in northwest flow.
Warmer ares in the southwest could get into the 40s, perhaps seeing some of the mentioned snow showers mix with rain at times.
1158 PM CDT Wed Apr 5 2023 Short fuse warnings/continued Tor Watch 126 and Wind Advisory until 4 PM today as cold front is incoming/making its passage.
This stacked ridging is producing strong subsidence, keeping a hot and dry airmass in place. Multiple maximum temperature records have been broken or tied over the last couple of days, and this trend could continue each of the next couple of days as highs top out in the low to mid 90s through Friday.
An upper level short wave trough will move across southern Arizona and southern New Mexico Friday and into West Texas by Friday night. Highs on Friday are expected to be in the 60's after lows tonight in the mid 20's to the lower 30's.
921 AM CDT Thu Apr 6 2023 Light to moderate rain continues to stream into Middle TN this hour behind our current cold front.
633 AM EDT Thu Apr 6 2023 High pressure will build eastward across the forecast area through Thursday. This high will strengthen over the region on Friday and persist through the weekend. Dry weather is anticipated across the area through the near term as high pressure continues to build eastward across the Great Lakes region.
This is likely, though, the last time we'll slip this low for a until at least October as the short-term and mid-term forecasts are warm and climatology warms quickly in April, too. Sunny skies and 850hPa temps pushing above freezing thanks to robust WAA lead to widespread upper 60s.
00 GEFS and EPS mean show the highest potential for rain and accumulating snow north of I-94 from north-central into northeast Wisconsin. An upper-level ridge currently located along the west coast amplifies as it slides east over the next two days.
There is a tight west-northwest gradient on the east side of the ridge, with gusts over 30-35 mph at times. By Thursday morning, as the ridge shifts east, expecting a southerly flow to set up area-wide. The low level flow will afford the area peak wind gusts up to 35 to 45 mph. With more of a SW downslope flow on Friday compared to Thursday, Friday will be warmer and even drier. For temps, highs on Thursday will range from the lower and mid 50s west of Kansas Hwy 25, up to upper 50s to around 60s east of there. For Thursday night, upper 20s to the lower 30s are forecasted, and by Friday night, mid 30s to lower 40s.
High pressure will become anchored over the southeast U.
514 AM MDT Thu Apr 6 2023 Even though the large low pressure storm system has moved far eastward into Ontario, the northern plains still remains under the influence of the arctic air today behind main circulation.
As a deep cyclone over Ontario moves eastward today, its trailing jet entrance region will be over the mid-Mississippi Valley, extending into Indiana. Also, we went with the lowest end of guidance for dew points since moist layer is shallow and should mix out more readily than most models indicate.
With the higher amounts, there remains a risk of some minor flash flooding concerns, but dry grounds will help alleviate some of the concerns.
443 AM MDT Thu Apr 6 2023 Upper low has shifted over Ontario, leaving the northern plains in northwest flow.
605 AM CDT Thu Apr 6 2023 (Today) A few locations have fallen below freezing this morning, however high clouds for the most part have kept temperatures in the upper 30s to lower 40s.
A cold front is entering the JKL forecast area from the northwest early this morning.
From synopsis, high pressure over the central North Atlantic will produce moderate to occasionally fresh easterly breezes through Friday.
Low temperatures will be in the 50s and 60s, not getting cooler due to the elevated moisture levels.
617 AM CDT Thu Apr 6 2023 Cold air continues to filter into the region in the wake of yesterday's cold front. Lows are expected to land in the 30s for the majority of the CWA, with some locations falling near or below freezing due to efficient radiational cooling caused by clear skies and light winds.