Aikyam-Lab/Synoptic-Bench huggingface dataset:
1216 AM CDT Thu Sep 4 2025 - A cold front will bring a 60-80% chance for showers and thunderstorms to central Illinois late this afternoon and evening. This afternoon, low pressure is located just east of Lake Superior with a cold front draped southwest across northern Illinois into north central Missouri. Regional obs show dew points pooling in the low to mid 60s near the front contributing to modest instability. This will help advect cooler temps into the region with lows dipping into the 40s north of I-72. Surface front will spread south across the Ohio Valley Thursday while high pressure builds back across the Midwest in its wake. Cooler temperatures and notably lower dew points will be associated with this air mass. High temperatures will only be the low 70s Thursday afternoon while dew points mix down into the 40s.
The front will remain rooted in place through the next few days, while the low meanders northeast into the western North Atlantic, promoting southwest to west breezes throughout the week. High pressure slowly building across the North Atlantic over the weekend will support reduced rain and thunder chances, although remaining at or above normal.
618 AM EDT Thu Sep 4 2025 Showers and a few thunderstorms will be possible today as a cold front moves through the Ohio Valley.
The main thing is to emphasize a little stronger cold front passage with a bit more wind, but the main impact will be advecting in some of the smoke that's over the northern plains.
614 AM EDT Thu Sep 4 2025 High pressure to the north will maintain control into the middle of the week. An approaching cold front will lead to warming this weekend as the high moves offshore into Friday.
722 AM EDT Thu Sep 4 2025 High pressure will extend across the area through late week.
700 AM EDT Thu Sep 4 2025 A cold front is expected to move through the area today, bringing showers and isolated thunderstorms this afternoon with gusty winds and brief heavy rain, mainly along and east of I-81. Cooler and unsettled weather continues into the weekend. A cold front moves through the area today, with south- southeasterly winds increasing mid-to-late morning as the pressure gradient pinches.
Many of the CAMs show the low pivoting somewhere near the Twin Cities metro, contributing to higher QPF over a narrow strip of counties in northwest WI.
457 AM CDT Thu Sep 4 2025 - Cold front passes through this morning, with strong northwest winds in its wake.
632 AM CDT Thu Sep 4 2025 - Cold front late tonight into Friday morning will not only bring-in some colder air, but will also provide storm chances. Currently have a deep upper low situated over Southern Ontario/Northern Great Lakes with strong northwest flow aloft over the Plains. The cold front that brought storms to the area Wed evening is now located down across central OK. This will allow another cold front to surge across the Northern/Central Plains and will push through the forecast area tonight into Fri morning. By Sat morning, cold front will be located down across Southern TX with an unseasonably cool airmass in place across the Plains.
718 AM EDT Thu Sep 4 2025 (Today through Friday) Few changes in the synoptic pattern this morning as upper level troughing remains in place across the Eastern United States and a frontal boundary lingers over the Florida Keys. Highs will top out in the upper 80s and low 90s, while overnight lows will stay in the low to mid 70s across the whole area.
431 AM MDT Thu Sep 4 2025 - Strong dry cold front passes through the Northern Plains today, bringing gusty northwest winds and elevated fire conditions. 10Z upper level analysis has the Northern Plains under fast northwest flow as deep closed low spins just north of Lake Superior. At the surface, high pressure resides across the Northern Plains, with a frontal boundary across eastern Montana and Wyoming. High temperatures prior to the arrival of the cold front will be in the 70s to mid 80s.
446 AM MDT Thu Sep 4 2025 - Temperatures trend around 5 degrees above normal today before a cooler and more active storm system moves in by Friday. It also shows high pressure centered over Durango Mexico is pulling the moisture from Lorena more to the east mostly south of the Mexican Border. It may take some time for the lower levels to saturate so the highest precipitation chances remain south of I-70, but as soon as the vertical column moistens it will be game on area wide.
* Another cold front will swing through the region tonight. Cold front that worked through the region yesterday afternoon and evening has pushed into southern Missouri. High pressure centered just south of Omaha as of 08Z will lead to decreasing northerly winds as the ridge builds south and east this morning. Once the ridge shifts to the east, southerly winds are expected to develop throughout the day leading to gradually improving visibilities throughout the day. A quick moving cold front associated with a low pressure system in southeastern Saskatchewan is expected to work through the region tonight. A cold front will move through the region tonight, with the chance of rain increasing behind the front, mainly after 12Z Friday.
- A cold front will bring a 20 to 40 percent chance of additional showers south of I-72 Friday, with the greatest chances south of I-70 Friday evening. Highs in the low 70s, with overnight lows in the 50s. Most of the area should remain dry during this frontal passage, but where the cold front clips southeastern IL could see some additional rain.
727 AM EDT Thu Sep 4 2025 High pressure will extend across the area through late week.
543 AM MDT Thu Sep 4 2025 - Temperatures trend around 5 degrees above normal today before a cooler and more active storm system moves in by Friday. It also shows high pressure centered over Durango Mexico is pulling the moisture from Lorena more to the east mostly south of the Mexican Border. It may take some time for the lower levels to saturate so the highest precipitation chances remain south of I-70, but as soon as the vertical column moistens it will be game on area wide.
847 AM EDT Thu Sep 4 2025 Showers and a few thunderstorms will be possible today as a cold front moves through the Ohio Valley.
This will turn our low-level winds back to the south briefly today before a secondary cold front drops south late this evening through the overnight hours. The clouds and rain will keep temperatures much cooler with highs in the 60s.
644 AM CDT Thu Sep 4 2025 - Cold front passes through this morning, with strong northwest winds in its wake.
(Today and tonight) Mostly rinse and repeat with slightly cooler temperatures today in the North Bay and SF Bay Area due to more robust Pacific moisture under a deep marine layer.
519 AM MDT Thu Sep 4 2025 - Strong dry cold front passes through the Northern Plains today, bringing gusty northwest winds and elevated fire conditions. 10Z upper level analysis has the Northern Plains under fast northwest flow as deep closed low spins just north of Lake Superior. At the surface, high pressure resides across the Northern Plains, with a frontal boundary across eastern Montana and Wyoming. High temperatures prior to the arrival of the cold front will be in the 70s to mid 80s.
605 AM CDT Thu Sep 4 2025 Updated at 538 AM CDT Thu Sep 4 2025 - Warmer weather expected again today with highs in the mid 80s to upper 90s.
849 AM CDT Thu Sep 4 2025 - Cold front passes through this morning, with strong northwest winds in its wake.
605 AM CDT Thu Sep 4 2025 - A weak cold front passes through the area today, with just a slight risk of showers or storms in northern areas this morning. - A stronger cold front moves through on Friday with temps well below normal by the weekend.
Very warm temperatures can also be expected with most areas topping out in the lower 90s this afternoon. Morning dewpoints in the upper 60s to around 70 degrees should mix out later this afternoon into the lower to middle 60s inland as the boundary layer mixes up to around 5kft or so. So although high temperatures will be very warm, we are not expecting any significant heat issues as heat indices will remain in the lower to middle 90s. The next chance for any increased rain chances will be over the weekend as a cold front advances through the region.
603 AM CDT Thu Sep 4 2025 - Another cold front will move through on Friday and bring rain chances (40-60%) throughout the day and even cooler temperatures through the weekend.
154 PM EDT Thu Sep 4 2025 A cold front is expected to move through the area today, bringing showers and isolated thunderstorms this afternoon with gusty winds and brief heavy rain, mainly along and east of I-81. Cooler and unsettled weather continues into the weekend. A cold front moves through the area today, with south- southeasterly winds increasing mid-to-late morning as the pressure gradient pinches.
/86/ Troughing over the region will lift north a bit Friday, allowing quasi-zonal flow aloft to exist over the region. While heat indices with this activity will be noticeably warmer than recently, the risk for advisory-level heat (105 F heat indices or higher) appears low with dewpoints generally in the lower 70s and upper 60s.
206 PM MDT Thu Sep 4 2025 - Cold front passing through today is bringing strong northwest winds.
1250 PM EDT Thu Sep 4 2025 A cold front brings showers and perhaps an isolated thunderstorm or two today.
- Cooler temperatures are expected today and Friday before a warmup this weekend.
250 PM CDT Thu Sep 4 2025 - Another cold front will move through the area late tonight into Friday morning.
will gradually improve this evening and overnight as a cold front rapidly tracks south across the local area. - There will be a 3-6 hour window ahead of the main cold front this evening where a few thunderstorms could develop across the local area. with the highest probabilities across north central Kansas. - Behind the cold front.
352 PM EDT Thu Sep 4 2025 Showers and isolated thunderstorms are expected today with a passing cold front. A second cold front may return isolated thunderstorm late tomorrow evening. Cooler conditions are expected over the weekend. KEY MESSAGES: - Showers and localized thunderstorms this afternoon/evening - Gusty conditions may occur with showers/storms - Fog expected tonight --------------------------------------------------------------- A cold front is currently situated between Pittsburgh and Cleveland this afternoon. After dark, probability of thunderstorms rapidly decreases with the loss of surface heating and the front stalling near the ridges.
1126 AM MDT Thu Sep 4 2025 - Strong dry cold front passes through the Northern Plains today, bringing gusty northwest winds and elevated fire conditions. 10Z upper level analysis has the Northern Plains under fast northwest flow as deep closed low spins just north of Lake Superior. At the surface, high pressure resides across the Northern Plains, with a frontal boundary across eastern Montana and Wyoming. High temperatures prior to the arrival of the cold front will be in the 70s to mid 80s.
Precipitation chances for this evening and overnight near 90 to 100 percent across our entire forecast area, as an area of low pressure will swing from west to east across the northern portion of Wisconsin. With this low pressure area centered to our north, the rainfall amounts will increase the further north one travels in Wisconsin.
(Rest of today through Friday) The persistent mid to upper level longwave trough will continue to remain in place across the Eastern Seaboard through the rest of today and into Friday.
1158 AM MDT Thu Sep 4 2025 - Temperatures trend around 5 degrees above normal today before a cooler and more active storm system moves in by Friday. It also shows high pressure centered over Durango Mexico is pulling the moisture from Lorena more to the east mostly south of the Mexican Border. It may take some time for the lower levels to saturate so the highest precipitation chances remain south of I-70, but as soon as the vertical column moistens it will be game on area wide.
The main parent trough begins lifting tomorrow, which will allow temperatures to heat up more.
- The arrival of a cold front Friday morning will see temperatures cool and the Panhandles getting their first taste of fall with highs in the 60s to 70s. Upper level ridging to our west is dominating today's weather, but northwest flow will allow a stronger cold front to advance across the southern Plains early Friday morning through the day. These factors also suggest the warmest temperatures of the day could occur before noon, getting progressively cooler as the day goes on.
A deep upper level trough over the eastern half of the country has northwesterly flow over Texas. In the short term the upper trough will lift off to the northeast allowing the subtropical ridge to build back over Texas. While this shift occurs the low level flow will become more southeasterly bringing moister air back to the region. This will mean warmer lows Friday which will be back to near normal. The upper ridge will keep the weather dry Friday.
* Another cold front will swing through the region tonight. Cold front that worked through the region yesterday afternoon and evening has pushed into southern Missouri. High pressure centered just south of Omaha as of 08Z will lead to decreasing northerly winds as the ridge builds south and east this morning. Once the ridge shifts to the east, southerly winds are expected to develop throughout the day leading to gradually improving visibilities throughout the day. A quick moving cold front associated with a low pressure system in southeastern Saskatchewan is expected to work through the region tonight. Cold front sinks southward overnight, and will cause winds to shift more northwesterly, and will bring shower potential across most of the area.
206 PM EDT Thu Sep 4 2025 - Breezy and briefly warmer on Friday with westerly gusts of 25 to 35 mph.
- Cooler temperatures arrive on Friday with highs only in the 60s and lows in the mid 30s to mid 40s. As this front pushes through the region, cooler temperatures will also begin to filter into the area. In addition, cold air advection into the region will push cooler 850 mb temperatures in the 3 to 8 C range out of Canada.
- Fall-like temperatures will continue into the weekend as an unseasonably strong system brings much cooler air to the northern plains/upper midwest.
240 PM EDT Thu Sep 4 2025 A cold front is expected to move through the area bringing showers and isolated thunderstorms into the evening hours.
Beautiful temperatures ongoing this morning with dewpoints in the 60s to low 70s, with temperatures rising to the low 90s inland today, and mid to upper 80s along the coast.
- Cold front late tonight into Friday morning will not only bring-in some colder air, but will also provide storm chances. Currently have a deep upper low situated over Southern Ontario/Northern Great Lakes with strong northwest flow aloft over the Plains. The cold front that brought storms to the area Wed evening is now located down across central OK. This will allow another cold front to surge across the Northern/Central Plains and will push through the forecast area tonight into Fri morning. By Sat morning, cold front will be located down across Southern TX with an unseasonably cool airmass in place across the Plains.
A clipper low pressure system developing in the Northern Plains will move through northern WI tonight, then northeast toward James Bay on Friday. Wind will also be a big factor with this system, with gusty south to southwest arriving in eastern sections ahead of the clipper later tonight, then strong west to northwest winds all locations as the low departs Friday morning.
Across southern MN, clear skies and southerly flow have allowed temperatures to warm into the low to mid 60s. An incoming upper-level jet will cause the low to deepen, which will cause rain to become more widespread around the low as we go into this afternoon and evening. A few thunderstorms are also possible ahead of the cold front that will extend south into southern MN. The low will move east into the Upper Great Lakes by Friday morning. Precipitation should end from west to east relatively quickly as mid- level drying occurs in the wake of the low.
Highs tomorrow will be in the low/mid 80s across lower elevations, with an overall drop everywhere of 3-6 degrees from today.
A rather impressive upper trough for early September will remain in place across the eastern CONUS.
205 PM EDT Thu Sep 4 2025 High pressure will extend across the area through late week.
206 PM CDT Thu Sep 4 2025 - A cold front will move through the region Friday resulting in rain chances (40-70%) though rainfall amounts will be largely less than a quarter inch. The major synoptic system impacting our weather into the weekend will be a upper trough over eastern Canada into the Great Lakes. The first major wave of energy rotating around the trough has an associated cold front that exited into northern Arkansas this morning.
The upper pattern over the central and eastern CONUS continues to be dominated by an upper low over Ontario. The cold front remains on track to pass south through the area late this evening into overnight hours.
WV imagery indicates a closed upper low shifting slowly southeast through the Great Lakes Region with a northwest flow aloft prevailing across the Western High Plains. Near the surface, high pressure is building in across Nebraska into much of Kansas in wake of a weak cold front advancing southward into the Texas Panhandle and western Oklahoma. With the HREF indicating a 40-60% probability of temperatures topping 80F in south central Kansas to better than a 90% probability of exceeding 90F out near the Colorado border, look for wide ranging afternoon highs today from the lower/mid 80s(F) in south central Kansas to the mid/upper 90s(F) in extreme southwest Kansas. A cold front will arrive between 07-10z, with north winds at 15-20 kts in its wake.
1248 PM CDT Thu Sep 4 2025 - Another cold front will move through on Friday and bring rain chances (40-60%) throughout the day and even cooler temperatures through the weekend.
202 PM MDT Thu Sep 4 2025 - A strong cold front will push through the CWA this afternoon, bringing a winds shift along with stronger winds.
(This evening through Friday) Water vapor imagery early this afternoon depicts an upper level trough stretching from the Great Lakes region down to the Southeast. At the surface, a cold front can be analyzed to our northwest across northern Tennessee into eastern Arkansas. Rain chances begin to increase during the evening and overnight hours as the aforementioned cold front begins to move south across the state. Friday looks to be our warmest day with temps climbing into the low to mid 90s across the region.
- Hot again on Friday with a chance of isolated thunderstorms Friday afternoon - Cooler temperatures with increasing rain chances return for the weekend. North of the front across the Red River Valley, temperatures are running about 10 degrees cooler. Dewpoints down in the 40s allowed temperatures down in the low 60s for lows, even mid 50s down along the I-10 corridor. Stronger cold front arrives as early as tomorrow afternoon into the Big Country.
- Strong cold front moves into the region on Friday with a large temperature gradient across the front.
- The arrival of a cold front Friday morning will see temperatures cool and the Panhandles getting their first taste of fall with highs in the 60s to 70s. (Today through Friday night) Present synoptic pattern continues see the development of the ridge over the Western United State as the trough settled over the Great Lakes region slowly exits to the northeast. Moving into Friday, does see an interesting change to our weather with many models expecting the arrival of a backdoor cold front during the morning. Confidence on this potential is not too high, however, as cold fronts have a tendency to sink further south than what models project. For now, have kept the lower POPs in for Friday.
635 PM CDT Thu Sep 4 2025 - Strong cold front moves into the region on Friday with a large temperature gradient across the front.
641 PM CDT Thu Sep 4 2025 - A cold front will move through the region Friday resulting in rain chances (40-70%) though rainfall amounts will be largely less than a quarter inch. The major synoptic system impacting our weather into the weekend will be a upper trough over eastern Canada into the Great Lakes. The first major wave of energy rotating around the trough has an associated cold front that exited into northern Arkansas this morning.
415 PM MDT Thu Sep 4 2025 - Cold front passing through today is bringing strong northwest winds.
617 PM CDT Thu Sep 4 2025 - Another cold front will move through the area late tonight into Friday morning.
820 PM CDT Thu Sep 4 2025 (This evening through Friday) Water vapor imagery early this afternoon depicts an upper level trough stretching from the Great Lakes region down to the Southeast. At the surface, a cold front can be analyzed to our northwest across northern Tennessee into eastern Arkansas. Rain chances begin to increase during the evening and overnight hours as the aforementioned cold front begins to move south across the state. Friday looks to be our warmest day with temps climbing into the low to mid 90s across the region.
812 PM EDT Thu Sep 4 2025 A cold front is expected to move through the area bringing showers and isolated thunderstorms into the evening hours.
620 PM CDT Thu Sep 4 2025 - Hot again on Friday with a chance of isolated thunderstorms Friday afternoon - Cooler temperatures with increasing rain chances return for the weekend. North of the front across the Red River Valley, temperatures are running about 10 degrees cooler. Dewpoints down in the 40s allowed temperatures down in the low 60s for lows, even mid 50s down along the I-10 corridor. Stronger cold front arrives as early as tomorrow afternoon into the Big Country.
Total rainfall amounts reported from available gauge data ranged from around 1-4" in the Lower Keys, 0. Given the local source of the subsidence, and the fact that the frontal boundary to our north has made little movement, we expect restoration and charging to occur of the low-levels overnight, with another round of scattered to widespread convection emerging by the late overnight hours in the vicinity of the Keys. The front will remain rooted in place through the next few days, while the low meanders northeast into the western North Atlantic, promoting southwest to west breezes. High pressure slowly building across the North Atlantic over the weekend will support reduced rain and thunder chances, although remaining at or above normal.
754 PM EDT Thu Sep 4 2025 - Breezy and briefly warmer on Friday with westerly gusts of 25 to 35 mph.
529 PM MDT Thu Sep 4 2025 - A strong cold front will push through the CWA this afternoon, bringing a winds shift along with stronger winds.
657 PM EDT Thu Sep 4 2025 (Rest of today through Friday) The persistent mid to upper level longwave trough will continue to remain in place across the Eastern Seaboard through the rest of today and into Friday.
Otherwise, it will be mostly clear to partly cloudy and warmer with lows in the mid to upper 60s. On Friday, the cold front will be stationed up to our northwest. Temps will warm up into the lower to mid 90s with heat index (haven't had to use that term in a little while) values ranging from the mid 90s to lower 100s. We've been running cooler than normal temps recently, so it will definitely feel hot tomorrow returning into the 90s.
737 PM EDT Thu Sep 4 2025 Showers and isolated thunderstorms are expected today with a passing cold front. A second cold front may return isolated thunderstorm late tomorrow evening. Cooler conditions are expected over the weekend. KEY MESSAGES: - Fog expected tonight --------------------------------------------------------------- After dark, probability of thunderstorms rapidly decreases with the loss of surface heating and the front stalling near the ridges.
544 PM EDT Thu Sep 4 2025 High pressure will extend across the area through late week.
153 AM MDT Fri Sep 5 2025 - Much cooler temperatures today, about 6 to 12 degrees cooler, with highs generally in the 70s.