Aikyam-Lab/Synoptic-Bench huggingface dataset:
Showers have ended throughout the region as of 2:30am Wednesday, and a brief period of ridging is expected for the rest of tonight and Wednesday daytime hours. Temperatures on Thursday will be slightly depressed compared to Wednesday, with temperatures closer to the low to mid 60s in the Willamette Valley. Ensembles suggest the light rain is most likely to arrive Wednesday evening into Wednesday night with some light precipitation chances lingering into Thursday across mainly the higher terrain.
650 AM EDT Wed May 21 2025 Low pressure tracking across the area today will bring scattered showers and a chance of thunderstorms. A large upper level low over the Great Lakes will keep cool and unsettled conditions in the forecast for Thursday.
631 AM CDT Wed May 21 2025 - A cold front will move through overnight into tomorrow morning that will bring a chance for rain along with the cooler nights and less humid days through the later half of the week.
621 AM EDT Wed May 21 2025 (Today and tonight) A cold front will move across the area today with scattered to numerous showers and thunderstorms out ahead of it.
A building ridge of high pressure across the region will result in a slight warming trend the next few days across Southeast Arizona.
The center of the high will drift toward the southeast, and winds will become southeasterly overnight. The higher chances will be over the western Hill Country and eastern Edwards Plateau where the boundary will make its closest approach to our CWA.
354 PM EDT Wed May 21 2025 High pressure will move east as low pressure develops off the Mid-Atlantic coast late tonight.
1149 AM MDT Wed May 21 2025 - Warmer and drier for the rest of the work week. Thursday will be even warmer as the thermal ridge shifts closer to the forecast area, with highs closer to 80F across the plains.
Upper level low pressure continues to sit and spin right over parts of the forecast area this afternoon. At this time, we are expecting readings to fall into the low to mid 30s for areas west of the James Valley, perhaps even in areas that continue to hang onto more cloud cover. Temperatures will modify as a result with daytime readings returning into the low to mid 60s, which is still about 5-10 degrees below normal.
1209 PM EDT Wed May 21 2025 A cold front has moved east of the area, with above normal temperatures and gusty winds expected today. Dry weather and cooler temperatures then expected into the weekend.
1107 AM EDT Wed May 21 2025 Low pressure tracking across the area today will bring scattered showers and a chance of thunderstorms. A large upper level low over the Great Lakes will keep cool and unsettled conditions in the forecast for Thursday.
- Cooler drier conditions expected in the short term. The remnants of the cold front that brought severe weather to most of the CWA has finally cleared out of our area. Winds are expected calm tonight and into tomorrow as high pressure assumes control.
High pressure retreating into the central North Atlantic will result in a col region over the Keys later today with light and variable winds. This is all ahead of a weak cold front approaching from the north over the next day or so.
19z/2pm surface analysis shows a 1002mb low over northern Ohio with a trough axis extending westward along the I-80 corridor.
(This evening through Thursday night) Upper ridging over the southwestern Gulf this afternoon, with troughing over the Great Lakes. Temperatures were in the lower and middle 70s in areas that had received rainfall, and near 80 elsewhere. Most of the local area will only see one night of comfortable temperatures/humidities tonight, with lows in the 60s, although areas adjacent to warmer waters could stay in the lower 70s. Thursday night is likely to be about 5 degrees warmer than tonight.
1240 PM CDT Wed May 21 2025 - Light rain today will give way to warmer weather by the weekend, but critical fire weather is not anticipated. Drier air advecting down from an area of high pressure in Canada is leading to clearing near the Lake of the Woods.
After a warm and pleasant afternoon, a weak and mostly dry front will usher in a slight chance of light precipitation and a brief period of slightly cooler temperatures. Another warmup is in store for the weekend with building high pressure and generally dry weather to continue.
210 PM EDT Wed May 21 2025 Low pressure tracking across the area today will bring scattered showers and a chance of thunderstorms. A large upper level low over the Great Lakes will keep cool and unsettled conditions in the forecast for Thursday.
148 PM EDT Wed May 21 2025 Cool and dry high pressure will be in control of our weather for the second half of the week.
This influx of dry air and weak upper ridging building in will keep us rain-free through the remainder of the work week. With that said, latest guidance hints at a plume of H5 vorticity riding along the periphery of the ridge.
- A weak cold front will provide breezy northeast winds tonight and slightly cooler air Thursday.
Updated at 1204 PM CDT Wed May 21 2025 - High pressure will keep cooler, drier weather locked in over Middle Tennessee through the end of this week.
- Less humid with cooler nights and warm days in the short term.
Behind yesterday's cold front, we won't see anything quite as dramatic as the compressional warming we felt as the front approached yesterday, but the cooling effects of this morning will quickly give way to another warm afternoon. Lows tonight will be seasonable as temperatures dip into the upper 50s across our northern zones to the lower and mid 60s elsewhere. On Thursday, upper-level ridge will begin to build into the southwest CONUS while troughing remains in place across the eastern CONUS. Meanwhile at the surface, a warm front will be lifting northward through our area.
After this point, drier mid level air and northwesterly low level winds will progressively build into the area behind the cold front. High temperatures on Thursday will be in the 70s across the far northern tier, the low to mid 80s in the remainder of north Georgia, and in the upper 80s in central Georgia.
(Through Thursday) A cold front is moving through the area with a line of showers and thunderstorms ahead of the front. Drier air will move in behind the front, though the air is not much cooler. Lows tonight will be in the low to mid-60s, except upper 60s along the coast. Highs will be in the low to mid-90s for most of the area.
An upper ridge will keep mostly clear skies over the region today. The stable air mass will bring light winds with temperatures 4-8 degrees warmer than yesterday. Forecast for today is on track with the next chance for showers and thunderstorms coming tomorrow as an upper trough tracks through the Pac NW.
High temperatures remain above seasonal norms, with subsidence from the weak upper ridge and a decrease in moisture levels behind the weak front.
333 PM EDT Wed May 21 2025 Low pressure slowly glides across the region through the end of the week.
242 PM EDT Wed May 21 2025 Cool and dry high pressure will be in control of our weather for the second half of the week.
With lows dropping into the lower 30s some places, areas of frost is likely.
126 PM EDT Wed May 21 2025 A cold front is located across eastern KY and the Cumberland Plateau. Clearer and drier today behind the cold front. Discussion: Convection has moved east of the region this morning with the actual cold front still to our west across Middle Tennessee. Colder weather late week with troughing across the Appalachians.
Low chance of showers across the area on Thursday night a cold front passage. Discussion: A low pressure system will be rotating over southern Ontario and New England through the next few days, which will keep a generally NW flow through the column across the southern Appalachians. An isolated thunderstorm cannot be ruled out with cool temperatures aloft with the upper trough.
248 PM EDT Wed May 21 2025 Slightly cooler and less humid air will build into the area tomorrow.
1229 PM CDT Wed May 21 2025 Updated at 1226 PM CDT Wed May 21 2025 - High pressure will keep cooler, drier weather locked in over Middle Tennessee through the end of this week. (This afternoon through Thursday Night) High pressure is building into Middle Tennessee following last night's frontal passage.
Weâll keep lingering showers just off to the NE of our CWA today where the slightly deeper low level moisture will reside closer to the low center. Any daytime showers should diminish by tonight with the loss of heating and the resulting loss of the low-level lapse rates. Look for a quiet overnight with temps expected to fall into the low to mid 50s for most.
Low pressure was located over the central Great Lakes this afternoon with high pressure over Hudson Bay and across the Central Plains. An inverted trough stretched from low into the Upper Midwest with some light showers in the vicinity of the trough across central Minnesota into northern Wisconsin. This shower activity was on a downward trend across the Northland as the trough axis slowly sinks southward. An upper low will slowly move south out of northwestern Quebec across Lake Superior tomorrow into tomorrow night.
1208 PM CDT Wed May 21 2025 - A cold front will move through overnight into tomorrow morning that will bring a chance for rain along with the cooler nights and less humid days through the later half of the week.
238 PM EDT Wed May 21 2025 A cold front has moved east of the area, with above normal temperatures and gusty winds expected the rest of today with even gustier winds likely Thursday. Dry weather and cooler temperatures then expected into the weekend.
Upper low overhead will slowly edge out through the ern lakes tomorrow, with showers to continue esp north half within moist/convergent trough axis tonight into early Thu am. Subsidence drying follows later Thu while sfc ridging builds south through the wrn lakes this weekend. Variable flight conditions expected at both sites through at least the first half of the period as low pressure drifts across the area today and wrap-around showers and low clouds linger until it finally pulls away Thursday.
This low- impact pattern will keep temperatures near or slightly above normal for this time of year (with a gradual warming trend as the pattern gradually becomes more ridge dominated), and also provide a few periods of shower and thunderstorm chances.
Expect cooler and showery conditions to persist through Thursday before drier weather returns by the weekend.
A few adjustments have been made to temperatures for the next several hours, as some sites have been trending cooler than expected.
739 PM EDT Wed May 21 2025 (Through Thursday) A cold front is moving through the area with a line of showers and thunderstorms ahead of the front. Drier air will move in behind the front, though the air is not much cooler. Lows tonight will be in the low to mid-60s, except upper 60s along the coast. Highs will be in the low to mid-90s for most of the area.
Deep layered troughing is setting up over the far eastern United States. This has resulted in the retreat of the Atlantic ridge putting the Keys in a col and produced light and variable breezes. While the flow aloft has gone zonal, the mower to mid level ridge remains nearby, displaced southward across Cuba and the Straits. 5 inches, there is still a good dose of dry air through the lower and mid levels. Troughing moving off the Atlantic coast has virtually cut us off from the Atlantic ridge.
558 PM CDT Wed May 21 2025 - Less humid with cooler nights and warm days in the short term.
715 PM EDT Wed May 21 2025 Slightly cooler and less humid air will build into the area Thursday.
Upper low overhead will slowly edge out through the ern lakes tomorrow, with showers to continue esp north half within moist/convergent trough axis tonight into early Thu am. Subsidence drying follows later Thu while sfc ridging builds south through the wrn lakes this weekend. An upper level low centered near Cleveland, OH will slowly spin over the Great Lakes region tonight through tomorrow, bringing periods of rain showers and reduced visibilities. Ceilings will gradually become MVFR/VFR by 21Z to 00Z tomorrow as the low exits the region.
A drier and warmer pattern develops late this week and especially into the weekend with high pressure building overhead.
642 PM CDT Wed May 21 2025 Updated at 636 PM CDT Wed May 21 2025 - High pressure will keep cooler, drier weather locked in over Middle Tennessee through the end of this week. Enjoy it! (This afternoon through Thursday Night) High pressure is building into Middle Tennessee following last night's frontal passage.
1) Afternoon high temperatures will reach the triple digits across much of the lower deserts through the end of the workweek, with some of the typically warmer communities topping 105 degrees today and Thursday.
855 PM CDT Wed May 21 2025 - Less humid with cooler nights and warm days in the short term.
621 PM CDT Wed May 21 2025 Updated at 618 PM CDT Wed May 21 2025 - High pressure will keep cooler, drier weather locked in over Middle Tennessee through the end of this week. (This afternoon through Thursday Night) High pressure is building into Middle Tennessee following last night's frontal passage.
The steady rain of the last few days is gone, with scattered showers remaining mainly north of a line from Mobridge to Miller that will be coming to an end by around 09Z over our southeastern counties (west central SD). The main concern will continue to be the clearing sky and cooler temperatures overnight, with a Frost Advisory for portions of mainly north central SD overnight. Upper level low pressure continues to sit and spin right over parts of the forecast area this afternoon. At this time, we are expecting readings to fall into the low to mid 30s for areas west of the James Valley, perhaps even in areas that continue to hang onto more cloud cover. Temperatures will modify as a result with daytime readings returning into the low to mid 60s, which is still about 5-10 degrees below normal.
Auten 19z/2pm surface analysis shows a 1002mb low over northern Ohio with a trough axis extending westward along the I-80 corridor.
Quiet weather will continue overnight with increasing clouds approaching the region from the northwest as increased atmospheric moisture streams into the area on the southern edge of a slow moving low pressure system. Low chance of showers across the area on Thursday night a cold front passage. Discussion: A low pressure system will be rotating over southern Ontario and New England through the next few days, which will keep a generally NW flow through the column across the southern Appalachians. An isolated thunderstorm cannot be ruled out with cool temperatures aloft with the upper trough.
224 PM MST Wed May 21 2025 1) Afternoon high temperatures will reach the triple digits across much of the lower deserts through the end of the workweek, with some of the typically warmer communities topping 105 degrees today and Thursday.
646 PM EDT Wed May 21 2025 High pressure will ridge across the region tonight, while low pressure develops along the Mid-Atlantic coast.
1006 PM EDT Wed May 21 2025 High pressure will ridge across the region overnight, while low pressure develops along the Mid-Atlantic coast.
A good chance of showers and storms will be possible Thursday afternoon with the highest chances over the interior and east coast, where a Marginal Risk for severe storms will be possible. Another area of high pressure will build into the waters late in the week through the weekend with slight seas and light winds returning.
Expecting a tranquil night under passing high clouds, with lows in the lower-50s to lower-60s. - Cooler drier conditions expected in the short term. The remnants of the cold front that brought severe weather to most of the CWA has finally cleared out of our area. Winds are expected calm tonight and into tomorrow as high pressure assumes control.
619 PM CDT Wed May 21 2025 (This evening through Thursday night) Upper ridging over the southwestern Gulf this afternoon, with troughing over the Great Lakes. Temperatures were in the lower and middle 70s in areas that had received rainfall, and near 80 elsewhere. Most of the local area will only see one night of comfortable temperatures/humidities tonight, with lows in the 60s, although areas adjacent to warmer waters could stay in the lower 70s. Thursday night is likely to be about 5 degrees warmer than tonight.
524 PM MDT Wed May 21 2025 - Warmer for the rest of the work week.
(Rest of tonight and Thursday) A cold front is slowing moving east southeast towards the area this evening. Shear is fairly strong near and south of the cold front (40-50 knots).
Besides periods of drizzle to very light rain dropping southward through this morning and into the afternoon as the inverted trough gradually departs the region, relatively quiet weather is expected through today and much of Friday.
A low pressure system will linger over the eastern great lakes through Thursday, maintaining an extensive area of low level moisture locally during this time.
1119 PM CDT Wed May 21 2025 - Less humid with cooler nights and warm days in the short term.
Temperatures today and tomorrow drop to near normal, due to two weak low pressure systems impacting the area. The low today will move along the OR border, bringing enhanced gusty winds areawide. The holiday weekend looks to be warm and dry, due to high pressure settling in to the north.
(Through Thursday) A cold front is moving through the area with a line of showers and thunderstorms ahead of the front. Drier air will move in behind the front, though the air is not much cooler. Lows tonight will be in the low to mid-60s, except upper 60s along the coast. Highs will be in the low to mid-90s for most of the area. Morning low temperatures will be in the mid-60s for Friday morning and warm to the low to mid-90s for the afternoon.
1135 PM CDT Wed May 21 2025 Updated at 1118 PM CDT Wed May 21 2025 - Cooler and less humid conditions are expected through Friday.
259 AM CDT Thu May 22 2025 - Continued cold through this morning, with sub-freezing temperatures southwest and some areas of frost north and south central. This morning, the closed upper low that has been bringing widespread rain to the region was starting to finally weaken and get absorbed into broad northwest flow across the Dakotas. Highs will still be seasonably cool, in the upper 50s to mid 60s, but some sunshine will make it feel a bit warmer.
225 AM CDT Thu May 22 2025 Updated at 149 AM CDT Thu May 22 2025 - Cooler and less humid conditions are expected for the remainder of the work week.
Upper low overhead will slowly edge out through the ern lakes tomorrow, with showers to continue esp north half within moist/convergent trough axis tonight into early Thu am. Subsidence drying follows later Thu while sfc ridging builds south through the wrn lakes this weekend. A dance of the upper low pressure systems occurs as one stalls over Detroit while another circles around it southwestward from Canada towards the Northern Great Lakes.
a warm front will lift north from the SW into SWRN AR with a new upper disturbance moving SE aloft.
This high level moisture clears out to the southwest during the day.
The moisture recovery is due to the rainfall taht was see yesterday, so those areas that recieved rain will have the highest chances of getting fog for Fri morning.
- Looking warmer and mostly dry for the latter half of the weekend into Memorial Day, with just an outside chance for an afternoon shower or thunderstorm.
(Today through Friday Night) Continued hot and muggy weather is expected through Friday as a building upper-level ridge brings the increased temperatures and onshore flow brings the humidity. Temperatures this afternoon will rise into the low to mid 90s for most of the region with heat indices rising into the upper 90s to low triple digits. Overnight lows tonight will be in the low 70s north and west of the Houston Metro, and then mid to upper 70s in the Metro and along the coast. Friday will be pretty similar to today temperature-wise, but the ridge aloft will be stronger limiting the potential for any afternoon shower or thunderstorm activity.
(Thursday through Friday) Near zonal flow aloft this morning will give way to northwest flow today as ridging begins to build from the Desert Southwest into the Rockies. /33/ (Friday Night through Thursday) Aforementioned ridging across the southwest CONUS will weaken some as it pushes eastward across central Texas as we head into the weekend.
1) Afternoon high temperatures will reach the triple digits across much of the lower deserts through the end of the workweek, with some of the typically warmer communities topping 105 degrees today and Thursday. A decaying upper level trough is advertised to move onshore along the CA Coast Friday and pass through the Great Basin early this weekend.
A small trough is expected to pass through Northern California tomorrow morning, which will lead to increased winds in the Valley and Desert Slopes down in our CWA. Ahead of this trough is a slight ridging pattern that will cause temperatures this afternoon to be above normal for this time of year. There will also be strong winds along the Mojave Desert Slopes during the passage of this trough, with sustained winds of 20 to 30 mph and gusts up to 50 mph. After the passage of the trough on Thursday, weather conditions are expected to calm, though afternoon RH's are expected to remain low throughout the period.
By Friday morning, the Upper Mississippi Valley will be sandwiched between an upper ridge to the west and troughing to the east. Height anomalies at 500mb suggest a more amplified pattern, with deep troughing over Alaska and coincident ridging across much of the central & western US up into northern Canada.
Pattern/synopsis: Amidst a broad area of upper troffing, separate upper lows are over ne SD, se lower MI, and southern James Bay this afternoon. The one to our north will become the dominant one (the western one fills/gets absorbed; the southern one degens into a weaker upper trof). In the process, that northern upper low gradually moves ssw-ward toward central/ eastern Lk Superior thru late Thursday. The deterioration of the upper low to our south will remove the deformation forcing that has been hanging out in our southern zones today and last night. A broader and less focused area of forcing will linger over and near Lk Huron tonight (weaker deformation, as the remains of that upper low shift eastward). Upper low remains over the area into Friday, before reforming over northern New England.
213 AM EDT Thu May 22 2025 High pressure centered over the Gulf Coast will build into the region today. A reinforcing cold front will move across NC this afternoon and evening. It will be followed by cooler high pressure that will build from central Canada to the southern Middle Atlantic into the weekend. High pressure will build into the region today as low pressure exits to the east. A reinforcing dry cold front will push through the region this afternoon and early evening. Turning cooler with lows in the upper 40s to mid 50s. Cool air advection will continue Friday as high pressure builds in from the west. Expect highs in the lower to mid 70s, except upper 70s over the SE. The high pressure will build overhead Friday night.
High temperatures remain above seasonal norms, with subsidence from the weak upper ridge and a decrease in moisture levels behind the weak front. Zonal flow aloft will gradually turn northwesterly through the day on Friday as a ridge builds to our west with a trough to our northeast.
159 AM EDT Thu May 22 2025 Low pressure slowly glides across the region through the end of the week.