Aikyam-Lab/Synoptic-Bench huggingface dataset:
Issued by National Weather Service Columbia SC 432 AM EDT Tue May 13 2025 A front is pushing east across the region, with high pressure expected to return late week with rising temperatures. The cold front has moved through the area quicker than anticipated, leading to significantly lower areal coverage of shower and thunderstorm activity.
The associated surface cold front will linger off-shore along the Gulf Stream today, which will support additional development of showers and thunderstorms across the East Coast metro and local Atlantic waters. Temperatures will gradually warm up through the period, with highs in the low-mid 80s along the coasts and up to the low 90s over southwest Florida.
1253 AM PDT Tue May 13 2025 * Cooler conditions today with areas of mountain snow and valley rain showers through evening.
236 AM CDT Tue May 13 2025 Most of the precip has moved east of the CWA early this Tue morning as the closed upper low lifts slowly to the NE of AR. A clearing sky and light/variable winds on the back side of this upper low has allowed for temps to cool. POPs will become low for most areas with the upper low exiting further to the NE. Temps will increase further for Wed as upper level ridging increases over the region. A new cold front will drop SE into the state for Thu night.
Cooler northeast WY, northwest SD and Black Hills with warm temperatures continuing over south central SD.
1013 PM MDT Mon May 12 2025 - Next round of precipitation arrives late this evening as a cold front begins to make its way through Eastern Idaho.
The slow progressing upper low will continue to shift northeast over the Tennessee Valley tonight, and aside from a low risk for showers/storms over mainly NE AL, expect conditions to stay dry tonight. Low to mid level cloud cover will increase from the west during the early morning hours as the low continues to move northeast. High temps will be a few degrees cooler tomorrow, only reaching the mid 70s.
Cooler and wetter weather pattern will stick around this week with several opportunities for showers and afternoon thunderstorms. Today through Wednesday: As the upper low moves inland, there is an ongoing threat for afternoon showers and thunderstorms, especially southeast Washington and the southern Panhandle. As the upper low moves into southern Idaho tomorrow afternoon, expecting a similar situation as today with showers and isolated thunderstorms starting around 10 AM to 12 PM in the northern mountains.
1213 AM CDT Tue May 13 2025 - Warmer and humid weather returns this week.
136 AM MDT Tue May 13 2025 - Precipitation arrives today as a cold front begins to make its way through Eastern Idaho.
Issued by National Weather Service Columbia SC 426 AM EDT Tue May 13 2025 A front is pushing east across the region, with high pressure expected to return late week with rising temperatures. The cold front has moved through the area quicker than anticipated, leading to significantly lower areal coverage of shower and thunderstorm activity.
Tomorrow, the subtropical jet will undercut a digging upper-level trough in the Western US, and this enhanced flow over the mountainous terrain, in addition to increased diffluence aloft, will potentially below 990mb.
Upper level high pressure over northern Mexico will expand northward into west central Texas. Meanwhile, an 850 mb thermal ridge will also expand and strengthen over the region.
330 AM EDT Tue May 13 2025 High pressure continues to drift east of New England through the week. The end of the work week into the weekend will feature yet another slow moving low pressure system that will increase rain chances.
1159 PM CDT Mon May 12 2025 - An upper level low will continue to move slowly out of the area tonight over the region with clouds, some light rain or drizzle. - High pressure building in will lead to drying conditions and a warming trend becoming hot and humid by mid week. (Tonight through Wednesday night) The upper low centered over MS this afternoon is continuing to influence the sensible weather across the region today with considerable cloud cover remaining and temperatures in the low to mid 70s. This feature will peak up speed moving to into the Ohio Valley Tuesday into Wednesday with ridge building into the area in its wake.
(Today and tonight) Mid-level ridging will begin to push into the southern Plains today as a longwave trough moves into the western portions of the CONUS. At the surface, lee troughing along the Rockies will aid in strengthening southerly winds across the area. As the mid-level ridging overspreads the area, dry conditions are expected today and tonight. Overnight lows will be warmer across the area, with most locations getting down to the lows 60s.
354 AM CDT Tue May 13 2025 - Mild and dry conditions expected this week - An active weather pattern is likely to emerge this weekend, increasing the potential for showers and storms; severe storms are possible as well As of 345 AM Tuesday morning, the stubborn cutoff low across the southeast US is moving to the northeast as midlevel ridging builds across the central CONUS. Further west, a trough axis has come ashore with cyclonic flow overspreading the central and northern high Plains.
Water vapor imagery early this afternoon indicates a negatively- tilted trough situated over the southeast CONUS as a mid/upper wave arrives onshore in the Pacific Northwest. These winds will continue to support seasonably warm high temperatures in the low to middle 80s through Tuesday as the upper ridge builds in. Seasonably warm temperatures in the low to mid 80s will persist through the end of the week. Lee troughing is slowly starting to strengthen over the High Plains which will allow winds to say out of the southeast.
(Rest of today and tonight) Another relatively pleasant day today under mostly sunny skies with temperatures (mostly low/mid 80s) this afternoon expected to be just a few degrees warmer than yesterday. Winds will continue to slowly shift towards the south the rest of this afternoon and evening as lee trough continues to develop. Warmer temperatures are expected tonight with lows in the mid 50s to around 60. (Tuesday through Wednesday night) Models show weak mid/upper ridging moving into the region tonight into Tuesday as the upper longwave trough moves across the western U. This ridge will continue to slowly shift eastward Tuesday night into Wednesday as the upper trough moves across the Rockies into the Plains. With the ridging influencing the area, dry conditions are expected into the middle part of the week.
(This evening through Tuesday) Lee troughing along the TX-NM border was spurring breezy SSW winds this afternoon. This feature will assume a dryline structure on Tuesday as it peels east of the forecast area ahead of deep westerly flow trailing an upper ridge.
- Pattern change on Wednesday bringing cooler temps, increasing winds, and moisture mainly for the high country and northern portion of the forecast area. Tomorrow is still expected to be another warm and dry day ahead of Wednesday's pattern shift due to the approaching trough that has officially pushed ashore the Pacific Northwest today. As the trough passes over the Rockies on Wednesday, an associated cold front at the surface is progged to slide south across the forecast area Wednesday afternoon/evening. We will see increasing PoPs from Wednesday afternoon into the evening, with a chance for some showers and thunderstorms as the trough axis passes and the front drops south.
MIMIC Precipitable Waters shows significant dry air behind this trough that is expected to push into our area over the next few days. Late this week and into the weekend, with that dry air taking over and high pressure building in over us, rain chances will taper off leaving us to near climatology for this time of year (10%). As the low lifts toward the northeast during the middle of the week, higher pressure will be able to fill in behind it, encouraging drier weather and slackening breezes.
(Today through Wednesday) The pesky upper low that has plagued the area for the last several days has finally begun to pull away from the area, centered between Memphis and Nashville early this morning, with ridging over the Rockies. The upper low will continue to pull away, and be centered around the Ohio-Michigan border by Wednesday afternoon. Temperatures will be considerably warmer the next couple days than what we've had over the weekend. Highs will be in the mid to upper 80s, with tomorrow being a couple degrees warmer than today. Overnight lows will also be warmer, with Wednesday morning lows from the mid 60s to lower 70s, about 5 degrees warmer than normal.
Showers will mostly taper tonight as an upper level low continues to progress inland across the Pacific Northwest. Upper level ridging will start to build into the area midweek for the return of drier conditions. A broad upper level trough will bring showery weather back to our area into the end of the week.
Issued by National Weather Service Columbia SC 1220 AM EDT Tue May 13 2025 A front is pushing east across the region, with high pressure expected to return late week with rising temperatures. The cold front has moved through the area quicker than anticipated, leading to significantly lower areal coverage of shower and thunderstorm activity. A closed mid level low over the Ohio and Tennessee Valleys at the start of the period will continue to slowly lift north-northeast Tuesday into Wednesday, eventually opening up into a trough.
By tomorrow, a lee cyclone develops to the north, resulting in increasing westerly winds across the area (which have warranted a Wind Advisory for Eddy and Culberson counties and a High Wind Warning for the Guadalupes). These enhanced downsloping winds, coupled with ridging aloft, will cause temperatures to soar into the upper 90s and above 100 in some locations (especially along the Rio Grande and in the Trans-Pecos region). In fact, we will be in record "warm low" territory as the low-level jet persists and temperatures bottom out in the 60s and low 70s for much of the area once again.
221 AM MDT Tue May 13 2025 KEY MESSAGES: - Cold Front arrives this morning. With brief high pressure for a partially dry day.
(Today and tonight) The upper level low which has brought a lot of unsettled weather to the region will finally begin to move eastward today. Highs will generally be in the low to mid 80s with overnight lows in the mid 60s.
Under a stout upper level ridge and persistent southerly flow, afternoon temperatures will soar back into the low 80s to near 90 for much of the interior, hottest in the west and central downslope locations. A weakening low could touch off a few showers as it progresses northward through the Lower Great Lakes Wednesday.
(Today through Wednesday) The closed low will finally begin to move north-eastward today, while becoming elongated from northwest to southeast. There will be a brief window after sunrise that a few showers will be possible in the north and east, with the last ditch stretch of the upper low.
This will set up a lee trough to the east of the front range and increase the pressure gradient over the southern plains. This motion will serve to intensify the lee trough and further increase the pressure gradient.
213 AM MDT Tue May 13 2025 KEY MESSAGES: - Snow in the higher terrain of Lemhi county and southwest Montana this morning. These region remain in the base of the trough that originally spawned that cutoff low, and the snow levels have lowered allowing some snow accumulation in the mountains. Across the rest of the region, cooler temperatures aloft in the base of the trough are allowing it to get unstable during the day causing showers. This will keep it cooler than average with frequent showers, especially in the mountains. A broad trough over the region is causing showers today.
1153 PM CDT Mon May 12 2025 (This evening through Tuesday night) Tonight through the Wednesday morning, conditions will be quiet overall as high pressure builds in over the area.
1038 PM MDT Mon May 12 2025 - Warm, dry and breezy Tuesday, then windy and slightly cooler Wednesday with a few showers returning to the Central mountains.
(Today through Wednesday) A building 500mb ridge over South Texas will provide subsidence with well above normal daytime temperatures and breezy to windy conditions though Wednesday. At the surface, high pressure across the Gulf and low pressure across the Plains will produce an enhanced pressure gradient over the region through the period. Low temperatures tonight will be in the the low to mid 70s, which is a few degrees above normal.
Issued by National Weather Service Columbia SC 423 AM EDT Tue May 13 2025 A front is pushing east across the region, with high pressure expected to return late week with rising temperatures. The cold front has moved through the area quicker than anticipated, leading to significantly lower areal coverage of shower and thunderstorm activity.
- The next storm system will bring cooler weather and increased chances for PM shower and thunderstorm activity north of US-20 on Tuesday evening, and to a broader area Wednesday afternoon.
The mid/upper level low pressure system responsible for the rain and storms across the forecast area the past few days, will lift northeast of the region through tonight. This activity will dissipate in the late afternoon, as heating wanes and the low lifts further northeast and out of the region.
As the low lifts toward the northeast during the middle of the week, higher pressure will be able to fill in behind it, encouraging drier weather and slackening breezes.
357 AM PDT Tue May 13 2025 A broad upper level trough will gradually advance eastward, with drier conditions for areas other than the mountains Tuesday. As the main upper low shifts eastward today, expect that any showers will be limited to a few scattered over the higher terrain. High temperatures will remain in the lower to mid 60s for the interior, with mid to upper 50s for the coast and water adjacent locations.
- Pattern change on Wednesday as a cold front moves across in the afternoon.
- High pressure building into the region will bring about a prolonged period of dry but very hot weather.
In its wake, a drier northwesterly flow pattern aloft will develop as an upper ridge begins to build over the western Gulf. At the surface, high pressure starts to build over the Florida Peninsula, helping to maintain southwesterly winds across the area. Temperatures and dew points will be on the increase as ridging builds in and low-level moisture advects in from the Gulf. Highs today will reach the low to mid 80s, increasing to the mid to upper 80s for Wednesday. Lows tonight and Wednesday night will only drop into the mid to upper 60s inland to the low 70s along the coast.
Cooler temperatures arrive today and continue Wednesday before recovering through the end of the week. A strong Pacific mid-latitude cyclone is evident over northern California in mid-level WV imagery. Cooler temperatures will creep from west to east today, with most of northern AZ 5-10 degrees below normal by Wednesday.
644 AM CDT Tue May 13 2025 (Today through Wednesday) A building 500mb ridge over South Texas will provide subsidence with well above normal daytime temperatures and breezy to windy conditions though Wednesday. At the surface, high pressure across the Gulf and low pressure across the Plains will produce an enhanced pressure gradient over the region through the period. Low temperatures tonight will be in the the low to mid 70s, which is a few degrees above normal.
604 AM EDT Tue May 13 2025 (Today and tonight) The upper level low which has brought a lot of unsettled weather to the region will finally begin to move eastward today. Highs will generally be in the low to mid 80s with overnight lows in the mid 60s.
629 AM CDT Tue May 13 2025 (Today through Wednesday) The closed low will finally begin to move north-eastward today, while becoming elongated from northwest to southeast. There will be a brief window after sunrise that a few showers will be possible in the north and east, with the last ditch stretch of the upper low.
Quiet conditions to start the morning as high pressure begins to settle over the area.
519 AM MDT Tue May 13 2025 - Precipitation arrives today as a cold front begins to make its way through Eastern Idaho.
333 AM MDT Tue May 13 2025 KEY MESSAGES: - Cold Front arrives this morning. With brief high pressure for a partially dry day.
- Warmer and more humid weather returns this week.
Cooler and wetter weather pattern will stick around this week with several opportunities for showers and afternoon thunderstorms. Tuesday and Wednesday: A cool and showery pattern will persist through Wednesday as we remain under a cold upper level trough.
Low pressure will move into the Great Basin today with northerly flow taking hold over SW Oregon and northern California. Energy on the back side of the low will continue to generate isolated to scattered showers, some as far west as the coast and coastal waters this morning, but then mainly near the mountains and over the east side this afternoon/evening. We're expecting another cool day with highs in the low to mid 60s over the west side and in the low to mid 50s over the east side.
635 AM CDT Tue May 13 2025 - Mild and dry conditions expected this week - An active weather pattern is likely to emerge this weekend, increasing the potential for showers and storms; severe storms are possible as well As of 345 AM Tuesday morning, the stubborn cutoff low across the southeast US is moving to the northeast as midlevel ridging builds across the central CONUS. Further west, a trough axis has come ashore with cyclonic flow overspreading the central and northern high Plains.
619 AM CDT Tue May 13 2025 - Warmer and more humid weather returns this week.
For now, will keep temperatures in the middle 70s for afternoon highs (lower 70s in the higher elevations).
Gradual warming trend through the rest of the week as ridging dominates the NEPac. A warming trend begins today as large scale subsidence follows in the wake of the upper low.
- Pattern change on Wednesday bringing cooler temps, increasing winds, and moisture mainly for the high country and northern portion of the forecast area.
606 AM CDT Tue May 13 2025 Most of the precip has moved east of the CWA early this Tue morning as the closed upper low lifts slowly to the NE of AR. A clearing sky and light/variable winds on the back side of this upper low has allowed for temps to cool. POPs will become low for most areas with the upper low exiting further to the NE. Temps will increase further for Wed as upper level ridging increases over the region. A new cold front will drop SE into the state for Thu night.
(This evening through Wednesday Night) The upper-level low that has been helping bring cooler temperatures to the region has officially moved on. Clouds have largely moved out with the low, leaving us with a warmer and clear night tonight. The upper-level ridge will be firmly established over the Ark-La- Tx tomorrow.
Over the Central Plains, an upper-level ridge is continuing to build as another upper trough over the northwestern CONUS is moving into the Central Great Basin. At the surface, low pressure extends from eastern Colorado to Manitoba, resulting in southerly flow in our area.
- Warmer and more humid weather returns this week. (The rest of today ) Mostly clear skies were common across eastern Oklahoma and northwest Arkansas while weak mid level ridging was moving through the Southern Plains. Temperatures were responding by running on average about 2 to 10 deg warmer than 24 hrs ago. Through this afternoon, south southeasterly winds and mostly clear conditions will help temperatures to be warmer compared to yesterday with highs climbing into the mid/upper 80s for most locations.
115 PM CDT Tue May 13 2025 Most of the precip has moved east of the CWA early this Tue morning as the closed upper low lifts slowly to the NE of AR. A clearing sky and light/variable winds on the back side of this upper low has allowed for temps to cool. POPs will become low for most areas with the upper low exiting further to the NE. Temps will increase further for Wed as upper level ridging increases over the region. A new cold front will drop SE into the state for Thu night.
(Rest of today through Wednesday) Upper low will move from the Tennessee Valley through the Mid- Atlantic through the period. There may be just enough moisture to spark a brief shower along the east coast seabreeze this afternoon, otherwise low-level high pressure and deep-layer dry air will result in benign conditions tonight into tomorrow. Expect lows tonight in the low 60s across the interior, and closer to the low 70s along the coasts.
A few showers and storms expected tomorrow, but lesser coverage as our low pressure is exiting east. Tomorrow, our low pressure is moving off to our east.
Showers associated with an upper low centered over the area this morning will expand in coverage through the afternoon. Marginal instability will support isolated thunderstorms this afternoon, mainly in SW Idaho near the core of the low.
Warmer conditions will return for Wednesday. WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO A trough of low pressure currently over the Great Basin will continue to move east today. The main trough axis will be to our east by Wednesday but the region will maintain an overall troughing pattern with a ridge of high pressure building over the Eastern Pacific ocean.
(Rest of today and tonight) Warmer and a bit breezier today compared to yesterday. Mild tonight with temperatures expected to be a few degrees warmer than they were last night.
1053 AM MDT Tue May 13 2025 - Precipitation arrives today as a cold front begins to make its way through Eastern Idaho.
1251 PM CDT Tue May 13 2025 - Mild and dry conditions expected this week - An active weather pattern is likely to emerge this weekend, increasing the potential for showers and storms; severe storms are possible as well As of 345 AM Tuesday morning, the stubborn cutoff low across the southeast US is moving to the northeast as midlevel ridging builds across the central CONUS. Further west, a trough axis has come ashore with cyclonic flow overspreading the central and northern high Plains.
Low clouds have formed over the San Joaquin Valley as an upper- level trough of low pressure impacts our region. Cooler than normal temperatures with breezy to locally gusty conditions will occur once again today.
Ridging to the north of the eastern cutoff low is going to cause enough subsidence to keep the UP dry for yet another day. A weakening low could touch off a few showers as it progresses northward through the Lower Great Lakes Wednesday.
Temperatures have quickly climbed, already reaching the low to mid 80s area wide, and afternoon highs are forecast to peak in the mid to upper 80s.
The low pressure system to the south is causing wrap around precipitation across portions of north central Idaho into west central Montana. As the low moves off to the east the precipitation will be diminish throughout the night.
High pressure builds in over the Gulf at the surface, will keep the flow light and conditions dry and warm.
246 PM EDT Tue May 13 2025 A weak, broad area of low pressure and moisture over the Ohio Valley will move very slowly northeast across the Great Lakes and New England through the end of the week. The North Country likely stays dry in closer proximity to strong high pressure and associated dry air and subsidence over New England. On Wednesday, the upper level low weakens slightly, opening up to become a negatively tilted trough as it slowly lifts into the Great Lakes.
332 PM EDT Tue May 13 2025 The weather will remain quite unsettled as a slow moving upper low lifts from the Gulf States into the Ohio Valley through Wednesday. Small rain chances return this weekend ahead of a weak cold front. With the main trough axis now east of the area the way will be paved for NVA and height rises.
Issued by National Weather Service Caribou ME 346 PM EDT Tue May 13 2025 High pressure continues to drift east of New England through the week. The end of the work week into the weekend will feature yet another slow moving low pressure system that will increase rain chances.