Aikyam-Lab/Synoptic-Bench huggingface dataset:
This afternoon, broad upper troughing remained across the eastern CONUS with upper ridging over the southwest US. A perturbation ejects across the High Plains Wednesday night initiating another round of convection that could impact the area late Wednesday into Thursday.
Models are in rather good agreement activity will develop along instability axis/0- 3km lapse rates ahead of a cold front from eastern SD to n-central NE. Thursday Rather pleasant conditions on tap for this time of year in part to an upper ridge building in from the west.
307 AM EDT Wed Aug 5 2020 Increasing moisture along with an upper level trough and higher daytime temperatures today through the weekend will result in chances of showers and thunderstorms each day. Temperatures are on track with lows in the lower 70s. Surface flow will be out of the southeast with a weak boundary/trough stalled to the west and high pressure over the western Atlantic.
Today, expect northwesterly flow aloft to become more zonal as an upper ridge, currently located to our southwest, builds eastward.
246 AM CDT Wed Aug 5 2020 (Today and Tonight) Hot and dry weather continues today, as upper level high pressure centers over West Texas. Lee trough along the Texas and New Mexico border will bring occasionally gusty south winds mid morning through afternoon. Lows in the lower to mid 70s are expected tonight.
An upper level high pressure ridge over the Gulf of Mexico expanding west will push an upper level disturbance across the Peninsula today.
239 AM MDT Wed Aug 5 2020 High pressure will build over the region today with some weak energy and moisture moving through the west side of the ridge. This will produce a few showers or thunderstorms over the higher terrain and adjacent foothills this afternoon and evening. With weak shear, most storms will be confined to the higher terrain, although a few could slide off onto the lower elevations over the west this evening. High pressure begins to shift east on Thursday as an upper trough moves into the Pac NW. Convection will develop over the higher terrain Thursday afternoon and lift northeast through the area during the evening.
255 AM CDT Wed Aug 5 2020 Upper trough currently camped out over the eastern US, and that setup looks to stay put into the late weekend. Upper trough will help steepen lapse rate a bit in peak heating, but overall instability and shear both very low-end. This upper trough will very slowly flatten toward the end of the week, thus our temps will squeak up late in the week. On Sun, boundary to our south begins to lift north while upper ridge finally builds in late in the day.
Storm total precipitation is on the low side with QPF less than a quarter of an inch. Rain activity will diminish in the night as a weak ridge aloft builds in from the west. Aloft an upper level ridge is to our west with weak cyclonic flow aloft over the Northland.
155 AM EDT Wed Aug 5 2020 A cold front will stall over central NC through the rest of the work week, allowing a more typical summertime pattern of afternoon and evening thunderstorms to develop. As Tropical Storm Isaias continues to race northeast through New England and NE Canada tonight, cool high pressure will sink into the mid-Mississippi Valley. Although winds will generally be calm to light, they will generally back from southwest to northeast in the wake of the trough, with a slight drop in dewpoints as well. Today's cold front will stall across central NC tomorrow, allowing for scattered showers and thunderstorms to continue during the afternoon and overnight.
Another anomalously cool afternoon with highs only expected to reach the low 80s. Just a slight bump warmer on Thursday, with low 90s likely far the south near the developing warm front in the OK Panhandle.
A strong cold front will blast through the area on Thursday. Disturbances may jump ahead of the passing cold front and bring a threat of showers and thunderstorms Wednesday night into Thursday morning.
Temperatures will be much warmer on Thursday as upper ridging becomes centered over the Northern Plains, with a deepening trough upstream over the western CONUS. Forecast highs are in the lower 80s east to lower 90s west, with southerly low level flow. Severe potential is low for right now, with limited instability due to forecast dew points only in the low to mid 50s and shear only around 25 to 30 knots.
259 AM CDT Wed Aug 5 2020 Continued trough across the Eastern U.
Current temperatures are mainly in the lower to mid 60s. Highs will be in the 80s with lows in the lower to mid 60s.
Lake breeze passages today and Thursday will keep our lakeside communities about 3 to 6 degrees cooler than inland locales, with upper 70s and even some lower 80s becoming more prevalent inland on Thursday.
The Subtropical Ridge builds east over Texas today and Thursday. Subsidence under the Ridge and dry air aloft keep rain out of most all areas. With more influence of the Ridge, daytime temperatures trend up a little.
1240 AM EDT Wed Aug 5 2020 Building high pressure will return quiet, dry conditions today through tomorrow afternoon. Decreasing clouds southwest of Pittsburgh under building high pressure will create areas of fog (dense at times) due to radiational cooling. Near average temperature with mostly dry conditions is expected again Thursday under high pressure. A shower or storm could develop over the southeastern ridges during the afternoon as a southern stream low pressure interacts with a stalled boundary draped across the Mid- Atlantic. Ridging should increase across the central CONUS in response to another, digging Pac. NW trough.
Speaking of limited daytime heating, much of south-central MN's highs are forecast to be in the low to mid-70s. There is a slight possibility of showers occurring from the continued advection of warmer, moister air.
/issued 420 PM EDT Tue Aug 4 2020/ An upper trough will advance through the eastern states as Tropical Cyclone Isaias ejects northeast along the eastern Seaboard and into New England.
Light northerly flow persist over the TN Valley as high pressure builds behind a weak frontal boundary that moved through earlier in the day. The cold front and upper trough axis should push slowly into central and northeast AL on Wednesday into Thursday, but linger close enough to produce at least isolated afternoon and early evening showers or thunderstorms. Have continued to trend of forecasting highs about 2-3 greater than the suggested blend, with u80s-l90s at most valley locations both Wed-Thu afternoons (m80s atop the higher elevations). Later this week, the upper-level ridge over the Central Plains shifts eastward over the Tennessee Valley, decreasing our chances for showers and leading to a warming trend going into this weekend. Meanwhile, a strong upper-level trough pushes into the PacNW and British Columbia, which starts to break down this upper-level ridge over the weekend.
Another convectively active day expected as the FL peninsula remains on the western flank of the low-mid level Atlantic ridge.
Cooler conditions will continue across the region through Wednesday, as a trough moves into the region. Water vapor image shows a mid-level trough moving into northern California this evening. Inland highs today will be about 5-10 degrees cooler and a few degrees below normal for this time of year. The trough moves inland tonight but on the heels is another upper level trough approaching the Pacific Northwest.
High pressure is in store for the region today ahead of the system arriving on Thursday. Cooler temperatures are expected for Thursday with highs in the upper 60s across much of the area.
623 AM EDT Wed Aug 5 2020 Increasing moisture along with an upper level trough and higher daytime temperatures today through the weekend will result in chances of showers and thunderstorms each day. Surface flow will be out of the southeast with a weak boundary/trough stalled to the west and high pressure over the western Atlantic.
439 AM CDT Wed Aug 5 2020 Today through tonight: The persistent upper level trough over the ArkLaMiss region will slowly shift east in the near term.
308 AM MDT Wed Aug 5 2020 Current surface analysis shows low pressure over western ND, with frontal boundary stretching south across western SD and weak cold front to the northwest of the area. Low pressure and the fronts will sag slowly southeast through the region today, with winds becoming north to northeast and drier air moving in to the area. A weak disturbance moving through the ridge will interact with the front and produce showers and thunderstorms later this afternoon into tonight.
The front will head this way as a ridge of high pressure builds over the southern Plains, and a trough east of the Mississippi slowly exits toward the East Coast. Temperatures will remain below average, but will be warmer on Thursday than Wednesday as the aforementioned ridge nears.
942 AM CDT Wed Aug 5 2020 Skies are mostly sunny across the Mid-South this morning with temperatures in the low to mid 70s. Current temperatures are mainly in the lower to mid 60s. Highs will be in the 80s with lows in the lower to mid 60s.
Temperatures are ranging from the mid 50s to the lower 60s, with winds mainly light/variable.
Temperatures had already warmed into the low-mid 60s. As expected, lows this morning were quite cool for early August with readings in the low-mid 50s in the north and upper 50s in the south. To start the period, expect to find upper-level trough in place over the eastern CONUS while upper ridging holds firmly over the south- central CONUS. As we move into the weekend, the eastern trough is progged to lift to the northeast as the southern ridge expands eastward towards the region. At the surface, an area of high pressure will initially be centered over the lower Great Lakes region and then gradually drift eastward through the period. Temperatures will initially be on the cool side, with highs in the lower to mid 80s on Thursday, but then gradually warm back into the upper 80s and lower 90s by this weekend.
Today: Northeast Wisconsin will be on the southwest edge of upper- level troughing. High temperatures will warm up as southerly flow kicks in on the back side of the ridge and as the upper-level trough axis shifts eastward. The combination of WAA and slightly increased wind flow into the area, will help to keep temperatures a bit warmer than the past couple nights and allow daytime temperatures to warm well into the 70s to around 80.
Upper trough currently camped out over the eastern US, and that setup looks to stay put into the late weekend. Upper trough will help steepen lapse rate a bit in peak heating, but overall instability and shear both very low-end. This upper trough will very slowly flatten toward the end of the week, thus our temps will squeak up late in the week. On Sun, boundary to our south begins to lift north while upper ridge finally builds in late in the day.
608 AM EDT Wed Aug 5 2020 An area of high pressure building in from the Midwest will provide dry weather and relatively light wind through Thursday. Afterward, an upper level trough will move slowly southeast from the Great Lakes and help to form an area of weak low pressure along a stationary frontal boundary just to the south of Pennsylvania.
Warmer weather returns for the weekend. Upper trough pushing through NorCal has initiated unseasonably strong onshore flow with southwest wind gusts 20 to 35 mph. IR Sat is showing band of alto cu rotating north over the northern Sierra in front of upper low.
/issued 246 AM CDT Wed Aug 5 2020/ (Today and Tonight) Hot and dry weather continues today, as upper level high pressure centers over West Texas. Lee trough along the Texas and New Mexico border will bring occasionally gusty south winds mid morning through afternoon. Lows in the lower to mid 70s are expected tonight.
An upper level trough will bring relatively cooler air to northwest California Thursday, with a deep marine layer and more widespread and persistent coastal clouds.
Will go with persistence for the high temperature forecast for today.
Over the higher terrain, with the position of an upper level jet, there will be a chc of higher based showers and storms, especailly along and north of I-70. Models have the upper ridge axis right over the CWA on Thursday with weak zonal flow aloft.
1056 AM EDT Wed Aug 5 2020 Building high pressure will maintain quiet and dry conditions through Thursday afternoon. Shower thunderstorm chances increase across the ridges through the week's end, with temperature increasing through the weekend. Temperature will remain slightly below the climatological average under broad upper troughing. The exception would be across the eastern ridges, where daily shower and storm chances exist.
652 AM CDT Wed Aug 5 2020 An upper level ridge will be centered over the Rocky Mountain region with an upper level trough will be centered over Illinois/Indiana this afternoon and evening, placing Nebraska between the two. Surface moisture is decent, with dew points reaching the low 60s. On Thursday, the upper level ridge will move east to become centered over the High Plains.
311 AM MDT Wed Aug 5 2020 Upper ridging over the region will bring continuing warm and dry conditions over the next couple of days.
The higher moisture is looking to be concentrated in the eastern CWA but areas of more than 2.
Low pressure will move through California, triggering a few thunderstorms across northern Nevada over the next few days.
604 AM CDT Wed Aug 5 2020 An upper level ridge axis was located from west TX into the northern Rockies. Regional radar shows MCS exiting southwest and south central KS and into OK within this higher area of moisture. The longer term will focus on the return of convection and much warmer temperatures closer to normal and slightly above normal. Temperatures today will still be well below normal with highs from the upper 70s to mid 80s with the cooler readings up in central MO. Tonight, we'll begin to see some upper level energy move east across the top of the ridge and approaching the area from the west. Should see more cloud cover and warmer temperatures than currently with lows in the upper 50s in the eastern Ozarks to the mid 60s in the western portion of MO and southeast KS.
650 AM EDT Wed Aug 5 2020 A cold front will stall over central NC through the rest of the work week. Additionally, a cold front moving east across the mountains will push into central NC later today and stall across the Piedmont. This front will transport a slightly drier airmass to the Triad, with dewpoint temperatures remaining in the upper 60s to near 70 throughout the day, and the low to mid 70 dewpoints elsewhere. Lows overnight will range from the upper 60s in the Triad to the low 70s elsewhere.
/issued 259 AM CDT Wed Aug 5 2020/ Continued trough across the Eastern U.
Another hot afternoon expected as temps reach the low to mid 90s and peak heat indices between 100-103.
517 AM MDT Wed Aug 5 2020 Current surface analysis shows low pressure over western ND, with frontal boundary stretching south across western SD and weak cold front to the northwest of the area. Low pressure and the fronts will sag slowly southeast through the region today, with winds becoming north to northeast and drier air moving in to the area. A weak disturbance moving through the ridge will interact with the front and produce showers and thunderstorms later this afternoon into tonight.
243 AM PDT Wed Aug 5 2020 Afternoon temperatures will be a bit cooler today and tomorrow followed by a slow warming trend going into the weekend.
427 AM CDT Wed Aug 5 2020 An upper level ridge will be centered over the Rocky Mountain region with an upper level trough will be centered over Illinois/Indiana this afternoon and evening, placing Nebraska between the two. Surface moisture is decent, with dew points reaching the low 60s. On Thursday, the upper level ridge will move east to become centered over the High Plains.
Today is shaping up to be another sunny and warm day as high pressure remains over the region. On Thursday, an upper level trough will move inland along the Washington state/Canadian border. This will cause breezy conditions to develop as a tight pressure gradient forms between the cooler airmass to the west and the warm airmass to the east. Storms will be a mix of wet and dry, with the higher likelihood for rainfall across northwest Montana and the Idaho panhandle where a more significant moisture plume is expected.
Most folks west of the Plateau should remain dry with highs in the low to mid 80s.
/EC/ Today through tonight: The persistent upper level trough over the ArkLaMiss region will slowly shift east in the near term.
638 AM EDT Wed Aug 5 2020 One more day of unseasonably cool weather is at hand before temperatures trend warmer and rise above normal this weekend.
Showers/storms are expected to develop across parts of the High Plains into western KS this afternoon/evening and could move into NW portions of the fa late tonight. The highest rain chances are expected across northern and far eastern portions of the fa. Depending on how things evolve with the rain and clouds, high temperatures Thursday afternoon may end up cooler in some locations than currently forecast, but right now it looks like at least SW parts of the fa, where less of a chance of thick clouds and/or rain to occur, will likely be at or above normal for afternoon highs tomorrow.
Mostly sunny skies and high temperatures a little warmer are expected on Thursday with highs in the upper 70s.
Those chances for rain are diminishing very quickly in the high-res models, though. Otherwise, fair weather cumulus will fill the sky today across the region with highs in the mid 70s and cooler near the lake.
243 PM CDT Wed Aug 5 2020 Mid and upper-level ridging continues to grip much of the southwestern U. and Plains, while general troughing continues over the Great Lakes and Northeast. The benefit has been cooler and very pleasant conditions for the TN/OH Valley.
138 PM EDT Wed Aug 5 2020 Building high pressure will maintain quiet and dry conditions through Thursday afternoon. Shower thunderstorm chances increase across the ridges through the week's end, with temperature increasing through the weekend. Temperature will remain slightly below the climatological average under broad upper troughing. The exception would be across the eastern ridges, where daily shower and storm chances exist.
324 PM EDT Wed Aug 5 2020 A weak cold front drops to the south of our region tonight with high pressure moving in for Thursday.
A few spots south of the WK/BG Parkways were in the lower 80s. For Thursday, upper trough axis will still be overhead and we may see some scattered convection develop from the TN plateau northeastward into portions of SE KY.
Temperatures sunrise Thursday a few degrees warmer than recently, in the lower to mid 60s. After morning convection wraps up early Thursday in the SE zones, the daylight hours will be dry and warmer. Traditional hot and dry August weather will return during this period, courtesy of a dome of high pressure aloft expanding its influence across the plains.
Water vapor imagery this afternoon was showing an upper ridge in control over the western half of the CONUS. At the surface, low pressure was centered over SD with a trailing thermal boundary along the SD/NE border.
144 PM CDT Wed Aug 5 2020 The welcome relief from the summer heat continues today thanks to some influence from the 500mb trough over the eastern half of the US and cloud cover that has persisted much of the day across a good chunk of the CWA. This trough will continue to slide to the east this afternoon. The back side of the trough still has an embedded baroclinic zone within the NW flow aloft which is slowly moving eastward with the trough. This shift in the zone, combined with the cloud debris from the MCS this morning, is allowing for cooler temperatures this afternoon especially across the southeastern portion of Oklahoma. This increase in cloud cover will also allow for slightly warmer temps for tomorrow morning when compared to the past few days.
The cold front is expected to pass through the area on Thursday, producing another round of showers during the afternoon.
305 PM EDT Wed Aug 5 2020 The trough of low pressure that been over South Florida for the last couple of days that was formally associated with Isaias is slowly weakening this afternoon. The trough so be gone by Thursday allowing for high pressure over the Western Atlantic waters to build into the Florida Peninsula. Highs on Thursday will be in the lower to mid 90s except around 90 east coast metro areas. Environment looks favorable for the development of deep, slow moving convection with plenty of lightning and heavy downpours thanks to a mid-level trough.
335 PM CDT Wed Aug 5 2020 A 500mb trough continues to remain in place over the eastern half of the CONUS this afternoon and through tomorrow. Though that upper trough is slow to progress. high pressure is building in at the surface behind the front that slowly made its way to the Gulf Coast last night. but the forecast guidance is bringing up the high temps a degree or so above todays across Central MS and ArkLaMiss. The dewpoints will still be relatively low for August, in the 60s, but the heat indices will creep up into the low to mid 90s with that slight increase in temps. signaling an end to the lower temps and dewpoints of late.
225 PM MDT Wed Aug 5 2020 High pressure was building over the region today with some weak energy and moisture moving through the west side of the ridge. This was producing a few showers and thunderstorms over the higher terrain and adjacent foothills. With weak shear, most storms will be confined to the higher terrain, although a few could slide off onto the lower elevations over the west this evening. High pressure begins to shift east on Thursday as an upper trough moves into the Pacific Northwest. Convection will develop over the higher terrain Thursday afternoon and lift northeast through the area during the evening.
Another busy convective day for the Florida peninsula as we remain on the western side of the low-mid level Atlantic ridge.
Otherwise, tranquil conditions are expected tonight with ridging at all levels persisting. Ridging will remain in place through Thursday night keeping mostly dry conditions.
337 PM CDT Wed Aug 5 2020 Currently, remnants of Isaias continue to impact portions of the northeastern CONUS with a deep midlatitude cyclone churning over eastern Canada. An anticyclone remains over the Desert Southwest with northwest flow through the northern and central Plains regions. Another trough is impacting the west coast and the Pacific northwestern region.
Moist sw flow ahead of an upper trough to the west with convection moving north from central Florida will result in numerous showers/storms over mainly ne Fl this afternoon/evening. Expect isolated strong storms as cell and boundary collisions occur over inland ne Fl near the Highway 301 corridor.
A weak cold front has pushed southward across much of the forecast area and is currently draped from central SD along the NE/SD border back into eastern WY. An upper level ridge axis will slowly move over the northern Plains by Thursday morning with much warmer temperatures expected to end the week.
/Tonight through Thursday Night/ Nw flow aloft regime continues, as our region remains sandwiched between the upper ridge over W TX/NM and an upper trof axis positioned along the MS River. Trof axis to continue ewd as we move into Thursday, allowing the upper ridge to expand its influence further ewd into our area, at least to some degree. Expecting much warmer temps for Thursday, as convective coverage does not look to be quite as good as today's.
325 PM EDT Wed Aug 5 2020 Quiet weather continues today with large scale subsidence in the mid- levels as high pressure remains firmly overhead. This clearing will allow for significant radiative cooling to occur allowing temps to drop back into the lower 50's, aside from the Metro area or along the lakeshores which will see lows in the mid to upper 50's.