Aikyam-Lab/Synoptic-Bench huggingface dataset:
A strong high pressure system over the western states will remain in place through the Labor Day weekend delivering very warm daytime temperatures and mainly dry conditions. The axis of a strong high pressure system extended from central California into Colorado during the morning hours, forecast to remain in place through the Labor Day weekend. The strength and position of the high will deliver a mainly dry east to northeast flow to northern Arizona limiting any threat for thunderstorms. Not surprisingly, with such a strong high pressure system, very warm temperatures are in store. For the lower elevations of the Grand Canyon dangerous heat is on the way.
917 AM EDT Wed Aug 31 2022 High pressure in the Midwest will move slowly to the southeast and reach the western Ohio Valley this evening and settle over the CWA towards daybreak and linger through Thursday. The high moves east overnight in response to a deepening upper level trough in the Midwest. High pressure dominates the weather pattern tonight through Thursday. Dry air under the high allows for a sizable temperature spread, with the morning low dipping into the upper 50s and the afternoon high reaching the mid 80s.
As for temps, highs each afternoon is expected to be in the low to mid 90s across the area.
1015 AM EDT Wed Aug 31 2022 High pressure builds into the region today, bringing lower humidity. Dry, high pressure will dominate the region through the end of the week.
734 AM EDT Wed Aug 31 2022 A cold front passes offshore today, allowing high pressure to build in through the end of the week.
Forecast remains on track for a warmer day with high pressure and temperatures in the upper 80s and lower 90s. At the same time, the upper level ridge continues over the Northern US, this will allow the thermal ridge at 850mb to be over Montana and western North Dakota. All of these ingredients come together to produce high temperatures in the upper 80s in the southeast, and the low 90s in the west, closer to the thermal ridge.
620 AM CDT Wed Aug 31 2022 High pressure will filter into the area today. Today Through Thursday Night An upper high pressure system continues over the western U. with a trough over the northeast. The ridge will expand to the southeast across the southern U. Lows tonight will be in the lower 60s to the lower 70s and mid to upper 60s Thursday night.
With light northerly winds today behind the cold front over the Southeast, a cooler, drier air mass will be in place today with dew points dropping this afternoon. For the rest of the day, a beautiful day is in store with sunny skies, lower humidity, and near normal temperatures behind a cold frontal passage.
709 AM EDT Wed Aug 31 2022 Mostly dry and seasonable conditions should prevail under high pressure. Building high pressure should support dry conditions today. Thursday's highs will run several degrees warmer than today.
359 AM MDT Wed Aug 31 2022 The H5 ridge remains centered roughly over western UT this morning, keeping the air dry and winds light. Unfortunately, the trough will have little impact on our temperatures, which will nudge up yet another 3 to 5 degrees, with highs in the low 90s south and west, and upper 90s to around 100 for central basins. The extra heat may be able to bubble up a few showers along the spine of the Bighorn Range during the afternoon, but they will still be isolated, held back by subsidence from the ridge still in the vicinity.
Otherwise, drier air associated with a seasonably strong upper level trough over the eastern CONUS is expected to continue surging southward across the forecast area today. A surface cold front remains to our north, but eventually we'll see cooler and drier boundary layer air move in as the front pushes south through most of the area by tomorrow.
405 AM CDT Wed Aug 31 2022 Weak high pressure over the Missouri and mid Mississippi river valley today will settle east into the Ohio river valley on Thursday.
119 PM EDT Wed Aug 31 2022 A cold front will approach the area today.
Aloft tomorrow we will continue to be in northerly and northwesterly flow with ridging to the west and a large high pressure centered over the southwestern CONUS.
235 PM EDT Wed Aug 31 2022 High pressure then builds in from the north and west through late week or potentially all the way through the weekend. Dry air and subsidence, thanks to high pressure over the Ohio Valley, will keep our evening dry. It will be quite comfortable overnight with a clear sky and calm conditions allowing temps to fall into the lower 60s inland, perhaps giving the AC a break tonight. High pressure mentioned above drifts eastward Thursday across Pennsylvania. Mainly dry and seasonably warm conditions through late week and into the weekend as high pressure will dominate.
As the trough passes over the top of the ridge on Thursday, we will see some breezy conditions develop with wind gusts of 20-25 mph possible across most of the area. With the trough beating down the ridge slightly, we could see temperatures receded by a couple degrees, but not really enough to justify dropping the heat advisory just to end up reissuing by the weekend (more on this in the extended discussion).
Ridging aloft continues to nose eastward across the Plains, the Lower Mississippi Valley region, and into AL early this afternoon. Weak surface ridging also extends southeastward into much of our forecast area early this afternoon, but we still anticipate that a weak surface boundary/trough axis/seabreeze will develop and extend from coastal portions of southwest AL and into the western FL panhandle (and perhaps the vicinity of Covington county AL) during the mid to late afternoon hours. Hot and humid conditions can otherwise be expected this afternoon with high temperatures in the lower 90s over much of the area, except upper 80s to near 90 degrees along the immediate coast and beaches. Light N/NE winds will generally prevail this afternoon, except light southerly along the coast with a developing afternoon trough/seabreeze.
High pressure will build in tonight into tomorrow on the subsident southwest fringe of an exiting southeast Canada/Northeast US upper trough. This will allow dry, mild and mainly clear conditions to persist with highs tomorrow a few degrees warmer than today.
1228 PM EDT Wed Aug 31 2022 Mostly dry and seasonable conditions should prevail under high pressure. Building high pressure should support dry conditions today.
1008 AM PDT Wed Aug 31 2022 A strong ridge of high pressure will deliver very hot conditions through the end of the work week.
These hot and dry conditions are expected to continue across most of the region through the Labor Day weekend as a dome of high pressure settles over the southwest. There wasn't much as of 00Z either, but where there was, was over the weekend and whether or not further deepening of the western CONUS ridge would occur.
315 PM EDT Wed Aug 31 2022 High pressure in the Midwest will move slowly to the southeast and reach the western Ohio Valley this evening and settle over the CWA towards daybreak and linger through Thursday. The high moves east overnight in response to a deepening upper level trough in the Midwest. Weather will continue to be dictated by high pressure, light wind, clear skies, and a generally dry airmass as dewpoints rise slightly from the upper 50s to lower 60s.
413 PM EDT Wed Aug 31 2022 Dry and seasonable weather should prevail under high pressure. No appreciable change was needed for the near term forecast as high pressure will support dry conditions tonight.
This forecast is very close to the bias corrected guidance blend which is warmer than the NBM 50th percentile and the guidance blend.
With the onset of tonight, cooler temperature should result in the above mentioned clouds fading. Low temperatures show this, cooling into the lower 60s most spots.
1214 PM CDT Wed Aug 31 2022 High pressure is currently dominating our sensible weather as it continues to move southeast through the region. Again, river valley fog is likely as the discrepancy between cool air temperatures and warmer water temperatures increases overnight.
High pressure is in place aloft and will remain into the day Thursday as well, so it looks like we are going to start off September with another pleasant day.
High pressure will filter into the area today. Today Through Thursday Night An upper high pressure system continues over the western U. with a trough over the northeast. The ridge will expand to the southeast across the southern U. Lows tonight will be in the lower 60s to the lower 70s and mid to upper 60s Thursday night.
There is a weak sfc trof axis located across northeast Colorado this afternoon. Enough convergence along this boundary has resulted in some weak showers and storms across the high plains of eastern Colorado. Weak lee troughing, light SE/S winds, above normal hot temps, and dry conditions.
A cold front is forecast to move into the region Thursday evening with a 15% chance of rain for north central and eastern North Dakota.
A strong high pressure system over the western United States states will remain in place through the Labor Day Weekend.
Highs tomorrow will be a bit warmer, topping out in the mid to upper 80s.
Backed mid-level flow e of mid-level cyclonic circulation will keep rich mid-level theta-e ridge parked across CWFA.
200 PM EDT Wed Aug 31 2022 High pressure in the Midwest will move slowly to the southeast and reach the western Ohio Valley this evening and settle over the CWA towards daybreak and linger through Thursday. The high moves east overnight in response to a deepening upper level trough in the Midwest. Weather will continue to be dictated by high pressure, light wind, clear skies, and a generally dry airmass as dewpoints rise slightly from the upper 50s to lower 60s.
Flat fair weather cumulus humilis are drifting across the area, mostly east of I-75 where rainfall coverage with yesterdayâs cold front was greater. At the lower elevations, temperatures range from a 78 at the Knott County mesonet up to 83 at Middlesboro. A glance at the weather maps shows the 500 H trough associated with yesterdayâs cold front now shifting across New England and off over the western Atlantic.
These warmer temperatures will continue through the weekend.
and Thursday A weakening cold front will sag south through the area today; however due to lack of moisture precipitation is not expected as the front tracks through the area. Since the front will move through north-central Wisconsin earlier in the day, highs will be several degrees cooler than central and east-0central Wisconsin. High pressure will become established across the Ohio River Valley tonight into Thursday, as winds turn southwesterly on Thursday across the western Great Lakes region. This will bring warmer temperaturs into the region as 850 mb temperatures recover into the middle teens. Lows tonight are expected to be in the 50s with highs on Thursday expected to rise into the lower to middle 80s away from the lakeshore.
Conditions will trend warmer and more humid over the weekend with a shower or thunderstorm possible into Labor Day. A mid-upper level thermal trough will be pivoting through southern ONT/QUE this afternoon, generating periods of clouds and sunshine over much of the CWA.
/issued 958 AM CDT Wed Aug 31 2022/ Skies are sunny across the Mid-South this morning with temperatures from the lower 70s to lower 80s. A cold front, currently over north Mississippi is almost out of our area leaving behind pleasant dewpoints to our north. Temperatures will be in the in 90s but dewpoint temperatures will be in the low 60s. Lows tonight will be in the lower 60s. Dewpoint temperatures will yet again be in the low 60s for most of the day.
256 PM EDT Wed Aug 31 2022 High pressure over the area means drier weather and lower humidity through Thursday. A slight increase in low-level moisture is shown in the guidance, as high pressure shifts east slightly and brings the 850 mb flow around out of the E/SE.
End of Week: A cold front will begin to dip towards northern FL over the next couple of days. Surface ridging expect to build back over the peninsula bringing a back a more noticable E flow, and earlier convection for central counties that moves towards the west coast in the evening hours.
1146 AM CDT Wed Aug 31 2022 (Today through Thursday night) High pressure will continue to dominate the Salt Lake area with a low south of the AZ/NM area. The position of the low will allow for continued moisture transport from the Gulf to the southern Panhandles.
This evening, showers and storms should wane across our southern counties as the upper low pushes westward into northern Mexico and should have much less impact on our weather. Overnight, skies will remain mostly cloudy, if not overcast, with lows in the low 70s. Tomorrow, an upper- level trough will dip into central Texas from the central Plains. Skies will remain mostly cloudy for much of the day, which should hold temperatures in the low to mid 80s. The best coverage will be mainly across the Big Country as moisture interacts with the weak frontal boundary, and our southwest counties, where remnants of the upper low will help initiate storms.
1247 PM MDT Wed Aug 31 2022 Ridge of high pressure will keep hot dry conditions in place this afternoon. Should be a few more clouds tomorrow compared to today but that won't impact temperatures much with highs in the upper 90s to the lower triple digits. A disturbance crossing west to east well north of the Canadian border will drag a weak cold front through the area late afternoon into the evening hours tomorrow.
Weak ridging will persist through the week, and a mid-latitude trough is keeping the ridge axis suppressed near South Florida. The current placement of the ridge axis will keep winds relatively light through at least Thursday night.
212 PM CDT Wed Aug 31 2022 Summary: High pressure remains over the region providing plenty of sunshine and warming temperatures.
Nudged afternoon temperatures up a degree or two; forecast highs now range from 80 over the ridges north of I-64 up to 85 in the Middlesboro Basin. This dome of high pressure has kept skies clear overnight and with clear skies and remnant moisture from this morning's cold front, patchy dense river valley fog has developed. The high pressure will also keep temperatures slightly cooler and also keep humidity relatively low through the day today.
1113 AM MDT Wed Aug 31 2022 Current upper air analysis and WV imagery shows a strong ridge in place over the western US and northwest flow over the northern plains. The dry and warm pattern continues as the ridge stays in place over the west.
The high will begin to move east overnight, allowing winds to shift back to the south and warm air advection to kick in. Temps should be a few degrees warmer than today, both in the early morning and at peak heating.
244 PM MDT Wed Aug 31 2022 Upper ridging is persisting across the western CONUS, with WNW flow across the Dakotas.
1101 AM EDT Wed Aug 31 2022 A cold front passes offshore today, allowing high pressure to build in through the end of the week.
358 PM EDT Wed Aug 31 2022 A cold front will move through the region on Thursday, then will stall south of the area.
201 PM CDT Wed Aug 31 2022 Today began with widespread lows in the lower to mid 50s, and a feel of fall in the air. This afternoon, we have increased humidity through transpiration with dewpoints in the lower 60s and with deep mixing, temperatures have reached the lower to mid 80s as of 2 PM.
(This afternoon through Thursday night) An upper level ridge is over the Desert Southwest with an upper low over northern Mexico. This upper low is resulting in increased upper lift and moisture across West Texas and Southeast New Mexico.
1223 PM CDT Wed Aug 31 2022 Mild, dry and sunny weather will continue across the area under the influence of high pressure today and again Thursday. Temperatures today will be a few degrees warmer than those observed yesterday, with readings generally expected to be in the low to mid 80s with a continued westerly wind. Otherwise, after a quiet and cool night tonight, inland temperatures on Thursday will be a touch warmer, with mid 80s likely for most areas. Closer to the lake, however, slightly cooler conditions are likely due to the expectation for an afternoon lake breeze.
1105 AM MDT Wed Aug 31 2022 The H5 ridge remains centered roughly over western UT this morning, keeping the air dry and winds light. Unfortunately, the trough will have little impact on our temperatures, which will nudge up yet another 3 to 5 degrees, with highs in the low 90s south and west, and upper 90s to around 100 for central basins. The extra heat may be able to bubble up a few showers along the spine of the Bighorn Range during the afternoon, but they will still be isolated, held back by subsidence from the ridge still in the vicinity.
306 PM EDT Wed Aug 31 2022 (Through Thursday) A cold front will be stalled across SE GA this afternoon and evening, with high pressure centered to the southeast. Showers and storms will continue to develop this afternoon due to diurnal heating, with a focus of activity along the leading edge of the cold front, and along the east coast sea breeze. This front will dissipate during the day on Thursday, as weak high pressure builds to the east.
Intervals of sunshine are still quite possible Fri afternoon as lower trop moisture mixes out, but low level winds are forecast to turn to the south Thu night, allowing a modest increase in moisture and therefore surface dewpoints, from around 60, into the lower 60s, and eventually the middle 60s.
Aloft, a large upper-level ridge is centered across the southwestern US, and northwest flow persists across the Northern Plains.
The morning weather balloon from KBOI showing 3-6F degrees of warming in the low levels over the last 24 hours.
303 PM EDT Wed Aug 31 2022 Gusty westerly winds (30-35 mph) this afternoon are helping to dry out the surface/near surface moisture with surface dew pts now in the 50s as temperatures have climbed into the lower 80s.
(This evening through Thursday) In the upper levels, a ridge is over the Western U. and a broad trough is over the Central and Eastern U. At the surface, high pressure centered over the Ohio Valley tonight will drift northeast slowly tomorrow. POPs will be near zero with the exception of a low chance for a shower in the higher elevations of the East Tennessee Mountains. Temps will be cooler tonight in the upper 50s and lower 60s.
123 PM EDT Wed Aug 31 2022 High pressure will dominate the region through the end of the week. The high pressure builds overhead later tonight and dry air and light winds should allow good radiational cooling, so for places like Burkes Garden and Mountain Lake, temps could reach the mid to upper 40s. Airmass should warm fairly quick reaching the 80s in the afternoon, with 70s across the higher ridges.
Currently, high pressure was over northern Missouri.
*High heat risk west of the mountains and in the High Desert, moderate heat risk in mountains and low deserts.
1231 PM CDT Wed Aug 31 2022 (Today and tonight) A weak upper level low is located across far West Texas early this morning, with another weak low across Central Texas. In addition, a weak cold front is located just north of the Big Country. Expect highs generally in the low to mid 80s across the region.
Temperatures have warmed into the mid 80s (as of 17Z), and are expected to reach the lower 90s this afternoon. Forecast remains on track for a warmer day with high pressure and temperatures in the upper 80s and lower 90s. At the same time, the upper level ridge continues over the Northern US, this will allow the thermal ridge at 850mb to be over Montana and western North Dakota. All of these ingredients come together to produce high temperatures in the upper 80s in the southeast, and the low 90s in the west, closer to the thermal ridge.
Quiet weather is expected through tonight with nearby weak high pressure. Through Tonight: Expect a quiet and seasonable evening across the region has with high pressure nearby.
302 PM CDT Wed Aug 31 2022 (Issued 302 PM CDT Wed Aug 31 2022) Tonight and Thursday night: The pleasant summer weather and breezy northwest winds will continue this afternoon ahead of an approaching ridge. Increased mixing this afternoon has brought dewpoints down into the low 50s to low 60s. The lower dewpoints this evening paired with the clear skies and light winds will allow for temperatures to fall into the mid 50s again tonight.
426 PM MDT Wed Aug 31 2022 Upper ridging is persisting across the western CONUS, with WNW flow across the Dakotas.
647 PM CDT Wed Aug 31 2022 Quiet evening in store with high pressure and clear skies dominating the region. The high will begin to move east overnight, allowing winds to shift back to the south and warm air advection to kick in. Temps should be a few degrees warmer than today, both in the early morning and at peak heating.
The high remains in the area tonight, shifting slightly east. The low levels are drier tonight than last night, so we think valley fog will be less common. This will bring a gradual return of the low level moisture with temperatures warming up a few degrees as well. Lows bottom out in the low to mid 60s.
802 PM EDT Wed Aug 31 2022 Dry and seasonable weather should prevail under high pressure. No appreciable change was needed for the near term forecast as high pressure will support dry conditions tonight.
Highs will start to bump up tomorrow and will be about 3 to 7 degrees warmer than today and range from 98 to 107 in the Valley and foothills.
Mean layer ridging centered over the Plains extends to the southeast across Florida into the western North Atlantic. Water vapor imagery highlights a couple upper level weaknesses in the ridge, one over the Florida Panhandle and the other centered over the Bahamas. High pressure over the western North Atlantic will result in gentle to occasionally moderate easterly breezes across the coastal waters of the Florida Keys for the next several days.
Weak southerly return flow begins to set in tonight, but forecast soundings still are showing the lowest 3-4 kft of the atmosphere falling to 10 kts or less for wind speeds after 06-09Z.
(Through Thursday) A cold front will be stalled across SE GA this afternoon and evening, with high pressure centered to the southeast. Showers and storms will continue to develop this afternoon due to diurnal heating, with a focus of activity along the leading edge of the cold front, and along the east coast sea breeze. This front will dissipate during the day on Thursday, as weak high pressure builds to the east.
545 PM EDT Wed Aug 31 2022 High pressure over the area means drier weather and lower humidity through Thursday. A slight increase in low-level moisture is shown in the guidance, as high pressure shifts east slightly and brings the 850 mb flow around out of the E/SE. Latest CAM runs depict little to no convective coverage even across the high terrian.
751 PM EDT Wed Aug 31 2022 A cold front will move through the region on Thursday, then will stall south of the area.
718 PM EDT Wed Aug 31 2022 High pressure will dominate the region through the end of the week. At the surface, high pressure is building east into the central Appalachians. The high pressure builds overhead later tonight and dry air and light winds should allow good radiational cooling, so for places like Burkes Garden and Mountain Lake, temps could reach the mid to upper 40s. Airmass should warm fairly quick reaching the 80s in the afternoon, with 70s across the higher ridges.
639 PM CDT Wed Aug 31 2022 High pressure sits over North Dakota, with the center drifting southeast into northeast South Dakota. A cold front is forecast to move into the region Thursday evening with a 15% chance of rain for north central and eastern North Dakota.
736 PM EDT Wed Aug 31 2022 (This evening through Thursday) In the upper levels, a ridge is over the Western U. and a broad trough is over the Central and Eastern U. At the surface, high pressure centered over the Ohio Valley tonight will drift northeast slowly tomorrow. POPs will be near zero with the exception of a low chance for a shower in the higher elevations of the East Tennessee Mountains. Temps will be cooler tonight in the upper 50s and lower 60s.