Aikyam-Lab/Synoptic-Bench huggingface dataset:
743 PM EDT Thu Sep 3 2020 A few showers are expected tonight as a cold front moves over the region. High pressure will provide dry weather and seasonable temperature through the weekend. The primary cold front will cross the region overnight, and will reach the southeast ridges by 12Z Friday. Cooler air will start to work into the northwest by sunrise with temperature dropping into the 50s, with lower 60s across the southeast counties. A shower or two may linger in the southeast ridges Friday morning as the front completes its passage. Otherwise, high pressure will dominate over the Ohio Valley this period under a broad upper trough. A drier and cooler air mass taking hold will keep temperatures near or just below normal.
Northeast Montana is now behind the cold front that arrived overnight.
821 PM CDT Thu Sep 3 2020 High pressure has kept convection north of the TN Valley today and we will remain dry overnight as well. Will continue to mention isolated to scattered rain and thunderstorms along the front Friday afternoon, and then a sigh of relief as a drier, cooler airmass begins to filter in overnight.
1210 AM CDT Fri Sep 4 2020 Cold front continues to sink south through the forecast area this afternoon. Patchy fog is possible tonight as well, especially in the river valleys due to the warmer water temperatures versus the colder air temps expected. Lows tonight will be in the low 50s to low 60s with highs on Friday in the upper 70s to low 80s.
This will make for very pleasant early Fall conditions with highs in the lower 80s and low relative humidity. By Saturday, the high pressure shifts east of the area and WAA gets underway.
219 AM EDT Fri Sep 4 2020 Dry and hot conditions expected today with an upper level ridge over the area. A cold front will move south through the area tonight and become stationary south of the area.
Temperatures were 10-15F cooler than yesterday, in the lower 70s. Upper high pressure will dominate the weather through Friday, keeping mostly clear skies and fairly light winds. The next cold front (weaker than the last one) is expected to move through northern and western portions of the area Saturday afternoon and across the rest of the area Saturday evening.
ridge west and trof east. Mid-level heights should continue to build slowly over the region through Friday night as ridge shifts subtly to the east. We'll start out 12Z Saturday with the persistent 500mb high near the 4-corners region, and northwesterly flow across the Dakotas and Minnesota thanks to the low near Hudson Bay keeping a trough across the eastern U. They could become breezy over central SD in the afternoon, as relative humidity values fall into the 20 to 30 percent range and temperatures rise into the low to mid 90s in the same location. This upcoming cold front, like the last one, looks to be mainly dry.
As a result of the low dewpoint depressions, light winds, and clear skies, fog is developing as anticipated. Upper level height falls will overspread the region today as a cold front moves south out of the Ohio valley. High pressure at the surface moves into the Ohio valley with winds quickly veering to the north behind the front.
A cold front will move through the terminals during the daylight hours today which could bring a shower or storm to the terminals.
With a weakening gradient overnight as surface ridging builds across the region, winds will drop off to nearly calm by mid evening. High pressure drifts off to the east on Friday, and with warm air advection temperatures will moderate a good bit as readings climb back into the 80s. Although winds are not expected to be especially breezy in the afternoon, the warmer temperatures will result in afternoon dew points near 30 percent, so elevated fire danger will again be a concern. On Saturday night moisture continues to increase while a warm front lifts close to our area.
Issued by National Weather Service Billings MT 214 AM MDT Fri Sep 4 2020 Strong upper level ridge will yield dry weather w/o too much wind today. On Saturday, winds aloft and mixed wind potential will increase in response to a flattening of the ridge.
408 AM EDT Fri Sep 4 2020 A cold front will move east of the area this morning with much cooler and breezy conditions today and Saturday. Early this morning a cold front and showers along this boundary was located to the east of the region. Drier, cooler, almost blustery northwesterly flow will build into the region today and cold advection will continue into tonight. With the high pressure overhead, dry conditions will prevail through the weekend though cloud cover is possible due to the exiting cyclonic flow aloft. Pleasant temperatures will continue through the weekend with highs in the low to mid 70s Saturday.
313 AM EDT Fri Sep 4 2020 As of 630Z, regional observations place the SW-NE oriented cold front just north of the Ohio River. Cold front will continue to push SE across central KY this morning and pass to our east later this afternoon with clearing skies and lower dew points in its wake. Highs today should reach into the low 80s for most. Broad high pressure is expected to hold sway across the region for much of this forecast period. Mostly sunny skies are expected for Saturday with highs in the upper 70s to the lower 80s. Lows Saturday night look to drop into the low-mid 50s.
Meanwhile, the sheared upper low over the Arklatex region will provide a chance for a few showers/storms across southeast Oklahoma today, perhaps into this evening.
Our TYR/GGG and LFK terminals could be the trouble spots with VCSH or VCTS through the overnight and predawn hours given the proximity of an upper level trough in the vicinity. While a true low-level jet is not anticipated to develop tonight, model guidance does suggest southerly winds just above the surface will increase slightly on the eastern periphery of the upper trough over Texas.
347 AM CDT Fri Sep 4 2020 Quiet weather will continue through Saturday as very strong high pressure remains over much of the western and central US. In addition to dry conditions, this high pressure will allow for warm air advection to surge northward into the northern and central Plains. Moderate winds on both Friday and Saturday afternoons will keep heat indices slightly cooler than forecasted highs on both days.
149 AM EDT Fri Sep 4 2020 A cold front is expected to cross the area tonight and tomorrow morning. In the wake of that cold front, high pressure is expected to build in from the north, brining tranquil conditions through at least the weekend. A secondary, but stronger, cold front is expected to arrive later today in our region, this will usher in much stronger dry and cold air advection.
352 AM CDT Fri Sep 4 2020 Surface analysis depicts the ridge extension of the Bermuda High over the Gulf States is flattening out in deference to some mid-level troughing taking place in the upper latitudes. There should be enough weakening of the ridge spline to allow a frontolytic trough to move through this weekend, thereby replacing the high a more continental airmass.
Showers have continued through the night from central Webb county to near Victoria as the mid-level trough and its surface reflection linger to the north.
327 AM EDT Fri Sep 4 2020 Dry and hot conditions expected today with an upper level ridge over the area. A cold front will move south through the area tonight and become stationary south of the area.
1153 PM EDT Thu Sep 3 2020 A few showers are expected tonight as a cold front moves over the region. High pressure will provide dry weather and seasonable temperature through the weekend. The primary cold front will cross the region overnight, and will reach the southeast ridges by 12Z Friday. Cooler air will start to work into the northwest by sunrise with temperature dropping into the 50s, with lower 60s across the southeast counties. A shower or two may linger in the southeast ridges Friday morning as the front completes its passage. Otherwise, high pressure will dominate over the Ohio Valley this period under a broad upper trough. A drier and cooler air mass taking hold will keep temperatures near or just below normal.
Deep layer ridging will prevail through the period, with dry air in place across much of the region.
Weak cold front pushing through NE OK at present will stall later tonight near I-40. Behind the front expect some slightly cooler temperatures in the morning and some gusty winds out of the north.
1234 AM CDT Fri Sep 4 2020 An area of high pressure will slide into eastern Nebraska this evening behind this mornings cold front. went with the lower end of guidance for lows to start the day on Friday. expect southwesterly winds to develop and for warmer temperatures to return to the local area. the EC is now shifting the upper level low it cuts off further east.
415 AM EDT Fri Sep 4 2020 Dry, cool and less humid conditions will prevail today with highs in the lower to mid 70s as a high pressure area builds into the region.
An upper level trough remains over South Central Texas early this morning. Showers and thunderstorms will gradually increase this morning due to a moist airmass and weak upward forcing from the trough and MCVs. Expect showers and thunderstorms to wane tonight with loss of heating while the upper level trough gradually weakens and drifts to the southwest. Isolated to scattered showers will redevelop on Saturday due to heating and weak upward forcing from the trough of a moist airmass.
111 AM EDT Fri Sep 4 2020 Another hot day today, before a cold front brings cooler and drier air into the upcoming Labor Day weekend. The mid level ridge remains just to our south and east though at the surface a cool front will approach from the northwest. A welcomed cold front will bring more seasonable temperatures and drier air on Saturday. High pressure will build into the Mid- Atlantic throughout the day.
Placement of where this complex develops remains in question, especially considering the orientation of the low level jet.
309 AM CDT Fri Sep 4 2020 Short term forecast is quiet as upper level high pressure remains anchored to our west. Temperatures today should be similar to slightly below what we saw yesterday with most areas in the lower 90's. Warmer temperatures aloft this afternoon will keep the atmosphere capped therefore no rain chances. /WCI The Labor Day weekend will be dominated by the very strong Four- Corners upper level high pressure ridge, with an axis across the Texas Panhandle and South Plains.
356 AM CDT Fri Sep 4 2020 (Today and Tonight) Weak upper low set to retrograde slightly to the southwest over the next 24 hours, increasing the rain chances again across the southeast half of the area. CAMs suggest that at least scattered showers and storms will redevelop today a little farther west than in previous days, although the Hill Country counties will still see the highest POPs. Otherwise, the increase in cloud cover should keep temperatures down a few degrees this afternoon, more in the low to mid 90s.
Once isolated showers diminish Friday morning expect a mainly dry and slightly warmer day. We expect widespread low in the lower to mid 40s, with some upper 40s around the Minot area. Friday will be a bit warmer as the h500 ridge axis broadens and moves slowly east. High temps are expected to reach the lower 90s across the southwest with minimum RH in the 15-20 percent range. Wind speeds will be critical, and the strongest winds will be east of the lowest RH, in south central North Dakota.
216 AM MDT Fri Sep 4 2020 The upper level ridge will be centered over NV/UT today with a weak and subsident northwesterly flow aloft. Temperatures will climb back into the lower 90s across the urban corridor and northeast plains.
Wind speeds will be on the light side tonight under fairly clear skies, so kept lows on the cooler side of guidance.
245 AM CDT Fri Sep 4 2020 Cold front currently extending from the great lakes down into OK is on the move, and is expected to cross the mid-state late this morning/early afternoon. By mid-week, a fairly good upper jet looks to carve out an upper low across the western US, which will remain west of the Mississippi well into late week. A cold front will move through the terminals during the daylight hours today which could bring a shower or storm to the terminals.
311 AM CDT Fri Sep 4 2020 Cold front currently stretches from southern MO into far northeast OK and into the TX Panhandle. In the upper levels, a broad upper trough is in place from Ontario and through the Ohio Valley, with upper ridging over the southwest CONUS. For Sat and Sun, upper ridge over the Desert Southwest is expected to expand west, into the southern High Plains with unseasonably strong northwest flow from the northern Rockies into the Great Lakes region.
1020 PM CDT Thu Sep 3 2020 (This evening through Friday) Based on latest observations, a cold front had passed just south/east of Buffalo and was approaching Freedom and Woodward. Some areas of western Oklahoma and western north Texas will reach the low 90s.
306 AM EDT Fri Sep 4 2020 The ridge axis continues to slowly push north leaving most of the area in easterly flow.
High pressure has kept convection north of the TN Valley today and we will remain dry overnight as well. Will continue to mention isolated to scattered rain and thunderstorms along the front Friday afternoon, and then a sigh of relief as a drier, cooler airmass begins to filter in overnight. High pressure will keep conditions dry and cooler on Saturday, making for a beautiful start to the holiday weekend.
144 AM EDT Fri Sep 4 2020 A cold front will move east of the area this morning with much cooler and breezy conditions today and Saturday behind the front. a cold front extended roughly from Jamestown to Rochester to Watertown with a narrow line of showers along this boundary. Drier, cooler, almost blustery northwesterly flow will build into the region for Friday and cold advection will continue into Friday night. With the high pressure overhead, dry conditions will prevail through the weekend though cloud cover is possible due to the exiting cyclonic flow aloft. Pleasant temperatures will continue through the weekend with highs in the low to mid 70s Saturday.
Issued by National Weather Service St Louis MO 1037 PM CDT Thu Sep 3 2020 Early this afternoon, the low-level stratus deck from this morning has given way to a field of scattered cumulus across most of the area. An attendant cold front from this system was draped back across the upper midwest into northwestern Missouri. The aforementioned cold front will be the focus of the forecast for later this afternoon into early tonight as it passes through the area from northwest to southeast. High temperatures in the low to mid 80s and drier dewpoints in the 50s are in store with no precipitation. High temperatures will be slightly warmer than Friday, with highs in the upper 80s for the western CWA and mid 80s over the eastern CWA.
453 AM EDT Fri Sep 4 2020 A Cold front will drop south through the Ohio Valley early this morning with high pressure building into the region today. This high will last through the weekend, keeping the forecast dry with below seasonal temperatures to start.
Despite plenty of solar insolation this afternoon highs will be slightly cooler due to weak cold air advection behind the cold front.
307 AM EDT Fri Sep 4 2020 Dry and less humid weather is expected through the weekend as high pressure builds behind the passage of a Friday morning cold front. A band of clouds should continue to track SE across the region this morning with a crossing cold front. A clearing trend is expected after the passage of the front as high pressure builds under a broad upper trough. Dry weather is expected through the period as high pressure moves east across the Upper Ohio Valley region, under a persistent broad upper trough. Model ensembles indicate an upper high should retrograde across much of the Eastern CONUS through mid week, as a deepening trough develops across the Central CONUS. This should maintain generally dry and warmer weather across the Upper Ohio Valley region.
1122 PM MDT Thu Sep 3 2020 Dry conditions will hold over the CWA through the weekend with an upper high holding over the sw CONUS, keeping the CWA under a dry nwly flow aloft. The cool front that passed across last night will wash back east overnight allowing for warmer temperatures to return Friday.
352 AM EDT Fri Sep 4 2020 Upper level ridging will slowly shift to the southwest across south Georgia and north Florida through the short term period.
The upper high will continue stretching eastward increasing heights across the region. Current analysis shows an upper-level trough over central Texas, and an upper-level ridge over CA/NV with an upper low centered over the Alaska Peninsula.
1214 AM CDT Fri Sep 4 2020 A strengthening low pressure system centered north of the Great Lakes has kept breezy northwest winds going across the area. As the low moves off to the northeast tonight the winds will become light. Lows tonight will be mainly in the 40s, except for the low 50s in the Twin Cities metro area. Saturday night temperatures will be in the upper 40s and low 50s with mostly clear skies as high pressure continues to build.
1247 AM EDT Fri Sep 4 2020 Look for dry, cooler and less humid weather for the start of the holiday weekend.
The region will be between high pressure to the east and a cold front to the north Today. The cold front will sink south across region Tonight, and stall through Saturday.
A weak warm front will lift northward across the state today. The net result is warmer temperatures with highs a few degrees centered around 90F. For tonight, weak lee troughing will continue across the High Plains. With the higher dewpoints and the light southerly winds continuing through the overnight hours. The mid level ridge that is centered across the Great Basin will edge ever so slightly closer to the Central Plains over the weekend. At the surface, continued lee troughing will prevail.
High pressure will remain locked in across the Great Basin through the end of the week.
236 AM EDT Fri Sep 4 2020 Cold front brings scattered showers today. High pressure with fair weather for the weekend. Low stratus across along and east of I79/US 119 corridor will lift this morning as the cold front approaches. Ample sunshine on Saturday along with the low RH air will create for a pleasant day with many locations topping out in the upper 70s to lower 80s.
209 AM EDT Fri Sep 4 2020 Cold front moves through tonight with minimal chances for precipitation. High pressure builds on Friday and lasts through the weekend, keeping the forecast dry with below seasonal temperatures to start.
345 AM CDT Fri Sep 4 2020 As of 08Z Friday morning a stout midlevel ridge continues to dominate the western third of the US, while troughing continues across the eastern two-thirds. Surface ridging will slowly progress eastward today, yielding mostly sunny skies and dry conditions. The aforementioned western ridge axis will regress westward, allowing a more-active pattern to setup across the forecast area.
Tonight through Friday: Dry high pressure is expected to build into the area for this time period, which will allow much of the area to remain precipitation free. Aloft, a troughing pattern will be in place across much of the eastern CONUS with a sizable ridge across the western CONUS.
1059 PM CDT Thu Sep 3 2020 Early afternoon analysis showed a strong low pressure system spinning just north of Lake Superior, with an associated cold front draped across Lake Michigan and into far southeast Wisconsin. Winds should subside this evening as the low continues to push off to the east and an inversion sets up. Model soundings show a little instability in the cloud layer, but pretty dry air in the low levels so anything that does develop would have a difficult time reaching the ground.
224 AM EDT Fri Sep 4 2020 A weak cold front will stall across southern NC this morning, with following less humid and slightly less hot conditions expected this afternoon. A much stronger cold front will cross NC tonight. Markedly cooler and drier high pressure will extend across the middle Atlantic through the weekend. The next and more substantial cold front will move through central VA and the S Appalachians through the afternoon, preceded by a subtle 850 mb trough. As the front drops through overnight, expect a shift of winds to NE and the onset of a wedge event as cool high pressure starts to build in from the N.
1152 PM CDT Thu Sep 3 2020 A cold front will continue to cross central Illinois through the evening hours, bringing the chance for sprinkles over the southeast sections of the area. Cooler and dry conditions are expected Friday.
A cold front currently stretching from KS to OH will slowly move southeast and approach the region Friday afternoon with additional scattered showers and thunderstorms expected. Diegan Chattanooga Airport, TN 89 67 86 64 87 / 20 20 0 0 0 Knoxville McGhee Tyson Airport, TN 87 64 84 61 85 / 20 20 0 0 0 Oak Ridge, TN 87 62 84 60 85 / 20 20 0 0 0 Tri Cities Airport, TN 83 59 81 57 83 / 20 20 0 0 0.
/issued 401 AM CDT Fri Sep 4 2020/ Following several weeks of dewpoints in the 70s (upper 70s on occasion), a brief respite is on way to the Midsouth, courtesy of a later summer cold frontal passage later today. This morning's upper air analysis and GOES water vapor imagery showed a broad longwave trof over the upper Midwest. This feature separated two lobes of of subtropical high pressure - a 596dm 500mb height ridge centered over the Great Basin, and the other, a 594dm 500mb height ridge over northern FL/southern GA. The moist shear axis will be displaced to the south today, in response to upstream height falls into the base of the upper Midwest trof. These storms may be aided by surface moisture convergence along a southward- advancing cold front.
642 AM EDT Fri Sep 4 2020 A Cold front will drop south through the Ohio Valley early this morning with high pressure building into the region today. This high will last through the weekend, keeping the forecast dry with below seasonal temperatures to start.
704 AM EDT Fri Sep 4 2020 Dry and less humid weather is expected through the weekend as high pressure builds behind the passage of a cold front this morning. A band of clouds should continue to track SE across the region this morning with a crossing cold front. A clearing trend is expected after the passage of the front as high pressure builds under a broad upper trough. Dry weather is expected through the period as high pressure moves east across the Upper Ohio Valley region, under a persistent broad upper trough. Model ensembles indicate an upper high should retrograde across much of the Eastern CONUS through mid week, as a deepening trough develops across the Central CONUS. This should maintain generally dry and warmer weather across the Upper Ohio Valley region.
/issued 356 AM CDT Fri Sep 4 2020/ (Today and Tonight) Weak upper low set to retrograde slightly to the southwest over the next 24 hours, increasing the rain chances again across the southeast half of the area. CAMs suggest that at least scattered showers and storms will redevelop today a little farther west than in previous days, although the Hill Country counties will still see the highest POPs. Otherwise, the increase in cloud cover should keep temperatures down a few degrees this afternoon, more in the low to mid 90s.
333 AM MDT Fri Sep 4 2020 Current surface analysis shows nearly stationary frontal boundary just to the west of the area, with high pressure centered to the southeast of the region. Upper level analysis shows fast northwest flow over the region, with a large area of high pressure centered over the Great Basin region. Warmer air will build into the area over the next couple of days as the boundary slides slowly east-northeast as a warm front, with highs in the 80s today and 90s to around 100 on Saturday. A weak and dry cold front will approach the area later on Saturday, with southerly winds to the east of the Black Hills, and potentially breezy west to southwest winds developing over northeast WY into far western SD.