Aikyam-Lab/Synoptic-Bench huggingface dataset:
1215 PM CDT Tue Sep 3 2019 Upper-Level ridge of high pressure to maintain VFR conditions across the region through the terminal forecast period ending 04/18Z. /issued 1010 AM CDT Tue Sep 3 2019/ Upper-level ridge maintaining mostly clear skies across the region this morning. /Today through Wednesday/ High pressure at the surface and aloft will persist through the short term period resulting in mostly clear skies throughout. High temperatures each day will average in the mid to upper 90s, with Wednesday being slightly warmer as the ridge builds in overhead.
147 PM EDT Tue Sep 3 2019 A cold front will cross southeast through the region late tonight and Wednesday morning. High pressure will build behind it and keep a dry and comfortable airmass over the Ohio Valley for the remainder of the week and into the weekend. Convection that develops ahead of a cold front will spread southeast into the forecast area during the mid to late evening. Cooling will lag the front a bit with areas along and south/east of I-71 still rising into the lower to mid 80s.
A ridge of high pressure will provide these conditions. A moisture starved cold front is forecast to move through the area on Wednesday. A much cooler air mass will be ushered into the region behind this boundary, giving us cooler temperatures on Wednesday. Highs on Wednesday will be close to normal and several degrees cooler than todays highs will be. Max temperatures on Wednesday will likely rise into the mid to upper 80s for most locations, with cooler highs in the lower 80s north of the Mountain Parkway.
Afternoon rain chances will range from minimal to zero, as we remain on the eastern edge of the big upper level ridge, likely also enhanced by the subsidence area well away from "Dorian.
357 PM CDT Tue Sep 3 2019 A strengthening upper level ridge will expand into the region from the Rockies and Southern Plains during this week. This ridge will also help bring hot and dry conditions. In the meantime, an upper level ridge shifting out of the eastern Rockies and into the Southern Plains will continue to expand to the southeast, bring drier continental air and establishing itself as the main weather player.
Winds will lighten slightly overnight with the lack of daytime heating but with the pressure gradient tightening between the hurricane and high pressure to the west, they will stay around 5- 10MPH. A very tight moisture gradient from west to east continues tonight but cloud cover should diminish into the overnight hours with some clouds lingering in the east where the highest moisture is. Lows will be in the lower to mid 70s.
226 PM MDT Tue Sep 3 2019 Upper ridge approaching the region will lead to mostly clear and dry weather tonight. With the upper ridge located over the forecast area, temperatures will warm well into the 80s and lower 90s under mostly sunny skies.
It will turn cooler, with highs in the 70s and lows in the upper 40s and 50s. Rain cooled/persistent anvil leading to sharp thermal discontinuity/pseudo-warm front from north central Illinois into west central Indiana. Additional storms firing now near Kankakee near this boundary within prefrontal trough with some concern for isolated severe with effective shear on order of 40 knots. Significantly cooler/drier post frontal air mass settles in for Wednesday as expansive 1022 mb ridge settles over the Great Lakes.
307 PM CDT Tue Sep 3 2019 High pressure remains over the Tennessee Valley, with fair weather clouds across the area. Wednesday should be fairly similar to today as weak high pressure remains over the region.
245 PM CDT Tue Sep 3 2019 A surface cold front advanced south through south central Nebraska this morning and was located in north central Kansas early this afternoon. Cooler, drier air will settle in behind the boundary as we head into tonight and air conditioners can take a break as temps drop into the 50s for overnight lows.
322 PM CDT Tue Sep 3 2019 An elongated upper level ridge centered over SE Colorado will continue to bring tranquil weather conditions through tomorrow. A weak cold front is moving south through SE CO/SW KS and may make it to parts of the northwestern Panhandles before stalling. With not a lot of moisture to work out ahead of front and some drier air in the wake of the weak cold front, any showers should remain north of the front where little surface convergence exist for showers.
The upper level ridge continues to dominate the weather with highs generally in the 90s to near 100 degrees.
207 PM CDT Tue Sep 3 2019 A cold front is currently stationed to the north of the area across Nebraska into Iowa. This front is expected to slowly translate from north to south this evening as a trough exits the Upper Midwest into the the eastern CONUS. Behind the front, cooler temperatures are in store Wednesday for most of the area with highs in the lower 80s.
324 PM CDT Tue Sep 3 2019 /Through Tonight/ A sprawling surface anticyclone is centered over the central U. beneath a stout mid level ridge. The resulting easterly low level flow is dry with the bulk of the low level moisture confined to the two tropical systems in the Gulf and off the east coast of Florida. Dunn /Wednesday and Beyond/ A strong mid and upper ridge will become centered over the Southern Plains on Wednesday and remain anchored there for the rest of the week. The position of the ridge will keep what is left of newly formed Tropical Storm Fernand well south of the region while pushing it westward across Mexico.
Satellite imagery shows an upper-level ridge building over the southern Rockies and Plains, while a trough is driving an MCS over Illinois and Indiana this morning. The TN Valley remains on the eastern edge of the ridge, with high pressure over northern Alabama and southern Tennessee. Expect high pressure to keep skies mostly clear today, and bring temperatures up to near or a couple degrees warmer than what we saw yesterday. The pattern will generally remain unchanged through the first part of the short term period, as the ridge remains anchored over the Plains and into the TN Valley.
515 PM MDT Tue Sep 3 2019 Upper ridge approaching the region will lead to mostly clear and dry weather tonight. With the upper ridge located over the forecast area, temperatures will warm well into the 80s and lower 90s under mostly sunny skies.
809 PM CDT Tue Sep 3 2019 A cold front will move across central and southeast Illinois tonight. High pressure will push into the region in the wake of the front bringing dry and cooler weather for the next few days. Radar imagery showed the cold front pushing across the northwestern CWA, generally from near Macomb to northwest of Pontiac. With 700 temp of 12C, it will likely take approach of a cold front currently from SW WI to SE IA to provide sufficient convergence to initiate significant convection. Temperatures following the frontal passage on Wednesday should be about 10 degrees cooler with much lower humidity. Northwest flow will dominate the Midwest through the end of the week as ridging develops over the Rockies/High Plains.
High pressure aloft centered near the Four Corners region will drift slowly east through the balance of the work week.
Surface ridging and benign very weak flow aloft resulted in fair wx today, with dew points hardly high enough to even support cu. Have limited this to places generally south of I-64, with the earlier arrival of the cold front limiting destabilization potential in our northern counties. The pressure gradient between Dorian and high pressure to our north will aid in pulling cooler and drier air south into our area overnight.
High pressure remains over the Tennessee Valley, with fair weather clouds across the area. Wednesday should be fairly similar to today as weak high pressure remains over the region.
High pressure will maintain dry conditions through this evening, though moisture advection and southerly winds ahead of an approaching front will result in increasing cloud cover. Dry conditions should resume for much of the area by the afternoon, however, latest CAM runs do indicate additional convection firing along the front across the ridges as convective temperature is reached early in the afternoon. Bumped up afternoon PoPs across ridge zones to account for this.
The highest coverage is over eastern Polk and Highlands counties, and with the loss of heating, don't expect too much in the way of rainfall near the Gulf coast tonight.
A cold front is currently stationed to the north of the area across Nebraska into Iowa. This front is expected to slowly translate from north to south this evening as a trough exits the Upper Midwest into the the eastern CONUS. Behind the front, cooler temperatures are in store Wednesday for most of the area with highs in the lower 80s.
313 PM MDT Tue Sep 3 2019 H5 ridge centered on Four Corners continues to flatten out, allowing some midlevel moisture to move back across Wyoming this afternoon, most obvious by the amount of clod cover over most of the state. Cloud cover will be limited to the high cirrus overnight, with minimal to no rain chances.
Quick look at some of the latest forecast data continues to show ridging at the surface and aloft which will be the rule in the short term.
The cold front will push south of the CWA late tonight. Highs on Wednesday will be cooler behind front with cold air advection.
/issued 357 PM CDT Tue Sep 3 2019/ A strengthening upper level ridge will expand into the region from the Rockies and Southern Plains during this week. This ridge will also help bring hot and dry conditions. In the meantime, an upper level ridge shifting out of the eastern Rockies and into the Southern Plains will continue to expand to the southeast, bring drier continental air and establishing itself as the main weather player.
Water vapor is showing some sub-trop moisture working northward around the western periphery of the upper high. With moisture and cloudiness on the increase the large diurnal swings should shorten with slightly warmer lows forecast the next few nights while highs tomorrow drop a few degrees most areas.
North and Central Texas remain beneath a sprawling upper-level ridge of high pressure. /Issued 324 PM CDT Tue Sep 3 2019/ /Through Tonight/ A sprawling surface anticyclone is centered over the central U. beneath a stout mid level ridge. The resulting easterly low level flow is dry with the bulk of the low level moisture confined to the two tropical systems in the Gulf and off the east coast of Florida. /Issued 324 PM CDT Tue Sep 3 2019/ /Wednesday and Beyond/ A strong mid and upper ridge will become centered over the Southern Plains on Wednesday and remain anchored there for the rest of the week. The position of the ridge will keep what is left of newly formed Tropical Storm Fernand well south of the region while pushing it westward across Mexico.
633 PM CDT Tue Sep 3 2019 A surface cold front advanced south through south central Nebraska this morning and was located in north central Kansas early this afternoon. Cooler, drier air will settle in behind the boundary as we head into tonight and air conditioners can take a break as temps drop into the 50s for overnight lows.
954 PM CDT Tue Sep 3 2019 Latest near term model guidance suggests that the southwestern flank of a shearing 500-mb trough ejecting east-northeastward across New England will sag southward into the TN Valley early Wednesday morning. Wednesday should be fairly similar to today as weak high pressure remains over the region.
Updated at 255 PM EDT Tue Sep 3 2019 Main short-term weather player is a cold front currently extending across Wisconsin and Iowa.
624 PM CDT Tue Sep 3 2019 The cold front currently moving through north central and western KS this afternoon will make making its way SSE down to northern Oklahoma by daybreak wednesday. The upper ridge that has brought northwesterly midlevel flow over the area will continue for the next couple of days bringing quiet dry conditions to the area. Slightly cooler, seasonable temps can be expected tomorrow behind the cold front with highs in the mid to upper 80s.
Wind speeds will build by tomorrow morning, with the highest speeds occurring near the shoreline and decreasing further inland.
625 PM MDT Tue Sep 3 2019 Warming up across the CWA the next couple days as an upper high builds a bit over Colorado and the cooler airmass over the plains moves away.
The near term period looks to remain fairly quiet across the area, with high pressure the dominant feature tonight into Wednesday morning. As the high slides east Wednesday afternoon, a fairly tight pressure gradient sets up across the west, then over the entire CWA Wednesday night, resulting in breezy conditions. Low temperatures tonight will be in the 40s to lower 50s, with highs on Wednesday ranging from the lower 70s east to the mid 80s southwest. Dry conditions with northwest flow aloft and high pressure at the sfc will cap off the work week.
958 PM EDT Tue Sep 3 2019 A cold front will cross southeast through the region late tonight and Wednesday morning. High pressure will build behind it and keep a dry and comfortable airmass over the Ohio Valley for the remainder of the week and into the weekend. Cold front is still forecast to push through much of the region tonight. Locations in the far nw counties will see lows down into the lower 60s, while the rest of the region remain in the mid to upper 60s. They will range from the mid 70s in the northwest to around 80 in the I-71 corridor, to the lower 80s in KY and far srn OH.
Kept the lows we had going in the low to mid 40s, which seems reasonable given current temp trends. There have been pockets of weak forcing and mid level moisture advection rotating across the region, that have supported sprinkles (or a few light showers), and this should end as the upper low exits and sun goes down. Wednesday-Wednesday night: A brief period of southerly return flow and mostly sunny skies is expected to bring warmer temps (compared to today).
651 PM EDT Tue Sep 3 2019 A cold front over the Great Lakes will push southeast across Pennsylvania Wednesday. High pressure will then build into the area for the rest of the week. The focus for late tonight will be on an approaching cold front over the Grt Lks. Min temps are expected to be mostly in the low to mid 60s. 18Z models indicate the cold front will push through the northwest counties between 13Z-16Z and clear the southeast counties by 00Z. As noted above, cold front moving faster on Wed. Mainly dry weather expected for Thu and Fri as high pressure builds into the area.
500 PM MDT Tue Sep 3 2019 H5 ridge centered on Four Corners continues to flatten out, allowing some midlevel moisture to move back across Wyoming this afternoon, most obvious by the amount of clod cover over most of the state. Cloud cover will be limited to the high cirrus overnight, with minimal to no rain chances.
In the upper levels of the troposphere, an upper ridge stretches east over the Southern Plains to the Southeast. For tonight, subsidence from the upper ridge will be counter-balanced somewhat by more efficient radiational cooling with the drier airmass to bring low temperatures tonight a bit above seasonal.
1001 PM EDT Tue Sep 3 2019 Forecast is progressing as expected with high pressure and clear conditions across the area. Chattanooga Airport, TN 70 95 69 88 / 0 10 0 0 Knoxville McGhee Tyson Airport, TN 68 92 68 86 / 0 10 10 0 Oak Ridge, TN 68 93 68 86 / 0 10 10 0 Tri Cities Airport, TN 62 90 66 81 / 0 10 10 10.
429 PM CDT Tue Sep 3 2019 A cold front will move across central and southeast Illinois tonight. High pressure will push into the region in the wake of the front bringing dry and cooler weather for the next few days. With 700 temp of 12C, it will likely take approach of a cold front currently from SW WI to SE IA to provide sufficient convergence to initiate significant convection. Temperatures following the frontal passage on Wednesday should be about 10 degrees cooler with much lower humidity. Northwest flow will dominate the Midwest through the end of the week as ridging develops over the Rockies/High Plains.
/Issued 322 PM CDT Tue Sep 3 2019/ An elongated upper level ridge centered over SE Colorado will continue to bring tranquil weather conditions through tomorrow. A weak cold front is moving south through SE CO/SW KS and may make it to parts of the northwestern Panhandles before stalling. With not a lot of moisture to work out ahead of front and some drier air in the wake of the weak cold front, any showers should remain north of the front where little surface convergence exist for showers.
612 PM CDT Tue Sep 3 2019 A cold front will move across central and southeast Illinois tonight. High pressure will push into the region in the wake of the front bringing dry and cooler weather for the next few days. With 700 temp of 12C, it will likely take approach of a cold front currently from SW WI to SE IA to provide sufficient convergence to initiate significant convection. Temperatures following the frontal passage on Wednesday should be about 10 degrees cooler with much lower humidity. Northwest flow will dominate the Midwest through the end of the week as ridging develops over the Rockies/High Plains.
215 PM PDT Tue Sep 3 2019 High pressure over the southwest will bring hot, humid weather this week with scattered afternoon showers and thunderstorms over the mountains and deserts. The weather will turn cooler and less humid this weekend as a trough of low pressure moves inland over the West Coast.
Generally quiet conditions expected with the frontal passage this afternoon and evening due to significant dry air through the majority of the profile and lack of upper support; however, a few isolated, elevated showers/storms could pop up on the elevated 700 hPa cold front tonight where instability is based.
347 PM MDT Tue Sep 3 2019 A cold front pushed south across eastern Colorado this morning. This brought much cooler air. Highs this afternoon should be 15F to 20F cooler than yesterday. The upper level ridge will stay in place through Wednesday. Residual moisture from today's cold front combined with warmer temperatures will result in surface based CAPE of 500-1000 J/kg.
No weather concerns in the short term as high pressure builds across the region resulting in clearing skies and decreasing winds.
1101 PM EDT Tue Sep 3 2019 A cold front over the Great Lakes will push southeast across Pennsylvania Wednesday. High pressure will then build into the area for the rest of the week. The focus for late tonight will be on an approaching cold front over the Grt Lks. Min temps are expected to be mostly in the low to mid 60s. 18Z models indicate the cold front will push through the northwest counties between 13Z-16Z and clear the southeast counties by 00Z. As noted above, cold front moving faster on Wed. Mainly dry weather expected for Thu and Fri as high pressure builds into the area.
1138 PM MDT Tue Sep 3 2019 Warming up across the CWA the next couple days as an upper high builds a bit over Colorado and the cooler airmass over the plains moves away.
1015 PM MDT Tue Sep 3 2019 H5 ridge centered on Four Corners continues to flatten out, allowing some midlevel moisture to move back across Wyoming this afternoon, most obvious by the amount of clod cover over most of the state. Cloud cover will be limited to the high cirrus overnight, with minimal to no rain chances.
326 AM CDT Wed Sep 4 2019 Hot and dry weather will be the rule the remainder of the week and into the weekend as upper ridging holds. Expect highs back into the lower/mid 90s with heat index values around 100F in a few spots.
1200 AM CDT Wed Sep 4 2019 The cold front was located near a Chicago to Quincy to Kansas City line at 02z. The cold front will continue to move southward through the remainder of the CWA tonight. The cold front will push south of the CWA late tonight. Highs on Wednesday will be cooler behind front with cold air advection.
1034 PM MDT Tue Sep 3 2019 Upper ridge approaching the region will lead to mostly clear and dry weather tonight. With the upper ridge located over the forecast area, temperatures will warm well into the 80s and lower 90s under mostly sunny skies.
402 AM EDT Wed Sep 4 2019 A cold front will move across the region this morning.
301 AM CDT Wed Sep 4 2019 Early this morning a cold front has dropped through the forecast area ushering much cooler and drier air. Otherwise high pressure will build into the area today making for pleasant early September conditions with highs in the mid 70s to lower 80s. Thursday, high pressure will shift off to the northeast and warm air advection will help temperatures rise into the lower 80s east to upper 80s west. Thursday night a upper level trough moving through the western Great Lakes will forecast a weak front through the CWA.
300 AM CDT Wed Sep 4 2019 Corrected the High Temperatures for Today.
No weather concerns in the short term as high pressure builds across the region resulting in clearing skies and decreasing winds. Early afternoon satellite imagery together with RAP13 surface analysis showed a low pressure across Lake Superior, with low stratus upstream. Winds will weaken as skies clear and high pressure builds in overnight, and could see some patchy fog development in the low lying areas.
222 AM CDT Wed Sep 4 2019 As of 1 am CDT, a very diffuse pre-frontal trough was bisecting the WFO PAH forecast area from west to east, with the primary surface frontal boundary (depicted by wind shift, dewpoint/temperature drop, linear cumuliform cloud bases via satellite) remaining just north of the forecast area. The mixing and scouring out of low level moisture will be slow, with dewpoints not dropping completely into the lower and middle 60s until late Wednesday night.
A 594 dm upper level high will build into Texas and high temps Wed/Thu/Fri look to be very hot.
Clouds should dissipate with sunset Wednesday evening, as high pressure remains overhead. Breezy west to northwest winds will become more northerly overnight, and eventually begin to diminish toward morning as high pressure builds into the area. The low clouds and mist ahead of the approaching cold front is doing yoeman's work in suppressing convection so far. Where the low clouds end on the west end, is then followed by some high clouds associated with a mid level short wave. In the wake of the front this evening, skies will clear, winds will shift to the west and cooler/drier air advects in. A secondary cold front will likely sweep down the lake by mid morning. much cooler than the past few days.
Tonight and Wednesday Strong thunderstorms between the Fox Valley and Lake Michigan this afternoon were pushing east as a cold front and mid level short wave trough made their way across eastern Wisconsin. Cold cyclonic flow around a low pressure system will keep clouds in much of the area tonight and also bring some showers to parts of north-central Wisconsin into this evening. High pressure over the Plains will move east to Wisconsin on Wednesday, bringing sunshine but much cooler temperatures to the area.
A moisture starved cold front may spark isolated showers and storms this afternoon into early this evening as it moves through the region. Once this boundary moves through, a much cooler air mass will filter into the area. We will see the first hints of the cooler air tonight, as low temperatures are forecast to bottom out in the upper 50s to lower 60s, which would be slightly below normal on average across the forecast area. Highs on Thursday will be slightly below normal on average as well, with max values ranging from the upper 70s north of the Mountain Parkway and in the lower 80s south of the there.
315 AM CDT Wed Sep 4 2019 The upper high is currently situated overhead and will continue supplying warm and dry conditions into the weekend.
While the front won't bring a long lasting change in conditions, it should cause Thursday's high temperatures to be slightly cooler.
Meanwhile the weak surface cold front is slowly moving south into the Oklahoma Panhandle and will stall right across the northwest Texas Panhandle by 12z this morning. The dry and hot pattern will persist through tomorrow as the upper-level ridge continues to dominate the forecast area.