Aikyam-Lab/Synoptic-Bench huggingface dataset:
The upper level ridge continues to build over the region and is currently centered over KS/MO. In fact, this high pressure is helping limit temperatures and dew points across the entire area. Our western counties can expect the low to mid 90s this afternoon with heat indices in the upper 90s up to around 103 degrees.
However, temperatures this morning are off to a bit of a cooler start in the wake of the cold front that pushed through the area last evening with most areas currently reading in the low to mid 60s. Cloud cover will pick up just a bit on Sunday as a slug of mid-level moisture is expected to move along the eastern edge of the ridge from an area of showers that is expected to develop across the northern Great Lakes overnight and during the day on Sunday.
In addition to the heat, the region will remain on the southern periphery of an upper ridge today. We will also see a cool front backdoor into the region from the Lower Mississippi Valley this afternoon into the late evening hours, providing lift for additional convection. /20/ (Saturday through Sunday) The next 36 hours will remain warmer than normal, even with daytime chances of scattered showers and thunderstorms. The loss of daytime heating will gradually eliminate remaining convection, however, temperatures will only fall toward a minimum in the mid-70s overnight with dew points in the lower 70s. High temperatures on Sunday will range from the lower 90s across southern Arkansas, northeast Louisiana, and southeast Oklahoma to the upper 90s across deep east Texas.
210 PM EDT Sat Jun 18 2022 High pressure brings dry, cool weather through Sunday night.
243 PM MDT Sat Jun 18 2022 Another warm and moist day across the area! Temperatures are breaching the 90s for the second day in a row, and dewpoints east of Billings are climbing back into the 60s, though somehow nothing compared to the low 70 dewpoints observed yesterday evening. The deep trough currently stretching into central CA will begin to swing through us tomorrow, bringing with it cooler temperatures and better changes for both more storm coverage and intensity on Sunday.
Highs on Sunday will be the coolest of the next seven days with highs in the upper 80s to lower 90s, and will feel pleasant due to the low humidity. Overall, an upper ridge will remain over the Mid-South over the next seven days.
425 PM EDT Sat Jun 18 2022 A large area of high pressure is centered over the Great Lakes. Much cooler than normal temperatures with very comfortable daytime humidity will continue through the weekend under a gusty northwest wind.
309 PM CDT Sat Jun 18 2022 An amplified upper trough will remain in place across the western U. A low level jet near 50kts will keep southerly winds 15 to 30 mph overnight, and will also keep lows in the lower to mid 70s. The highest POPs however will be across the eastern panhandle and northwest Sandhills.
212 PM EDT Sat Jun 18 2022 High pressure brings dry, cool weather through Sunday night.
WV imagery indicates amplified ridging aloft shifting slowly east across the Central Plains. Meanwhile, an upper level trough of low pressure is pushing ashore into northern/central California. Near the surface, a lee side trough of low pressure is anchored in eastern Colorado. Strong subtropical midlevel anticyclone near 593 dm was centered over eastern Kansas at midnight. The upper high will be parked near Kansas City through Saturday, delivering yet another sunny, hot, windy day.
837 AM PDT Sat Jun 18 2022 A deep trough along the West Coast will continue cooler than average weather and strong, gusty winds near the desert passes today. As the trough moves farther inland, west winds will weaken, and it will be warmer.
To start the period, a tight pressure gradient is in place with the area sandwiched between high pressure over Ontario and low pressure centered over eastern Montana.
1116 AM MDT Sat Jun 18 2022 The midlevel blocking pattern will begin to break down during the next 36 hours, as the PacNW trough finally shifts east. The first change will be a decrease in temperatures on Saturday, with the core of the heat ridge pushing east, and more cloud cover overspreading the region.
Skies will remain mostly clear over the entire region with upper level descent and building high pressure. High pressure will continue building for the daytime on Sunday.
331 PM EDT Sat Jun 18 2022 A large area of high pressure is centered over the Great Lakes. Much cooler than normal temperatures with very comfortable daytime humidity will continue through the weekend under a gusty northwest wind.
1107 AM EDT Sat Jun 18 2022 A large area of high pressure was centered over the north shore of Lake Superior this morning. Much cooler than normal temperatures with very comfortable daytime humidity will continue through the weekend under a gusty northwest wind.
Isolated thunderstorms developing this afternoon mainly over the higher terrain.
Wagner (Issued 252 AM CDT Sat Jun 18 2022) Today through Sunday: High pressure will build into the area from the north in the wake of a backdoor cold front that passed through the area yesterday evening. Highs near the lake are expected to be in the low to mid 60s, with mid 70s expected inland. The high very slowly pushes east on Sunday, with winds turning southerly and temperatures warming into the low 80s inland, with mid to upper 70s near the lake.
348 PM CDT Sat Jun 18 2022 A ridge is in place from central Canada to the Gulf of Mexico. There is a trough over the Northeast and another one over the West Coast. With the ridge in place, above normal temperatures persist across Kansas by around five to ten degrees with values in the mid to upper 90s.
1055 AM MDT Sat Jun 18 2022 Aviation Section Updated Temperatures will not be quite as hot across much of North- Central and Southwestern Montana today as cooler air begins to push into the area. As this cooler air works in, a few showers and thunderstorms are expected to develop this afternoon, a few of which may produce some gusty winds and hail.
An elongated upper trough extends from Western BC through the West Coast of the US, while near the surface weak high pressure influence is noted offshore with troughing east of the Cascades. Provided the upper trough, scattered showers will remain present over Western Washington through the day today and into the overnight period. A trough will be over the area today for cooler weather and showers.
Northerly flow weakens as high pressure settles over the region tonight which sets the stage for ideal radiational cooling on top of the already chilly air mass. These clouds are a tracer for slight upper level ridge progression toward Lower MI along with the leading mid level moisture axis. The 700mb theta-e ridge is tied to a broadly sloped warm front located at the surface all the way back into the northern Plains and upper Midwest. Based on upstream observations from last night and this morning, convection in this frontal zone will be nocturnally forced by the low level jet leaving daytime remnants to attempt overcoming a still formidable layer of dry air below 700mb over SE MI during the afternoon into Sunday evening.
623 PM CDT Sat Jun 18 2022 (Thru Tonight) Low level moisture pooling in the lower Ark River valley ahead of a back-door front has yielded heat indices consistently 105F or better.
1031 PM EDT Sat Jun 18 2022 A large area of high pressure is centered over the Great Lakes. Much cooler than normal temperatures with very comfortable daytime humidity will continue throughout the weekend under a gusty northwest wind.
Confidence is increasing for a few severe thunderstorms Sunday EVENING UPDATE: The cold front moving through the area today arrived a few hours earlier than expected, leading to cooler high temperatures and an earlier shift to light/variable winds across much of the area. The upper ridge axis will shift east as a deep western CONUS trough shifts diffluent southwest upper flow across NE Montana.
549 PM EDT Sat Jun 18 2022 A large area of high pressure is centered over the Great Lakes. Much cooler than normal temperatures with very comfortable daytime humidity will continue through the weekend under a gusty northwest wind.
504 PM MDT Sat Jun 18 2022 At the start of the short term period, the latest RAP analysis shows the CWA underneath a central CONUS ridge with a trough over the western CONUS. Forecast models show that while the trough moves a little to the east, the CWA remains underneath the ridge for all of Saturday with a southerly flow aloft. On Sunday, forecast guidance shows the CWA's flow aloft taking a slightly more southwesterly direction by the evening with the western upper air trough moving closer to the CWA. Daytime high temperatures look to be in the lower 90s to lower 100s with overnight lows in the lower 60s to lower 70s range.
(This evening through Sunday Night) Another hot and humid day, with Heat Advisories across the entire Four State region through this afternoon, as the area remains on the southern periphery of a large upper ridge. Additional convection is expected to move in from the east as a cool front backdoors into the area from the Lower Mississippi Valley. Behind the front, expect slightly cooler conditions, with highs in the low to mid 90s. The frontal boundary should clear the region by Sunday evening, with drier, slightly cooler, and less humid conditions expanding across the region behind it.
942 PM EDT Sat Jun 18 2022 A Canadian high pressure system will settle south into the Ohio Valley this weekend, offering dry and seasonably mild conditions. Warmer and more humid air will slowly build into the region by the beginning of the upcoming workweek, with hot and humid conditions expected once again by midweek. Mid level flow characterized by a strong ridge over the Nation's mid section and a mean trof over New England and the east coast. In a much drier airmass, temperatures will drop into the upper 40s to the lower 50s, although a few mid 40 readings are not out of the question in the normally cold locales.
Building surface ridging has kept northerly winds breezy today but weaker for Sunday. Chattanooga Airport, TN 62 87 62 93 67 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 58 84 59 89 64 / 0 0 0 0 0 Oak Ridge, TN 56 84 59 90 64 / 0 0 0 0 0 Tri Cities Airport, TN 48 80 53 85 59 / 0 0 0 0 0.
735 PM EDT Sat Jun 18 2022 A Canadian high pressure system will settle south into the Ohio Valley this weekend, offering dry and seasonably mild conditions. Warmer and more humid air will slowly build into the region by the beginning of the upcoming workweek, with hot and humid conditions expected once again by midweek. Mid level flow characterized by a strong ridge over the nations mid section and a mean trof over New England and the east coast. In much drier airmass temperatures to drop to lows from the upper 40s far northeast to the lower 50s southwest.
Thereafter, models were in good agreement with shifting the low pressure trough to our west today a little farther east on Sunday which will focus the best chance of showers and thunderstorms just east and southeast of the greater Tucson area.
The upper ridge currently to our northeast will send another weak disturbance towards the region on Sunday.
314 PM MDT Sat Jun 18 2022 Convection ahead of the next trough has been slower to get going early this afternoon as compared to yesterday. Will be cooler, but still seasonally warm tomorrow, especially across eastern zones. Our other concern today and tomorrow will be the higher rates of snowmelt.
616 PM CDT Sat Jun 18 2022 A ridge is in place from central Canada to the Gulf of Mexico. There is a trough over the Northeast and another one over the West Coast. With the ridge in place, above normal temperatures persist across Kansas by around five to ten degrees with values in the mid to upper 90s.
(Rest of tonight) Tranquil weather across the Tennessee Valley this evening, with high pressure in control of the weather and light northerly winds helping to reinforce a drier air mass. The end result will be a very comfortable night and start to the day on Sunday, with low temperatures in the upper 50s to lower 60s and dewpoints in the lower 50s.
644 PM CDT Sat Jun 18 2022 High pressure will continue to result in prevailing VFR conditions with winds generally less than 10 knots during the day and calm or light/variable at night. /issued 345 PM CDT Sat Jun 18 2022/ It's HOT! Upper ridge centered near Springfield, Missouri with troughs along both coasts.
650 PM CDT Sat Jun 18 2022 (This evening through Sunday Night) Another hot and humid day, with Heat Advisories across the entire Four State region through this afternoon, as the area remains on the southern periphery of a large upper ridge. Additional convection is expected to move in from the east as a cool front backdoors into the area from the Lower Mississippi Valley. Behind the front, expect slightly cooler conditions, with highs in the low to mid 90s. The frontal boundary should clear the region by Sunday evening, with drier, slightly cooler, and less humid conditions expanding across the region behind it.
Reimer Another warm and moist day across the area! Temperatures are breaching the 90s for the second day in a row, and dewpoints east of Billings are climbing back into the 60s, though somehow nothing compared to the low 70 dewpoints observed yesterday evening. The deep trough currently stretching into central CA will begin to swing through us tomorrow, bringing with it cooler temperatures and better changes for both more storm coverage and intensity on Sunday.
Scattered showers and isolated thunderstorms are expected late tonight through Sunday, with cooler temperatures in the 60's and breezy winds.
614 PM CDT Sat Jun 18 2022 Latest water vapor imagery is showing a large upper high centered over the central CONUS. This in turn was keeping a wide range in temperatures and dewpoints across the CWA despite full insolation, with near normal temperatures and dewpoints in the 60s over central Missouri near the front and below normal temperatures and dewpoints in the low 50s over south central IL in the ridge axis. Latest HREF is showing the center of the upper high moving east across Missouri and Illinois through Sunday night. With this low level flow, dewpoints should drop into the 50s across the area tonight through Sunday night. Highs on Sunday will climb back into the mid 80s with winds out of the southeast and 850mb temperatures a couple of degrees warmer than today.
617 PM CDT Sat Jun 18 2022 (Tonight) A cold front is slowly dropping south across TN this afternoon.
601 PM CDT Sat Jun 18 2022 (This evening through Sunday) An upper level disturbance/perturbation will rotate around the upper high across portions of the region this weekend. Despite the small glimmer of hope that some locations may get rain, the hot temperatures will continue into Sunday although some cloud cover over the area should keep temperatures a few degrees cooler than the last few days.
623 AM CDT Sun Aug 25 2019 Some low CIGs/fog will continue for a bit this morning as a warm front lifts north. This trough is also responsible for some organized convection ongoing early this morning over KS. A cold front will be dropping SE across the Plains towards the state late Mon afternoon.
Continued the lower POPs to the west as the subsidence aloft near the Rio Grande Valley should inhibit any thunderstorm development. Temperatures appear a bit warmer today with highs in the mid 90s to near 100 degrees across the area. Monday also looks like it may meet the criteria as well, with lower POPs and slightly warmer temperatures expected.
329 AM MDT Sun Aug 25 2019 A strong trough will move along the U. After the trough passes fully east of the area, the gradient flow will relax and winds will decrease Monday High pressure will continue building north and west over the Great Basin to the Pacific Northwest through the week, while strong low pressure will control the weather over the eastern half of the country.
A cold front across eastern Montana will move east and be the focus for thunderstorm initiation across western North Dakota late this morning. Highs today will be in the 70s to around 80, and lows tonight should be in the low to mid 50s.
/issued 311 AM EDT Sun Aug 25 2019/ The weak area of low pressure that has been over south Florida for the last few days will begin to move further north today into the western Atlantic.
Another round of storms is expected this afternoon/evening, but coverage should be isolated with KCHA having the highest chances of seeing a thunderstorm.
/issued 348 AM CDT Sun Aug 25 2019/ (Today and Tonight) An upper level high pressure ridge will begin building across the Southern Plains today.
205 PM CDT Sun Aug 25 2019 The focus in the short term is overnight passing of a cold front and potential for thunderstorms. Late tonight, a cold front will approach from the northwest. Though its a cold front, temperatures for many areas will be warmer than today simply because we will have some well-deserved sunshine in the afternoon. Monday night will bring cooler temperatures with lows in the 50s and Northwest winds dropping off as high pressure moves toward the forecast area.
However, storms have struggled to sustain themselves in this low shear environment. A cold front, currently stretched across central North Dakota, will continue to move east and be the focus for thunderstorm initiation across central North Dakota late this afternoon.
Upper trough over the Plains will begin to move northeastward towards the southern Great Lakes, keeping the broad southerly flow in the low levels and rain chances into Monday morning.
A low pressure system passing over the terminals through tomorrow morning will keep lower ceilings and light to moderate rain with some embedded thunderstorms in the forecast at all of the terminals through most of the forecast period.
Temperatures at mid afternoon are in the mid 70s to lower 80s with light north to northeast winds across the northern half of the area and southerly winds across the south increasing the low level moisture and keeping Chattanooga in the mid 70s. The low level south to southeast upslope flow will keep a few showers around southeast Tennessee and southwest North Carolina through early evening. Have slowed the increasing rain chances some thinking the models are bringing the rain in a little to soon with drier airmass still filtering in from the high pressure to the east.
This round of showers and storms will move through to the east with another round expected to develop across the southern half of the area overnight in response to approaching negatively tilted short wave pushing through as the upper level trough continues to deepen to the north.
A cold front, currently stretched across central North Dakota, will continue to move east and be the focus for thunderstorm initiation across central North Dakota late this afternoon.
/Tonight through Monday Night/ The upper level trough will continue to eject out of the Four State Region this evening and will take the ongoing convective activity with it. By tomorrow, the upper level ridge will push back into the area from west, and along with it, drier air aloft.
Upper level ridging will continue to build into the region through Monday, resulting in an 850mb thermal ridge expanding into the area Monday afternoon.
154 PM PDT Sun Aug 25 2019 Ridge of high pressure remains over Central California today, meaning another day of above normal heat.
25/18Z TAF CYCLE Expect scattered to numerous SHRA/TSRA acrs the FA this aftn in advance of and upper lvl trof. This trough is also responsible for some organized convection ongoing early this morning over KS. A cold front will be dropping SE across the Plains towards the state late Mon afternoon.
Mid level trof/low will be in the progress of forming over south central Canada early in the period, and then should migrate toward the eastern Great Lakes by the mid to latter part of the week as energy continues to rotate through the southern part of the trof.
Higher pressure over the northeast states had nosed southward east of the Appalachians bringing in a cooler airmass with an east to northeast surface flow overnight and this morning across the northern two thirds of the forecast area. An upper trough had moved into the central states today. Temperatures this morning were much cooler than the last several days only in the mid 60s to the lower 70s. Farther northeast a few showers central areas due to inverted trough brought slight rain chances farther northeast for this area. Chattanooga Airport, TN 80 69 76 69 / 40 50 80 40 Knoxville McGhee Tyson Airport, TN 82 68 78 68 / 30 30 70 30 Oak Ridge, TN 82 68 77 67 / 30 40 70 30 Tri Cities Airport, TN 81 62 78 64 / 10 10 30 30.
Upper trough axis currently swinging through ERN KS/OK this morning.
315 PM CDT Sun Aug 25 2019 Upper level trough was moving through the area this afternoon, with the vort located near Kansas City. An area of showers and thunderstorms had just moved through the Highway 65 corridor region with some clearing taking place across southeast Kansas and western Missouri. The low-level cloudiness and reduced visibility have been due, in large part, to a band of showers entering the region from eastern Kansas. This seems like a good possibility as much warmer air begins to advect across southwest Missouri tonight ahead of an approaching cold front.
Meanwhile, broad upstream trough was situated over western Canada.
Cumulus are expected to build during the afternoon yielding widely scattered showers over the high terrain around Bonners Ferry.
1136 AM MDT Sun Aug 25 2019 A strong trough will move along the U. After the trough passes fully east of the area, the gradient flow will relax and winds will decrease Monday High pressure will continue building north and west over the Great Basin to the Pacific Northwest through the week, while strong low pressure will control the weather over the eastern half of the country.
Attention will turn to very hot temperatures Monday afternoon and a risk of severe thunderstorms Monday evening and night Veered flow ahead of a cold front Monday will result in very hot ambient temperatures across at least southwest Oklahoma and western north Texas. Evapotranspiration from recent rainfall and somewhat cooler 85h temperatures will result in not as hot temperatures elsewhere. However, afternoon dewpoint temperatures across at least the eastern half of Oklahoma are expected to range from the lower to mid 70s, with some upper 70s possible. Monday afternoon, a cold front will enter northwestern Oklahoma and is expected to be located near a Clinton/Stillwater line by 6 pm.
Cooler air has filtered in behind a dry cold front which passed through the area last night and afternoon high temperatures will be about 10 degrees cooler than yesterday. Temperatures will be 5 to 10 degrees cooler (near normal) today as a result of dry cold front which moved through last evening. The pattern shifts Monday night as an upper ridge moves across the Intermountain West.
A few showers are showing up on radar this morning, and CAMs continue to show additional development by the early afternoon thanks to the upper trough getting closer to the mid state. For now, have most of the area around 80 with a few spots in the low 80s.
240 PM MDT Sun Aug 25 2019 Current surface analysis shows low pressure over western ND, with cold front extending south into northwest SD and the Black Hills area. Much cooler and brisk conditions can be expected for the first half of the week as strong northwest flow aloft develops behind strengthening system to the northeast of the region.
1230 PM CDT Sun Aug 25 2019 Upper level trough moving through coupled with low level moisture off the Gulf of Mexico and diurnal heating will produce showers and thunderstorms this afternoon into the evening. The upper trough will continue to shift east later today and, with the loss of daytime heating, the convective activity will diminish rather quickly this evening.
Scattered/elevated convection over ptns srn/cntl MO will increase/advect into and over the PAH FA with time, as height falls spill down the Mississippi river valley out ahead of a mean long wave trof of energy racing from the High Plains to the Great Lakes states.