Aikyam-Lab/Synoptic-Bench huggingface dataset:
By Saturday night, the upper-level low pressure trough departs toward the northeast, as NW aloft returns to our region.
Elevated fire weather concerns remain in place today despite highs 5-15 degrees cooler than yesterday, except in far central OR that will see similar temperatures.
1238 PM CDT Fri Jul 24 2020 Upper level high pressure will remain centered over Kansas and Oklahoma into tonight. This will keep temperatures seasonably hot with most areas again warming into the lower to middle 90s. Not seeing any threat for elevated storms overnight as the low- level jet will be focused well to our west and northwest. Lows tonight will be similar to the last several nights with readings ranging from around 70 degrees across the eastern Ozarks to the lower and middle 70s near the KS/MO border. That upper level high will hang on across the Plains into the upcoming weekend.
317 PM CDT Fri Jul 24 2020 A continuation of the heat and humidity with isolated afternoon thunderstorms are the highlights of the short term forecast. Afternoon temperatures have warmed to the lower 90s in most locations with dewpoints in the upper 60s and 70s with heat index values near 100. More of the same is expected for Saturday with an upper ridge centered over the Plains.
Lows tonight will be in the mid 70s with highs Saturday in the lower 90s.
906 AM PDT Fri Jul 24 2020 Storm chances continue today over Mohave County and the higher elevations of the Sierra Nevada with dry conditions expected elsewhere.
/Issued 1012 AM CDT Fri Jul 24 2020/ Upper ridge expanding across the plains will increase temps some and limit convection over the next few days. Chances for isolated storms will be mostly confined to the higher terrain of southeast OK and northwest AR this afternoon.
1215 PM PDT Fri Jul 24 2020 A mostly dry cold front passage will bring cooler temperatures to the Inland Northwest through Saturday.
Expecting quiet weather overnight as upper ridging continues to be positioned over the forecast area.
403 PM EDT Fri Jul 24 2020 Building high pressure will bring dry and warmer weather for the weekend. Dry weather will continue through the weekend as the upper ridge builds across the eastern US.
Expect highs in the low 90s with overnight lows in the low to middle 70s.
1221 PM CDT Fri Jul 24 2020 321 AM CDT Aside from some patchy fog forming in some locations this morning and anticipated again early Saturday, broad ridging at the surface and upper levels should provide quiet and dry conditions over the next two days. Today will be the milder of the two, especially along the lake where highs may only reach into the low 80s due to easterly or northeasterly flow off the water. Saturday begins a return toward warmer and more humid conditions as winds shift to more of a southerly component.
1012 AM CDT Fri Jul 24 2020 Upper ridge expanding across the plains will increase temps some and limit convection over the next few days. Chances for isolated storms will be mostly confined to the higher terrain of southeast OK and northwest AR this afternoon.
The best coverage at this point has been across the northeastern counties northward into the eastern half of the Panhandle in proximity to some mid level moisture on the southwestern flank of an upper level high centered over eastern Kansas. Meanwhile, the main axis of monsoonal moisture remains from northern Mexico northward through the 4-corners, then arching around the upper ridge northeastward to the central Plains. Models are suggesting further drying in the mid to upper levels on Saturday as easterly mid level flow increases across the northern half of Texas between the upper ridge to the north and TS Hanna to the south. Surface to low level flow should also back toward the east on Saturday, too, which should result in high temperatures a degree or two cooler than today area wide.
254 PM EDT Fri Jul 24 2020 An upper ridge, that has been centered over the Plains, is finally beginning to move east. Winds will remain light and highs are expected to be a degree or two warmer than today.
A strong subsidence inversion under the upper ridge will keep the area capped away from the higher surface moisture, but the combination of a weaker inversion behind the upper ridge and higher surface dew points may allow diurnal cumulus to grow deep enough to produce isolated sprinkles west of I-39 mid to late afternoon.
/issued 909 AM EDT Fri Jul 24 2020/ Sub tropical ridge extends into the southeast US today with an upper level trough/low over the Bahamas. Highs climb into the lower to mid 90s with the heat indices 102-106. High pressure ridge axis north of the state maintains prevailing east or southeast winds at 15 knots or less for the next few days.
Rua Tropical Storm Hanna is strengthening this afternoon and is expected to continue a gradual strengthening trend until the center makes landfall, which is expected early Saturday afternoon along the lower Texas coast near Corpus Christi. This should continue with the next high tide time this evening, then again for southeast Texas and southwest Louisiana for the high tide time on Saturday morning.
818 PM EDT Fri Jul 24 2020 High pressure will settle over Ohio tonight as an upper level ridge also builds on Saturday, influencing the region with dry weather through the weekend.
1033 PM EDT Fri Jul 24 2020 Currently - An Atlantic pressure ridge extends westward just into the southeastern United State. Meanwhile, a TUTT cell is centered over the northern Bahamas, possibly helping to amplify a subtle lower level trough moving through the central Bahamas. Short Term Update - The subtle lower level trough is expected to continue moving westward towards the Keys through the overnight period while the TUTT cell meanders near the northern Bahamas. Expect winds to recover to a gentle to moderate east to southeast breeze trough the overnight period. An Atlantic ridge reaching towards the southeastern United States coast will be responsible for generally gentle to moderate east to southeast breezes across Keys waters.
High pressure to our east will bring east winds in the 10-12kt range back again tomorrow, with another similar shower and thunderstorm setup expected tomorrow afternoon.
A cold front is in place from southern SK to northwest MT and northern ID. Upper level analysis shows low pressure over western AB, with trough stretching south across the Pacific NW and northern Great Basin. Though stronger shear will be focused to the west of the trough, it will be sufficient for isolated discrete storms early on. Cannot totally rule out an isolated tornado as well with storms that develop along the trough. Cold front to the northwest will move into northern and western areas by early Saturday afternoon, and across the rest of the area late Saturday and Saturday night.
/issued 246 PM EDT Fri Jul 24 2020/ The sub tropical ridge continues into the southeast US through Sat as an upper level trough/low over the Bahamas this afternoon dampens out as it slips over the state. Sun through next Fri: During Sun-Mon the subtropical ridge begins nudging south as another weak trough over the Bahamas ejects west to FL. On Tue the subtropical ridge continues south and reaches central FL by Wed and meanders there for the rest of the week. High pressure ridge axis stays north of the waters through the weekend then settles into central FL by midweek.
This is in response to a fairly large upper trough moving ewd across srn Canada and shifting the upper ridge axis from the Upper MS River Valley to the Lower Great Lakes by 12Z Sun. High temperatures will be around 90 on Saturday with dewpoints in the lower 70s.
934 PM EDT Fri Jul 24 2020 Building high pressure will bring dry and warmer weather for the weekend. Dry weather will continue through the weekend as a high pressure ridge builds across the eastern US.
Aloft, broad area of ridging and center of high pressure stretching from the Rockies to the Ohio Valley will retreat to the southwest CONUS over the first 24 hours or so of the period in response to energy dig southward out of Canada. Short wave trough action, possibly a cutoff low aloft will tend to keep our weather unsettled through the remainder of the forecast.
521 PM MDT Fri Jul 24 2020 Leeside trough has pushed out into the Nebraska Panhandle this afternoon with downsloping northwest winds over southeast WYoming. Panhandle temperatures have climbed into the low 90s. Cold front approaches from the north Saturday morning with surface front near Cheyenne towards 12Z.
Tonight: Storms moving out of the High Plains and Sandhills are expected to congeal into an MCS that will track east through the Dakotas overnight. Saturday and Saturday Night: Given the corn enhanced dewpoints in the mid to upper 70s, and forecast high temperatures in the low to mid 90s for Saturday, heat indices of 103 to 108 are likely Saturday afternoon. A few thunderstorms may affect northeast Nebraska again Saturday night as a cold front sags south into the area.
/Issued 209 PM CDT Fri Jul 24 2020/ Aside from some isolated storm potential mainly in the terrain, the forecast thru tonight will be quiet, with the H5 ridge overhead. The center of the H5 ridge shifts north a bit up into KS as well, thus there was were hints in the data of isolated to widely scattered storm potential during the day from SE OK up into NW AR.
803 PM EDT Fri Jul 24 2020 A weak trough moving into the area overnight will focus scattered to numerous showers and thunderstorms through the evening.
1023 PM EDT Fri Jul 24 2020 High pressure will settle over Ohio tonight as an upper level ridge also builds on Saturday, influencing the region with dry weather through the weekend.
653 PM MDT Fri Jul 24 2020 Overview: SW-SSW flow aloft will prevail over the High Plains -- on the northwest periphery of an upper level ridge centered over the Central/Southern Plains. With synoptic subsidence to the east (beneath the ridge) and SW-SSW flow aloft over the Rockies -- convection will largely be tied to diurnal heating/topography, suggesting that development will most likely occur in climatologically favored areas (i. We are finally looking at some relief from the heat and dry weather with several days of cooler temperatures and rain. An upper level area of high pressure is expected to remain over the TX/OK panhandles extending into Iowa with the ridge extending into the Great Lakes region. An upper level area of low pressure will continue to move east across the Saskatchewan and Manitoba provinces with the trough extending towards the SD/NE line.
An upper ridge, that has been centered over the Plains, is finally beginning to move east. Winds will remain light and highs are expected to be a degree or two warmer than today.
947 PM EDT Fri Jul 24 2020 High pressure will build across the region through Saturday.
High pressure will slowly move across the Lower Great Lakes through Sat. A cold front will then slowly approach Lake MI from the west on Sun, but not pass until late Sun nt-Mon AM. This is in response to a fairly large upper trough moving ewd across srn Canada and shifting the upper ridge axis from the Upper MS River Valley to the Lower Great Lakes by 12Z Sun. High temperatures will be around 90 on Saturday with dewpoints in the lower 70s.
Flow is expected to become more zonal overnight, with northwest flow developing Saturday evening as a ridge builds over the area.
655 PM EDT Fri Jul 24 2020 High pressure will become centered over Se Mi tonight. Meanwhile, the warm plume to the west will fold southeast into the Lower Peninsula supporting an incremental climb in the temps - with the highest values over the Saginaw Valley, approaching 90*F.
609 PM CDT Fri Jul 24 2020 A continuation of the heat and humidity with isolated afternoon thunderstorms are the highlights of the short term forecast. Afternoon temperatures have warmed to the lower 90s in most locations with dewpoints in the upper 60s and 70s with heat index values near 100. More of the same is expected for Saturday with an upper ridge centered over the Plains.
645 PM CDT Fri Jul 24 2020 High pressure will provide mostly clear skies tonight and plenty of sunshine tomorrow.
334 AM CDT Sat Jul 25 2020 332 AM CDT Continued quiet but increasingly warm and humid conditions will be in place today and most of Sunday before shower and thunderstorm chances increase later on Sunday ahead of an approaching cold front. As broad ridging over the Great Lakes pushes east, locally we move into the warm and moist return flow on its western flank today and more so on Sunday.
Sunday will be sunny with slightly warmer temperatures.
With a lack of a ridge aloft and PWATs remaining in the 2 to 2.
The weak cold front, currently located just north of Lewistown, will pass through the area this morning and bring about a few hours of winds gusting up to 25 mph late this morning and into the early afternoon. Northwest winds behind the front will help to keep conditions dry, though not as dry as previous days, with RH's only dropping into the low 20s. Although winds slowly shift to be easterly overnight, consistent high pressure over the western Dakotas will prevent much, if any low-level moisture to move into SE Montana overnight and for much of Sunday, allowing the weekend to finish out with another dry day.
311 AM EDT Sat Jul 25 2020 Synoptically, upper level ridging will maintain its position over the central and eastern US with bookend troughing over the coasts as Tropical Storm Hanna makes landfall over the southern TX shoreline. Latest surface analysis shows 1022dm high pressure centered over the Great Lakes and the southern Appalachians as a quasi-stationary boundary bisects central KY. With the area being on the backside of the high, we should start to see moisture increase once again. Highs will top out in the upper 80s to the low 90s. As we start the new work week, the upper level ridge will break down as a strong upper level trough axis works through the Great Lakes.
As the wave that produced the convection early this morning shifts northeast weak mid and upper level ridging will settle in and could suppress chances during the afternoon and evening. If something can develop late this afternoon or early this evening 2000 J/kg CAPE will be available with very little shear and a freezing level around 14000 feet AGL so the main threats wold be heavy rainfall, hail to the size of quarters and 60 mph wind gusts.
In wake of the perturbation, high pressure accompanied by much drier air will filter into our region beginning late Sunday.
An upper level ridge remains firmly in place across the region and no notable boundary or lifting mechanism in lower layers of the atmosphere is present. The other concern remains the high heat today. The forecast does not change much for tomorrow with the ridge remaining our dominate feature. Expect highs in the low to mid 90s with heat index readings in the low 100's for the start of our weekend. On Sunday, a storm system moving across Canada will allow a cold front to sag southward through the Midwest. That said, however, temps could be just a few degrees warmer south of the boundary due to the effects of some slight pre- frontal compression.
Nebraska is located on the western side of an upper level ridge centered across Missouri.
1241 AM EDT Sat Jul 25 2020 Building high pressure will maintain dry and warmer weather for the weekend. Dry weather will continue through the weekend as a high pressure ridge builds across the eastern US.
as high pressure centered over the Mid Atlantic states will be in firm control. courtesy of our next cold front that will be approaching from the Upper Great Lakes.
954 PM PDT Fri Jul 24 2020 A mostly dry cold front passage will bring cooler temperatures to the Inland Northwest through Saturday.
234 AM EDT Sat Jul 25 2020 High pressure will be in place across the area through the period.
A slight downtrend on Sunday is expected with modest drying, keeping the highest thunderstorm chances across southern Gila County.
343 AM CDT Sat Jul 25 2020 Showers and storms have lingered across the trough axis and along residual outflow boundaries, in the presence of a LLJ this morning. The upper-level low that will be responsible for flattening our heat-encapsulated upper- level ridge by Sunday will also usher in a cold front this evening. Due to the high instability and high moisture through the column, any thunderstorms have the potential to become strong to severe and produce heavy rain, though confidence is not particularly high in the severe threat given relatively sub-par shear. A cooler and much less humid airmass moves in on Sunday behind the frontal passage, and most should be precipitation-free as high pressure builds. High temperatures in the low to mid 80s are expected.
By Sunday, widespread 90s are expected south of the mountains, though it will feel warmer thanks to the humid air.
1147 PM EDT Fri Jul 24 2020 Clear skies and light winds will prevail into Sat morning as high pressure remains centered over Se Mi. Meanwhile, the warm plume to the west will fold southeast into the Lower Peninsula supporting an incremental climb in the temps - with the highest values over the Saginaw Valley, approaching 90*F. Surface dewpoints will climb to near 70*F with high temps in the lower 90s - making for a rather hot and steamy day.
The upper level ridge of high pressure remains firmly entrenched across the area, and will drift a bit to the west thru the short term. Looking ahead, there will likely be a bit more convective activity tomorrow, and temperature trends will top out in the lower 90's across much of the area tomorrow and Sunday.
353 AM EDT Sat Jul 25 2020 Building high pressure will maintain dry and warmer weather for the weekend.
/Today through Sunday/ Upper ridge remains anchored from the TX Panhandle through the Mid MS River Valley, as Tropical Storm Hanna continues its wwd push towards the S TX Coast. Ridging weak enough to allow for another round of aftn convection across the region, with the greatest coverage likely across our srn half.
145 AM EDT Sat Jul 25 2020 High pressure will settle over Ohio tonight as an upper level ridge also builds on Saturday, influencing the region with dry weather through the weekend.
340 AM CDT Sat Jul 25 2020 A 594 dam high centered over W OK will expand wwd today shunting convection toward the higher terrain mainly west of the Pecos River, altho isold showers or storms will also be possible across the far E Permian Basin per HRRR and NAM12.
Late on Sunday a cold front will move into the CWA.
Saturday will be very similar to the previous few days weather- wise with an upper level ridge building over the central and southern plains while an upper level trough traverses far southern Alberta and Saskatchewan. This will again bring highs in the low to mid 90s and increasing south winds in the late morning. By peak heating, the upper level ridge is expected to be directly above southwest Kansas.
High temperatures for today will be in the lower to mid 90s with heat index values in the upper 90s. Overnight low temperatures will be in the lower 70s for inland areas and in the upper 70s along the coastline. High temperatures for the weekend will be slightly above average, reaching into the lower to mid 90s.
323 AM CDT Sat Jul 25 2020 Upper ridge remains over the Southern Plains this morning, with the center expected to be placed a bit farther to the north today.
Dry weather should stay in place through the weekend with high pressure in control over central Indiana.
1145 PM MDT Fri Jul 24 2020 Overview: SW-SSW flow aloft will prevail over the High Plains -- on the northwest periphery of an upper level ridge centered over the Central/Southern Plains. With synoptic subsidence to the east (beneath the ridge) and SW-SSW flow aloft over the Rockies -- convection will largely be tied to diurnal heating/topography, suggesting that development will most likely occur in climatologically favored areas (i. We are finally looking at some relief from the heat and dry weather with several days of cooler temperatures and rain. An upper level area of high pressure is expected to remain over the TX/OK panhandles extending into Iowa with the ridge extending into the Great Lakes region. An upper level area of low pressure will continue to move east across the Saskatchewan and Manitoba provinces with the trough extending towards the SD/NE line.
The upper level ridge will be positioned over Oklahoma today with most of the moisture remaining just to the west of the forecast area. By tomorrow, the high will retrograde west and be located over the forecast area. Moisture from the Tropical Storm located in Mexico will wrap around the west side of the ridge in New Mexico and Colorado. With plenty of moisture present and enough daytime heating to mix the boundary layer, convection will form in the higher terrain. Temperatures today and tomorrow will be in the lower 90s with low temperatures in the 60s to lower 70s.
201 AM EDT Sat Jul 25 2020 Building high pressure will maintain dry and warmer weather for the weekend. Dry weather will continue through the weekend as a high pressure ridge builds across the eastern US.
214 AM CDT Sat Jul 25 2020 Upper level high pressure will remain centered over central and eastern Kansas today. Lows tonight will again be in the lower to middle 70s over most of the area. That upper level ridge will retrograde a bit on Sunday with strong upper low pressure also beginning to move east across the Canadian prairies. We are not seeing much of a change regarding sensible weather across the Ozarks with highs once again in the lower to perhaps middle 90s.
Weak high pressure is influencing the weather across Middle Tennessee, although there is still plenty of available moisture for the inevitable afternoon and early evening convection.
1146 PM CDT Fri Jul 24 2020 A continuation of the heat and humidity with isolated afternoon thunderstorms are the highlights of the short term forecast.
Upper trough continues to lift away from East Idaho today, with high pressure starting to build into the region.
114 AM EDT Sat Jul 25 2020 High pressure will build across the region through Saturday.
The next chance for thunderstorms will be tied to the advancement of a cold front (tied to the strong system well north in Canada). Cooler and drier airmass will have advected into the region. Guidance is in decent agreement and confidence is toward the higher end of the spectrum. Upper level low will propagate eastward across Canada, well north of the region. With a much cooler and drier airmass along with ridging across the region, anticipate a relatively stable weather pattern. Return flow and warmer temperatures anticipated by the end of the week, although still some uncertainty how quickly this may happen or if it will happen at all.
147 AM CDT Sat Jul 25 2020 Water vapor imagery and vorticity analysis show a sheared trough axis over north AL and east-northeast along the spine of the Smoky Mtns.
This convection developed along an inverted trough extending across Nebraska and South Dakota and has moved into a moist/unstable environment. Residual morning cloud cover is forecast to linger for a bit this morning but temperatures will quickly rise into the lower to possibly mid 90s again.
A bit warmer compared to yesterday based on 700 mb temperature trends. Cooler temperatures aloft, adequate moisture and upslope low level east winds will help increase the late day coverage of showers and thunderstorms. Somewhat cooler with more cloud cover and coverage of showers and thunderstorms.
345 AM CDT Sat Jul 25 2020 A cold front will bring scattered showers and thunderstorms across much of western and central North Dakota today and this evening. While mean wind vectors generally parallel to the initiating boundary may favor messy storm modes, this may be mitigated by a neutral to positive mid-level height trend through the day as the upper level low remains to the north.
With weakening of the 850 mb thermal ridge and an increase in clouds, expect some cooling today, with highs in the low to mid 90s. Expect lows in the low 70s.
Highs will be in the low 90s by Sunday with afternoon heat index values of 95 to 100.