Aikyam-Lab/Synoptic-Bench huggingface dataset:
312 PM EDT Thu Jul 6 2017 Another hot day was observed across the region with temperatures in the low to mid 90s. An upper trough across the Ohio Valley stretching southwest to the ArkLaTex region will push southeast into northern Georgia on Friday. The deep layer ridge east of Florida will shift slightly southeast, and the flow will become more southwesterly. It will be hot once again, with highs in the low to mid 90s and heat indices in the 100-108F range. Upper trough amplifies over the eastern U. this weekend as upper ridge along the GA-FL line shifts east.
645 PM EDT Thu Jul 6 2017 A cold front over Wisconsin will move southeast across the area Friday afternoon into Friday night.
401 PM EDT Thu Jul 6 2017 Low pressure developing over the Ohio Valley will track south of Pennsylvania late today and tonight.
Western half of the country is being dominated by a strong ridge with troughing/split flow over the eastern portion of the country. The Gfs was doing a little better on the low level thermal field. However, potential is for warmer than what I have in there. Would like to go with higher pops than what I was given, however there is enough difference in the output as to where and when the thunderstorms develop, due to difference in frontal position and how far to the west the ridge pulls back, will keep pops at or close to what was given me. A little disconcerting is that the high resolution output does not break out convection until the night.
1148 AM MDT Thu Jul 6 2017 High pressure remains centered over the Four Corners through Thursday night. it appears that the high pressure center shifts ever so slightly west today, so forecast highs today are a degree or so below highs yesterday or about the same. On Friday and through the weekend, the center of high pressure shifts westward to be centered over Utah and Arizona, but won't make much if any difference in available moisture.
239 PM MDT Thu Jul 6 2017 The strong ridge over the western U. Convective development should originate over the higher elevations will most storms remaining dry, or with only very narrow rain shafts.
Strong high pressure aloft will remain locked in across the western states through the upcoming weekend.
102 AM EDT Mon Jul 3 2017 A cold front will bring a chance of showers and thunderstorms back to the forecast on Monday. A cold front will start to advance southward toward the area on Monday morning. Monday's cold front will remain stationary near the Mason-Dixon line through much of the period, and a chance of showers/storms will linger across southern counties.
353 AM CDT Mon Jul 3 2017 An upper ridge is currently in place over the Gulf Coast from the Florida Panhandle to Texas. This very low moisture in combination with subsidence from high pressure aloft will once again suppress convection for all of the CWA today. Mixing of lower dewpoints above the surface will allow for temperatures to rise into the low to mid 90s, but at the same time keep heat index values around 100 degrees. Now, both the GFS and ECMWF indicate the upper ridge will resist breaking down until later this week.
High pressure will build across the region through the first half of the week, with moisture increasing from the south during the middle and latter portions of the week.
A mean layer (1000-500 MB) broad trough will be across the area as the ridge will be well south of the area. Strong storms also possible across much of southeast Ga (including coast) where short wave energy (traversing the broad trough) helps enhance storms there. Hot conditions prior to storms with max temps reaching the lower to mid 90s across inland areas with afternoon heat indices around 105 degrees.
346 AM EDT Mon Jul 3 2017 A cold front will bring a chance of showers and thunderstorms back to the forecast on Monday. A cold front will continue to sink southward into the region today, reaching the general Pittsburgh vicinity by 00Z. The exception may be the eastern ridges, where enough moisture may linger for isolated convection.
1145 PM MDT Sun Jul 2 2017 West flow aloft will weaken through the week as a large high pressure ridge builds north northeast from the great basin into the northern Rockies. A large high pressure ridge will continue to build north northeast from the great basin into the northern Rockies. West flow aloft will weaken through the week as a large high pressure ridge builds north northeast from the great basin into the northern Rockies.
459 AM MDT Mon Jul 3 2017 12Z TAF CYCLE Upper high center to drift nwwd into se AZ next 24 hrs. The upper high will build northward during the week.
540 AM CDT Mon Jul 3 2017 07z/2am surface analysis shows a weak cold front extending from northern Iowa to southern Lake Michigan. have included an isolated mention:however, with dewpoints once again mixing into the lower 60s, both instability and forcing will be minimal.
Warm temperatures and increased afternoon breezes (10-20 mph) are likely today with a passage of a weak and dry cold front. High temperatures will be 20 degrees above average and will range from the mid to upper 90s in most valley spots with a few locations reaching the low 100s by the end of the week.
405 AM CDT Mon Jul 3 2017 Early morning sfc analysis shows high pressure centered over the ern Gulf providing for our typical srly low-level flow this morning. Water vapor imagery shows a disturbance in the wrly flow aloft passing to our north, while flat ridging is noted closer to home. With that said, forecast soundings indicate enough dry air and capping thanks to the ridging aloft to preclude convective development across our region today. Despite temps peaking in the low/mid 90s area-wide, dry air aloft should mix down enough to drop dew points back to the lower 70s which should keep heat indices to the 100-104F range around max heating. Tuesday appears to be a repeat of today with the ridging keeping precip chances at bay.
216 AM MDT Mon Jul 3 2017 Convection ongoing from the Blkhls into scntrl SD early this morning with upper trof moving overhead. Lingering instability could lead to a few storms again on Tuesday, but upper ridge expected to amplify across the wrn Conus and bring drier and hotter wx mid to late week.
356 AM CDT Mon Jul 3 2017 Went near the higher end of guidance for highs today, with temperatures in the 80s as clouds and precipitation look to be a little more limited in coverage.
With s/wv ridging building in behind this lead wave, we will see a period of limited or no convective chances for much of the mid part of the CWFA Tuesday night.
136 AM EDT Mon Jul 3 2017 Weak high pressure through Monday with warm and somewhat drier air.
SHORT TERM (Now through Tuesday):H5 ridge stretched across the southern US begins to build northward along the spine of the Rockies, continuing to deflect weather systems away from South Texas.
507 AM CDT Mon Jul 3 2017 Left over convection from last evenings showers and isolated storms was in the form of sprinkles in the Bismarck-Mandan area, and showers from Wells County into Foster County and pushing east, away from the forecast area, with the mid level short wave trough. Very warm today with sunshine, after the early morning clouds, and southeast winds 10-20 mph maintaining low level moisture in the lower 50s for dew point temperatures. CAPE and instability are sufficient, along with the low level moisture, but lacking is any lifting mechanism surface to mid levels, at least until this evening. This as lower theta layers (H925-H850) with thermal ridge were a bit cooler.
Surface-850MB mb ridge axes will remain near or a little south of a MLB-TPA line over the next 24 hours. A flat and somewhat weak mid level ridge remains draped across the peninsula, while we remain on the back side of a retrograding TUTT type low centered over the north central Caribbean. Ridge axis of high pressure over the west Atlantic will drift slightly north to a position near or north of the Cape into mid week, with a TUTT low shifting gradually westward over the southern Gulf of Mexico.
Isolated showers and continue to percolate along a stalled cold front across northeast Iowa and far southern Wisconsin early this morning. High pressure, centered over the western Great Lakes, will start to edge east late tonight into Tuesday morning.
529 AM EDT Mon Jul 3 2017 A cold front will bring a chance of showers and thunderstorms back to the forecast on Monday. A cold front will continue to sink southward into the region today, reaching the general Pittsburgh vicinity by 00Z. The exception may be the eastern ridges, where enough moisture may linger for isolated convection.
345 AM MST Mon Jul 3 2017 Temperatures will remain above normal through this week as high pressure predominates across the Desert Southwest. A gradual increase in moisture will lead to isolated thunderstorm development over mainly the higher terrain of Arizona through midweek. The threat of thunderstorms will then expand westward into the lower deserts late this week and weekend. A quiet morning across our CWA this Monday with mostly clear skies and temperatures still hovering in the low 90s for Phoenix.
00Z upper air analysis depicts a weak low level trough drifting east across the region. High generally in the lower 90s, with a few locations in the mid 90s. Low temps Monday night are again expected to be in the lower to mid 70s.
319 AM EDT Mon Jul 3 2017 A cold front will cross the region today.
343 AM CDT Mon Jul 3 2017 Showers and thunderstorms along the Missouri/Arkansas border is being generated in low level moisture convergence ahead of an upper trough over western Arkansas. The resulting low level trof over the Plains will continue to bring warm and moist air up into the Mid Mississippi Valley through the day.
1125 PM MDT Sun Jul 2 2017 Current KCYS radar loop shows thunderstorms developing near the Pine Ridge from north of Lusk southeast towards Alliance Nebraska this afternoon. High temperatures will be similar compared to today with afternoon readings in the 80's to low 90's, with western Nebraska likely a few degrees cooler due to the location of the disturbance. Tuesday will be similar to Monday, but a few degrees warmer as the strong upper level high begins to develop to the southwest. Any activity on Tuesday should not be intense due to warmer air aloft.
High temps on Mon are expected to be in the upper 80s to mid 90s acrs the plains, and mostly in the lower 80 in the upper Arkansas and San Luis valleys. high pressure will build across the Intermountain West Monday night into Tuesday, while a slow moving upper disturbance will move across Kansas. The high pressure building to the west will begin to shift eastward into Colorado, with Tuesday being the last day of northwest flow and possible showers and thunderstorms across most of the region.
248 AM PDT Mon Jul 3 2017 High pressure over the Great Basin will keep conditions dry with temperatures running above seasonal averages through the 4th of July.
500 AM EDT Mon Jul 3 2017 A weak cold front will sag south across the state today. The front will be followed by a brief period of slightly cooler and less humid conditions for the 4th of July accompanied by light wind. A cold front will pass early in the weekend and dry things out. Maxes look cooler on the whole today than over the weekend with clouds and the front advancing through. High pressure just doesn't forcibly push in from the NW and takes a more easterly track across lower Ontario and NY state. The latter part of the work week should be more active with another trough swinging through the Southern Great lakes region and the OH valley.
Developing Four Corners high pressure system will produce hot weather throughout northern and central Nevada this entire week with daytime temperatures soaring into the mid 90s to lower 100s. Building Four Corners high pressure system will create hot weather for northern and central Nevada throughout the week.
126 AM EDT Mon Jul 3 2017 A weak back door cold front will sag south across the state Monday. The front will be followed by a brief period of slightly cooler and less humid conditions for the 4th of July accompanied by light wind. Cold front right over and parallel to the axis of the lower lakes at 05Z. Maxes look cooler on the whole today than over the weekend with clouds and the front advancing through.
407 AM CDT Mon Jul 3 2017 Early morning satellite imagery shows us that the large ridge to our west has moved in across the center of the Nation, with a weak trough burrowing through the ridge axis across the Central and Southern Plains. While this has pushed the general storm track north with the prevailing jet stream, and allowed seasonally warm and muggy temperatures to dominate, the weakness under the ridge has been more than sufficient to get convection going in areas from the Central High Plains into the southern Plains resulting in a couple of convective complexes move across the region early this morning.
60" Last nights Sonora MCS sent outflow into the GofC which has resulted in a gulf surge into the lower deserts. Last nights upper air plots placed center of upper high over northern Chihuahua.
The large upper level ridge will remain in place across the western U. 00Z model 850mb temperatures show some packing of the isotherms and some cooling across the northern portions of the CWA with what looks like a weak backdoor cold front or boundary. This may allow for slightly cooler temperatures on Tuesday, particularly in the northern half of the forecast area close to the Canadian border where highs may remain in the upper 80s to near 90. Upper ridge over the desert southwest extends north into the Canadian prairies for most of the period.
337 AM EDT Mon Jul 3 2017 A weak cold front will sag southward across the region today.
Model guidance continues to show strong high pressure build in through the week. The Snake River plain, Eastern Magic Valley, and portions of the Southern Highlands will be in the low to mid 90s early this week becoming near 100 by mid week and continuing through the weekend.
647 AM EDT Mon Jul 3 2017 A weak cold front will sag southward across the region today.
512 AM EDT Mon Jul 3 2017 An upper-level composite analysis this morning reveals a mid- to upper-tropospheric, cold-core cyclone moving west-southwestward over central Cuba. The system has deepened during the last 24 hours, based on layer mean wind analyses, and as a consequence, is coupled, to some extent, with the lower troposphere. Satellite animations reveal greater coverage of deep cumulus convection surrounding the cyclone, although several areas with deep, dry air are noted spiraling into the circulation from surrounding areas. The mid/upper cold-core cyclone should weaken as it moves farther west-southwestward, with waning influence locally. The large-scale subtropical anticyclone will dominate the local weather for the next seven days, with near-climatological rain chances, air temperatures, and winds.
312 AM EDT Mon Jul 3 2017 Typical summer pattern will persist this week with Bermuda high pressure extending from the Western Atlantic into the Gulf of Mexico and a lee side trough of low pressure over the Carolinas. A broad upper trough will continue over the eastern CONUS with an upper ridge over the western states.
209 AM CDT Mon Jul 3 2017 High pressure will continue to build to the west over AZ/NM today, keeping us in northwest flow.
Farther south and east, rain chances will be less as mid level ridging has more influence, and greater insolation will make heat stress the primary concern as heat indices approach 105 in some cases.
Yet another complex of thunderstorms is forecast to develop Monday afternoon, as a mid-level wave (now over southern Colorado) strengthens and moves into the High Plains of Colorado, then into southwest Kansas.
Wed & Wed Night: A weak sfc-850mb low begins to develop over the KS/MO border from which a weak trof would extend into central OK. Thu-Fri Night: Broad & strong ridging spreading east across the Great Plains will keep the weather quiet. Details are sketchy as there are differences among models with respect to positioning of strong mid-upper high that should cover the southern plains. Other storms are likely to form over the high Plains Monday afternoon/evening, translating slowly eastward across Kansas Monday night.
At the surface a trough will persist through the period. Monday PoPs will be 20-40% with the highest chances for the eastern half of the CWA. Tuesday PoPs will range from 30-50% with the highest chances along and north of I-10. Less cloud cover will allow temperatures to rise to the low to mid 90s each day.
A cold front extending from WI southwest through northern IA will sag southward tonight, but it appears that convection associated with this feature will remain north of the forecast area. The latest guidance has trended slower with the approach of an upper level low/PV anomaly which will be located across the central Plains Monday night. Given this location, the better isentropic ascent associated with the low-level jet will focus into the theta-e boundary located across KS and southwest MO. These preferred solutions suggest a moistening of the boundary layer through the day on Tuesday as a warm front lifts northward across the area. This low-level moistening will lead to building MLCAPE values throughout the day.
500 AM MDT Mon Jul 3 2017 Convection ongoing from the Blkhls into scntrl SD early this morning with upper trof moving overhead. Lingering instability could lead to a few storms again on Tuesday, but upper ridge expected to amplify across the wrn Conus and bring drier and hotter wx mid to late week.
112 AM EDT Mon Jul 3 2017 A weak cold front will push down into the area tonight through Monday and then stall out across the region through mid week. Expect lows tonight in the low to mid 60s. The cold front will continue to sag slowly south through the day on Monday and eventually stall out across central portions of our fa. Weather will be influenced by an upper trough that will be positioned over the Eastern CONUS for most of the period. For Tuesday, a few thunderstorms may develop along a warm front aligned along the western flank of the broad upper trough.
Tuesday looks like a very pleasant day, with lots of sunshine, and low humidity, courtesy of a large high pressure system. Otherwise, a dry and pleasant night is forecast, with temperatures dropping into the lower and middle-60s before sunrise. A large northern stream upper trough will descend over Eastern Canada, then deepen along the Eastern seaboard by the end of the week. GFS/GGEM and ECMWF all indicate that this digging trof will capture a surface feature in the Central Plains and lift it toward the Northeast.
Overall, the synoptic pattern remains unchanged from previous days with weak ridging in place. Highs today will top out in the middle 90s to 102 degrees with the higher temperatures across the Rio Grande Plains where the air will be driest. The upper ridge will be more amplified and centered over the Rockies by tomorrow and there are some indications of possible showers again in the eastern Counties as southerly flow slightly increases in the low-levels.
The synoptic pattern remains quite similar for the daylight hours of Monday, comprised of the subtropical ridge axis directly across the central peninsula, and a resulting light gradient/ variable synoptic flow.
403 AM MDT Mon Jul 3 2017 Weak upper low and trof across Central Colorado early this morning with a fair amount of middle and high level cloudiness lingering through the night. Back edge of upper trof still back over western Wyoming and northwest Colorado. Trof will work its way southeast with increasing northwest flow at all levels by this afternoon. QG fields showing weakly subsident airmass moving in later this afternoon behind the trof with diminishing convection in most areas by evening except over the far east. Overall, temperatures similar to a few degrees cooling today with trof passage.
306 AM CDT Mon Jul 3 2017 07z/2am surface analysis shows a weak cold front extending from northern Iowa to southern Lake Michigan. have included an isolated mention:however, with dewpoints once again mixing into the lower 60s, both instability and forcing will be minimal.
Otherwise, temperatures will warm into the lower 90s with continued humid conditions with heat index values around 100 degrees or a bit higher. Monday night to Tuesday, the next MCS tracks more across northern AR, and the highest chance of convection will be over that region.
634 AM EDT Mon Jul 3 2017 A weak cold front will sag south across the state today. The front will be followed by a brief period of slightly cooler and less humid conditions for the 4th of July accompanied by light wind. A cold front will pass early in the weekend and dry things out. Maxes look cooler on the whole today than over the weekend with clouds and the front advancing through. High pressure just doesn't forcibly push in from the NW and takes a more easterly track across lower Ontario and NY state. The latter part of the work week should be more active with another trough swinging through the Southern Great lakes region and the OH valley.
Expect scattered convection to develop in association with this feature and a "warm front" or moisture gradient lifting north from eastern Oklahoma and Arkansas.
A ridge of high pressure will continue over the region with a small upper level low pressure off the coast of northern California. The ridge will provide another very hot day today with temperatures around the Lower Columbia Basin 100 to 105 degrees with a heat advisory in effect.
Other area of showers and a few t-storms east of the upper low now northwest of Minot. The warm advection precip will slowly move east and then will see redevelopment over E ND east of the upper low during the day/eve. Showers and t-storms east of the upper low will spread slowly into DVL region this morning and gradually thru the fcst area later today/this evening. Upper low associated with Wednesday system moves into northwest WI during day Thursday.
950 AM EDT Wed Aug 9 2017 High pressure will build in through Wednesday, then pass east on Thursday.
1223 PM EDT Wed Aug 9 2017 High pressure will build in today, then pass east on Thursday.
1117 AM EDT Wed Aug 9 2017 Building high pressure will provide dry weather into Thursday, with a chance of rain extending through the weekend.
612 AM CDT Wed Aug 9 2017 High pressure was located over northern Illinois early this morning. Dry weather is expected through this evening as a retreating high will keep the low levels dry. A long wave trof of low pressure will remain in place over eastern North America with west-northwest flow aloft over the Midwest.
933 AM EDT Wed Aug 9 2017 High pressure will pass overhead today before shifting off the coast on Thursday.
Chattanooga Airport, TN 84 70 83 71 / 50 40 70 40 Knoxville McGhee Tyson Airport, TN 84 69 82 68 / 20 30 70 40 Oak Ridge, TN 84 69 81 69 / 20 30 70 40 Tri Cities Airport, TN 85 64 81 65 / 10 20 70 40.
Showers continue to develop on the periphery of a weak upper level low and will affect GLS and LBX through about 15z.
1203 PM EDT Wed Aug 9 2017 A large area of high pressure will slowly move across the region today and tonight before exiting off the Mid Atlantic Coast Thursday. Thursday, weak low pressure will move east through the Tennessee Valley as another low moves into the western Great Lakes. With high pressure dominating the weather today, the current forecast appears on track. Today and tonight high pressure will dominate the region. Thursday the high will drift off the east coast and low pressure will move into the western Great Lakes. Moisture will increase across the region, especially the eastern half of the area through Thursday ahead of the low.
1016 AM EDT Wed Aug 9 2017 High pressure will build in today, then pass east on Thursday.
Upper low continues to exist off the NW California coast helping to moderate temperatures and keeping a threat of showers and thunderstorms, mainly over the mountains. Water vapor imagery reveals a strong vort max rotating around base of upper low at this time and is forecast to track across Interior NorCal tonight. Models similar in tracking the low inland across Interior NorCal Thursday.