Aikyam-Lab/Synoptic-Bench huggingface dataset:
339 PM EDT Thu Apr 21 2022 Discussion/Marine -- Warm front showers/storms Friday afternoon and Friday night -- Quiet weather is expected tonight and Friday morning as high pressure moves through the region. A warm front will move in from the south Friday evening.
1032 AM CDT Thu Apr 21 2022 The low-level jet continues to weaken and has led to significant weakening of the early morning convection across north MS. This is due an upper level ridge that begins to build into the area later today.
A mid-level ridge is building over the Deep South resulting in height rises and warm conditions. With partly cloudy skies, temperatures will warm into the lower 80s this afternoon with a continued warming trend into tomorrow. Forecast 1000-850mb thicknesses suggest we'll see highs in the mid 80s tomorrow as the center of the ridge moves over Central AL.
337 PM EDT Thu Apr 21 2022 A weakening frontal system will send a warm front through the area this evening, followed by a cold frontal passage toward daybreak Friday. High pressure will then build in from the west Friday into Friday night, then gradually weakens over the weekend.
318 PM EDT Thu Apr 21 2022 As the trough responsible for last night's precip pulls away from the Upper Great Lakes region, so too do the lingering rain showers, with the eastern U. By 12z Sat, the trough is in the Rockies and 12z Sun is in the upper Mississippi Valley. In the extended, the GFS and ECMWF show a 500 mb trough and closed low over the Red River Valley of the North 12z Sun which heads northeast with more energy dropping southward to keep a trough over the upper Great Lakes 12z Mon. This trough remains over the area through Tue before moving to the lower Great Lakes 12z Wed. The pressure gradient increases Friday evening as a low pressure system develops over the High Plains and the high pressure over the lake shifts east.
322 PM EDT Thu Apr 21 2022 A weakening frontal system will send a warm front through the area this evening, followed by a cold frontal passage toward daybreak Friday. High pressure will then build in from the west Friday into Friday night, then gradually weakens over the weekend.
1059 AM MDT Thu Apr 21 2022 Most recent upper air analysis shows mild upper trough near the Great Lakes region, with ridging over the Rockies. At the surface, low pressure sits over southern Manitoba, with an associated frontal boundary stretching from eastern ND down through west central SD. Deterministics are becoming more consistent with showing the higher end QPF amounts of 2 to 2.
113 PM EDT Thu Apr 21 2022 A weakening frontal system approaches the region this afternoon, with a warm frontal passage this evening, followed by a cold frontal passage toward daybreak Friday.
1232 PM EDT Thu Apr 21 2022 High pressure remains offshore of New England the Canadian Maritimes this afternoon, before a cold front moves into the area tonight. This front will push to our south Friday and Friday night as high pressure noses down into the Mid Atlantic from the north.
/Tonight through Friday Night/ Ongoing southerly flow will maintain warmer than normal, but dry conditions into the weekend across the Ark-La-Tex. That includes another mild night tonight as dew points in the low-to-mid 60s keep minimum temperatures ranging in the mid-60s under partly cloudy skies. This warm trend will continue into Friday as the Four State Region remains between surface ridging to the east over the East Coast and a robust trough to our west that will exit the Intermountain West into the Upper Great Plains.
251 PM MDT Thu Apr 21 2022 Water vapor imagery shows an upper low across the northwest Pacific Ocean, gradually moving onshore the West Coast. Upper flow across the Northern Plains have become more southwesterly ahead of the approaching trough. The low level jet will increase tonight across the western SD plains, with strong theta E advection. The cap will be stronger across central SD, which should hold off storms until the evening as a cold front pushes through.
An upper level trough remains positioned off the coast centered along 130W with a closed circulation around 45N. This is placing the Pacific Northwest under a southwest flow today with moisture ejecting from the trough across the region. Showers will decrease around and after sunset and the upper level trough will move inland with the low center moving into northern California by Friday morning. Temperatures will continue to run 5 to 10 degrees cooler than normal today.
141 PM EDT Thu Apr 21 2022 Southwest flow develops today as high pressure settles over the northern Atlantic.
1140 AM EDT Thu Apr 21 2022 Southwest flow develops today as high pressure settles over the northern Atlantic.
138 PM EDT Thu Apr 21 2022 A weakening frontal system approaches the region this afternoon, with a warm frontal passage this evening, followed by a cold frontal passage toward daybreak Friday.
210 PM EDT Thu Apr 21 2022 A warm front over the Ohio Valley will move northeast across the northern Mid-Atlantic today.
311 PM CDT Thu Apr 21 2022 High pressure centered off the New England coast extended southwestward to the Carolinas then westward into our area. Upper ridging was noted over the Lower Mississippi River Valley. Another high amplitude trough was moving onshore on the Pacific Coast. Temperatures at mid- afternoon were generally in the lower and middle 80s, although a few locations on the Mississippi Coast had fallen back into the upper 70s with winds off the 75 degree water in Mississippi Sound.
/issued 1032 AM CDT Thu Apr 21 2022/ The low-level jet continues to weaken and has led to significant weakening of the early morning convection across north MS. This is due an upper level ridge that begins to build into the area later today.
Some showers may linger into the late afternoon in the ridges with orographic lifting of low-level moisture. As the high builds in this evening and flow veers westerly, clouds may decay and skies will scatter out overnight. Friday will feature calm winds and building cloud cover ahead of an encroaching warm front.
(The rest of this afternoon ) Warm front continues to lift north this afternoon with warm and humid conditions south of the boundary.
Weak high pressure was to the west of central Indiana with a weak cold front just south of the area. The front to the south will begin to move back north as a warm front overnight. The low level winds won't be impressive, but there will be enough isentropic lift around to generate at least some scattered showers during the night, especially across the western half of the forecast area. With the warm front mainly south of the area still by Friday morning, temperatures will still dip into the upper 40s northeast to the middle 50s southwest (closest to the warmer air). Stronger forcing looks to be northwest of the area, closer to some upper energy moving around an upper ridge. Behind the warm front Friday night, lows will be in the upper 50s to lower 60s.
Expect temps in the low 70s. West of Interstate 95 temps should fall to the low to mid 60s. A secondary ridge builds into/merges with the existing broad ridge across much of the eastern CONUS/western Atlantic.
Water vapor imagery shows an upper low across the northwest Pacific Ocean, gradually moving onshore the West Coast. Upper flow across the Northern Plains have become more southwesterly ahead of the approaching trough. The low level jet will increase tonight across the western SD plains, with strong theta E advection. The cap will be stronger across central SD, which should hold off storms until the evening as a cold front pushes through.
1028 PM EDT Thu Apr 21 2022 High pressure will become established off the East coast giving our region a warming trend through the weekend.
949 PM CDT Thu Apr 21 2022 A 500-mb ridge currently centered along the northwest Gulf Coast is predicted to expand northeastward across the southeastern CONUS overnight, in response to the eastward motion of amplifying trough off the Pacific Coast. The stacked high/ridge will shift to the southeast Coastal areas, allowing southeast flow to persist. These trajectories will continue to be comfortably dry with dew points staying in the lower to middle 50s.
759 PM EDT Thu Apr 21 2022 Aviation -- Warm front showers/storms Friday afternoon and Friday night -- Quiet weather is expected tonight and Friday morning as high pressure moves through the region. A warm front will move in from the south Friday evening.
This afternoon's precipitation will change to a mixture of rain and snow showers late this evening and into tomorrow morning in valley locations as snow levels drop below 6000 feet when northerly winds bring in cooler air.
/issued 311 PM CDT Thu Apr 21 2022/ High pressure centered off the New England coast extended southwestward to the Carolinas then westward into our area. Upper ridging was noted over the Lower Mississippi River Valley. Another high amplitude trough was moving onshore on the Pacific Coast. Temperatures at mid- afternoon were generally in the lower and middle 80s, although a few locations on the Mississippi Coast had fallen back into the upper 70s with winds off the 75 degree water in Mississippi Sound.
Guidance is hinting at lowering visibilities creeping into the extreme western FL Panhandle and/or upper I-75 corridor, but confidence is on the low side. Expect a mix of sun and expansive field of fair weather cumulus off the Atlantic to contribute to high temperatures in the low-mid 80s.
High pressure will continue across the area, with dry conditions. A deeper, longwave trough is setting up in the Western CONUS and bringing several consecutive days of severe weather to the Great Plains. However, further downstream the phase shift of the jet stream means high pressure near the surface with upper-level ridging aloft for the southeast. Winds will be generally out of the southeast for several days advecting warm, moist air off the oceans into the area, with mostly clear skies allowing afternoon temperatures to climb into the low to mid 80s by tomorrow with temperatures overnight falling to near saturation with dewpoints and overnight low temperatures in the low to mid 50s.
Mountain showers are expected Friday afternoon, followed by warmer and drier conditions this weekend. Cool air aloft associated with an upper low positioned offshore from WA/OR combined with afternoon surface heating and waves of ascent rotating around the low are aiding in sufficient destabilization for widespread shower development across much of NWRN CA. Thereafter, lingering post-trough cold air aloft will support isolated showers across the interior mountains during Friday afternoon, and that will be followed by rising heights aloft and a period of dry weather through the weekend.
/issued 236 PM CDT Thu Apr 21 2022/ SHORT TERM (Now through Friday Night): Modest ridging aloft will give way to a sharp, progressive short wave trough digging into the Great Basin on Friday. Lee low pressure will deepen and a northern Plains storm system will develop late Friday. Thus, the pressure gradient between Gulf high pressure and Plains lower pressure will remain tight, and breezy, gusty southeast winds will continue through the short term.
At 6 PM MDT the main upper low was still off the Oregon coast 42N/130W with our CWA under moist southwesterly flow aloft. Within that flow a short wave trough moved into southwest Idaho late in the afternoon with a line of showers and a couple of thunderstorms with heavy rain and small hail. Overnight the main upper low will move inland and then along the ID/NV border on Friday, with more showers in our CWA until early afternoon before shifting east.
724 PM EDT Thu Apr 21 2022 High pressure will build southeast into the region tonight and Friday.
721 PM EDT Thu Apr 21 2022 High pressure will become established off the East coast giving our region a warming trend through the weekend.
524 PM MDT Thu Apr 21 2022 Water vapor imagery shows an upper low across the northwest Pacific Ocean, gradually moving onshore the West Coast. Upper flow across the Northern Plains have become more southwesterly ahead of the approaching trough. The low level jet will increase tonight across the western SD plains, with strong theta E advection. The cap will be stronger across central SD, which should hold off storms until the evening as a cold front pushes through.
740 PM EDT Thu Apr 21 2022 Pattern continues to be a broken record next several days as a large area of high pressure along the mid Atlantic coast and over the western Atlantic ocean will extend across the Florida peninsula.
Expect this clearing trend to continue as high pressure builds right overhead tonight. Some lingering cloud cover over the Eastern Upper will persist through late afternoon due to the effects of the low pressure centered over James Bay. But, most of the forecast area is under strengthening subsidence as high pressure overspreads much of the Great Lakes Region tonight. Overnight lows will generally be in the low to mid 30s. Friday, expect some sunshine early, but clouds will quickly move in from the southwest by the afternoon as a warm front approaches with a Plains low. This will push daytime highs into the mid to upper 40s north of the bridge with low to mid 50s across Lower Michigan.
712 PM EDT Thu Apr 21 2022 High pressure will build southeast into the region tonight and Friday.
1057 PM EDT Thu Apr 21 2022 High pressure will build southeast into the region tonight and Friday.
844 PM EDT Thu Apr 21 2022 Only a slight rain chance will accompany a Friday night warm front. Building high pressure will ensure dry weather and diminishing clouds tonight. Friday will feature calm winds and building cloud cover ahead of an encroaching warm front.
/issued 313 PM CDT Thu Apr 21 2022/ The trough over the Great Lakes is pulling off to the east while a second, deeper trough is taking shape over the West Coast.
An upper trough along the West Coast this evening will move through the Great Basin on Friday.
Under clear skies, we will effectively radiate and lows will dip into the lower 60s F and upper 50s F. For Friday, the ridge maintains control and we should see another fair and warm day with highs again in the middle 80s F. /86/ Friday night through Thursday: By Friday night an amplified trough/ridge pattern will be over the CONUS with the upper level trough over the western CONUS and the ridge over the southeast. This will lead to warmer than normal temperatures through the weekend along with a slow increase in moisture.
Temperatures currently range from the low 60s north to the lower 70s in the southeast.
Ridging will become more stacked through the atmosphere tonight across the southeast U. The stacked high/ridge will shift to the southeast Coastal areas, allowing southeast flow to persist. These trajectories will continue to be comfortably dry with dew points staying in the lower to middle 50s.
A cold front pushed through NorCal this morning and stalled out over the northern San Joaquin Valley northeast into the Sierra. Scattered thunderstorms have been ongoing along and ahead of the front as the main trough remains further to the west over the Pacific. Shower and thunderstorm activity has been very limited behind the cold front due to a lack of forcing. That may change some as we head into the late afternoon and evening as the trough push south and east and we see some vorticity advection move over the area. Showers will continue during the overnight as the tough axis passes to our south with the best chances over the higher elevations. Short wave ridging builds in over the weekend with warming temperatures.
637 PM CDT Thu Apr 21 2022 (The rest of this afternoon ) Warm front continues to lift north this afternoon with warm and humid conditions south of the boundary.
355 AM CDT Fri Apr 22 2022 A large, nearly stationary, upper level ridge over the southeast quarter of the country will help keep conditions rainfree for the next couple of days. In the lower levels, southerly breezes between high pressure off to our east and low pressure off to the west will bring unseasonably warm temperatures to the four state region. High temperatures both today and Saturday are expected to make it into the lower 80s over most of the region.
Surface ridging is present over E Conus and into the Central Atlantic Coast this AM. We have a general weak E-SE flow into Central Alabama in the lower levels. This movement will help to nudge our ridge some creating a tad more onshore flow by late Saturday. This setup is favoring the highest dew points in W through the short term. We will remain mostly clear of cloud cover and rain free with upper level ridging over the SE US and a general subsidence in control.
344 AM CDT Fri Apr 22 2022 Breezy and warmer conditions will be on tap across central Illinois today as a warm front lifts northward through the region. Only isolated showers are noted across the KILX CWA presently: however, as warm front pushes through the region widely scattered showers and thunderstorms will develop as the morning progresses. Low temperatures will remain in the lower to middle 60s. As the pressure gradient tightens ahead of an approaching cold front, southerly winds will gust up to 35-40mph. With partly to mostly sunny skies anticipated, resulting afternoon highs will soar into the lower 80s. A line of convection will develop along the cold front from western Iowa into eastern Kansas Saturday afternoon, then will shift eastward and weaken considerably as it spills into west- central Illinois Saturday night.
GC Chattanooga Airport, TN 83 58 83 60 84 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 82 57 85 58 84 / 0 0 0 0 0 Oak Ridge, TN 82 56 84 58 83 / 0 0 0 0 0 Tri Cities Airport, TN 79 54 83 55 84 / 0 0 0 0 0.
/issued 1011 PM CDT Thu Apr 21 2022/ Upper ridging will build across the area for the next few days with mostly clear skies and warm weather. /issued 313 PM CDT Thu Apr 21 2022/ The trough over the Great Lakes is pulling off to the east while a second, deeper trough is taking shape over the West Coast.
Drier and much warmer air will build into the area for the weekend.
An upper trough along the West Coast this evening will move through the Great Basin on Friday. Weak high pressure will move over Western Washington through Saturday.
Water vapor imagery shows an upper low across the northwest Pacific Ocean, gradually moving onshore the West Coast. Upper flow across the Northern Plains have become more southwesterly ahead of the approaching trough. The low level jet will increase tonight across the western SD plains, with strong theta E advection. The cap will be stronger across central SD, which should hold off storms until the evening as a cold front pushes through. In general, most of these areas will see over 10 inches of snow, with the highest amounts expected across the northern Black Hills where two feet of snow isn't out of the question.
A 500-mb ridge currently centered along the northwest Gulf Coast is predicted to expand northeastward across the southeastern CONUS overnight, in response to the eastward motion of amplifying trough off the Pacific Coast. The stacked high/ridge will shift to the southeast Coastal areas, allowing southeast flow to persist. These trajectories will continue to be comfortably dry with dew points staying in the lower to middle 50s.
TODAY AND TONIGHT, a warm front will lift northward across the region. Did increase the winds toward the higher end of the guidance, and expect areas in southwest Minnesota to have gusts near or above 45 mph, with lesser winds northeast of I-94. Highs on Saturday still hold steady in the lower 70s, with dewpoints in the upper 50s. A cold front will push in from the west, with a narrow corridor of steeper lapse rates moving overhead.
Guidance is hinting at lowering visibilities creeping into the extreme western FL Panhandle and/or upper I-75 corridor, but confidence is on the low side. Expect a mix of sun and expansive field of fair weather cumulus off the Atlantic to contribute to high temperatures in the low-mid 80s. Well-established ridging over the region is poised to reinforce the warming trend and dry weather.
A warm front has pushed thru to the north, and a much warmer and more humid airmass was in place across the Natural State this afternoon. A ridge will build into the area tonight and tomorrow as a trof takes shape across the western US. The warmer airmass and the ridge will send afternoon temps soaring into the 80's tomorrow and Saturday, with overnight lows in the 60's.
128 AM EDT Fri Apr 22 2022 Aviation -- Warm front showers/storms Friday afternoon and Friday night -- Quiet weather is expected tonight and Friday morning as high pressure moves through the region. A warm front will move in from the south Friday evening. It will be cooler up near Big and Little Sable Point where southerly winds will sweep lake air into places like Pentwater and Ludington.
/Today through Saturday/ The ridge to our east looks likely to hang on strong over the course of this short-term. This ridge will keep the clockwise flow pumping, which will keep our winds sustained from the south. Overnight lows tonight should also be on the warmer side, with lows dropping into the mid to low 60s. By tomorrow, the next big trough will be situated across the plains, continuing to move east. The pressure gradient overhead, situated between the trough to our west and ridge to our east, will begin to tighten. /Saturday Night through Friday/ A tight pressure gradient will remain in place through the second half of the weekend in response to a deep upper trough across the Great Plains and High pressure across the Mid-Atlantic.
High pressure is situated to our east, so look for excellent return flow today with winds increasing to 6+ kts by 15Z.
A large/strong upper level trough currently centered near the northern CA coast will move east today, with the center of this low near SLC by this evening.
340 AM EDT Fri Apr 22 2022 A backdoor cold front will move south through the region Friday.
446 AM EDT Fri Apr 22 2022 High pressure builds in from the west into tonight, remaining in place over the weekend.
A strong upper level trough will eject into the Rocky Mountain region today and progress northeastward into Northern Plains on Saturday. As such, the high wind watch will now start at 03z Saturday and will be expanded one row of counties eastward and extended to 12z. If a storm can get going earlier in the day ahead of the dryline supercells will be possible with all severe hazards, however with the poor lapse rates storms will likely hold off until the cold front overtakes the dryline and a linear storm mode is favored.
Between the clouds, rain, and onshore winds today, temperatures will likely struggle at the surface, despite the warmer conditions aloft. Some question remains with temps near the lake, as a slight variation of the southerly winds could bring in the warmer temps to the lakeshore or the colder temps in from Lake Michigan.
That said, we will remain under the effects of the aforementioned inversion as well as low level ridging. Otherwise, windy conditions will prevail as a strong surface anticyclone remains anchored along the Eastern Seaboard. Strong high pressure will remain anchored over the region through the period.
Today through Saturday Night Early this morning, upper level ridging was located over the western Gulf of Mexico. Disturbance moving around the periphery of the ridge has generated some isolated showers over the Ozarks early this morning, and this will continue into the morning before the upper ridge pushes them north of the region. Today will be warm, with stratotcu/altocu streaming around the periphery of the ridge. Warm weather will continue into tonight and Saturday, with rain chances increasing late in the period, as cold front approaches western Arkansas from the Plains.
High pressure will dominate at the surface and aloft, bringing temps that will run 5 to nearly 10 degrees above normal.
200 AM CDT Fri Apr 22 2022 Upper high now positioned over the deep south with ridging extending eastward across the Carolinas. Southerly surface winds and 850 mb temps approaching 13C will allow for our afternoon temps to warm into the lower to mid 80s.