Aikyam-Lab/Synoptic-Bench huggingface dataset:
1105 AM CST Fri Dec 22 2017 Have updated the forecast to adjust the daytime highs for some locations with some having reached the expected high with falling temperatures for parts of Northeast Texas, Southeast Oklahoma, and Southwest Arkansas in wake of the cold front. Current cold front extended from near a Nashville to Ashdown Arkansas, Maud, Gladewater, and Palestine Texas line. /issued 327 AM CST Fri Dec 22 2017/ Shwrs rapidly developing ahead of an approaching upper low over wrn NM. Upper trof to move into the Upper Red River Valley tonight, finally forcing the front and associated convection to push ewd. Much cooler temps are expected for Saturday in the wake of the cold front. Clouds unlikely to clear completely, however, as another disturbance/cold front is fcst to dive sewd in nw flow aloft Saturday night.
with additional rains tonight and at least early Saturday until the strong cold front arrives.
354 PM CST Fri Dec 22 2017 Cold front currently stretching from Great Lakes region southwestward through the middle Mississippi Valley and into central Texas.
1210 PM CST Fri Dec 22 2017 A cold front extends from near a PSN to just W of GGG, to just W of TXK, to HOT line as of 1730Z. /issued 1105 AM CST Fri Dec 22 2017/ Have updated the forecast to adjust the daytime highs for some locations with some having reached the expected high with falling temperatures for parts of Northeast Texas, Southeast Oklahoma, and Southwest Arkansas in wake of the cold front. Current cold front extended from near a Nashville to Ashdown Arkansas, Maud, Gladewater, and Palestine Texas line.
However, some of this mid-level frontogenesis clips far southeast Kansas, with upper level divergence progged also with the approaching trough. Light rain, sleet, freezing rain has been reported in Oklahoma. Thermal profiles and surface wetbulb temperatures suggest the onset precipitation type could be a mix of light rain, freezing rain, and/or sleet, with a transition to more light sleet/snow by late evening into the overnight. Very light freezing/rain sleet could cause slick spots, especially on overpasses.
Sites expected to drop down periodically to IFR during periods of rain this afternoon and again tomorrow as a cold front approaches.
249 PM CST Fri Dec 22 2017 A cold front as of 2 pm was through College Station and Crockett.
945 AM PST Fri Dec 22 2017 A cold front dropping down from the north will bring light to locally moderate snow through today.
Surface wise, an elongated ridge of high pressure is aligned across the eastern seaboard and down the Florida peninsula.
A widespread light to moderate snowfall today will transition to a wintry mix of snow, sleet, freezing, and rain on Saturday, before ending as a period of snow again Saturday Night.
BMickelson Previous discussion: A cold front will move to the south this morning. Cold Canadian high pressure will build into the forecast area today. Clouds will linger over the area as the low to mid portions of the atmosphere remains moist remains in an upper trough that extends south from a Hudson Bay upper low. Cloudy skies will continue Friday Night and Saturday as upper trough remains over the area.
As we head towards this evening temperatures will begin slowly falling towards the freezing mark and into the upper 20s overnight. This would include bridges and overpasses. Daily afternoon highs will be in the 30s each day with overnight lows in the lower 20s to the teens.
125 PM PST Fri Dec 22 2017 Ridge builds across the west resulting in light winds and weak valley inversions developing through the end of the week. Periods of gusty winds are possible in the high Sierra through the weekend. Eastern edge of upper ridge nudges over the west coast going into the weekend with plenty of moisture riding over the top of the ridge bringing abundant mid and high level clouds.
247 PM CST Fri Dec 22 2017 The precipitation across south central and east central Oklahoma is expected to move off to the east while the approach of the center of the upper low from west Texas will bring a final chance for light precipitation across central sections of the state tonight. All the precipitation will be ending with the passage of the upper low early Saturday, most of it before sunrise.
303 PM CST Fri Dec 22 2017 The cold front that brought light snow to much of the region today has shifted to our far southeastern counties, and will be quickly to our east shortly after 00Z. An elongated area of high pressure set up across western Canada will build a ridge into the forecast area through Saturday.
249 PM CST Fri Dec 22 2017 (Tonight and Saturday) The cold front has pushed south of our area and temperatures are 35 to 40 degrees colder than 24 hours ago. For Saturday, expect warmer temperatures and light west to southwest winds.
1020 AM CST Fri Dec 22 2017 The cold front is moving through our extreme northeastern counties and is approaching the Austin area. These conditions will be in place for much of the day with some improvement expected as a cold front moves south into the region. A strong cold front extends from Pecos to San Angelo to Waco while an upper level trough is over far western New Mexico. The upper level trough will move across New Mexico today and Texas tonight. As the trough moves across Texas, showers and storms will end late this afternoon out west and this evening across the east.
249 PM CST Fri Dec 22 2017 What a difference a day makes! Temperatures this afternoon are over 20 to 30 degrees cooler than this time yesterday across portions of the area due to a cold front that's moving through the region. Any precipitation will gradually diminish by this evening as the upper trough lifts toward the Central Plains, with clearing skies expected to yield a very cold night tonight. Lows overnight will range from the lower 20s north and across the higher terrain to the upper 30s through portions of the Rio Grande Valley.
With the trough axis to our east, we're seeing sunny skies across the entire forecast area with temperatures in the upper 40's to lower 50's across most valley locations. Another night of favorable radiational cooling across the area tonight, though temperatures won't be quite as cold, so while a hard freeze is not expected for the deserts, temperatures will still bottom out around or just below freezing. Rapidly increasing height and thickness values this weekend with west to northwest flow as an upper ridge will reside off the west of the Baja peninsula.
345 PM EST Fri Dec 22 2017 A trough of low pressure meanders near the North Carolina coast tonight. Low pressure will move northeast from the Ohio Valley into the Northeast states Saturday, with its trailing cold front crossing the local area Saturday night.
201 PM CST Fri Dec 22 2017 Isentropic lift ahead of approaching cold front dropping southeast from North Dakota is producing light snow in northwest MN. While cooler air will filter in behind this front, temperatures won't plummet behind this front.
Northwesterly flow aloft prevails across the Interior West this morning, downstream from a mid level ridge centered off the Pacific Coast near 130W. A plume of moisture with tropical origins is noted spreading northward and overtopping the ridge axis as it approaches the Pacific Northwest.
A cold front sagging south across Washington and northern Oregon today will bring areas of snow to all elevations through Saturday morning. The Winter Weather Advisory for snow covering the Blue Mtn Foothills, the Lower Columbia Basin of Oregon, and north central Oregon is on track where 2-4 inches of snow are expected through Saturday morning.
There will be quite a range of snowfall totals across the Treasure Valley, with an inch or less expected in the Lower Treasure Valley near Ontario to 1-4 inches from the Boise metro area to Mountain Home. Temperatures above freezing this afternoon will lower to below freezing this evening resulting in slick roads. Greatest snowfall totals will be in the higher elevations of southwest Idaho, including the Owyhees.
856 AM PST Fri Dec 22 2017 It will be fair and dry through the weekend with a warming trend as high pressure builds aloft.
A prolong period of rain is forecast tonight through Saturday then low pressure will provide light snow Christmas Eve. Low pressure coming out of the Tennessee valley will spread widespread rain to the region through the near term. Temperatures will slowly fall through the near term back into the lower 40s by Saturday afternoon. The cold front will be through the CWA by the start, however residual moisture and arrival of cold air could bring around an inch of snow to the mountains of West Virginia and western Maryland during the evening hours before weak ridging takes hold shutting off measurable QPF.
Upper air analysis this morning showed a trough from Colorado to the Baja Peninsula with southwesterly flow over Texas. At the surface, a cold front was moving through our CWA with southerly winds ahead of the front and northerly winds behind it bringing colder air. High pressure will move across Central Texas Saturday and Saturday night keeping the weather dry and temperatures cool.
A cold front sagging south across Washington and northern Oregon today will bring areas of snow to all elevations through Saturday morning. The Winter Weather Advisory for snow covering the Blue Mtn Foothills, the Lower Columbia Basin of Oregon, and north central Oregon is on track where 2-4 inches of snow are expected through Saturday morning. A cold front will move gradually south across the region through the next 24 hours.
247 PM MST Fri Dec 22 2017 Overwhelming feature, synoptically, remains the large low pressure trough currently spread over most of Canada and the US northern tier states.
Northern Oklahoma was receiving reports of some light freezing rain and we will carry a mixture of light freezing rain/sleet/snow for parts of far Southeast Kansas.
822 AM PST Fri Dec 22 2017 A cold front dropping down from the north will bring light to locally moderate snow through today.
253 PM CST Fri Dec 22 2017 18z surface data has weak low pressure across central Indiana and a weak high from the upper Great Lakes into the central Plains.
1203 PM EST Fri Dec 22 2017 High pressure over the region is forecast to maintain quiet weather through the TAF period.
Ridge axis across the northern peninsula today associated with high pressure centered NE of FL will drop southward to the central CWA overnight/early Sat then settle toward the Lake Okeechobee region late Sat and overnight.
Chattanooga Airport, TN 61 56 64 40 / 70 50 90 10 Knoxville McGhee Tyson Airport, TN 59 54 62 40 / 80 50 100 30 Oak Ridge, TN 58 55 59 40 / 90 70 100 20 Tri Cities Airport, TN 59 49 63 38 / 70 60 90 50.
1138 AM CST Fri Dec 22 2017 A cooler more winter like pattern has started to set up over the area on the backside of a cold front that is currently moving through SE MO. This cooler airmass will settle into the area as high pressure builds into the central plains. High temperatures will be roughly 20 degrees cooler than yesterday, topping out in the mid 30s to upper 30s in central MO. The surface pattern will remain similar with high pressure entrenched over our area keeping cooler temps in place.
355 PM CST Fri Dec 22 2017 UA analysis and WV imagery show an upper low crossing NM, while southwesterly flow continues to transport abundant moisture acrs TX into the mid MS valley. At the sfc, a cold front sits from far northwest LA southwestward to near College Station then to San Antonio. 24 The upper low over NM will quickly eject over the southern plains tonight, and weaken as it approaches the lower MS valley. This will help push the cold front through the area overnight. Overnight lows are expected to fall to the upper 40s acrs the Lakes region of TX as colder air filters into the region while portions of Acadiana and the lower Atchafalaya Basin will only reach the lower 60s with the front just reaching these areas early Saturday.
129 PM PST Fri Dec 22 2017 It will be fair and dry through the weekend with a warming trend as high pressure builds aloft.
This should result in cooler temperatures with highs mainly in the 30s. A cold front will enter northern Colorado around mid afternoon.
With ground temperatures still quite warm, in the low to mid 40s, much of the snow will likely melt on contact, except in areas where the snowfall rates are high enough to overcome this issue. Will have partly sunny conditions Saturday afternoon with highs in the low 30s to low 40s. Cold hair behind the larger scale H5 low will keep Saturday highs from just above freezing in the I-75 area to the low 40s elsewhere.
/issued 436 AM CST Fri Dec 22 2017/ Upper level low over the four corners this morning is expected to dig just a bit further south today and traverse the CWA (perhaps slightly favoring the northern part) as the system begins to fill.
221 PM CST Fri Dec 22 2017 On the large-scale, water vapor showing a digging trough of low pressure across eastern New Mexico and western Texas this afternoon, with ample mid/upper-level moisture advection occurring downstream across the Southern Plains and lower Mississippi Vly. Meanwhile, regional radar imagery shows a swath of precipitation extending from eastern Texas northeast through the lower Ohio Vly, with the far northern fringes of these returns creeping up towards our southern CWA border. The one thing that does look a little different than yesterday is a slight northward shift in max QPF placement, with today's runs favoring the highest amounts along and north of the Route 36 corridor. The only exception continues to be the NAM which shows the higher axis further south between Route 36 and I-70.
A cold front has moved south through the region tonight and most terminals have gusty north winds this morning.
434 PM EST Fri Dec 22 2017 Low pressure over the Ohio Valley will slide east to the Atlantic coast through this evening. A cold front trailing off that low will move very slowly through the region by Saturday night. The cold front will take temps well below normal later Sat night.
Suspect these will persist into the evening for Devils Lake basin and northern valley, but some holes here and there in this low level deck will make for challenges to aviation and temperature forecasts. Water vapor loop indicated an upper level trough located over southern SASK and southern MAN, and another over northern SASK. Southern trough will move east across the northern valley and southern MAN for today. A cold front located over northwest ND will sweep across the forecast area today.
1231 PM EST Fri Dec 22 2017 Low pressure returns light rain with widespread rain expected tonight and Saturday.
A little cloudiness along the Montana/North Dakota border will slide east early this morning giving way to mostly sunny skies although near to slightly below normal temperatures as the back side of a departing upper level trough still remains close enough to eastern Montana to provide some influence. Upper level ridging is expected to build across the west starting on Monday which will maintain dry weather conditions and begin a warming trend in temperatures with the associated height rises.
This highly anomalous warm and moist environment is already yielding 1500 to 2500 J/kg SBCAPE. The rest of the forecast looks dry with temperatures climbing into the low to middle 70s, which is about 5 degrees above normal for this time of year.
325 AM CDT Sun Oct 15 2017 The cold front is passing through west central Illinois and central Missouri at this time. Model consensus has the cold front exiting our southeastern counties by 12Z and the last of the precipitation behind the front exiting by 15Z. There's a wide area of stratocu extending north into Iowa and Minnesota behind the cold front. Gusty northwest flow will bring much cooler air to the region and highs are only expected to hit the low 60s in most locations.
With temps in the low 50s and dropping into the 40s, these strong winds are going to make it feel quite cool and raw. Highs are expected to be in the low 60s.
320 AM PDT Sun Oct 15 2017 High pressure aloft and weak offshore flow will continue well above average high temperatures west of the mountains through Monday with high temperatures in the valleys and inland coastal areas in the 90s to around 100.
124 AM EDT Sun Oct 15 2017 A cold front will push through the region later Sunday.
For all of the week, high pressure will keep conditions dry.
Temps continue to fall overnight with high pressure building into the region.
114 AM EDT Sun Oct 15 2017 A weak cold front will stall across the area tonight. This front will move back to the north across the region as a warm front Sunday. A strong cold front will move across the area Sunday night. High pressure will build across the region from the west behind the front for early nest week. A weak backdoor cold front is slowly crossing Swrd into our Rgn from Ern QB. A cold front will be moving off the coast Monday with clearing conditions expected as high pressure builds in from the west.
130 AM EDT Sun Oct 15 2017 High pressure across the region will bring dry weather today. A cold front will cross the area late tonight and Monday, bringing a chance of rain.
154 AM EDT Sun Oct 15 2017 High pressure across the region will bring dry weather today. A cold front will cross the area late tonight and Monday, bringing a chance of rain.
The first fall front is on the horizon! But, before the passage Monday, high pressure across the Carolinas will be moving eastward and surface ridging will be weakening as the front enters N MS/AL this afternoon. Surface flow, especially west of us, will be influenced more by an inverted trough across the Gulf of Mexico and the front moving eastward. Highs will be in the upper 80s with heat indices in the lower 90s.
555 AM CDT Sun Oct 15 2017 A cold front was making its way through the forecast area early this morning accompanied by showers and a few thunderstorms and some gusty northwest winds. By this afternoon clouds will begin to clear from west to east as high pressure begins builds into the region. Cooler temperatures behind the front will result in afternoon highs just in the upper 50s to the mid 60s. This high will then be overhead tonight resulting in clear skies and light winds.
500 AM EDT Sun Oct 15 2017 An upper level ridge centered near the Yucatan Peninsula reaches north to the northern Gulf Coast, then spills to the northeast around the nearly stationary upper level low spinning near the Bahamas. The low level ridge centered over the western North Atlantic reaches west into the southeastern United States and straddles the Gulf Coast well into Texas. A broken swath of nocturnal showers stretches southeast from the southeastern Gulf of Mexico, across the Lower Keys, into the Straits of Florida. Height falls today through Monday night across the eastern United States will drive a cold front (currently over the southern Plains) into the Florida Peninsula.
323 AM EDT Sun Oct 15 2017 A weak warm front passes east of the area today followed by a cold frontal passage tonight.
A relatively dry air mass has been filling into the Florida Peninsula along the southern side of this ridge, which should make for a somewhat late start to the convection this afternoon. Despite the increased moisture, weak subsidence on the west side of an upper level low will prevent convection from becoming too widespread, with generally 20-40 percent shower/storm coverage expected. A strong cold front will gradually decelerate across the southeastern U. Strong high pressure will build in behind the front, remaining anchored to the north of the Florida peninsula. This feature and weak low pressure to the south with be the dominant weather features in the long range period.
Temperatures aloft would support even warmer temperatures, but we're into the season where the surface cold pool will take a while to heat up and we're no longer realizing full mixing even on a sunny day. Dropped lows tonight expecting similar conditions, with lows 5-10 degrees warmer than they are this morning.
246 AM CDT Sun Oct 15 2017 Upper Plains trough continues to work its way towards the Great Lakes region, and the cold front is moving its way southeast towards the area. Temperatures will be noticeably cooler Monday, with highs only in the upper 50s to mid 60s. With the current forecast, frost may be a possibility on the Plateau where the high valleys may see a bit more cooling, and with dewpoints in the mid 30s, temps may fall a bit further in these areas and develop some frost.
1225 AM CDT Sun Oct 15 2017 Showers and thunderstorms were currently ongoing across northeastern Kansas and northern Missouri in proximity to the cold front. This activity is expected to move south this evening as the cold front makes its way to the southeast and into the Ozark region late this afternoon into this evening. Some isolated hail to the size of quarters may also be possible with the strongest storms as the freezing level will be fairly low. Cool fall high pressure will be filtering into the region behind the cold front through the day Sunday. With cold high pressure over the region, overnight temperatures will fall into the lower 40s to upper 30s under clear skies. Sprawling high pressure will then linger over the eastern half of the country through the end of the week as upper level flow remains northwesterly.
The upper ridge over the region will weaken and shift southward today as an upper trough moves from the northern plains into the Ohio Valley tonight. An associated cold front will move southeast into the southeastern states by this afternoon and across the area tonight. Increasing deep layer moisture ahead of the front combined with increased forcing as the upper trough and front approach will create scattered to locally numerous showers and thunderstorms mainly this afternoon and early evening. A drier and cooler airmass will begin to move into extreme northern zones early Monday morning in the wake of the cold front.
After 15z, increased forcing in advance of an approaching cold front should result in scattered shower and thunderstorm activity through the afternoon hours.
611 AM EDT Sun Oct 15 2017 A weak warm front passes east of the area today followed by a cold frontal passage tonight.
In response to this, a lee trough has formed and was adequately tight enough to produce 60 mph winds from Livingston to Nye overnight. Building heights and backing flow aloft will lead to a warmer a dry forecast. High temperatures will reach the lower 70s on Monday, which is some 10-15 degrees above normal. A lee trough will form both tonight and again Monday night, and create gusty winds from Livingston to Nye. An upper level Pacific trof is progged into the region to end the work week and bring precip and cooler temps for the weekend. Upper air pattern lends support for lee sfc trof development over the area, resulting in breezy conditions through much of the period.
137 AM MDT Sun Oct 15 2017 Upper trough is moving out of the northern plains, while upper ridge builds over the west coast. Low-amplitude upper ridging will keep weather dry and mild through the week.
246 AM CDT Sun Oct 15 2017 Widespread showers with a few embedded thunderstorms continue behind cold front that has pushed into southeast Oklahoma/northwest Arkansas early this morning.
326 AM CDT Sun Oct 15 2017 Small area of high pressure near Grand Forks at 08z. Calm wind and clear sky over the NE ND into far NW MN has allowed temps to drop into the lower 20s. Upper level northwesterly flow aloft through the first half of the week will allow for a short wave trough to pass through the region Monday. This will likely have weak associated surface features, so the passage of a dry, weak cold front/trough is possible.
A cold front will be approaching from the west today, and broken clouds will precede the front this afternoon, with rain likely moving in around 23-02Z.
Strong to severe wind gusts (40-70 mph) will continue near the cold front and storms southeast of an Altus to Norman to Chandler line through 4 am tonight.
A slow warming trend will start Monday as high pressure strengthens over the Sierra and western Nevada.