Aikyam-Lab/Synoptic-Bench huggingface dataset:
540 AM CST Fri Nov 18 2016 Strong cold front was situated just east of the Kansas turnpike at 07z and will exit southeast Kansas before dawn.
Models continue to show the cold front in our far western counties at 18z today, moving into our eastern counties by 00z Saturday, and well east of the PAH forecast area by 06z Saturday.
313 AM MST Fri Nov 18 2016 10z surface analysis shows the center of the low pressure system currently over southwestern Iowa with high pressure centered over Alberta/Saskatchewan extending southward into Montana and Wyoming. A tight surface pressure gradient exists around the low pressure center creating breezy to windy conditions over western South Dakota with slightly greater wind speeds closer to the low over central and eastern South Dakota. The winds will gradually diminish through the day today as the low pressure center continues to move away from the forecast area and high pressure builds in from the west. Cold temperatures, mainly in the single digits and teens above zero, are expected tonight due to good radiational cooling with fresh snow and light winds as the high pressure center slides across the forecast area.
In addition, given the low dew point depressions, decided to include a mention of patchy freezing fog. As an upper ridge axis slides across the area tonight expect increasing clouds once again into the weekend, but with the associated height rises temperatures are expected to climb back toward seasonable levels.
600 AM CST Fri Nov 18 2016 Scattered to broken clouds streaming up ahead of lowering central Texas surface pressure associated with an approaching cold front. or the pre-frontal trough. The forecast timing of the cold frontal passage at CLL will be between Noon and 2 PM. /ISSUED 415 AM CST Fri Nov 18 2016/ The cold front is still on track to move through Southeast Texas today with showers and thunderstorms developing along and ahead of the boundary.
753 AM CST Fri Nov 18 2016 For the 18/12Z terminals expecting most locations to become MVFR/IFR as a cold front moves across the region providing showers and isolated thunderstorms, with a band of showers and thunderstorms near the frontal boundary. /issued 426 AM CST Fri Nov 18 2016/ A line of convection is rapidly developing along a pre-frontal trough just west and northwest of the CWA. An upper trough ejecting towards the Upper Mississippi Valley will help drive the front and the associated convection across the CWA today. Below freezing temperatures will be possible across Southeast Oklahoma tonight/Saturday morning.
747 AM EST Fri Nov 18 2016 Warm and dry conditions will continue through today before a cold front approaches early Saturday. Continue mild tonight ahead of an approaching cold front. A strong cold front will cross the area Saturday, bringing gusty rain showers that will transition to snow as temperatures fall sharply behind. Will carry categorical PoPs along the front, as strong forcing will exist along ahead of the negatively-tilted mid-level trough. As with the previous forecast, will hold off any accumulation until after sunset Saturday night, when the dendritic growth zone begins it's overlap with the top of the low-level moisture.
655 AM EST Fri Nov 18 2016 Warm and dry high pressure will hold over the region through tonight.
431 AM MST Fri Nov 18 2016 A mix of patchy valley freezing fog and very cold temperatures will be present across the Northern Rockies through this morning. The freezing fog may deposit a thin layer of black ice on area roadways and create hazardous travel conditions. Temperatures will rebound a bit this afternoon, however valley temperature inversions are likely to develop as high pressure moves over the region. High pressure over the Northern Rockies will slowly erode throughout this weekend, with Pacific moisture increasing over time in southwesterly flow aloft.
558 AM CST Fri Nov 18 2016 Behind a recent cold frontal passage, gusty northwest wind will persist most of today and begin to decrease after dark. /issued 338 AM CST Fri Nov 18 2016/ The cooler airmass is moving into Oklahoma this morning.
415 AM CST Fri Nov 18 2016 Second and strongest of two cold fronts was dividing our CWA from west to east at 3 AM ahead of a decent uptick in dewpoints on stiff north winds at times. Earlier front that cleared Stonewall County by midnight was focusing a line of storms east of Abilene all within the base of an upper trough - the same trough also responsible for a blizzard in eastern SD.
/issued 415 AM CST Fri Nov 18 2016/ Second and strongest of two cold fronts was dividing our CWA from west to east at 3 AM ahead of a decent uptick in dewpoints on stiff north winds at times. Earlier front that cleared Stonewall County by midnight was focusing a line of storms east of Abilene all within the base of an upper trough - the same trough also responsible for a blizzard in eastern SD.
/issued 358 AM CST Fri Nov 18 2016/ An upper level trough is over the central part of the country with a cold front moving into the area. Temperatures are expected to reach the freezing point across northern Lea County this morning so a Freeze Warning is in effect. These conditions will allow for temperatures tonight to cool to freezing or below across many locations in the CWA. An upper ridge will begin building over the region Saturday.
The big weather maker for today will be a large trough that is expected to push a cold front through the area tonight. So only sight chance of rain tonight, but the bigger impact will come this weekend with much cooler temperatures. 13/MH Behind the front on Saturday expect much cooler temperatures and strong gusty winds.
A cold morning for much of Central California as surface temperatures reach the freezing mark. The desert has a higher potential of reaching the freezing mark this morning. With temperatures reaching the freezing mark and dew points in the upper 20s to lower 30s across the San Joaquin Valley, the potential for fog development will remain low. The fetch of higher moisture values will shift east with the cold front that is expected to hit California late Saturday.
415 AM CST Fri Nov 18 2016 The cold front is still on track to move through Southeast Texas today with showers and thunderstorms developing along and ahead of the boundary.
Strong upper trough was observed deepening northeast over the northern plains this morning. The cold front has just passed through Emporia where temps quickly fell by 10 to 15 degrees within the previous hour. Underneath the overcast skies, highs do not deviate much in the lower 40s. Lows are coldest towards the Nebraska border in the lower 20s with middle to upper 20s seen elsewhere.
The axis of a surface and upper ridge will move east of our area today, allowing warm south winds to increase. A cold front will move into our western counties this evening, and will cross the entire Mid State by daybreak Saturday. By daybreak, a much cooler air mass will be invading the area. Saturday will be much cooler and very breezy.
Chattanooga Airport, TN 78 49 57 33 / 0 40 20 0 Knoxville McGhee Tyson Airport, TN 75 45 53 28 / 0 30 20 10 Oak Ridge, TN 76 48 55 29 / 0 40 20 10 Tri Cities Airport, TN 75 44 51 26 / 0 10 50 10.
Temperatures have recovered to the mid 70s with dewpoints in the lower 60s, resulting in low humidity values for our standards. The shallower waters remain beneath Advisory criteria due to their cooler water and the stabilizing effect it has on near surface wind speeds.
1004 AM EST Fri Nov 18 2016 Warm and dry conditions will continue through today before a cold front approaches early Saturday. Expect mild conditions tonight ahead of an approaching cold front. A strong cold front will cross the area Saturday, bringing gusty rain showers that will transition to snow as temperatures fall sharply behind. Will carry categorical PoPs along the front, as strong forcing will exist along ahead of the negatively-tilted mid-level trough. As with the previous forecast, will hold off any accumulation until after sunset Saturday night, when the dendritic growth zone begins it's overlap with the top of the low-level moisture.
A cold front will push through the area mid to late afternoon, and showers and thunderstorms ahead of the front could produce strong, variable and gusty winds and possible lower, mvfr, ceilings/visibility. any mvfr Conditions will improve to vfr Saturday as drier air arrives and high pressure spreads across the area. /issued 325 AM CST Fri Nov 18 2016/ SHORT TERM (Today through Saturday): The main feature in the short term will be a cold front now pushing into and across the Texas panhandle and Northwest Texas in general. The front will push offshore late in the evening as strong high pressure builds into the area. a few low clouds will linger over the lower valley Friday night, but conditions will otherwise clear fairly quickly after the front pushes through.
A strong cold front will push east into the Mid-South this afternoon and this evening. Much cooler air will filter in on gusty northwest winds and temps will drop to the upper 30s and lower 40s by Saturday morning. Cool high pressure will build into the area with some chilly days and nights.
426 AM CST Fri Nov 18 2016 A line of convection is rapidly developing along a pre-frontal trough just west and northwest of the CWA. An upper trough ejecting towards the Upper Mississippi Valley will help drive the front and the associated convection across the CWA today. Below freezing temperatures will be possible across Southeast Oklahoma tonight/Saturday morning.
Drier air has moved into the state this morning as a strong upper level ridge builds in from the Great Basin. Another chilly night is expected tonight as high pressure, light winds, dry air and fresh snow cover produce an optimal radiational cooling situation. Much of the plains will fall to the lower and mid teens overnight. An upper level ridge will be over the area through the weekend with dry conditions.
Stacked high pressure just north of the area will slowly move east today with light to calm winds becoming light east to southeast.
728 AM EST Fri Nov 18 2016 High pressure will crest over the region today and will gradually shift east on Saturday.
600 AM EST Fri Nov 18 2016 Strengthening low pressure will track north of Pennsylvania Saturday, pushing a strong cold front through the state.
1010 AM EST Fri Nov 18 2016 High pressure will crest over the region today and will gradually shift east on Saturday.
So the day will start a little warmer, by about 5F degrees. By afternoon, an upper ridge moves across Montana to begin a slow warming trend for the next few days. In addition, given the low dew point depressions, decided to include a mention of patchy freezing fog. As an upper ridge axis slides across the area tonight expect increasing clouds once again into the weekend, but with the associated height rises temperatures are expected to climb back toward seasonable levels.
1010 PM EST Fri Feb 17 2017 A weak warm front lifts north today. A ridge of high pressure extends from the sfc up to H500, will maintain dry weather conditions through the period.
Models prog the high wind potential decreasing during the evening. Models prog the upper low pushing onshore tonight and over the SJV early Saturday morning.
This low-level moist flow will likely result in overcast skies, patches of drizzle, and some fog early Saturday over most of central and southern Oklahoma, and north Texas.
Farther west, the challenge concerns the arrival of periodic mid and high clouds as a dirty ridge exits NM.
622 PM EST Fri Feb 17 2017 A weak warm front lifts north today. A ridge of high pressure extends from the sfc up to H500, will maintain dry weather conditions through the period.
435 PM CST Fri Feb 17 2017 Fairly tranquil weather with above normal temperatures will continue through Saturday over the fcst area as upper level ridging prevails in advance of the next upper level low pressure system slated for late this weekend.
However, some of this could build down and dense fog develop as the low stratus develops. /CME/ An upper level ridge will begin to build over the region on Saturday night as high pressure builds at the surface.
Satl imagery indc that the upper low in Northeast Texas continues to move northeast. As the low continues to pull away the winds will diminish rapidly after sunset. This will bring warmer temps and dry conditions.
901 PM EST Fri Feb 17 2017 High pressure will linger over the area through Saturday.
622 PM EST Fri Feb 17 2017 As high pressure moves off the east coast, a southwest flow of much milder air will develop by Saturday.
Well amplified upper level ridge centered over the eastern Plains will continue to bring very warm conditions to the region.
748 PM EST Fri Feb 17 2017 A warm front lifts into the northeast tonight followed by a cold front on Saturday afternoon.
424 PM MST Fri Feb 17 2017 Current surface map places trof across the eastern Dakotas.
However, mid level flow will back to the southwest over western Montana low pressure dominates the west coast.
424 PM MST Fri Feb 17 2017 The afternoon water vapor loop showed upper lows over the southern Great Plains and off the CA coast. The eastern Pacific trough will amplify further as it slowly moves inland through Saturday. The higher mountains may receive a couple inches of snow.
Warm and dry day across the mid state as abundant sunshine, the upper level ridge, and some low level mixing helped the temps rise and dewpoints fall.
Surface map this afternoon shows a ridge of high pressure moving across Middle Tennessee, with winds in the process of turning southward. An upper low currently situated along the TX/OK border with a trough extending into the Gulf of Mexico will move northeastward during the next several hours and drag a large swath of moisture through the mid state.
The satellite pictures are showing associated cloudiness with the next upper level trough just getting into western Colorado at this time.
1025 PM EST Fri Feb 17 2017 High pressure moves through the area tonight, with a warm front moving across the northeast by Saturday morning as the high moves east.
850 PM CST Fri Feb 17 2017 IR and Water Vapor Imagery showing our upper low spinning across the Middle Red River Valley of Southern Oklahoma into Northeast Texas. As the lower levels of the atmosphere become saturated mist/BR will develop reducing the visibility to 3-5 statute miles along with possible light rain or drizzle.
A Pacific low pressure system will bring cooler temperatures, breezy winds, and periods of rain and high elevation snow to northern Arizona through the weekend. Current radar and satellite imagery reveals a closed low currently centered just off the West Coast near San Francisco.
953 PM EST Fri Feb 17 2017 High pressure will build across the area through tonight into early Saturday. A wave of low pressure will pass offshore late Saturday and Saturday night.
402 PM CST Fri Feb 17 2017 An upper trough continues to move east northeast from Texas and into Oklahoma this afternoon. Large scale ascent ahead of the trough has resulted in the development of a large area of convection in the Northwest Gulf of Mexico. Rain chances should diminish from south to north on Saturday as the upper trough lifts northeast away from the region, but a few lingering showers or patchy drizzle will remain possible across Southeast Oklahoma and Southwest Arkansas through Saturday afternoon.
Upper ridging and strengthening onshore winds should translate to near 80 high temperatures tomorrow and Sun. That being said, progs of very high PWS when combined with the deep/strong southerly inflow and the forecasted track of the upper low itself are supportive of heavy rains devel- oping/moving across SE TX late Sun through late Mon afternoon. Exten- ded models hinting at a cold front for next Fri (or thereabouts).
517 PM CST Fri Feb 17 2017 Extremely mild conditions for this time of year, with highs 25 to 30 degrees above normal, and lows several degrees warmer than normal highs, will continue through the weekend.
) Lower PW values Saturday will contribute to warmer afternoon temperatures.
611 PM EST Fri Feb 17 2017 Aviation A warm front will move north through Lower Michigan tonight and set the stage for a few days of mild weather.
A strong Pacific storm system will bring valley rain, mountain snow and cooler temperatures this weekend.
910 PM EST Fri Feb 17 2017 A warm front will lift NE across the area tonight ushering in spring like conditions. Warm front over the SW part of the forecast area will move NE across the area the rest of the night. A weak but dry cold front will push south across the forecast area Saturday. as a strong upper level ridge builds over the Eastern CONUS.
Low temperatures will be more mild, mostly in the lower-mid 50s, but some normal colder spots will fall into the upper 40s. Thin cirrus will occur through evening then increase as a ridge aloft retreats eastward. High pressure ridge moving seaward will bring a southerly wind flow overnight and Saturday.
1045 PM EST Fri Feb 17 2017 An upper level trough will approach from the west and cross the southeastern U. Areas that are more sheltered in the river valleys (Sanford, Smithfield, Albemarle to name a few locations) were in the lower to mid 40s. Forecast soundings depict relatively little moisture with this feature, focused primarily in the mid to upper levels, with weak low level moisture transport, and steady MSLP with ridging extending across the Southeast and a weak lee trough over the Piedmont. Also, the initially-decent DPVA weakens as this low/trough approaches and dampens, contributing to reduced forcing for ascent as we head through Sat night.
509 PM CST Fri Feb 17 2017 General surface ridging over the southeastern portion of the country.
A strong area of low pressure moving across the area tonight and Saturday will produce significant valley rain and mountain snow.
Adjusted current temperatures in line with latest observations where southern third of the area was a bit warmer than forecast as clouds are already moving into that area. Chattanooga Airport, TN 44 62 46 70 / 10 60 10 0 Knoxville McGhee Tyson Airport, TN 41 60 46 66 / 0 40 40 0 Oak Ridge, TN 41 60 47 67 / 0 40 40 0 Tri Cities Airport, TN 36 59 44 65 / 0 40 50 10.
A benign start to the period, with an upper ridge crossing the Ohio Valley, will transition to some rain chances tomorrow. This transition comes as an upper low, currently centered along the TX/OK Red River border, moves into the Commonwealth Saturday afternoon. Continued southerly winds ahead of this feature, along with increasing cloud cover, will mean a warmer night tonight. Rain chances will linger into the evening hours before that upper low shifts eastward into the Appalachians.
As the lower levels of the atmosphere become saturated mist/BR will develop reducing the visibility to 3-5 statute miles along with possible light rain or drizzle. /issued 402 PM CST Fri Feb 17 2017/ An upper trough continues to move east northeast from Texas and into Oklahoma this afternoon. Large scale ascent ahead of the trough has resulted in the development of a large area of convection in the Northwest Gulf of Mexico. Rain chances should diminish from south to north on Saturday as the upper trough lifts northeast away from the region, but a few lingering showers or patchy drizzle will remain possible across Southeast Oklahoma and Southwest Arkansas through Saturday afternoon.
707 PM EST Fri Feb 17 2017 High pressure will build across the area through tonight into early Saturday. A wave of low pressure will pass offshore late Saturday and Saturday night.
Surface wise, a narrow ridge axis lies across our region, with an elongated, north-south trough in the extreme western Gulf of Mexico. A deep layered anticyclone aligned over the Florida peninsula will shift into the southwest Atlantic Ocean by morning when weak upglide below 850 begins.
605 PM EST Fri Feb 17 2017 A warm front will lift NE across the area tonight ushering in spring like conditions. Warm front over the SW part of the forecast area will move NE across the area overnight. A weak but dry cold front will push south across the forecast area Saturday. as a strong upper level ridge builds over the Eastern CONUS.
658 PM CST Fri Feb 17 2017 Water vapor loop indicated an upper level trough over the Red River Valley and extended into MAN. Thermal ridge axis will shift east ahead of weak frontal passage this evening associated with short wave. A bit cooler column tomorrow however with shrinking snow pack, surface westerly flow and expected solar temperatures will still range well above normal although record highs may not be in the works.
638 PM EST Fri Feb 17 2017 A warm front will lift NE across the area tonight ushering in spring like conditions. Warm front over the SW part of the forecast area will move NE across the area overnight. A weak but dry cold front will push south across the forecast area Saturday. as a strong upper level ridge builds over the Eastern CONUS.
320 PM MST Fri Feb 17 2017 Another mild afternoon over southern Colorado as upper level ridge hangs on for one more day across the Rockies. Still waiting for first piece of the deep western trough to reach the Continental Divide, with radar and obs suggesting most precip this afternoon still fairly far west over Utah/nrn Arizona. Overnight, mid level flow gradually becomes more swly across the region as upper low pushes onshore across California. On Sat, low and mid level S-SW flow increases as upper low pushes into wrn AZ by late afternoon. Slight increase in 700 mb temps looks to be offset by increased cloud cover, leading to max temps near or just slightly cooler than Fri maxes.
While rain amounts with these showers are not particularly significant from a hydrologic standpoint, they are enough to keep the low elevations wet and the high elevations snowy in most locations. Thus, the High Surf Warning is in effect through this afternoon for beaches along the NW California coast.
High pressure holds grip for one more day giving us mostly sunny skies and warm temperatures through the day. Expect dangerous squall line to move through the E Gulf waters Sunday ahead of cold front.
A WARM FRONT WILL EXTEND THROUGH THE FORECAST AREA TODAY AND TONIGHT AHEAD OF STRONG LOW PRESSURE.
Expecting to see a quick 1 to 3 inches with up to 4 along the higher terrain between DeBeque and Rifle. Models indicated broad ascent responsible for snow was provided by combined jet divergence, a passing 7H trough, steep lapse rates and favorable south to southwest orographic lift.
Several weak upper lows meandering through the Northern Plains over the next 24 hours will result in little to no ventilation through the atmospheric column. This allows shallow cool air to create favorable conditions for fog and the lack of seeder/feeder ice crystals will support drizzle/freezing drizzle. patchy freezing drizzle will be common across the much of the central and eastern sections. Expect little change in temperature today and tonight beneath the low clouds and fog. Sunday will see a slow end to the thermal profiles supporting the fog and drizzle/freezing drizzle as the flow aloft becomes more westerly with the upper lows exit.
558 AM EST Sat Jan 21 2017 High pressure will move east of the area today. A weak cold front will cross the region tonight.
Models indicated broad ascent responsible for snow was provided by combined jet divergence, a passing 7H trough, steep lapse rates and favorable south to southwest orographic lift.
328 AM MST Sat Jan 21 2017 Areas of freezing fog have developed across northwest and west- central Montana valleys this morning, though high clouds over the area will restrict how widespread the fog will become. A low pressure system off the coast will bring the first wave of light snowfall across the area throughout the day today, beginning in north-central Idaho and spreading into western Montana. A brief break in activity overnight may lead to the redevelopment of freezing fog, though confidence is lower due to less snow melt/more cloud cover expected today.