Aikyam-Lab/Synoptic-Bench huggingface dataset:
333 PM MDT Thu Apr 13 2017 Some thicker high clouds were streaming across the area from west to east late this morning and early afternoon ahead of an approaching trough and surface cold front that will move through the area this evening. The above mentioned trough will move through Utah and tighten the gradient, resulting in a windy and warm day as sufficient mixing takes place, with some lower valley locations pushing 80 degrees. Winds could gust as high as 40 mph with this cold front and trough passage, staying just below wind advisory thresholds, but this will need to be monitored by the afternoon/evening shifts. Temperatures on Friday will also be a bit cooler but still warm and above normal.
339 PM EDT Thu Apr 13 2017 High pressure will give the region dry weather through Friday night along with mostly sunny skies for Friday.
315 PM EDT Thu Apr 13 2017 A weak cold front will slip south of the areas this evening.
Persistent stratus across the region will result in cooler high temperatures across most of the forecast area. So, have lower highs into the lower 50s across most of the area with some chilly upper 40s across much of Taylor County in north central Wisconsin. Clouds will then be the main forecast problem for the day as moisture/stratus gets trapped under ridge of high pressure/subsidence inversion. Focus then shifts to next incoming mid-level trough pushing northeast out of the Central Plains tonight. Area expected to remain pretty much precipitation-free through midnight but then approach of the trough and nose of 850mb moisture transport/warm air advection expected to produce scattered/elevated showers and perhaps an isolated thunderstorm or two mainly south of I-90 after midnight. For Friday into Friday night, mid level trough will work in conjunction with surface warm front pushing north.
439 PM MDT Thu Apr 13 2017 Some thicker high clouds were streaming across the area from west to east late this morning and early afternoon ahead of an approaching trough and surface cold front that will move through the area this evening. The above mentioned trough will move through Utah and tighten the gradient, resulting in a windy and warm day as sufficient mixing takes place, with some lower valley locations pushing 80 degrees. Winds could gust as high as 40 mph with this cold front and trough passage, staying just below wind advisory thresholds, but this will need to be monitored by the afternoon/evening shifts. Temperatures on Friday will also be a bit cooler but still warm and above normal.
146 PM EDT Thu Apr 13 2017 A weak cold front will dissipate across South Carolina today. High pressure will spread across the Carolinas and Georgia through this weekend.
High pressure is building in at the surface from the north for tonight and Friday as ridging aloft builds over the northern Gulf and slides east to over the state. Temperatures will be above normal through the period with highs in the lower to mid 80s and lows in the mid 50s to mid 60s. Relaxed ridging aloft resides in place as a couple of weak short wave troughs move over the Gulf coastal region. The upper ridge provides a stable warm and generally dry air mass. High pressure in place across the region will keep generally E/NE flow across the waters through the period. The tight pressure gradient currently in place will weaken over the weekend as the high pressure center settles south over the west Atlantic.
High pressure will be stacked over the region through the day, resulting in sunshine mixed with patches of thin cirrus clouds. Temperatures will be warm, with highs in the low to mid 80s. Humidity levels will be very low, with lowest afternoon RH values dipping into the lower 20s. High pressure will be centered over Mid Tn.
305 PM CDT Thu Apr 13 2017 Upper level ridging, perfectly placed along the Gulf coast states, will keep the primary storm track far enough to our north in the short term to keep central Alabama dry.
An upper level ridge of high pressure over the Mid South today will keep dry and unseasonably warm weather in place. High temperatures will reach the lower to middle 80s under partly to mostly sunny skies.
But overall, this will do little to affect high temperatures this afternoon with highs reaching the lower to mid 80s. Warming trend underway as stg upper ridge over se TX drifts over area and moves east to AL area by Friday eve. Highs into the lower to mid 80s for much of area from today into the wknd. Deepening southerly flow around backside of upper ridge may induce an increased sea breeze activity beginning Sat aftn.
This would cause a SE-moving cold front that has entered Southeast Nebraska & Northwest KS to stall. With the N/S-oriented lower- deck trof axis remaining across the Western Plains, increasing moisture would be afforded extra time to continue spreading north across KS. A 3rd and somewhat stronger mid-upper trof rounding the base of a mid-upper cyclone drifting east across Southern Canada should be strong enough to force a SE- moving cold front into Central KS Sat Afternoon then into Southeast KS late Sat Night. However, this 3rd upper-deck wave will begin to shear as it encounters a STRONG mid-upper high centered over Southeastern U. As such this cold front would also decelerate & eventually stall as it crosses the KS/OK border on Sun.
The weak upper wave, and warm frontal interaction will exit the region Friday evening in the north and east, leaving south winds, warm advection and dry conditions in its wake.
Our area is situated on the southern end of a low level ridge of high pressure and the northern side of an upper level ridge. With stacked high pressure over the area, expect fair conditions with sunny skies and warm temperatures.
AN upper level trough will keep a threat of showers today and Friday across SW Washington and NW Oregon. THe showers will be most noticeable over the higher terrain. High pressure will end showers Friday night and support dry weather for the weekend.
311 PM EDT Thu Apr 13 2017 High pressure will continue to build over the area tonight through Friday and will shift offshore south of New England Friday night.
Other than some high clouds, could see possible MVFR/IFR ceiling and/or fog development toward morning, but confidence on this happening is on the low side. Convective temperatures should be reached by early afternoon with max temperatures rising into the low 80s across SE TX. Carrying low PoPs in the western zones to account for this shower development, although forecast soundings indicate drier air filtering into the low-mid levels late this afternoon. High pressure will continue to build in from the east, bringing drier air into the region.
This is the result of rather strong ridging influences sfc and especially aloft expected thru the day on Sat. Expect a little bit more moisture across the region Fri night into Sat, although not expecting any organized pcpn chances, this should temps rather mild in the lower 60s, upper 50s Cumberland Plateau Region Fri night, with highs on Sat just slightly cooler, mainly spanning the low to mid 80s, upper 70s Cumberland Plateau Region. This front will meander across the mid state region through Tue, before pushing NEWD as a warm front as the second half of the work week progresses. High pressure will be centered over Mid Tn.
313 PM EDT Thu Apr 13 2017 A warm front will linger across the region tonight into Friday before lifting north Friday night.
1219 PM CDT Thu Apr 13 2017 /18Z TAFS/ Convection continues to weaken across the area early this afternoon ahead of the upper level trough axis. This activity is in association with a short wave trough that is moving across West Texas. Precipitation will affect areas generally east of a Haskell, Abilene to Sonora line this morning, with some redevelopment along the trough axis primarily east of a Haskell, Abilene to Junction line this afternoon.
Issued by National Weather Service MOUNT HOLLY NJ 359 PM EDT Thu Apr 13 2017 High pressure extending from the Grtlks south across the mid- Atlantic region this afternoon will shift eastward and offshore by Friday night.
Issued by National Weather Service KEY WEST FL 400 PM EDT Thu Apr 13 2017 High pressure will be building from the Ohio Valley into the western Atlantic through the upcoming weekend, maintaining an easterly lower tropospheric flow across south Florida.
A strong cold front will sweep across northern Utah early this evening.
355 PM EDT Thu Apr 13 2017 High pressure centered over the Lower Great Lakes will bring dry and cooler conditions that will last through Friday. High pressure at the surface is keeping us dry while convective debris from old upstream activity has resulted in a shield of mid/high clouds streaming overhead. Variably cloudy skies will continue into the overnight but we will stay dry as high pressure slips off to the east. Low temps tonight will range from around freezing over the NE zones to the lower 40s along the MD border. It appears the strength of the upper ridge over the South Central/Southeast U.
136 PM EDT Thu Apr 13 2017 High pressure will move in today and remain into Friday night with dry weather.
Snowfall will continue to intensify this afternoon as an upper level trough and mid level circulation move through western Montana and central Idaho.
112 PM EST Sat Dec 24 2016 High pressure off the Mid-Atlantic Coast continues moving further into the Atlantic Basin with a weak front stalled just north of the area. The front will weaken tonight allowing a ridge of high pressure to spread across the region from the north on Christmas Day.
All eyes are on a deep trough along with west coast with upper level ridging over the central conus.
A warm pattern will remain in place tonight with upper level ridging centered off the Florida east coast.
Satellite showing a large upper level low pressure system spinning over northern and central Nevada. For Sunday, the upper level low will move east but the flow will remain out of the north. Highs are forecast to make it into the mid 20s to maybe the low 30s.
Wedge of high pressure nosing down the Appalachians will diminish as center of the parent high moves eastward over the Atlantic. Even with the movement of the ridge axis, expect high pressure to dominate the region through the short term, preventing an approaching cold front from pushing into north Georgia today. Instead, band of enhanced moisture associated with the front will rotate around the periphery of the ridge, keeping best rain chances over Tennessee. Temperatures through the short term continue to be warmer than normal, with highs in the upper 60s and 70s today, and a few degrees warmer on Christmas Day.
So highs were lowered into the low- mid 40s for most locations this aftn. Temperatures will increase as this warm moist air streams northward, and so while there could be a brief period of freezing rain/drizzle in portions of central Nebraska, the majority of the area will have temperatures above freezing as precipitation begins. The upper low moves out of the Rockies and moves to the northeast into the northern plains during the day on Sunday. By afternoon, the upper low is moving to the north enough that the precipitation should start to pull out of the area. The cold front moves through the forecast area during the day on Sunday and by Sunday night, the cold air starts to move into the area.
Low clouds and fog blanket central Illinois early this morning as a mild/moist airmass continues to flow northward into the area ahead of an advancing trough of low pressure. to the lower to middle 40s elsewhere. In the meantime, light easterly flow north of an approaching warm front will ensure another cloudy and foggy night. Warm front will lift into central Illinois on Sunday, bringing scattered rain showers through at least the first half of the day. to the lower to middle 50s across the remainder of the region.
215 PM EST Sat Dec 24 2016 A warm front will lift northward through much of southern and eastern NC today, as a cold front sags south into the northern Piedmont. This cold front will then push southward through all the region overnight.
Weak high pressure across Indiana will move on to the east. Strong low pressure will move into the northern plains and pull a warm front north across our area Sunday night.
313 PM EST Sat Dec 24 2016 Current air temperatures in Florida Keys island communities are in the lower 80s, following overnight low temperatures in the mid 70s. A strong, deep layer mean anticyclone dominates the atmosphere across the Florida Peninsula, Keys, and indeed most of the Gulf basin today, as has been the case for the last week.
Deep layer ridging 1-2 standard deviations above normal, with warm temperatures aloft will result in afternoon highs near 80 degrees across the Tri-State region.
111 PM EST Sat Dec 24 2016 High pressure off the Mid-Atlantic Coast continues moving further into the Atlantic Basin with a weak front stalled just north of the area. The front will weaken tonight allowing a ridge of high pressure to spread across the region from the north on Christmas Day.
1013 AM MST Sat Dec 24 2016 Current surface analysis shows Canadian cold front sliding slowly south across far northeast WY and SD. Upper level analysis shows weak ridge to the east of the area, with storm system to affect us Christmas Day now along the Pacific coast.
Tonight-Christmas Night: A deep and very sharp upper-deck trough that is situated along the West Coast will take on a negative tilt as it lifts northeast over the Great Basin and Southern Rockies tonight and early Christmas Morning. As the negatively-tilted trough crosses AZ and NM late tonight the lower-deck moisture surge would increase in response to intense surface cyclogenesis occurring across Eastern CO. However, on Christmas Day, The strong, negatively- tilted trough will undergo intense cyclogenesis as it continues to lift northeast from the Western Plains to the Nebraska/SD border. With an equally intense surface cyclone, the lower-deck southwest flow will increase considerably to enable richer moisture to surge further into the Central Plains. As the vicious cyclone crosses the Nebraska/SD border Christmas afternoon, a cold front will surge east/southeast into KS.
A concern for the James river valley is the significant warming aloft leading to mixed sleet and freezing rain chances that are increasing in likelihood. Each model run has been showing the warm layer even warmer and a bit thicker.
The low level easterly flow will continue to spread moisture westward from the Atlantic, but this remained trapped under the subsidence inversion.
Highs will range from near 60 across extreme southeastern Kansas and far southwestern Missouri to the lower 50s across central Missouri this afternoon. Tonight into early Sunday morning the low level jet will increase and warm air advection will develop across the region.
The potential for freezing drizzle late tonight into Sunday morning is very small across southern WI. Temperatures will be just below freezing, so a short period of freezing drizzle is possible. Much deeper moisture and stronger forcing arrive Sunday afternoon ahead of deep low pressure over the Plains. Temps will be rising through the day, reaching highs in the lower 40s around midnight.
335 PM CST Sat Dec 24 2016 Tonight and Sunday, the ridge kept the front at bay with only a small section of the cwa getting any rain this afternoon. May be in the lower to mid 60s for much of the area if the clouds return sooner.
Today should be fairly quiet weatherwise as upper level ridging continues from the northern Plains to the lower Mississippi Valley. A very strong upper level trough over the West Coast this morning will move eastward during the day. As the upper trough approaches the central High Plains later tonight, chances for showers and a few thunderstorms will begin to ramp up across central and southwest Kansas. The upper trough develops into a closed low as it moves from Colorado into the northern Plains on Sunday.
Areas along and north of I-90 are still below freezing at that point, and could see a little bit of freezing rain prior to the dynamic warming from south to north resulting in temperatures warming above freezing. Have continued freezing rain advisory through the morning. Once the cold front comes through, could see a little bit of snow develop Sunday night across central South Dakota but amounts should be very minor.
327 PM CST Sat Dec 24 2016 Cold front appears to be located directly across the mid state basically bisecting the cwa from sw to ne. The boundary will become stationary and then drift northward as a warm front. Otw, forcing may increase a touch across the north as the warm front begins to lift out. We may see some partial sunshine in the afternoon as the mercury reaches into the lower 70s.
1150 AM EST Sat Dec 24 2016 A cold front will move across the area this morning, followed by high pressure briefly building in this afternoon and tonight. As the high moves off the the east, a warm front will lift north and cross the entire area Sunday night.
Short range models remain consistent in ejecting closed upper cyclone into the central Plains Christmas day. 00Z ECMWF has backed off its previous solution of phasing the upper low off the Baja coast with the northern stream.
With warm moist onshore flow over relatively cooler (60F +/- a couple of degrees) water off the Mississippi and Alabama Gulf coast, guidance, mesoscale and statistical, are advertising dense fog forming over the Mississippi and Alabama coastal counties and nearby Gulf waters this evening and spreading inland and then east through the overnight hours. With southwest portions of the area expected to see the fog/stratus, have kept temps a bit cooler versus guidance there. Still, any which way one looks at it, with an upper high centered off the Florida Atlantic coast bringing strong subsidence to the fa, highs for Christmas are expected to range from the low 70s southwest to upper 70s northeast, a good 15 degrees plus above seasonal levels for this time of the year.
Slight chance of freezing drizzle and drizzle are forecast after 2 am toward central WI.
Enough warm air works into that area for a high chance of mixed sleet, freezing rain, and maybe a bit of rain. Patchy fog developed early this morning behind a cold front.
356 PM CST Sat Dec 24 2016 Texarkana is holding the warm front at bay, but it has crossed I-30 at Mount Pleasant.
322 PM CST Sat Dec 24 2016 (Tonight and Christmas Day) An unsettled pattern will continue during the next 24 hours as a well developed upper level trough over the western U.
However, as the mid-upper level ridge off the eastern FL coast becomes more amplified, the low level flow backs to the SW tonight.
A warm front currently extends across extreme northern Arkansas into southeast Missouri at this time. Temperatures will remain on the mild side with lows Christmas morning in the low to mid 50s. On Christmas Day, low pressure will move out of the central Rockies and into South Dakota with a cold front extending south into the central and southern plains. On Sunday night, the cold front will start to move into western Arkansas with more showers and thunderstorms expected ahead of the front.
An upper level ridge is well established across the Florida peninsula. While most of the moisture will be mainly trapped in the lower levels, PWAT's through this period will be around 1 to about 1.
We should see the return of MVFR/IFR CIGS tonight in to early Sun morning as the low-level flow remains off the Gulf. A slight uptick in wind speeds overnight/tomorrow (with the gradient tightening in response to an upper trof moving ENE into the north- ern Plains) should give us more issues with low clouds versus fog.
The 12Z MFL sounding shows shallow moisture in the lower levels with dry air aloft. High pressure continues to hold over the region which is providing an easterly flow of warm, moist Atlantic air over southern Florida. As the holiday weekend draws to a close, the focus moves towards the central part of the country as successive frontal systems push through this week with little impact to Florida thanks to the high pressure over the region.
The NAM and its subsequent ensemble members remain in their own camp concerning how to handle temperatures with this system, substantially cooler and thus keeping us under freezing rain conditions through the entirety of Sunday. The GFS/EC/Canadian continue to show a much warmer 925mb airmass, with readings between +2 and +8C. Will stick with forecast continuity on this one, and continue to advertise morning freezing drizzle/rain with a thaw during the day, though the degree to which will vary widely across the CWA, and some areas may not thaw out that much before temperatures collapse with the passage of the cold front. Added wording for re-freezing in the warnings/advisories.
1253 PM EST Sat Dec 24 2016 A weakening cold front will cross the area this morning. High pressure will build across eastern Canada and New England on Christmas day. Strong low pressure will track across the northern plains states Sunday.
The front to our north has stalled, and is now moving northward as a warm front. Mid to upper 70s, with a few 80 degree readings can be expected across all of Central Alabama as the upper ridge strengthens just off the Florida Peninsula.
304 PM CST Sat Dec 24 2016 A warm front, currently located just south of the Red River, continues to make steady northward progress, something that will continue overnight. The main question for tomorrow's weather remains the amount of instability that will develop across the region during the afternoon and evening hours, in advance of an approaching cold front.
1252 PM EST Sat Dec 24 2016 A cold front will move across the area this morning, followed by high pressure briefly building in this afternoon and tonight. As the high moves off the the east, a warm front will lift north and cross the entire area Sunday night.
324 PM EST Sat Dec 24 2016 High pressure will build over the region tonight and Christmas Day.
A large upper trough developing across the West will transition mid level flow to the southwest over our region today. The upper trough will become negatively tilted and lift into the Plains during the day Sunday. While there will be a 50 kt LLJ out ahead of the system, strong winds will also spread east behind a Pacific cold front Sunday morning.
The low pressure trough is digging a little more southward as it crosses the inter mountain area. Have updated forecast for the warmer temperatures in the Lower Snake Plain, along with more rain/snow mix.
A strong upper trough will approach late in the day which will start the pull of moisture heading our way. Pattern suggests that wind speeds will trend higher, leaned towards the higher MOS speeds as a qualifier. Temperatures will be cooler than we will see today, a Pacific airmass will drop temps with quite the sway.
An upper level trough will be moving out of the Four Corners region tonight, emerging into the Plains on Sunday. A cold front will be moving southward during the short term, but should stall north of South Texas. Highs will generally be in the low 80s for inland locations and upper 70s across the immediate coast.
Water vapor imagery and upper air analysis from 12Z show an upper level trough digging just off the California coast with ridging aloft through the Plains. A weak short wave trough was also pushing through the Arklatex and is only enhancing shower activity along the frontal boundary through central Arkansas. The upper level trough should drop a little farther south tonight before moving across the Rockies and into the Plains tomorrow. Upper level trough should move into the Plains with a negative tilt and supporting lee cyclongenesis at the surface.
352 PM EST Sat Dec 24 2016 A warm front will lift northward through much of southern and eastern NC today, as a cold front sags south into the northern Piedmont. This cold front will then push southward through all the region overnight.