Aikyam-Lab/Synoptic-Bench huggingface dataset:
Surface winds are already increasing owing to a tightening pressure gradient ahead of tomorrow night's cold front.
Lows tonight will range from the low to mid 30s for most locations.
At the surface, high pressure will be in place with southerly flow over the region. The main weather maker will be a weak cold front traversing the region late on Wednesday. Temperatures will moderate, with highs in the low to mid 70s on Tuesday rising to the mid and upper 70s on Wednesday, while lows range from the upper 40s to upper 50s.
High pressure will build in behind this system, allowing for a brief respite in the wet pattern. A large upper level trough across the western CONUS will move across the Central U.
Precipitation chances will be advancing through the period as a cold front sweeps through. S/SE winds will increase on Tuesday ahead of the cold front. An upper level trof is moving across the Great Basin, and will become negatively tilted as it moves eastward across the Plains. A cold front will sweep across the area late Tuesday Night into Wednesday, bringing a notable cool-down for Wednesday.
/issued 828 PM EST Mon Nov 25 2019/ Very quiet night weather-wise with mostly clear skies, a very stable air mass across Soflo, and cooler temps expected again for morning lows. High pressure has brought cooler and drier conditions across South Florida today.
939 PM MST Mon Nov 25 2019 Latest surface observations and model trend are showing a slightly warmer evening for our local area.
Wednesday, weak upper ridge pops up over the plains as first system speeds away into the Great Lakes and deep upper low/trough settles in over the west coast.
A warm front will move north through the region through the day today with a moist airmass rolling into the area behind the front. With the cold air in place with lows in the lower to middle 30s, either a cold rain or rain mixed with some snow will occur.
A baggy area of high pressure centered near Bermuda supports light to gentle northeast to east breezes across the coastal waters of the Florida Keys. From synopsis, weak high pressure will slide east into the western North Atlantic tonight through Wednesday. Stronger high pressure will spread across the entire eastern U.
345 AM EST Tue Nov 26 2019 High pressure will prevail across the area today. A cold front will move through Wednesday night, followed by high pressure.
230 AM EST Tue Nov 26 2019 The upper flow pattern will become increasingly meridional across the CONUS as a strong low pressure system develops across the central Great Plains. Mid-level ridging will amplify poleward in response, with height rises locally as the ridge extends from the Caribbean Sea into the western North Atlantic Ocean. The exception will be along the Atlantic beaches where the onshore flow should keep lows in the lower 70s.
Otherwise, expect high temperatures to settle into the lows 70s to low 80s. For tonight, a cold front will pass into the area overnight brining north winds across the region. Low temperatures will settle into the low 30s to low 40s across the area.
Cloud cover and colder air will keep temperatures close to the freezing mark at Snake River plain elevations. Sat may see residual leftover snow in the eastern half of the forecast area, but continued low pressure over the northern Great Basin keeps the threat going each day of the week. Afternoon highs will stay below freezing for all locations until Sun.
306 AM MST Tue Nov 26 2019 Current surface map places deepening low over Colorado with high pressure across Montana into North Dakota. Mid-Upper level low cuts off today along the Kansas/Nebraska border. Upper low shifts east of the area tonight, with ridge building across the area on Wednesday.
Shower activity is expected to be most numerous ahead of a cold front that will move across the terminals after 28/06Z. The activity is forecast to become more concentrated late this afternoon and tonight along a cold front that will be moving across the area.
640 AM EST Tue Nov 26 2019 High pressure will prevail across the area today. A cold front will move through Wednesday night, followed by high pressure.
The upper low over northern AZ has started to attain its expected negative tilt with the tilt becoming more pronounced as it progresses eastward through the morning. Cloud cover aside, all other aspects for making high winds are in place and as such warrants continuation of the High Wind Warning and the Wind Advisory.
Cheyenne CWA in the northern diffluent portion of this low. Halleck Ridge gusting to 41 mph. Dana Ridge 39 mph.
900 AM EST Tue Nov 26 2019 High pres ridge centered over the FL Keys/ern GOMex will maintain fair WX conditions areawide. Ridge axis will slide eastward today as a dvlpg storm system over the srn plains lifts into the Midwest. Hi pres ridge acrs the FL Keys/Ern GOMex will maintain favorable boating conditions today.
449 AM MST Tue Nov 26 2019 Current surface map places deepening low over Colorado with high pressure across Montana into North Dakota. Mid-Upper level low cuts off today along the Kansas/Nebraska border. Upper low shifts east of the area tonight, with ridge building across the area on Wednesday.
The rest of the day will feature increasing high clouds as a strengthening low pressure system tracks NE across the central Plains. Highs today will reach into the lower 60s across much of the area.
/issued 230 AM EST Tue Nov 26 2019/ The upper flow pattern will become increasingly meridional across the CONUS as a strong low pressure system develops across the central Great Plains. Mid-level ridging will amplify poleward in response, with height rises locally as the ridge extends from the Caribbean Sea into the western North Atlantic Ocean. The exception will be along the Atlantic beaches where the onshore flow should keep lows in the lower 70s.
305 AM CST Tue Nov 26 2019 Potent upper trough, currently moving east of the four corners region early this morning will shift into the central Plains today. The strong winds will likely persist through the evening hours immediately behind cold front.
230 AM MST Tue Nov 26 2019 High pressure will bring mainly dry weather to NE Montana today. Upper low along the Pacific Coast will dive south today and will be centered over Oregon on Wednesday. Eastern Montana will have an upper ridge to the east of this low tonight and Wednesday morning with mainly dry weather. The ridge moves to the east Wednesday afternoon and night while the upper low center moves south to California.
The activity is forecast to become more concentrated late this afternoon and tonight along a cold front that will be moving across the area.
High pressure is firmly in control, and will remain in control through the rest of the work week.
With strong subsidence and light winds high temps will rapidly rebound into the low/mid 70s for most inland areas. Mostly clear skies have allowed for good radiational cooling under weak high pressure. Temperatures will warm quickly today into the low 70s under mostly sunny skies with light SE winds around 5-10 mph. Tonight, mostly clear skies will allow temperatures to cool down again, but with increased moisture levels, low temperatures for Wednesday morning will not be as chilly, only dropping down into the mid to upper 40s for inland locations and the low 50s along the coast.
Much cooler temperatures and drier weather can be expected for the remainder of the holiday week. Meanwhile high clouds will thicken in response to an approaching strong low pressure to the south. except for tweaking the wording of the existing advisories to bring the expected wind speed up to the high end of this criteria during the day tomorrow. A strong vertically stacked low pressure system will move into Oregon this evening.
Avery High pressure will bring mainly dry weather to NE Montana today. Upper low along the Pacific Coast will dive south today and will be centered over Oregon on Wednesday. Eastern Montana will have an upper ridge to the east of this low tonight and Wednesday morning with mainly dry weather. The ridge moves to the east Wednesday afternoon and night while the upper low center moves south to California.
233 PM CST Tue Nov 26 2019 The low continues to track toward eastern Iowa this afternoon. The low moves over the Great Lakes on Wednesday. Latest trends have the system a bit warmer with the low trending a bit further to the north. This has led to more freezing rain and drizzle chances at the sacrifice of snow accumulations.
1222 PM EST Tue Nov 26 2019 High pressure will prevail across the area today. A cold front will move through Wednesday night, followed by high pressure.
1045 AM EST Tue Nov 26 2019 High pressure will prevail across the area today. A cold front will move through Wednesday night, followed by high pressure.
Ceilings will again fall this evening ahead of a prefrontal trof that'll push across the region 4-9z. followed by the cold front a few hours later.
Temperatures tonight are expected to drop down into the upper 40s for inland areas and in the lower to mid 50s for coastal areas and along the St Johns River.
The southeast portion, Dickey and Lamoure counties may see a chance of snow late tonight as the northern edge of teh trough moves through, however the precip amounts will be little of any. Even with the sun we expect Highs Wednesday only in the lower 30s with increasing cold advection.
Increasing south/southwesterly winds will shift to the west this evening as a cold front punches east.
1053 AM MST Tue Nov 26 2019 Latest water vapour loop had upper low spinning over northwest KS. Bands will start to move east later this afternoon as upper low accelerates east/northeast. Current surface map places deepening low over Colorado with high pressure across Montana into North Dakota. Mid-Upper level low cuts off today along the Kansas/Nebraska border. Upper low shifts east of the area tonight, with ridge building across the area on Wednesday.
Thanks to the cold front behind the precip, we'll see Wednesday's high temperature occur in the morning.
Rapid clearing and dry air will lead to much colder temperatures tonight, likely in the low teens west - and not out of the question to see some single digits in the ark valley.
Temperatures warming nicely and as of 16z were mostly in the lower to middle 70s with a few 60s noted across SE OK/SW AR as well as NE LA. Cold front should push all convection south and east of our region later tonight and thus, have shown a wind shift across all terminal locations overnight.
The low level jet ramps up in the evening and will cause a period of LLWS. Ceilings will drop to MVFR, if not IFR, as the cold front approaches overnight. Behind the cold front winds will veer toward the west, but remain sustained at 15 kts with some gusts to 25 kts.
1014 AM MST Tue Nov 26 2019 Current surface map places deepening low over Colorado with high pressure across Montana into North Dakota. Mid-Upper level low cuts off today along the Kansas/Nebraska border. Upper low shifts east of the area tonight, with ridge building across the area on Wednesday.
The low continues to track toward eastern Iowa this afternoon. The low moves over the Great Lakes on Wednesday. Latest trends have the system a bit warmer with the low trending a bit further to the north. This has led to more freezing rain and drizzle chances at the sacrifice of snow accumulations.
Precipitation will end from west-east this evening -- in assoc/w subsidence in the wake of the upper level trough progressing east across the Tri-State area. With weakening winds, clearing skies, and a fresh snowpack, expect chilly lows ranging from near 0 degrees in eastern Colorado to the lower-mid teens east of Highway 283. Just for Wednesday, we will see a quiet weather day, as a ridge treks ahead of another trough that will bring freezing precipitation and rain come Thanksgiving Day.
Lull expected through the rest of the day into tonight between the departing system and the next trough dropping south along the west coast. The active winter weather pattern will continue through the beginning of the period as a strong upper low over the west coast slowly traverses east.
So we're not going to experience much thunder, even as the cold front comes through overnight.
Looking southeast toward main upper low spinning over central KS, best 800-600mb frontogenesis associated with this system remains southeast of the CWA, continuing to weaken over the CWA. Tonight into Wednesday, KS upper low zips east/northeast as strong jet streak dives into the west coast carving out another upper trough. Upper ridge pops up over the CWA Wednesday, but without appreciable warm air advection, temperatures will remain 5-10F below normal.
Increased shower activity is expected along and just ahead of a cold front that will sweep west to east across the forecast area between midnight and sunrise. The cold front drops into the lakes region towards midnight and looks to make the southwest Louisiana coast towards sunrise.
Strong low pressure system moving across Kansas this evening will result in a period of strong west winds with gusts of 30-40 knots through about 09z. /Issued 327 PM CST Tue Nov 26 2019/ Rapidly deepening low pressure system in the Plains is causing lots of active weather across a large area this afternoon. Surface cold front is now pushing into far western Oklahoma where dewpoints have fallen into the single digits/teens and dangerous fire weather conditions are ongoing. The higher severe threat will be across central AR/northern LA. There will be a low potential for isolated strong storms tonight across northwest Arkansas, if storms can redevelop as the cold front moves east and interacts with the better moisture. Widespread cold rain will develop for Thanksgiving Day, with highs only in the low to mid 40s.
439 PM MST Tue Nov 26 2019 Precipitation will end from west-east this evening -- in assoc/w subsidence in the wake of the upper level trough progressing east across the Tri-State area. With weakening winds, clearing skies, and a fresh snowpack, expect chilly lows ranging from near 0 degrees in eastern Colorado to the lower-mid teens east of Highway 283. Just for Wednesday, we will see a quiet weather day, as a ridge treks ahead of another trough that will bring freezing precipitation and rain come Thanksgiving Day.
The cold front drops into the lakes region towards midnight and looks to make the southwest Louisiana coast towards sunrise.
318 PM CST Tue Nov 26 2019 A low pressure system will move through the area tonight into tomorrow morning.
335 PM MST Tue Nov 26 2019 Precipitation will end from west-east this evening -- in assoc/w subsidence in the wake of the upper level trough progressing east across the Tri-State area. With weakening winds, clearing skies, and a fresh snowpack, expect chilly lows ranging from near 0 degrees in eastern Colorado to the lower-mid teens east of Highway 283. Just for Wednesday, we will see a quiet weather day, as a ridge treks ahead of another trough that will bring freezing precipitation and rain come Thanksgiving Day.
327 PM CST Tue Nov 26 2019 Rapidly deepening low pressure system in the Plains is causing lots of active weather across a large area this afternoon. Surface cold front is now pushing into far western Oklahoma where dewpoints have fallen into the single digits/teens and dangerous fire weather conditions are ongoing. The higher severe threat will be across central AR/northern LA. There will be a low potential for isolated strong storms tonight across northwest Arkansas, if storms can redevelop as the cold front moves east and interacts with the better moisture. Widespread cold rain will develop for Thanksgiving Day, with highs only in the low to mid 40s.
A weak cold front will move through the area today.
Patchy BR is developing across the coastal plains with MVFR/IFR VSBYs and CIGs as winds continue to weaken ahead of an approaching cold front with moist conditions in place.
This is in response to the consolidating high pressure system near Bermuda, driving a little more gradient over South Florida and the Keys. Temperatures are in the lower 70s and dewpoints are in the mid to upper 60s. From synopsis, weak high pressure will slide east into the western North Atlantic tonight and Wednesday. Stronger high pressure will expand across the entire eastern U.
Main cold front as of 08z is over western TN, central/eastern MS as indicated on radar as a line of thunderstorms. CAA behind the cold front allows for cooler air to filter into the Tennessee Valley tonight. As high pressure over the Gulf of Mexico amplifies the subtropical ridge, the weather over the forecast area will be precip free in part due to a combination of subsidence and a dry airmass.
Much cooler temperatures and drier weather can be expected for the remainder of the holiday week. Cameras from Leavenworth to Coles Corner to Stevens Pass shows snow falling, as well as across Blewett Pass and Mission Ridge. A strong vertically stacked low pressure system will move into Oregon this evening.
The boundary is progged to push through all but lower Acadiana by early morning, with rain chances ending and cooler/drier air filtering in behind the front. Increased shower activity is expected along and just ahead of a cold front that will sweep west to east across the forecast area between midnight and sunrise. The cold front drops into the lakes region towards midnight and looks to make the southwest Louisiana coast towards sunrise.
Rain will gradually increase across the area as a low pressure system approaches from the west. Most of the rain should exit the area between 12-14Z, followed by a cold front passage that will bring gusty winds to the terminals along with clearing skies.
A brief lull in the weather is expected today as weak high pressure builds into region with light winds this afternoon and temperatures climbing into the lower 50s at most locations. With the expected clouds/widespread rain, temperatures will likely remain on the cold side with highs only in the lower to mid 40s.
Much cooler temperatures and drier weather can be expected for the remainder of the holiday week. Cameras from Leavenworth to Coles Corner to Stevens Pass shows snow falling, as well as across Blewett Pass and Mission Ridge. /Nisbet 06Z TAFS: A strong low pressure system is moving into the OR/CA border tonight.
A bit more north wind today and thus a bit less low level moisture and think risk of flurries/freezing drizzle while not zero, is quite low due to the lack of lift behind the departing storm system into Wisconsin and Upper Michigan.
09z/3am surface analysis shows a 992mb low over northeast Iowa, with a trailing cold front extending into west-central Illinois. With a tightening pressure gradient and impressive 8-10mb 3-hour pressure rises behind the low across western Missouri, a corridor of extremely strong winds has developed from northern Missouri into the SW KILX CWA. This high momentum air will overspread the entire area over the next few hours as the low continues to deepen and lift northeastward into the Great Lakes. Given upstream obs across Missouri, have decided to expand the High Wind Warning to the entire CWA. Much lighter winds are anticipated on Thanksgiving Day as high pressure builds into the region.
Off the Caprock precip is expected to remain liquid as temps are expected to remain above freezing. While ice accumulations are expected to be on the order of a few hundredths of an inch or less this could still cause travel issues especially on elevated roads and bridges.
Precipitation should diminish Thursday night, but in the event some chance remains, point forecast soundings would indicate light freezing rain for a bit of time with only light icing accumulations, if any.
The model soundings of the NAM and SREF suggest most of the precipitation late tonight and Thursday will fall as snow while the GFS suggests freezing rain as the predominant weather type. The forecast leans on the SREF and NAM for light snow with a chance of freezing rain, mainly east of highway 83 where temperatures aloft will be warmer. The warm air aloft will continue to increase Thursday night but rain/freezing rain chances will decrease.
Farther South, middle and upper winds lighten up markedly as South Florida & the Keys are just north of the center of a large synoptic scale middle and upper level anticyclone positioned near Pinar Del Rio, Cuba. At the surface and in the lower to middle levels(Surface to 700 mb), latest available land and marine observations and analysis as of 900 am, detail a developing winter storm near Des Moines, with an arcing attendant cold frontal boundary that trails down into southern Texas. Rest of today and this evening, surface ridging across Florida will keep northeast to east winds around 10 mph over the islands and 10 knots over land. Given abundant insolation, and a slightly higher breeze, our temperatures should reach the lower 80s, a few more degrees than yesterday.
Much cooler temperatures are in store for the week.
Although the low will dampen some within southwest flow, lift and more than ample moisture will result in widespread precipitation this evening into Thursday. With a rather cool/cold air mass in place, temperatures will approach and or drop below freezing, as the precipitation begins across west central/northwest Oklahoma. Perhaps the most likely scenario will be for precipitation to start as a wet snow across northwestern Oklahoma with rain/freezing rain (maybe sleet) farther south. Overnight, temperatures may warm just enough across west central Oklahoma for a very cold rain with freezing rain or maybe snow across northwestern Oklahoma. Some light ice or snow accumulations are possible across northwest Oklahoma by sunrise Thursday, but surface temperatures will gradually warm above freezing Thursday morning.
Latest trends indicate rain may be a bit more dominant at KLBB at least, and still rain at KCDS, while KPVW remains up in the air and may switch to freezing rain by early or mid evening. Off the Caprock precip is expected to remain liquid as temps are expected to remain above freezing. While ice accumulations are expected to be on the order of a few hundredths of an inch or less this could still cause travel issues especially on elevated roads and bridges.
419 AM EST Wed Nov 27 2019 Under mostly clear skies and light east to occasional southeast winds, temperatures have climbed into the lower to mid 70s during the late night and overnight period along the island chain. An expansive and deep tropospheric anticyclone lying from the Bahamian chain to across the Florida Keys, and the adjacent Atlantic and Gulf waters will expand and sharpen as it lifts poleward from the Gulf of Mexico northward to the Upper Great Lakes by the end of this week. Temperature wise, high temperatures will mainly hover around 80 degrees with overnight lows generally in the lower 70s.
337 AM CST Wed Nov 27 2019 (Today and Tonight) An upper level low will continue to dig south across California today and tonight. This upper low will cause Pacific and Gulf moisture to override the surface cold airmass in place across West Central Texas later today, bringing increased cloudiness and a chance of rainfall to the area tonight. (Thanksgiving Day through Wednesday) Unsettled pattern will continue as the main upper level trough moves into the Rockies.
541 AM EST Wed Nov 27 2019 [Through 12z Thursday] Cloud cover will increase this morning ahead of an approaching cold front with MVFR to IFR conditions expected to develop for most of the terminals with the exception of KVLD, which is expected to remain VFR. A weak cold front will move through the area today.
440 AM MST Wed Nov 27 2019 Current surface map places low across southern Wisconsin with weak high pressure across the western Dakotas.
/issued 337 AM CST Wed Nov 27 2019/ (Today and Tonight) An upper level low will continue to dig south across California today and tonight. This upper low will cause Pacific and Gulf moisture to override the surface cold airmass in place across West Central Texas later today, bringing increased cloudiness and a chance of rainfall to the area tonight. (Thanksgiving Day through Wednesday) Unsettled pattern will continue as the main upper level trough moves into the Rockies.