Aikyam-Lab/Synoptic-Bench huggingface dataset:
The cold front was a bit behind the line, at this time, seeing a wind shift to the northwest, and about 5 to 10 degree temperature drop behind it. Otherwise, convection will end from west to southeast ahead of the front, bringing much cooler temperatures and becoming sunny on Tuesday. A cold front and upper system will move through AR and develop scattered showers and isolated thunderstorms that will affect all Taf sites. Winds ahead of the cold front will be south at 10 to 20 mph, then switch to the west to northwest at 10 to 20 mph. Ceilings will also thin and lift gradually from the northwest behind the cold front.
With clear skies we should burn off by mid morning tomorrow with the main inhibiting aspect being the low sun angle this time of year. It is going to take some time for the sun angle to become high enough to begin to burn through the low stratus and fog and expect visibilities to remain below 1 SM until 14-15 utc. High pressure over New England will shift eastward through mid week.
Issued by National Weather Service PENDLETON OR 230 PM PST Mon Dec 4 2017 Strong high pressure will intensify over the Pacific Northwest early this week, persisting through at least the weekend. Areas of low clouds and fog will develop in the lowlands by midweek, persisting through at least the weekend. For tonight/Tuesday, the mid level ridge will amplify along the coast.
703 PM EST Mon Dec 4 2017 Showers will overspread the area tonight into early Tuesday morning as a strong cold front moves through the Ohio Valley. There will likely be a break in activity before showers along and ahead of the cold front push into the region during the overnight hours. There will only be cooling in the western counties towards daybreak as the cold front enters the area. Strong surface cold front bisecting the area at 12Z to push east of the area by 15Z. Temperatures by evening to range form the mid 30s nw to the lower/middle 40s southeast. Broad mid/upper level trof to settle into the Great Lakes/Ohio Valley Tuesday night.
Models are in good agreement and show energy moving through the northern and southern streams combining to carve out a large trough that will ultimately encompasses practically the entire CONUS, stretching from the Continental Divide eastward to the Atlantic Coast. This feature will pull a strong cold front through the Commonwealth overnight and into our area by around dawn Tuesday. Accompanying the front will be a soaking rain and the initial punch of much cooler air into the coal fields. Typically cooler eastern valleys will even decouple and cool rapidly through the evening. Also expect a non diurnal trend to temperatures through the day Tuesday and colder air pours into the area behind the cold front.
1022 PM EST Mon Dec 4 2017 Strong cold front Tuesday.
611 PM EST Mon Dec 4 2017 A cold front will bring rain late tonight and Tuesday. Fries The cold front associated with this wave will cross the region on Tuesday. Although PWAT will be unseasonably-high and approaching the daily record maximum owing to a strong sly low- level jet, the high moisture content will last only a short time and the strongest forcing with the wave will pass by to the nw, which may reduce the precipitation efficiency. The greatest chance of lingering wintry precipitation will be in the ern zones near the ridges, where the shield of precipitation will reside late in the day. A major shift in the atmospheric flow pattern will be ushered in with the passage of the cold front, with a broad longwave trough in the ern CONUS and a sharpening ridge in the wrn CONUS.
945 PM EST Mon Dec 4 2017 Showers will overspread the area tonight into early Tuesday morning as a strong cold front moves through the Ohio Valley. There will be a lull in precipitation for several hours before the next round of showers along and ahead of the cold front moves into the region later tonight. Exception will be in the far northwest counties where the cold front will move in late in the period with a sharp drop in temperatures. Strong surface cold front bisecting the area at 12Z to push east of the area by 15Z. Temperatures by evening to range form the mid 30s nw to the lower/middle 40s southeast. Broad mid/upper level trof to settle into the Great Lakes/Ohio Valley Tuesday night.
1035 PM EST Mon Dec 4 2017 It will remain relatively warm ahead of an approaching strong cold front through Tuesday.
Conds wl improve Fri morning but a cold front wl drop in and produce a wind shift and -SHRA GLH-GWO by 16Z. This combined with a mid level high over the northern Gulf will contribute to a warmer than normal day with above normal relative humidity. This has helped temperatures climb up into the lower 70s already across much of our area. Warm air just above the boundary layer should put a lid on any convective potential today, but the approaching cold front may produce a few showers in the far north toward dawn Friday. Speaking of the cold front, the pressure gradient over the Delta region will tighten considerably as the front draws near today.
435 PM EST Thu Feb 15 2018 Low pressure and a cold front will result in widespread rain tonight. Moderate rain has begun to move into central and eastern Ohio with low pressure. An associated cold front will trail the low, allowing rain to persist into the overnight hours. After a warm day today, temperatures will be near or below freezing by sunset Friday.
1257 PM EST Thu Feb 15 2018 A warm front will keep light rain chances through this morning before low pressure and a cold front results in widespread rain later today and tonight. Several river flood watches also continue for the Monongahela and Ohio rivers where the highest QPF is progged. The low is progged to slide E to N Cntrl PA late tonight, as it drags its associated cold front across the area. The cold front should complete its passage Friday, with precip chances tapering off after FROPA.
A cold upper trough will cross Utah today. A weak trough will clip far northern Utah Friday night.
KBYX Doppler radar shows weak and widely-spaced isolated showers pushing westward through the Atlantic waters well south and southwest of the Lower Keys. The mid level ridge will remain prominent from the southern Gulf of Mexico across the southern half of the state and into the Atlantic.
235 PM CST Thu Feb 15 2018 (Tonight and tomorrow) A cold front will begin to move into the northern portions of the Big Country by the late evening. Overnight lows across these areas will be in the low to mid 40s, while areas ahead of the front will see warm overnight temperatures in the low to mid 50s. By Friday morning, the cold front will be moving southward across the region. Cooler temperatures and gusty northeast winds will accompany the frontal passage. Much of the area will be 20 to 25 degrees cooler on Friday, compared the very warm day we saw on Thursday. Highs will range from the low 50s across the Big Country, to the mid to upper 50s across much of the Concho Valley. Across the interstate 10 corridor, highs will be in the low 60s.
324 PM EST Thu Feb 15 2018 A small area of low pressure will track north of the area tonight. A cold front will cross the region on Friday.
202 PM EST Thu Feb 15 2018 Unseasonably mild, moist air in place, until a cold front crosses early Friday morning. High pressure Friday night.
Tricky temperature forecast with readings in the lower 50s in the south near the KS/MO borders and lower 30s in the north. Meanwhile, a strong cold front stretching from northwest MN to central MT as of 08z will advance south today, reaching northeast NE this afternoon.
A cold front will cross the area early on Friday. High pressure will build north of the area Friday night.
1207 PM EST Thu Feb 15 2018 A warm front will keep light rain chances through this morning before low pressure and a cold front results in widespread rain later today and tonight. Several river flood watches also continue for the Monongahela and Ohio rivers where the highest QPF is progged. The low is progged to slide E to N Cntrl PA late tonight, as it drags its associated cold front across the area. The cold front should complete its passage Friday, with precip chances tapering off after FROPA.
258 PM EST Thu Feb 15 2018 Light rain and areas of fog will continue through the early evening with dry and cooler conditions anticipated by late tonight. Temperatures tomorrow will hover around freezing.
/Issued 521 AM CST Thu Feb 15 2018/ Above normal temperatures are once again in the forecast for today in advance of a cold front. The above mentioned cold front will approach the OK Panhandle late this afternoon and sweep southward across the Texas Panhandle this evening and tonight with gusty north winds in its wake for several hours.
A cold front will be entering the area near Interstate 30 corridor near 16/13Z and over the remaining areas during the day Friday with rain becoming more widespread in the end of the forecast period and beyond.
246 PM CST Thu Feb 15 2018 As of 21Z Thursday afternoon a mid-level trough axis extended from the northern Plains into southern California. At the surface a trough was bisecting the CWA from northeast to southwest. The deeper mixing has also resulted in lower surface RH values in the lower 20 percents. Short term solutions are also trending towards slightly warmer temperatures overnight with lows in the upper teens and 20s.
333 PM EST Thu Feb 15 2018 High pressure will remain over the western Atlantic through Friday.
1129 AM CST Thu Feb 15 2018 Warm temperatures will be the name of the game today out ahead of a cold front that will move through the region later this afternoon. That said, warm front over our region this morning will not totally clear the CWA before the cold front arrives later today, meaning there should be a pretty healthy temperature gradient across our region. Behind this secondary feature, gusty north winds will overspread the region with 25-30 mph gusts expected through early Friday before high pressure leads to weakening speeds by early afternoon. The main interest item for Friday will be the noticeably cooler temperatures as highs Friday afternoon will only warm into the lower to middle 30s.
Low stratus will develop across the southern terminals during the morning ahead of an approaching cold front. The cold front will move through KABI and KSJT between 11-12z and between 15-16z at the southern terminals. Meanwhile, a cold front will drop south into the area late tonight, reaching KABI (Abilene) by right around 12Z and bringing gusty north winds. /issued 411 AM CST Thu Feb 15 2018/ (Today and Tonight) A warm morning ongoing with temperatures still holding in the lower 60s across much of the area. Temperatures should be a few degrees warmer than yesterday, mainly in the low to mid 80s. Mild again for much of the night, although the cold front we have talked about for several days will begin crashing through West Central Texas by sunrise, likely reaching the I-20 corridor from Sweetwater to Abilene.
1045 AM MST Thu Feb 15 2018 Snow has diminished outside of the higher mtns this morning and webcams/obs showing little snow falling now. Snow will continue to fall over the higher mtns today as moist winds are lifted up the facing slopes. Otherwise a cold front will drop south across the CWA with temperatures falling behind it later this morning and afternoon.
This will allow fog to form again tonight over the cooler nearshore waters, tidal lakes, and river basins. This is likely tomorrow as well, through clouds may persist more across western and northern areas ahead of the cold front. This weekend a weak cold front will approach the area and dissipate inland across the central Gulf Coast.
The closest to a record right now is Bowling Green where so far the high temperature has been 76. The better chance for rain will come later tonight through mid afternoon on Friday as a strong cold front swings through the area.
220 PM CST Thu Feb 15 2018 A cold front which lies from southeast Colorado into eastern Wisconsin will continue to push south. However, an upper level short wave trough will move northeast in the southern jet stream and it is expected to bring precipitation mainly to the south of the Texas Panhandle on Friday night.
A mid to upper level ridge will remain near the Gulf Coast region through the period, while a trough an associated surface cold front move across the Ohio Valley region tonight and into the TN Valley tomorrow.
253 PM EST Thu Feb 15 2018 Patchy freezing drizzle should end later this afternoon and evening, then some light to possible moderate lake effect snow is expected over the eastern counties tonight. Some lingering dry air above 850 mb has led to some patchy freezing drizzle at a few western locations of the cwa this afternoon, but no real ice accumulation nor impacts have been reported. Forecast soundings suggest patchy freezing drizzle could mix with light snow at a few locations west and north central into late afternoon/early evening before gradually changing over to all -shsn from the north and west. Tonight: As the cold front continues south and east of the area, north to northwest flow across Lake Superior will increase.
319 PM CST Thu Feb 15 2018 A strong surface cold front continues to drop south across South Dakota, bringing gusty northwest winds along with it.
1138 AM CST Thu Feb 15 2018 Strong troughing across the western United States early this morning with an increasing upper level jet from the southern into the central Plains. Went ahead and increased pops and qpf for this event with the highest amounts near highway 14.
145 PM PST Thu Feb 15 2018 A cold front will exit to the south this afternoon ushering in dry, warm, and sunny conditions through the weekend.
204 PM MST Thu Feb 15 2018 Skies are clearing from northwest to southeast this afternoon as arctic high pressure builds in out of Canada.
233 PM CST Thu Feb 15 2018 Looks like the warm front made it about as far north as a Macomb to Peoria to Chenoa line today, with the fog still lingering to the north early this afternoon.
A colder airmass will push into the area tonight in the wake of cold front that exited this afternoon.
As mixing gets underway the low stratus and fog should begin to erode with increasing amounts of sunshine expected from noon time on and into the afternoon as dry stable conditions under deep layered ridging continues. Similar to yesterday once the fog burns off temperatures now generally in the 60s will climb rapidly into the lower and middle 80s over interior sections with mid to upper 70s expected along the immediate coast due to the sea breeze development by early afternoon. Tranquil boating conditions with light east-southeast winds and slight seas will continue over the Gulf waters the remainder of today as high pressure remains in control with a weak pressure pattern supporting an onshore seas breeze component developing along the coast during the afternoon.
340 PM EST Thu Feb 15 2018 Low pressure and a cold front will result in widespread rain tonight. Moderate rain has begun to move into central and eastern Ohio with low pressure. An associated cold front will trail the low, allowing rain to persist into the overnight hours. After a warm day today, temperatures will be near or below freezing by sunset Friday.
1143 AM CST Thu Feb 15 2018 The lower CIGS/VIS have started to lift for all but the immediate coast (GLS) at this time.
The forcing mechanism for the rain to our west today will shift to the south as short wave energy is diving southward down the West Coast helping drive the upper trough responsible for the rainfall further southward while also closing off some of the energy to the west of Baja California. Rain should begin to spread eastward toward the forecast area during the day Friday as the first short wave trough ejects from the main trough.
Friday an upper level trough and weak warm front will overrun the cold air mass currently over the Northern Rockies.
Otherwise an area of showers and perhaps a rumble or two of thunder will begin to develop across our NW counties by early evening and move through the area tonight along a strong cold front. Later tonight, a cold front will approach from the north, forcing some showers and even a clap of thunder or two. Much cooler weather is expected with highs only in the upper 30s to lower 40s.
As such, removed most of the higher pops outside of Central South Dakota, with much lower snowfall totals north of 212 and east of the Missouri River. An area of low pressure and Arctic front will cross the region today.
303 PM EST Thu Feb 15 2018 A cold front over the northern Ohio river valley will slowly push southward into tonight with a passage across eastern Kentucky late Friday morning through the afternoon. Rain chances a certainty, so will maintain the high rain chances. Temperatures will take a quick tumble Friday afternoon as cold advection kicks in behind the cold front. The cold advection could push our low temperatures down into the low to mid 30s. MVFR cigs will also continue through the afternoon before lower to near IFR late tonight as a cold front pushes through tonight. The rain will likely persist through the end of the TAF forecast period along with the lower ceilings.
A cold front with elevated and gusty north to northeast winds will move into the area beginning around 12z. Lee trough will move farther e today, probably even e of MAF by 00Z. Despite high clouds it will again be warm today along and e of trough, 15-20 degrees above normal. Thereafter a strong cold front will move thru plains early Fri AM and as said jet moves ewd precip is expected to renew across the far wrn CWFA around 15Z-18Z Fri and then expand e, but a narrow axis INVOF RRQ of jet and secondary jet approaching from the sw. Much cooler still looks to be a good be on Fri. A cold front may bisect the NE CWFA Tue from around a Lamesa-Big Spring, thus mostly above normal temps s of the front Tue.
1128 AM EST Thu Feb 15 2018 Update Fog and drizzle will persist this morning then rain showers will move through this afternoon as low pressure tracks south of Michigan. A cold front comes through tonight with rain showers changing to snow showers. Widespread dense fog should persist until the cold front sweeps through late this afternoon. Not expecting much accums as inversion heights are around 5 kft then crash as sfc ridging builds in Friday afternoon.
With a deep layer ridge in place and light southerly flow from the Gulf, fog and low cigs will spread across the region once again tonight.
103 PM EST Thu Feb 15 2018 Aviation Fog and drizzle will persist this morning then rain showers will move through this afternoon as low pressure tracks south of Michigan. A cold front comes through tonight with rain showers changing to snow showers. Widespread dense fog should persist until the cold front sweeps through late this afternoon. Not expecting much accums as inversion heights are around 5 kft then crash as sfc ridging builds in Friday afternoon.
Current temps are now in the lower 70s for most locations.
A cold front is forecast to move past the KAUS terminal by around lunchtime tomorrow. Upper air analysis last evening showed a broad ridge extending over the southern part of the country. At the surface, high pressure was centered over the Gulf and winds across our CWA were from the southwest to southeast. Temperatures and dew point temperatures were generally 10 to 15 degrees warmer than 24 hours ago. The upper level ridge will slowly retreat to the southeast during this period. The low level flow will continue from the south to southeast with enough isentropic lift to produce patchy drizzle today. A cold front will move through our CWA from the north bringing a slight chance for showers during the day Friday.
341 PM CST Thu Feb 15 2018 High pressure was building across the Northland in the wake of this morning's cold front. The trough will swing through the Northland this evening with a brief increase in cloud cover expected. Nudged overnight lows a little colder with readings in the -5 to -15 degree range for most locales, but a little warmer near Lake Superior in northwest Wisconsin. Friday appears sunny with cooler temperatures in the teens and 20s above zero. As the long wave trof retrogrades slightly, this will allow for more wave amplification in the part of the stream originating in the Pacific NW and northern Rockies.
329 PM CST Thu Feb 15 2018 Despite persistent onshore winds the past couple days, the lack of a significant boundary and strong mid level ridging centered offshore has limited precip.
1027 AM MST Thu Feb 15 2018 Upper trough axis now extends from the northern Rockies into the Great Basin region and northern California. a strong cold front is now crossing east central Montana into North Dakota, with snow falling over those areas into northwest South Dakota. Snowfall is expected across the area, with the higher amounts will be limited to parts of northeast Wyoming to northwest South Dakota. At this time it looks like counties farther south may still see some localized impacts with snow/blowing snow, but the higher confidence is across northwest South Dakota where snowfall amounts will be greater.
High pressure over The Gulf continues to produce southerly flow into the region.
113 PM CDT Wed Jul 26 2017 Upper level ridging just west of the Rockies will build during the next few days and our upper level flow pattern will go from a westerly to a northwesterly pattern. A cold front/wind shift/drier airmass boundary extends from western Lake Superior to a low pressure area in central Kansas. As cooler air filters in this afternoon a few scattered low clouds will form. High pressure will continue to build overnight and Thursday.
640 PM EDT Wed Jul 26 2017 High pressure moves off the mid-Atlantic coast through Thursday.
Cumulus becoming more congested from the VCT area and northeast with convection increasing along the Lower Texas coast. Water vapor imagery shows a weak upper low over Coahuila moving slowly westward. With weak low level convergence along sea breeze boundary and some weak assistance for lift with divergence aloft to the east of the upper low, convective activity could become scattered in coverage over the inland coastal plains into the eastern Brush Country this afternoon.
This evening's surface and upper-air analyses showed a weak area of low pressure across south GA (850-500 mb), with ample deep layer moisture concentrated along the low's southern flank. The 1000-700 mean winds across much of our forecast area will be from the north today, on the western periphery of this low. The highest PoPs (60%) will be around Tallahassee, Madison, Valdosta, and Tifton, where there will be more favorable moisture and mesoscale forcing. Despite the presence of the low pressure system, deep-layer vertical wind shear will be light (15 kt or less) and mid-layer lapse rates unimpressive (6 C/km), and not conducive for organized severe storms. High temperatures will be in the lower 90s.
The 500 millibar high pressure situated over central New Mexico is allowing for drier southwesterly air aloft to filter over the area. The lower desert will have very little, if any, CAPE to work with during the next two days. At 12Z, the Phoenix sounding indicated the 500 mb temperature was a little cooler than -4 deg C, and the southwesterly flow aloft will help warm that layer an additional degree or two by tomorrow. An isolated storm or two might be possible over the mountains in Gila County tonight and Thursday, but with nearly no CAPE and warming aloft, one would be hard pressed to find much convection over the lower desert. However, the drier atmosphere will lead to slightly warmer temperatures peaking 2-5 degrees above normal.
313 PM EDT Wed Jul 26 2017 High pressure extending across the central and northern Appalachians will bring us a pleasantly warm afternoon with comfortable humidity.
201 PM EDT Wed Jul 26 2017 High pressure will continue to extend across the area into tonight.
An upper low over northern California will slowly move inland today for isolated thunderstorms over the Oregon Cascades south of Mt. An upper level trough approaches the area from the northwest tonight for an increase of inland clouds Thursday morning.