Aikyam-Lab/Synoptic-Bench huggingface dataset:
An upper level trough is slowly pushing eastward across Alabama early this morning. Skies are clearing across much of our area along and to the west of the trough axis,though a deck of stratocumulus and upper level clouds are still holding in place across eastern portions of our CWA per the latest IR satellite images and surface observations. The upper level trough will continue to translate east-southeast across the southeastern U. Another night of below normal temperatures are expected tonight with lows ranging in the lower to mid 30s northwest of I-65, and in the upper 30s to mid 40s farther south and east (except around 50 near the beaches).
500 mb ridge from southern california into montana today. the higher terrain of the western RRV may see temps rise some as very warm air exists at 925 mb (+14 to +17C). Temps safely above freezing so just liquid and no travel concerns.
a little warmer S and W and not quite that warm N and E. An upper level ridge of high pressure oriented from the desert southwest north through the Rockies will expand east onto the plains through the afternoon. The effects of the warmer airmass have already been noted with early morning temperatures averaging in the 30s to around 40 degrees, setting the stage for a solid warmup heading into the afternoon. For Hastings, a new record high is more marginal with the higher standing record and a current forecast high temperature shy of the 70 degree mark.
The strong cold front that has been expected to move through the Northern Rockies today is still on track as forecasted, in terms of timing. Due to this, the High Wind Watch is no longer in effect, and has been replaced with a Wind Advisory. Another potential impact with this cold front will be the lowering snow levels as is slides south through the region.
An area of low pressure located over eastern-central Gulf of Mexico during the overnight hours, will move to the northeast and reach northern Florida later this afternoon. By tonight, the low will elongate from off the coast of South Carolina to our northwest. A cold front will push southeast across the peninsula Thursday night through Friday.
637 AM EST Thu Nov 23 2017 High pressure will build build across the east coast today through early Friday, before shifting offshore later on Friday.
640 AM EST Thu Nov 23 2017 High pressure centered over the lower Ohio valley will remain in control across the area through Friday. Low pressure will pass just north of the Great Lakes Friday night, bringing a cold front through the local area.
928 AM EST Thu Nov 23 2017 High pressure centered over the lower Ohio valley will remain in control across the area through Friday. Low pressure will pass just north of the Great Lakes Friday night, bringing a cold front through the local area.
357 AM MST Thu Nov 23 2017 12Z TAF CYCLE Upper ridge axis to the west of NM with northwest flow aloft, variable high clouds and weak sfc lee trough. Quiet and warm weather will be the rule for the next several days thanks to an upper level ridge.
541 AM CST Thu Nov 23 2017 First off, Happy Thanksgiving everyone! I think most of us will be thankful for this nice forecast today as high pressure will be our dominate weather feature. Southerly flow kicks in tonight in response to low pressure tracking from Saskatchewan into western Ontario. Warmer start on Friday and southwest flow ahead of an approaching cold front will boost temperatures to near 50s across north central WI to the middle and upper 50s elsewhere. Cold front pushes through during the afternoon but look like better moisture convergence/chance of rain will be north of I-94. High pressure builds in Friday night for clearing skies with overnight lows expected to be in the 30 to 35 degree range. A short wave trough will cause the winds to shift to west northwest at the TAF sites by 23.
600 AM EST Thu Nov 23 2017 High pressure provides dry weather this Thanksgiving day and Friday.
513 AM CST Thu Nov 23 2017 High pressure over S TX will bring generally clear skies and light north winds. With excellent radiational cooling conditions in place, temperatures will continue to fall into the mid 30s to lower 40s with a few locations in the Piney Woods possibly touching freezing for an hour or two around sunrise. Dry north to northwest flow aloft will persist across the region today through this weekend with a gradual warming trend beginning Friday as upper ridging over the Desert Southwest nudges towards the east. Lows in the 40s to low 50s on Friday morning will quickly warm into the lower 70s Friday afternoon.
629 AM EST Thu Nov 23 2017 A series of low pressure systems will track from the Gulf of Mexico NE across Florida and offshore the Carolinas late Thursday through Friday night, providing variable cloudiness along with a slight chance of light rain, mainly in southern and eastern areas.
354 AM MST Thu Nov 23 2017 Latest upper level analysis shows a high amplitude upper ridge over the western CONUS. For today, the upper ridge axis will move eastward over the high plains with even warmer temps expected over the forecast area today. A substantial northern stream trough will affect the Northern Plains on Friday. Northwest winds of 25 to 35 mph with gusts to 50 mph will be likely for much of Friday morning as the cold front moves through.
Upper level ridge building into the region, along with westerly winds will bring much above normal temperatures into the region today. An upper level trough and surface front will cross the region on Friday.
330 AM MST Thu Nov 23 2017 Cirrus, along with some mid-level clouds over north-central Colorado, will continue to stream through the ridge of the high pressure over the western U. However, little moisture is available for precipitation in the lower levels of the atmosphere so expect dry weather for Thanksgiving. The cold front associated with this disturbance will bring close to 5 degs F of cooling to the north, but areas to the south will see little or no change in afternoon highs.
A warming trend will begin to take shape by Friday as southerly winds return to the region with high pressure shifting east of our forecast area.
Happy Thanksgiving from the HUN midnight crew! Latest water vapor images are showing an upper trough digging into NW MS with cirrus clouds streaming along and ahead of it. The trough will move through this afternoon but won't do much to the sensible weather. Another fantastic radiational cooling night is forecast for tonight but with slightly warmer 850mb temps and a moisture surge from the southeast, lows will be slightly warmer, in the upper 20s to middle 30s.
Chattanooga Airport, TN 57 36 61 43 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 55 34 59 42 / 0 0 0 0 Oak Ridge, TN 55 34 59 43 / 0 0 0 0 Tri Cities Airport, TN 52 30 58 36 / 0 0 0 0.
Strong cold front will bring gusty winds across the Northern. The strong cold front that has been expected to move through the Northern Rockies today is still on track as forecasted, in terms of timing. Due to this, the High Wind Watch is no longer in effect, and has been replaced with a Wind Advisory. Another potential impact with this cold front will be the lowering snow levels as is slides south through the region.
Chance of rain over the North Bay today while the rest of the region should remain dry with continued warmer than normal temperatures.
upper ridge so some thin high clouds spilling over the ridge. The strong upper level ridge that is set up over the West Coast will continue to keep the region under N to NW flow aloft today and tomorrow. Early tomorrow the upper level ridge becomes slightly flattened as a system moves across the Pacific NW. At the surface lee side troughing develops ahead of a surface cold front. Friday evening/night the associated cold front will cross the region.
250 AM PST Thu Nov 23 2017 High pressure aloft near the West Coast and very weak offshore flow will continue record setting heat today inland from the beaches.
708 AM EST Thu Nov 23 2017 High pressure will build across the area today allowing mostly sunny skies but cool temperatures. A very weak upper trof will move across the region tonight bringing some clouds and maybe a few flurries in the mountains.
No clouds expected other than cirrus spilling over Great Basin ridge. Light northwest surface winds will become light southwest late this afternoon as next lee-side trof sets up. A lee-side trough will strengthen some overnight into Friday morning ahead of another cold front which will move through the region Friday afternoon and evening.
Cool, dry air advecting into the forecast area in the wake of yesterday's trough passage has PW values down to 0. /NF/ Prior discussion below: Today through Tonight: Latest Rap and Satellite imagery showed an upper trough over the Mississippi Valley with high pressure over the Lower Mississippi Valley. For today into tonight the upper trough axis will push off to the east as upper ridging builds over the forecast area from the west. Lows for tonight with some additional radiational cooling, light winds and clear skies overnight lows will be from the lower to middle 30s. Strong upper ridging over the SW Conus and troughing over the eastern CONUS will result in upper NW flow over our region.
A mostly cloudy sky and south breeze held temperatures up mainly in the low 30s.
538 AM CST Thu Nov 23 2017 The main story for today will be warming temperatures in a developing southwesterly low level flow as strong low pressure begins to slide along the U. With 925 mb temperatures around 18 C in our southwest, looking at highs into the lower 70s through south central SD, then rapidly tapering downward to the north and east, with highs only in the upper 40s to lower 50s east of Interstate 29. The aforementioned low pressure continues to slide eastward on Friday, pulling a cold front through our area during the day.
Yet another day of challenging high temperatures with a combination of a cooler air mass moving in this afternoon and already fairly warm temperatures over the region. All of the ridge sites are warm and even Ashland is already at 63 degrees at 4 AM. Winds at a couple of thousand feet are near 30 kt and this should mix a warmer air mass aloft, with 925 MB temps of 17C, down before the cooler air mass moves in later today. Winds will be at advisory strength, mostly in the higher elevations of the east side with 700 MB winds around 50-55 kt. With the upper ridge pattern already transitioned to a zonal flow pattern this front will bring precipitation across the east side with the front dissipating over the east side into friday morning.
744 AM EST Thu Nov 23 2017 High pressure will build into the area bringing dry weather and temperatures very close to average for Thanksgiving today.
Upper ridge over the Rockies with strong chinook developing. Strongest winds expected around the Little Rockies which will produce their own downslope component so upgraded the High Wind Watch to a Warning. Ridge begins to rebound on Friday but continued pressure rises will keep winds strong enough for Lake Wind Advisory through the day.
Subsequent mostly clear conditions and low level southwesterly winds should result in a warmer day with temperatures peaking in the low to mid 40s. 925 mb temps suggest high temps in the lower to middle 40s today. For tnt, swly flow and warm advection will increase, as strong low pressure moves east across srn WI.
Upper high over the western U. ) Tonight, upper ridge flattens ahead of the next incoming system. Lee trough will deepen overnight in response to increasing winds aloft, and mountain top winds will become windy towards morning with gusts to between 40 and 50 mph above timberline towards 12z. At any rate, will breezy to windy conditions over and near the higher terrain early Friday morning, with quickly warming temperatures into the 60s and lower 70s expected across the plains through the late morning before the systems associated cold front brings in a cooler airmass within developing upslope flow through the afternoon. Warmest temps look to be across the southern I-25 corridor, with highs mainly in the 40s and 50s across the higher terrain.
A positively tilted mid/upper trough over the Gulf of Mexico will move slowly east and keep high moisture and large scale ascent over the area.
Indeed along the surface warm front over Marion County we have seen about 4 to 6 inches of rainfall with an Areal Flood Warning issued for that area. A few embedded strong to severe storms are possible especially along and near the warm front as it moves northward. Low pressure over the eastern Gulf of Mexico early this morning will move east-northeastward across north central Florida this afternoon, emerging into the Atlantic waters early this evening. This low pressure will then gradually strengthen as it accelerates northeastward off the southeastern seaboard. Our local pressure gradient will tighten quickly this morning as the low pressure center approaches the Florida Nature Coast, with northeasterly winds strengthening to Small Craft Advisory (SCA) levels of 20-25 knots by the late morning hours.
1035 AM EST Thu Nov 23 2017 High pressure will remain over the region through Friday.
Water vapor imagery depicted an approaching upper level low just northwest of Kansas City, moving southeast. Challenging forecast for Central Missouri today as the upper low approaches this morning. Freezing levels get down to about 400-500 feet with surface temps remaining near 34-35 therefore any accumulation would occur on grassy and elevated surfaces and likely would not last long given warm ground temps.
4 am temps were in the low to mid 30s over central IL and upper 30s to near 40F in the southern 6 counties of southeast IL. Highs in the lower 40s today with lows tonight in the upper 20s. As the upper level low tracks off the mid Atlantic coast Monday night, a 523 dm 500 mb low over north central Canada will drop SSE into the central Great Lakes by sunrise Tue. This will create a deep upper level trof over the eastern states, and bring even cooler temps over central/se IL.
611 AM CDT Sun Mar 11 2018 /12Z TAFS/ A cold front will be south of the I-10 corridor and southern terminals by 14Z. /issued 507 AM CDT Sun Mar 11 2018/ (Today and Tonight) A cold front will be south of our area by this morning. Behind the front, expect much cooler temperatures this afternoon and winds gusting from the north at 30 to 35 mph.
532 AM MDT Sun Mar 11 2018 High pressure will dominate the region today and tonight and provide mostly sunny skies and lighter wind speeds compared to yesterday. A weak upper level trof is expected to move through the northern sections of Wyoming and the Nebraska panhandle on Monday. If there is enough moisture present, it may be able to produce a quick snow shower in the afternoon in the higher elevations between Cheyenne and Rawlins with mainly flurries or sprinkles in the lower elevations.
Partial clearing will occur across most of the region today as a low pressure system moves away across Arizona.
First being any fog/mist/freezing drizzle or snow over the far south and southeast FA. Therefore there may be a little mist/fog/very light freezing drizzle around, but road temperatures seem to be hovering around the freezing point, so impacts seem to be minor.
As the trough pushes to the east, some subsidence could help decrease the coverage of convection as the morning continues. This cold front will pass through later on Monday and could produce strong to severe storms over portions of South Florida during the daytime hours.
In the wake of this disturbance, strong ridging aloft will develop across the Great Basin for the first half of the week. Farther north, the high clouds have thinned across the northern portions of the CWA so updated to have partly sunny skies mentioned rather than cloudy or mostly cloudy.
1043 AM EDT Sun Mar 11 2018 Low pressure over Newfoundland this morning will continue to shift east into the Canadian maritimes today with mountain snow showers continuing through mid-day before tapering off.
A cold front will approach the aerodromes this morning and sweep through during the afternoon hours.
Forecast largely on track with main tweaks being to increase cloud cover over far northeast Oklahoma and northwest Arkansas this afternoon and reduce high temperatures in the same areas due to the higher cloud cover. The data, namely the RAP/HRRR, is strongly suggestive of MVFR cigs dropping in from the north in the wake of the cold front across NW AR thru the day and possibly into the evening, so this forecast leaned more pessimistic this go around.
/issued 349 AM CDT Sun Mar 11 2018/ Early morning GOES East water vapor imagery showed an upper low centered between Omaha and Kansas City. This low will track southeast across MO today, reaching western KY by midevening and middle TN by early overnight. Moisture remains limited in the -12C to -18C dendritic layer and surface temps during this period should prevail at or above freezing.
/issued 524 AM CDT Sun Mar 11 2018/ Rather active weather to the north and northeast of the area early this morning as a cold front interacts with a strong disturbance aloft. The cold front, currently located from roughly central AR southwest to central TX, will continue to move southeast today, and is expected to reach our northern zones between 12-15Z. A period of dry and much cooler weather can be expected through the first half of the week.
This will continue until a cold front arrives later this morning. Dryline is drifting west from the I-35 corridor while a cold front is surging south from the I-20 corridor. Dryline will not drift much further to the west as the cold front enters our far northern areas around sunrise and exits our southern areas around midday.
Surface cooling will occur during this time, with the drop below freezing being critical as to how much snow can accumulate. Over the JKL forecast area, the precip which occurs after a drop below freezing is supportive of advisory criteria snow across all but the extreme northern and southern portions of the area. Toward the end of the event as moisture become more shallow, ice production aloft may be lost, and a bit of freezing drizzle or light freezing rain could result.
A cold front will pass across the near shore waters late tonight and Monday morning.
A quick moving area of low pressure is expected to sweep across Kentucky today. The low will also bring much more cloudiness today for Central Indiana. The low will depart to the east tonight as an associated cold front dives south across Indiana into the deep south.
1055 AM MDT Sun Mar 11 2018 High pressure will dominate the region today and tonight and provide mostly sunny skies and lighter wind speeds compared to yesterday. A weak upper level trof is expected to move through the northern sections of Wyoming and the Nebraska panhandle on Monday. If there is enough moisture present, it may be able to produce a quick snow shower in the afternoon in the higher elevations between Cheyenne and Rawlins with mainly flurries or sprinkles in the lower elevations.
Chattanooga Airport, TN 59 36 49 33 / 80 70 30 0 Knoxville McGhee Tyson Airport, TN 58 36 46 32 / 60 70 50 10 Oak Ridge, TN 57 35 47 31 / 60 80 40 10 Tri Cities Airport, TN 56 36 42 28 / 60 80 70 30 TN.
The low level ridge has shifted south of Cuba, lending to the gently veering southwesterlies sampled by this morning's sounding (see 12Z KKEY RAOB). The lowest layers are stable and dry, and resemble a post rain 'onion bulb' sounding. The profile this afternoon should be favorable for reverse cloud line genesis, if the lowest layers can recover some moisture. A weakened ridge axis will remain south of the Florida Keys this afternoon and tonight. A strengthening cold front will move southeast through the Gulf of Mexico Monday, and will push through the Florida Keys Monday evening.
Weak ridging aloft will build into the area today reducing cloud coverage and shower chances through Monday. A cooler and wetter than normal weather pattern will resume late Monday through the rest of the week as a series of storm systems moves over the region. A moist air mass continues to stream over the region this morning as a trough of low pressure over southeast California exits into the Desert Southwest. A warmer day looks likely today due to less cloudiness.
Cooler air will spread across western Kansas today as an area of high pressure at the surface builds into the Central Plains. Any lingering cloud cover early this morning will be giving way to clear skies by mid day as large scale subsidence develops behind an upper level trough that will be crossing eastern Kansas early this morning. Based on the 24 hour 1 to 3KM temperature trends from 00z Sunday to 00z Monday and clear skies this afternoon will be favor trending towards the slightly warmer MET and MAV guidance for highs today.
Weak s/w ridging will decrease the shower coverage this afternoon although that will be counteracted by marginal instability.
624 AM CDT Sun Mar 11 2018 Still dealing with some patchy fog/light freezing drizzle across the far eastern CWA this morning. Left the freezing drizzle mention in the forecast through 12Z and patchy fog through 18Z. Temperatures in the low 30s will certainly promote snow melt and with the high pressure center over the western half of South Dakota tonight there could be some fog development along and west of the Missouri River early Monday morning. North to northwest flow aloft and a decent snowpack will keep high temperatures cooler than average for the middle of March. However, as the ridge shifts east and builds over the Plains by late in the week, temps will begin to climb into the 40s and 50s, especially if more of the snowpack has melted by then.
The showers are associated with an upper trough, which will gradually shift eastward today. Upper ridge over the interior western US. Embedded short wave trough has produced clouds over our CWA this morning, and radar indicates sprinkles or flurries in eastern Oregon.
An upper level ridge will rebuild over Western Washington this afternoon and tonight. The ridge will shift east on Monday. In the lower levels, offshore flow will continue through Monday.
A cold front is currently extending across the Mid South into the Mississippi Delta Region with some convection ahead of the front stretching across southern Alabama into central Georgia moving eastward this late morning. The cold front will translate eastward this late afternoon into eastern MS and western Alamaba. The lower part of the atmosphere is expected to prime through the day with PWATS increasing between 1. Low pressure will move eastward across the southeastern states this afternoon and tonight, emerging off the Georgia and South Carolina coast by sunrise on Monday. This feature will drag a cold front across our local waters during the early morning hours on Monday.
835 AM CDT Sun Mar 11 2018 In addition to updates to the hourly T/Td grids to account for the approaching cold front (currently entering the northern CWA border), opted to increase wind gust potential due to upstream obs showing 30-40 mph gusts. This will continue until a cold front arrives later this morning. Dryline is drifting west from the I-35 corridor while a cold front is surging south from the I-20 corridor. Dryline will not drift much further to the west as the cold front enters our far northern areas around sunrise and exits our southern areas around midday.
957 AM MDT Sun Mar 11 2018 High pressure continues to bring lots of sunshine and lighter winds to the forecast area. Cirrus shield to our southwest is eroding nicely as it enters the upper level ridge axis. Short wave ridging will move across Colorado today. Airmass behind yesterday's cold front will be a little cooler with highs slightly below normal. A short wave trough moves into Wyoming tonight.
A cold front moving South across the area during the day will be shifting the Southerly winds of 5-10 knots to the North 15-20 knots with higher gusts to 23-27 knots.
An inverted trough of low pressure will move through the Northland today. A more potent trough will dive southward from northern Canada and nose into northeast Minnesota late this afternoon. Highs for Monday dip a few degrees cooler with readings in the low to middle 30s.