Aikyam-Lab/Synoptic-Bench huggingface dataset:
Recent water vapor imagery showing the mean trough axis from the Great Lakes into north Texas with a compact wave digging behind across northern North Dakota.
This all ahead of a positively tilted trough axis that extends from the Great Lakes, through the southern Plains, and back southwest to near Baja. There is a tightly wound low pressure area off the Pacific NW coastline, headed south along the West Coast.
/issued 322 AM CST Fri Feb 18 2022/ Quiescent weather is expected today as the mid/upper-level troughing attenuates from the departing jet streak over the southeastern U. At the surface, the 1030 mb anticyclone will continue to expand as it drifts eastward into the ARKLATEX region. Winds will gradually transition to the southwest later this morning, remaining light (around 10 mph or less) by this afternoon as the mean flow aloft continues to de-amplify amidst diffuse surface lee troughing.
619 AM EST Fri Feb 18 2022 High pressure and a drier airmass will build into the Ohio Valley through this afternoon. An upper level disturbance will bring the chance for a few snow showers tonight before high pressure and dry weather return on Saturday. We are also seeing a bit of a fetch off of Lake Michigan but this should cut off through the day as the low level flow begins to back around a bit more to the west. Highs on Saturday will again be cool, with afternoon highs ranging from only the lower 20s across the northwest to the low to mid 30s in the south. High pressure will work to the east of the region Saturday night.
503 AM CST Fri Feb 18 2022 Breezy southwest winds will develop across central IL today, before switching northwest behind a dry cold frontal passage tonight. 08z surface map placed a high pressure ridge from the central Plains up through the western Great Lakes. The light winds will be short lived as the ridge quickly sinks southeast this morning and the next cold front drops into the upper Midwest. The cold front crosses the region during the evening, veering winds northwest with similar gusts for continued drifting snow into the overnight hours. Colder weather is forecast Saturday as Arctic high pressure shifts overhead by afternoon. Lighter winds will be accompanied by highs several degrees below normal in the low/mid 20s for snow covered areas, to lower 30s farther south.
507 AM CST Fri Feb 18 2022 MVFR CIGS continue across most terminals expect KBPT as strato cu continue to wrap in in the wake of the cold front.
Pierce are on the high end of that range, and the current forecast is for afternoon temps to be just short (1-2 degrees) of those values. A weak cold front will cross the area tonight, bringing a few showers.
Winds increase slightly ahead of the next cold front which moves to near Interstate 40 by sunrise Saturday.
Saturday's weather will be benign with a modest layer of mid- level moisture maintaining a mostly cloudy sky with some lower clouds increasing especially over the Lower RGV and coastal areas as surface winds turns east allowing for Gulf moisture and limited warm air advection to return.
(This afternoon through Saturday night) A broad upper trough is over most of the country.
Progressive west/northwest flow continues in upper levels as a cold front pushes south this evening.
As a result, temperatures have struggled to climb above the lower 40s, despite the sunshine. High pressure will become centered across the Ohio Valley on Saturday, promoting a clear and sunny day. Surface winds will be light and still out the north, but ample sunshine (and the higher sun angle here in late February) should help temperatures recover nicely well into the 50s by the afternoon -- helping to take away from the chill we experience today.
Afternoon highs will be a few degrees warmer today.
1251 PM PST Fri Feb 18 2022 High pressure brings dry and mild conditions with mainly light winds into the start of the weekend.
Expect much colder temperatures with a return of winter weather to the high country. A sunny and warmer day is underway across northern Arizona as large-scale high pressure continues to dominate the weather pattern across the west. On Saturday, light winds will become more variable in direction while daytime temperatures continue their upward trend reaching about 5 degrees warmer than today.
Really not a whole lot to talk about this weekend as the upper-level trough that brought yesterday's weather will continue its track eastward, allowing temps to slowly recover each day this weekend.
Think the dense cloud cover this morning and breezy northerly flow will make it difficult for temperatures to climb much above the 40 degree mark, especially across the higher terrain of the Plateau. High pressure will build over the Midwest and Mid-Atlantic coast over the weekend, keeping a dry forecast in place. Low temperatures will drop into the 20s by Saturday morning, so remember to bundle up if heading outdoors! Temperatures will rise into the lower 50s by Saturday afternoon under sunny skies and northerly winds.
Surface analysis late this morning places a 1032 mb ridge of high pressure over the Lower Mississippi Valley and Southern Plains. /issued 350 AM CST Fri Feb 18 2022/ The cold front that brought yesterday's widespread rainfall to the Mid-South has moved well to the east of the area. The upper-level trough has maintained a strong positive tilt, with the trough axis still to our west, extending from the OH valley back to west TX. As the anticyclone settles over the area tonight, winds will become light and the dry air mass will allow temperatures to fall to 25-30F in most areas.
An upper trof with a significant positive tilt stretching from the eastern CONUS to northern Mexico evolves into a more meridionally oriented trof over the eastern states tonight. The upper trof then begins to progress off into the western Atlantic on Saturday leaving a zonal flow pattern over the forecast area. Highs on Saturday range from the upper 50s well inland to the lower 60s elsewhere.
- Temperatures will be chilly Saturday, morning lows in the teens and near 20 and highs in the lower 30s.
1101 AM EST Fri Feb 18 2022 A cold front moves across the region this morning with a few light snow showers in its wake.
1214 PM EST Fri Feb 18 2022 Friday and Saturday will be much cooler. Light snow will be possible on Saturday, especially for the I-80 corridor and the higher elevations of the Alleghenies.
(This evening through Saturday) A back-door cold front will move into the area from the northeast before sunrise Saturday morning. And given the temperatures, it would be freezing fog. Although this cold front will bringing slightly cooler low-level air into the area, this shallow cooler airmass will mix out across most of the area tomorrow afternoon allowing high temperatures to be warmer than today.
Full Discussion: At 20Z this afternoon, conditions varied greatly across the CWA with cool temperatures in east-central KS and noticeably warmer temperatures in central and north-central KS. Late this evening and early tonight, a cold front will move southward across the area. No precip is expected but cooler weather is anticipated tomorrow afternoon, especially in those locations experiencing the 50s today.
1128 AM EST Fri Feb 18 2022 A cold front moves across the region this morning with a few light snow showers in its wake.
The air felt and looked almost soupy this morning, thanks to southeasterly winds ushering in lower-level moisture that helped dewpoints climb into the lower 70s. 54 inches, with most of the moisture confined in the lower levels. High pressure is residing over our area and allowing for a beautiful day to shape up across the Florida Keys, with negligible rain chances and light winds out of the southeast expected to continue through the afternoon. Temperatures will reach near 80 degrees into the lower 80s. From synopsis, A sprawling area of high pressure located in the central North Atlantic will continue to push eastward this afternoon. In its wake, another dome of high pressure will build across the Southeast and then slowly slide offshore of the East Coast.
SR Chattanooga Airport, TN 27 54 28 58 40 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 26 50 25 58 35 / 0 0 0 0 0 Oak Ridge, TN 26 50 25 57 34 / 0 0 0 0 0 Tri Cities Airport, TN 24 46 21 55 30 / 0 0 0 0 0.
1145 AM CST Fri Feb 18 2022 An arctic cold front near the Canadian border north of MT and ND this morning will back into Pine Ridge and ncntl Nebraska late this afternoon and retreat east Saturday afternoon. The HREF, RAP and HRRR suggest moisture convergence around the Black Hills will set off isolated showers across Pine Ridge this evening and a low POP is in place across that area. The temperature forecast today and Saturday leans toward the 75 percentile of the NBM but is marked down a few degrees for the cold front this afternoon and mid and high level cloud cover which could affect the heating cycle across wrn and ncntl Nebraska today and Saturday.
(Tonight) Temperatures are forecast to be much warmer tonight than the low temperatures recorded across the area this morning even with a cold front dipping into northeast Oklahoma and northwest Arkansas by sunrise.
112 PM EST Fri Feb 18 2022 High pressure will build into the area through tonight. A dry secondary cold front move through the area Saturday afternoon.
Not as cold tonight as last night, with most locations holding in the lower 20s sunrise Saturday. Midlevel flow trends zonal Saturday, which in turn will strengthen the leeside trough across eastern Colorado. Full sunshine and 0% sky grids continue Saturday, with afternoon temperatures ranging from near 50 southeast to the lower 60s southwest.
With dewpoints in the lower 70s and light winds, it has turned out to be quite a muggy day for mid-February. Surface analysis shows high pressure extending across the southern half of Florida ahead of an approaching surface front currently draped across the Florida Panhandle. High pressure will build in behind this front and winds will increase, starting Saturday night, as the gradient tightens.
245 PM EST Fri Feb 18 2022 High pressure will build into the area through tonight. A dry secondary cold front move through the area Saturday afternoon.
/issued 507 AM CST Fri Feb 18 2022/ MVFR CIGS continue across most terminals expect KBPT as strato cu continue to wrap in in the wake of the cold front.
Today, we are in the 40s, some 30 to 35 degrees cooler than 24 hours ago, with plenty of sunshine but a northerly wind that keeps conditions feeling cooler too.
1236 PM EST Fri Feb 18 2022 High pressure and a drier airmass will build into the Ohio Valley through this afternoon. An upper level disturbance will bring the chance for a few snow showers tonight before high pressure and dry weather return on Saturday. Highs on Saturday will again be cool, with afternoon highs ranging from only the lower 20s across the northwest to the low to mid 30s in the south. High pressure will work to the east of the region Saturday night.
236 PM CST Fri Feb 18 2022 Strong southwest winds with gusts up to 40 mph will turn northwest this evening as a cold front moves through.
Saturday will be milder with plenty of sunshine still, and should push towards the warmer side of guidance.
As upper-level troughing moving through the Great Lakes region traverses eastward our flow will transition from southwest to more of a zonal flow. Overnight temperatures will fall to near or just above freezing as nocturnal cooling is maximized.
Additionally, some locally breezy east/northwest winds can be expected in/around the usual wind-prone gaps and ridgetops of the Sierra Nevada tonight and Saturday morning.
Usually when we're talking about quiet weather, we have ridging overhead, but that's not the case in the mid and upper-levels right now. A trough remains just to our north/northwest today with energy stretched across Central Texas. With more clouds tonight and winds shifting more northeast, temperatures tonight will be a bit warmer than last night, mainly in the 40s.
Significant warming has occurred today in the wake of southwesterly surface winds and low-level temperature advection, as a cold front and cloud cover approach the area from the north for the evening. This system is dragging along the aforementioned cold front to the north, with the eventual passage of the front bring with it increased cloud cover and a low-end (less than 20 %) chance at some kind of light precipitation across portions of western Iowa in the form of light rain.
Surface analysis this afternoon places a 1029 mb ridge of high pressure over the Lower Mississippi Valley and Southern Plains.
/Tonight through Saturday Night/ An elongated upper trough axis is slowly moving east-southeast across the area today allowing the flow aloft to become more northwesterly. Below freezing temperatures are expected in most locations tonight.
517 PM CST Fri Feb 18 2022 (Tonight) Temperatures are forecast to be much warmer tonight than the low temperatures recorded across the area this morning even with a cold front dipping into northeast Oklahoma and northwest Arkansas by sunrise.
Dry cold front will move into the region on Saturday.
240 PM MST Fri Feb 18 2022 There is still some cloudiness and a few light snow showers over the high mountains this afternoon. This brought temperatures down a bit the last couple hours with the cooler air moving in off the snow field covering some of the plains. The low level winds should adhere to normal drainage patterns overnight, with a southwesterly direction to dominate for Saturday's surface winds. For temperatures, Saturday highs look 3-6 C warmer than today's highs.
Attendant strong cold front will cross late evening into early morning with a burst of snow. Otherwise strong post frontal cold advection will deepen lake aggregate thermal trough with some lake effect late tonight-into early Sat morning far n/nw. Arctic ridge shifts rapidly ewd Sat night with strong warm advection spreading in Sun with a strong rebound in temps with highs 40 or better for most. Moderating temps continue through Tue as thermal ridge peaks downstream of renewed deep wrn troughing.
Early this morning, warm temperatures above freezing allowed for precipitation to start as rain, then a decent cold front from the north steadily dropped temperatures throughout the day, changing the precipitation over to snow and freezing the wet surface underneath. High temperatures today will probably hover in the mid teens before the low temperatures tonight drop into the lower teens. Overnight, a sudden shift in the winds from the south will bring warmer temperatures from the south for thawing high temperatures pushing 50 degrees.
529 PM CST Fri Feb 18 2022 Strong southwest winds with gusts up to 40 mph will turn northwest this evening as a cold front moves through.
312 PM CST Fri Feb 18 2022 Winds and blowing snow impacts will quickly come to an end this evening as high pressure builds into the forecast area. This, along upper level ridging building in aloft, will allow temperatures to quickly warm to the lower 50s southwest to near freezing northeast by Saturday afternoon. It is possible that near advisory criteria winds will develop across the James River Valley tomorrow, but warmer air aloft should limit or prevent mixing of higher gusts to the surface.
High pressure remains in control of local weather today. Temperatures in the Magic Valley and lower Snake have climbed into the lower 40s with some localized downslope influence. Temps remain a bit cooler though as you head into the Upper Snake where a bit more clouds are in place. Saturday looks pleasant for much of the area with ample sunshine and warmer temperatures than today. Get out and enjoy the sunshine and warmer temps because it will be very short-lived.
Winds and blowing snow impacts will quickly come to an end this evening as high pressure builds into the forecast area. This, along upper level ridging building in aloft, will allow temperatures to quickly warm to the lower 50s southwest to near freezing northeast by Saturday afternoon. It is possible that near advisory criteria winds will develop across the James River Valley tomorrow, but warmer air aloft should limit or prevent mixing of higher gusts to the surface.
The showers are coinciding with gusty northwest winds, gusting into the 40 to 50 mph range behind a cold front. Temperatures will once again be above mid-February normals, ranging from the mid-30s across the Buffalo Ridge to the lower to mid 50s across south-central SD.
With the warmer temperatures, the RH values are expected to trend drier for Saturday afternoon. Despite winds staying on the lighter side, elevated fire weather concerns again exist for Saturday afternoon with the combination of the dry fuels and the lower humidity values.
301 PM MST Fri Feb 18 2022 Combination of lift from a jet and frontogenesis along a cold front that was located against the foothills, has kept light snow going over much of the area this afternoon.
736 PM CST Fri Feb 18 2022 Strong southwest winds with gusts up to 40 mph will turn northwest this evening as a cold front moves through.
436 PM MST Fri Feb 18 2022 There is still some cloudiness and a few light snow showers over the high mountains this afternoon. This brought temperatures down a bit the last couple hours with the cooler air moving in off the snow field covering some of the plains. The low level winds should adhere to normal drainage patterns overnight, with a southwesterly direction to dominate for Saturday's surface winds. For temperatures, Saturday highs look 3-6 C warmer than today's highs.
High pressure will become centered across the Ohio Valley on Saturday, promoting a clear and sunny day. Surface winds will be light and still out the north, but ample sunshine (and the higher sun angle here in late February) should help temperatures recover nicely well into the 50s by the afternoon -- helping to take away from the chill we experience today.
During the afternoon Saturday a dry cold front will increase winds again from the north to northwest with gusts to about 20 Knots.
High clouds streaming in from the southwest may prevent ideal radiational cooling conditions although the entire area is expected to fall into the low to mid 30s tonight.
1103 PM MST Fri Feb 18 2022 Satellite shows a thin layer of clouds trapped in the high country, and a few flurries still noted. Temperatures will continue to moderate with lee troughing, warm advection, and downslope flow through Saturday. Highs should be able to reach the upper 50s over the plains, except slightly cooler around Fort Collins and Greeley where inversions run a bit deeper. There is still some cloudiness and a few light snow showers over the high mountains this afternoon. This brought temperatures down a bit the last couple hours with the cooler air moving in off the snow field covering some of the plains. The low level winds should adhere to normal drainage patterns overnight, with a southwesterly direction to dominate for Saturday's surface winds. For temperatures, Saturday highs look 3-6 C warmer than today's highs.
TWH Combination of lift from a jet and frontogenesis along a cold front that was located against the foothills, has kept light snow going over much of the area this afternoon.
844 PM MST Fri Feb 18 2022 Satellite shows a thin layer of clouds trapped in the high country, and a few flurries still noted. Temperatures will continue to moderate with lee troughing, warm advection, and downslope flow through Saturday. Highs should be able to reach the upper 50s over the plains, except slightly cooler around Fort Collins and Greeley where inversions run a bit deeper. There is still some cloudiness and a few light snow showers over the high mountains this afternoon. This brought temperatures down a bit the last couple hours with the cooler air moving in off the snow field covering some of the plains. The low level winds should adhere to normal drainage patterns overnight, with a southwesterly direction to dominate for Saturday's surface winds. For temperatures, Saturday highs look 3-6 C warmer than today's highs.
(Today and tonight) High pressure is once again the dominant feature this morning across the heart of Texas, resulting in light winds and cold temperatures. As the day progresses, however, this high pressure will shift eastward and merge with a stronger high over the Mississippi Valley.
High pressure building in from the west will bring lighter winds to the area this afternoon.
Subsidence has allowed for notably cold temperatures this morning with high pressure approaching the region today.
A chilly night is underway with clear skies and diminishing wind allowing temperatures to fall below freezing in some of the more sheltered areas. Today, we are in the 40s, some 30 to 35 degrees cooler than 24 hours ago, with plenty of sunshine but a northerly wind that keeps conditions feeling cooler too.
The Evening Update: Upper low off the CA coast will continue to drop Swd to off the coast of Baja by early Sun. About 3-5 deg C cooling at 850 mbs on Sun could correlate to max temps some 5-10 deg F cooler than Sat. Additionally, some locally breezy east/northwest winds can be expected in/around the usual wind-prone gaps and ridgetops of the Sierra Nevada tonight and Saturday morning.
Breezy northerly winds will usher in a much drier airmass behind a cold front today.
Dry weather, cooler temperatures, and clearing skies will build in over the course of the day as cold air advecting into the region from out of the northwest establishes high pressure conditions for Saturday. High temperatures for today will reach up into the 60s and lower 70s, with warmer temps occuring further to the south.
1018 PM PST Fri Feb 18 2022 The passage of a cold front on Saturday will bring rain and snow to the mountains of the Idaho Panhandle and the Cascades.
As of 3 AM, the surface cold front was sagging south across northern Lake/Volusia Cos. Cold front still likely to be in or near Osceola/ Brevard Counties by sunrise, with morning fog to the south. Much cooler maxes, ranging from U60s- L70s north to U70s far south. Min temps will be a few degrees warmer along the immediate coast as winds try to veer onshore overnight, though N-NW drainage flow will likely prevail over all but the barrier islands and along the ICW.
357 AM EST Sat Feb 19 2022 A dry secondary cold front will move through the area this afternoon.
A rather tight pressure gradient develops tonight from the Great Lakes into the southern Plains as low pressure advances east across the northern Plains.
Dry cold front will move into the area on Saturday. Dry cold front will move into the region on Saturday.
/NF/ A chilly night is underway with clear skies and diminishing wind allowing temperatures to fall below freezing in some of the more sheltered areas. Today, we are in the 40s, some 30 to 35 degrees cooler than 24 hours ago, with plenty of sunshine but a northerly wind that keeps conditions feeling cooler too.
Attendant strong cold front will cross late evening into early morning with a burst of snow. Otherwise strong post frontal cold advection will deepen lake aggregate thermal trough with some lake effect late tonight-into early Sat morning far n/nw. Arctic ridge shifts rapidly ewd Sat night with strong warm advection spreading in Sun with a strong rebound in temps with highs 40 or better for most. Moderating temps continue through Tue as thermal ridge peaks downstream of renewed deep wrn troughing. Decaying snowband associated with a strong cold front is approaching KSBN and could offer a brief reduction in visibilites to 2SM.
Warmer air ahead of the front will keep afternoon highs mainly in the 80s. Models push the cold front into the Florida Keys by Sunday Morning, and followed by colder/drier air advection. The cooler airmass will keep afternoon highs mostly in the upper 70s.
625 AM EST Sat Feb 19 2022 A dry cold front will move through the area this afternoon.
229 AM MST Sat Feb 19 2022 A brief and significant warm up is expected today as a warm front moves east across the region this morning. Cold front drop south tonight and Sunday morning with a band of precipitation that will start as light rain in the north this evening and change to snow late tonight.