Aikyam-Lab/Synoptic-Bench huggingface dataset:
The short term forecast remains essentially unchanged, with possible rain and much cooler temperatures the main highlights. At the surface, winds will continue, from the northeast, and temperatures will remain on the cool side of seasonal normals, especially highs today, which may be around 15 degrees cooler than normal.
Temperatures are a little warmer than previously expected and should remain above freezing so no wintry precipitation should fall anywhere in our CWA. The rain will move east later today as a strong upper level low moves into North Texas and clearing skies tonight will allow temps to drop to near freezing across much of the area with mid to high 30s holding in the eastern Permian Basin, Trans Pecos, and Rio Grande valley. This will begin a long stretch of mornings where low temperatures are expected to reach freezing for much of the area as a highly amplified ridge develops over the western U.
559 AM CST Sat Nov 28 2020 Today, maximum temperatures should be in the low to mid 40s across much of our area, with the warmest temperatures in our southern counties. Sunday, a low pressure system is expected to bring snow showers to the Northland, mainly in the Arrowhead and along the south shore of Lake Superior. This upper level ridge is expected to bring warmer maximum temperatures today. These temperatures are expected to mix down to the surface, raising highs into the low to mid 40s. These mild temperatures won't last long as a deepening trough in Canada moves through southern Ontario. A cold front will move through the Northland and lower temperatures back into the 30s for Sunday, and could potentially bring snow showers as well.
Increasing cloudiness can be expected tonight as the cut-off upper level low now over NM shifts eastward into the Southern Plains. Light rain will spread into parts of central and southeast MO Sunday afternoon as upper level divergence increases over the area ahead of the upper level low as it opens up and moves eastward into AR. At the same time a northern stream upper level trough will deepen as it moves eastward into the Great Lakes region and sends a strong cold front southeastward through our forecast area Sunday afternoon and evening.
An accompanied cold front will also arrive early Sunday morning and will turn the wind around to the northwest through the rest of the day. Behind this front, temperatures will feel significantly cooler and will only top out near 40 degrees for most (near to slightly below normal).
557 AM EST Sat Nov 28 2020 VFR conditions with mainly clear skies are expected this forecast as high pressure remains positioned to the south. Gradient flow around the periphery of this high will lead to persistent southwest flow into tonight with speeds peaking 10-15 knots this afternoon with some higher gusts, especially KMBS. Minimal weather to discuss this weekend with high pressure overhead keeping conditions sunny with slightly above average temperatures.
925 AM EST Sat Nov 28 2020 High pressure will extend across the area through the weekend.
02Z water vapor imagery showed a cutoff upper low over NM. At the surface, weak high pressure was centered over southern KS with the better surface moisture shunted south along the gulf coast. Tonight should see increasing high clouds as the upper low over NM moves out across OK and northern TX. But it will hing on enough moisture lifting north of the upper low and the operational consensus is to keep any QPF just south of the forecast area. Lows tonight should be a little more mild ranging from the lower 30s north to the middle 30s south.
402 AM CST Sat Nov 28 2020 Today, maximum temperatures should be in the low to mid 40s across much of our area, with the warmest temperatures in our southern counties. Sunday, a low pressure system is expected to bring snow showers to the Northland, mainly in the Arrowhead and along the south shore of Lake Superior. This upper level ridge is expected to bring warmer maximum temperatures today. These temperatures are expected to mix down to the surface, raising highs into the low to mid 40s. These mild temperatures won't last long as a deepening trough in Canada moves through southern Ontario. A cold front will move through the Northland and lower temperatures back into the 30s for Sunday, and could potentially bring snow showers as well.
The large scale pattern over the region has some slight ridging over the American west currently. The first system will move through this morning and is a weakening cold front that will die out over the northern Rockies this afternoon.
An upper level low centered in New Mexico will move east into the Texas and Oklahoma panhandles throughout the day today. As the low drifts east tonight areas from St. As the upper low from Saturday departs on Sunday an arctic front will move through western Kansas and increase the winds shortly after sunrise. Overnight lows Sunday should easily fall into the teens as an area of high pressure moves in during the night to decrease the winds to go along with a cold and dry airmass to have efficient radiational cooling.
Unsettled weather conditions with veering winds will occur during the TAF period as a cold front moves from west to east across Deep South Texas and the Rio Grande Valley. /issued 335 AM CST Sat Nov 28 2020/ SHORT TERM (Now through Sunday): A cold front is expected to pass from west to east through Deep South Texas and the Rio Grande Valley. The best chance for showers and thunderstorms will occur today and tonight in association with the passage of the front, with the precipitation confined to the lower Texas coastal waters on Sunday as the front pushes farther offshore. While above normal temperatures are still anticipated today, cooler temperatures will occur tonight and tomorrow in the wake of the front.
527 AM CST Sat Nov 28 2020 Low impacts this weekend with little to no precip as a cold front pushes across the area tonight. Overnight a clipper will move along the International border and bring a cold front to the area with winds turning to the NW. Much cooler temps are expected Sunday with the blyr cold advection holding temps in the 20s for the daytime period Sunday with breezy conditions expected as sustained winds persist in the 20 to 25mph range.
Northwest flow is in place at all levels this morning with the upper trough axis shifting east of the area.
A weak area of high pressure will lie across the region this weekend. Gusty north winds will linger within the lower Colorado River. Through Sunday Night Broad, flat mid-level ridge will lie over the Great Basin and Mojave Desert through the weekend. All models do show a weak mid-level disturbance passing under the ridge with little fanfare across northwest Mexico Sunday. Won't be surprised to see a few spots briefly touch freezing around sunrise. Just outside the valley, sub-freezing temperatures already noted at Red Rock Canyon and Blue Diamond. At the surface, persistent area of high pressure over the northern Great Basin will continue to drive north wind gusts of 25 to 35 mph down the lower Colorado River today and Sunday.
A clipper system and associated cold front will move through the region late tonight into Sunday morning. The low will track well north of the region, so widespread precipitation is not anticipated. Highs on Sunday should range from the middle 30s northwest to the lower to middle 40s southeast.
With the ridge axis generally SW to NE across SE KS to E Missouri the calmest conditions will likely be coming to an end and light west southwest winds will start to pick up as the surface pressure gradient tightens across the area. Also before sunrise, while the lightest winds remain in place, expect some patchy fog in the low lying areas, such as river valleys and well-established creeks. Temperatures today will continue the stretch of semi- comfortable, however with generally light winds and ample sunshine even the lower to middle 50s may feel decent. The upstream ridging across the eastern Pacific and western US will help funnel more troughing into the area, resulting in a nearly persistent quasi-meridional northerly flow aloft pattern.
WAA associated with a thermal ridge ahead of the front will bring maximum 850 mb temperatures to 9 to 10 degrees Celsius. Cloudless skies combined with the thermal ridge will keep high temperatures in the upper 50s to low 60s across the region, 10 to 15 degrees above normal. The cold front will begin to impact the region around 06Z Sunday as it enters Nebraska from the north northwest. The cool temperatures during the day and clear overnight skies will lead to temperatures in the low teens across western and north central Nebraska on Sunday night.
542 AM EST Sat Nov 28 2020 A cold front will push southeast across the region this morning, then high pressure will build into Pennsylvania the rest of the weekend.
326 AM CST Sat Nov 28 2020 Low impacts this weekend with little to no precip as a cold front pushes across the area tonight. Overnight a clipper will move along the International border and bring a cold front to the area with winds turning to the NW. Much cooler temps are expected Sunday with the blyr cold advection holding temps in the 20s for the daytime period Sunday with breezy conditions expected as sustained winds persist in the 20 to 25mph range.
519 AM CST Sat Nov 28 2020 Early This Morning: Persistent light southwesterly winds are holding overnight low temperatures in the lower 30s, with more sheltered valley regions dropping into the 20s. Warmer air has continued to advect eastward tonight and by 12Z, we'll likely see 925 mb temperatures moving past the 90th moving average and towards the max temperature running average. Barring any impact from high lvl cirrus this afternoon, have trended temperatures towards (and above in some areas) the highest model numbers which would result in 50s and even 60s. Temperatures struggle to climb much beyond freezing in the afternoon with wind chills in the teens to lower 20s.
414 AM EST Sat Nov 28 2020 High pressure will extend across the area through the weekend.
527 AM CST Sat Nov 28 2020 Clouds will increase, especially across southern Kansas, later today in advance of the southern stream upper low which will move out across the southern high Plains. Modest elevated moisture transport and mid-level convergence north of the low will affect the Oklahoma border region of southern Kansas with some very light precip possible. The surface cold front associated with the northern stream upper trof moving across the northern Plains/Upper Midwest will drop south across the area during Sunday.
As a dry cold front swings south and through the area early this afternoon, winds near these foothills will decrease dramatically, though in its place will be northwest winds gusting to 30 mph across all of southeastern Montana.
Otherwise, high pressure across the western CONUS remains the main story through the short term as the closed low over New Mexico slowly moves east and away from our region. The period will start out dry and seasonably cool with an upper level ridge dampening out into northwest flow ahead of an upper level trough moving across the Pac NW.
At the sfc, a weak lee trough will be in place along the front range. For tonight, an upper level trough will move across the nrn plains. This will allow for a cold front to move across nern CO after midnight. The cold front will keep cold air across the area tomorrow. Highs during the day Sunday will be 10-15 degrees cooler across the plains, and at least a few degrees cooler across the mountains and high valleys.
638 AM EST Sat Nov 28 2020 High pressure will extend across the area through the weekend.
SHORT TERM (Now through Sunday): A cold front is expected to pass from west to east through Deep South Texas and the Rio Grande Valley. The best chance for showers and thunderstorms will occur today and tonight in association with the passage of the front, with the precipitation confined to the lower Texas coastal waters on Sunday as the front pushes farther offshore. While above normal temperatures are still anticipated today, cooler temperatures will occur tonight and tomorrow in the wake of the front.
451 AM EST Sat Nov 28 2020 A cold front will push southeast across the region this morning, then high pressure will build into Pennsylvania the rest of the weekend.
Otherwise, a dry cold front is forecast to push southeast across the area later today into tonight, which will lead to much cooler temperatures for Sunday.
234 AM MST Sat Nov 28 2020 A cold front will move through the area in the late morning and early afternoon. High pressure will move in tonight diminishing the winds under mostly clear to partly cloudy skies. Cooler temperatures will prevail on Sunday with high pressure over the area.
It appears that low-level wet-bulb temperatures will remain slightly above freezing there, so the forecast simply calls for rain.
524 AM CST Sat Nov 28 2020 The main forecast foci are the cold frontal passage late tonight and the midweek brief cool down. Changes occur tonight, between midnight and sunrise Sunday, during which time a strong cold front will plow across the area. The main impacts of the front will be strong winds, gusting to 40 mph Sunday morning and early afternoon, and much cooler temperatures.
/issued 241 AM CST Sat Nov 28 2020/ Skies are mostly clear across the Mid-South early this morning with temperatures ranging from the lower 40s to mid 50s. High pressure was currently centered over south central Kansas. Temperatures will be cooler than normal with highs mainly in the 50s. By tonight, low pressure will develop over south Texas and will reach southwest Louisiana by Sunday morning. As the low gets closer to the region, rain will move into southwest sections of the Mid-South by early Sunday morning. The low will bring widespread rain to the Mid-South.
Low impacts this weekend with little to no precip as a cold front pushes across the area tonight. Overnight a clipper will move along the International border and bring a cold front to the area with winds turning to the NW. Much cooler temps are expected Sunday with the blyr cold advection holding temps in the 20s for the daytime period Sunday with breezy conditions expected as sustained winds persist in the 20 to 25mph range.
105 PM EST Sat Nov 28 2020 A cold front will push southeast across the region this morning, then high pressure will build into Pennsylvania the rest of the weekend.
A cold front will slide through the area tonight, with winds beginning to pick up out of the northwest after 06Z. With the passage of the cold front, highs on Sunday will only be in the 30s.
Patches of stratocumulus and drizzly showers are just south of the Lower Keys, although fewer patches than yesterday. The forecast calls for near nil rain chances with highs in the lower 80s.
1040 AM CST Sat Nov 28 2020 High clouds spreading across ern OK and nwrn AR this morning ahead of upper low over ern NM.
Precipitation will increase further after midnight as an upper level low and trailing cold front begin to approach from the west. Meanwhile sfc obs show low pressure developing over Deep South Texas which will add to the precip coverage/intensity later tonight.
1144 AM CST Sat Nov 28 2020 Rain probabilities were increased for this evening and overnight, with light rain likely over much of Oklahoma as upper low moves over the region. It appears that low-level wet-bulb temperatures will remain slightly above freezing there, so the forecast simply calls for rain.
Rain develops from the west into ern OK sites after 03z, and into nwrn AR sites after 09z, as ern NM upper low translates eastward toward the area. /Issued 1040 AM CST Sat Nov 28 2020/ High clouds spreading across ern OK and nwrn AR this morning ahead of upper low over ern NM.
The clipper system and potent but dry cold front will reach the northwest part of the CWA by mid morning, near the Mississippi River around noon, then exit the CWA by late afternoon.
341 PM EST Sat Nov 28 2020 Water vapor imagery highlights a potent southern stream cyclone lumbering east across North Texas. Temperatures hit the lower 80s for most island communities with dewpoints from 65 to 70. Cyclogenesis will begin tonight across the northwestern Gulf of Mexico as the Texas cyclone opens and phases with the northern stream.
The rest of going forecast looks to be on track with maximum temperatures cooler today around 50 degrees. Northwest flow is in place at all levels this morning with the upper trough axis shifting east of the area.
247 PM CST Sat Nov 28 2020 A dense patch of cirrus is beginning to overspread the Tennessee Valley this afternoon as a developing low pressure system over the Southern Plains begins to take shape. The aforementioned low pressure system will continue east from the Southern Plains overnight into the lower Mississippi Valley by Sunday morning. The fast pace of this now upper-trough will then result in the heaviest precipitation tapering off from west to east after Midnight.
A cold front making its way into Deep South Texas will continue to keep conditions unsettled. Unsettled weather conditions with veering winds will occur during the TAF period as a cold front moves from west to east across Deep South Texas and the Rio Grande Valley. /issued 335 AM CST Sat Nov 28 2020/ SHORT TERM (Now through Sunday): A cold front is expected to pass from west to east through Deep South Texas and the Rio Grande Valley. The best chance for showers and thunderstorms will occur today and tonight in association with the passage of the front, with the precipitation confined to the lower Texas coastal waters on Sunday as the front pushes farther offshore. While above normal temperatures are still anticipated today, cooler temperatures will occur tonight and tomorrow in the wake of the front.
Pretty quiet for most of this forecast until later on Sunday when a cold front comes through and some rain/snow break out behind it with some lake enhancement. Upper level trough with axis extending from around the Hudson Bay down to the Dakotas Sunday morning with swing east though the day, phasing with an upper level low over Oklahoma.
Highs in the low/mid 50's to low 60's are on track for today. BW Chattanooga Airport, TN 62 40 61 41 45 / 0 0 80 90 20 Knoxville McGhee Tyson Airport, TN 60 37 60 41 48 / 0 0 10 90 70 Oak Ridge, TN 60 37 59 40 46 / 0 0 20 90 70 Tri Cities Airport, TN 59 32 61 42 51 / 0 0 10 90 80 TN.
1027 AM CST Sat Nov 28 2020 Today, maximum temperatures should be in the low to mid 40s across much of our area, with the warmest temperatures in our southern counties. Sunday, a low pressure system is expected to bring snow showers to the Northland, mainly in the Arrowhead and along the south shore of Lake Superior. This upper level ridge is expected to bring warmer maximum temperatures today. These temperatures are expected to mix down to the surface, raising highs into the low to mid 40s. These mild temperatures won't last long as a deepening trough in Canada moves through southern Ontario. A cold front will move through the Northland and lower temperatures back into the 30s for Sunday, and could potentially bring snow showers as well.
259 PM EST Sat Nov 28 2020 High pressure will build across Pennsylvania tonight into Sunday.
1218 PM EST Sat Nov 28 2020 High pressure will extend across the area through the weekend.
Clearing skies and lighter winds will make for a cold night across the region with lows reaching the freezing mark at many locations. This will allow a cold front to move through our region early tomorrow. Temperatures are expected to top out in the low 50s to mid 60s behind the front.
Rainfall thus far has been confined to Central and SE TX into SW LA and you have to go west of the I-35 Corridor across WC and NW TX before you find any precipitation in association with the closed upper low that can be seen spinning across Eastern New Mexico, beginning its slow movement eastward into the TX Pnhdl and Hill Country.
Highs in the low/mid 50's to low 60's are on track for today. Diegan Chattanooga Airport, TN 40 61 41 45 27 / 10 80 90 20 10 Knoxville McGhee Tyson Airport, TN 37 60 41 48 27 / 10 10 90 70 40 Oak Ridge, TN 37 59 40 46 26 / 0 20 90 70 30 Tri Cities Airport, TN 32 61 42 51 26 / 0 10 90 80 70 TN.
For the rest of the day, skies will be variable as a weak boundary/cold front slowly slides south towards our area this evening. Temps today will increase to the upper 70s or lower 80s, making it a few degrees warmer than normal.
Then a cold front is expected to push through the region Sunday late morning/afternoon as a low passes to our north.
Visible satellite imagery is showing thinning cloud cover over much of northwest Montana and central Idaho behind a weak cold front that passed through the region this morning. Clouds will persist into tonight and skies will gradually clear throughout the day on Sunday as high pressure builds over the Northern Rockies.
1152 AM CST Sat Nov 28 2020 The main forecast foci are the cold frontal passage late tonight and the midweek brief cool down. Changes occur tonight, between midnight and sunrise Sunday, during which time a strong cold front will plow across the area. The main impacts of the front will be strong winds, gusting to 40 mph Sunday morning and early afternoon, and much cooler temperatures.
1140 AM CST Sat Nov 28 2020 Clouds will increase, especially across southern Kansas, later today in advance of the southern stream upper low which will move out across the southern high Plains. Modest elevated moisture transport and mid-level convergence north of the low will affect the Oklahoma border region of southern Kansas with some very light precip possible. The surface cold front associated with the northern stream upper trof moving across the northern Plains/Upper Midwest will drop south across the area during Sunday.
At the surface, the low is currently located near the southern Alberta/Saskatchewan border. A cold front extends west southwest from this low across southern Canada and into far northern Montana. This whole system will push through the area this afternoon and tonight, bringing breezy west winds, shifting to the northwest as the main cold front passes. The breezy conditions continue Sunday behind the front, with westerly winds and cooler temperatures in the mid 20s to mid 30s.
Pre-frontal trof is located across the western Dakotas with cold front dropping into eastern Montana. Cold front slides through northeast Wyoming/Western South Dakota this evening.
1240 PM EST Sat Nov 28 2020 Dry and seasonable weather is expected through Sunday under high pressure.
1045 AM CST Sat Nov 28 2020 Early This Morning: Persistent light southwesterly winds are holding overnight low temperatures in the lower 30s, with more sheltered valley regions dropping into the 20s. Warmer air has continued to advect eastward tonight and by 12Z, we'll likely see 925 mb temperatures moving past the 90th moving average and towards the max temperature running average. Barring any impact from high lvl cirrus this afternoon, have trended temperatures towards (and above in some areas) the highest model numbers which would result in 50s and even 60s. Temperatures struggle to climb much beyond freezing in the afternoon with wind chills in the teens to lower 20s.
/Tonight through Saturday/ High pressure centered over southern Missouri has allowed for clear skies today.
1152 AM CST Sat Nov 28 2020 Today, maximum temperatures should be in the low to mid 40s across much of our area, with the warmest temperatures in our southern counties. Sunday, a low pressure system is expected to bring snow showers to the Northland, mainly in the Arrowhead and along the south shore of Lake Superior. This upper level ridge is expected to bring warmer maximum temperatures today. These temperatures are expected to mix down to the surface, raising highs into the low to mid 40s. These mild temperatures won't last long as a deepening trough in Canada moves through southern Ontario. A cold front will move through the Northland and lower temperatures back into the 30s for Sunday, and could potentially bring snow showers as well.
However, this is all going to change over the next 48-60 hours as a closed low system currently over the panhandle of TX starts this way tonight.