Aikyam-Lab/Synoptic-Bench huggingface dataset:
High pressure will build over the northwestern U. This ridge will keep the Northern Rockies dry and the daytime high temperatures on the warm side of normal. While the Northern Rockies enjoys fair weather on Monday, a trough of low pressure approaches the Pacific Northwest coast. Still, most of the snow will fall in the higher elevations where terrain enhancement will wring out the moisture. The Highway 2 corridor from West Glacier to Marias Pass will see a few inches in the lower elevations and about 6 inches at the summit.
258 PM EST Sun Nov 21 2021 Current surface analysis shows NNE-SSW oriented cold front draped across northwest IN and extending back through the lower MS Valley and into the southern Plains. Precip totals have generally remained below one inch so far, with the highest amounts of 0. High pressure builds into the region tomorrow with quieter weather expected.
Forecast on track this morning with some downslope resulting in clearing along the mountain foothills with warmer temperatures where sunshine is reaching the surface. JB Chattanooga Airport, TN 62 45 51 29 51 / 30 100 0 0 0 Knoxville McGhee Tyson Airport, TN 60 44 48 24 47 / 30 100 0 0 0 Oak Ridge, TN 57 43 47 23 47 / 50 100 0 0 0 Tri Cities Airport, TN 57 41 46 21 43 / 20 100 10 0 0.
253 PM EST Sun Nov 21 2021 The area dries out behind the departing low pressure system, but winds increase into this evening as a cold front arrives.
Looping through plan view model data shows that the lake really helps give a boost to the wind along and just behind the cold frontal passage. There could be a dusting to around a 1/2 inch of accumulation on the high ground of Lake and Osceola Counties this evening, but otherwise not expecting much at all.
(Through Tonight) The cold front has pushed its way through all of eastern Oklahoma and western Arkansas early this afternoon, with much drier air moving into the area behind it.
Latest water vapor imagery reveals a positively tilted upper trough sliding quickly southeast from the Southern Plains into the Great Lakes. Behind this wave an upper ridge is sitting along the West Coast albeit with a slight Rex block look via a cut off low over SoCal. With that stated enough westerlies still exist across the Rockies to permit the lee trough to deepen after midnight with winds turning more to the west by sunrise on Monday. Quiet conditions persist into Monday as the aforementioned upper ridge slides east into the Rockies yet leaving the Central Plains under a subsident northwest flow regime. This will create a fragmented lee trough structure across the High Plains but little else in the way of notable weather.
Forecast on track this morning with some downslope resulting in clearing along the mountain foothills with warmer temperatures where sunshine is reaching the surface. McD Chattanooga Airport, TN 62 45 51 29 51 / 30 100 0 0 0 Knoxville McGhee Tyson Airport, TN 60 44 48 24 47 / 30 100 0 0 0 Oak Ridge, TN 57 43 47 23 47 / 50 100 0 0 0 Tri Cities Airport, TN 57 41 46 21 43 / 20 100 10 0 0.
Moisture is increasing across the Tennessee Valley with southerly flow ahead of an approaching cold front. In the upper levels, there is a weak positively tilted trough that extends from the western Great Lakes southwestward into the Southern Plains. There is another trough just to the west diving southeastward across the Upper Midwest. A much more pronounced frontal boundary is associated with the trough across the Upper Midwest. Temperatures today will warm up into the low to mid 60s with warm air advection ahead of the front. The big chill arrives Monday night as clear skies will allow temperatures to plummet down into the low to mid 20s.
A mid/upper ridge across the west coast is progged to translate eastward over the Central Great Basin with northwest mid/upper flow extending downstream across the central CONUS. As high pressure moves east across the Middle Mississippi Valley and into the Ohio Valley area, southerly low level flow will return to Kansas. This will allow above normal temperatures to return to the area with highs climbing into the lower 60s.
1136 AM CST Sun Nov 21 2021 (Today and tonight) The main story for the short term is the cold front that is expected to move through the area this morning and early this afternoon. With the cold front moving through earlier in the day, gusty winds bringing cooler air from the north, and ample cloud cover preventing strong diurnal heating, daytime highs across the area are largely expected to remain in the low to mid 60s. Overnight lows will be much cooler than last night with lows ranging from the low 30s in the Big Country to to low 40s in our southern counties.
Broad ridging is set up over the Pacific Coast with moisture being driven into BC and back down into eastern MT. We should see the upper ridge axis pass over Idaho around mid-day tomorrow.
(This evening through Monday) A cool night is on tap for west central Texas tonight in the wake of a cold front. Expect morning lows to fall into the mid 30s across the north to the lower 40s along the I-10 corridor.
High temperatures will be in the 50s, but will drop into the middle to upper 40s across the Illinois River Valley during the afternoon after a cold front passes. As a much drier air mass settles in behind the front, temperatures will bottom out in the lower 20s overnight with wind chill values in the lower teens. 08z/2am surface analysis shows a cold front extending from southern Lake Michigan southwestward along the Illinois River into north-central Missouri. Given overnight lows expected to drop into the lower to middle 20s, wind-chills will bottom out in the teens.
The cold front that moved across the area today was quite strong and had significant cold air advection behind it that led to wind gusts of 40 to 50 mph. This will set the stage for a very cold night as winds become light and radiation cooler develops.
243 PM EST Sun Nov 21 2021 A cold front will pass through the region late tonight into Monday morning.
Last night's cold front is now approaching southeastern Minnesota so winds will continue to diminish as the pressure gradient relaxes. Tonight will see near normal to slightly below normal lows across the southern half of the state (upper teens to lower 20s), but the north will get pretty chilly with lows in the lower single digits to mid teens (coldest northeast). Upper ridging tries to build back in Monday, giving way to a nice warmup with widespread highs in the lower 40s to lower 50s for most. A tight temperature gradient will remain in place across the state however, with highs in the low to mid 30s across portions of the north central and northeast.
Moderate to fresh easterly breezes will continue to slacken throughout the day as high pressure over the western Atlantic will continue east into the central Atlantic.
South to southwest winds and warm air advection will continue into Monday night as upper ridging moves briefly into the Plains, keeping temps in the teens and 20s.
1125 AM CST Sun Nov 21 2021 A cold front will push southward through Nebraska today. Expect this to yield a fairly large range in temperatures today with highs ranging from the lower 40s up near the Niobrara valley to the lower 50s across southwestern Nebraska near Imperial. The increasing mid/high clouds will be associated with a warm front that will bring a quick turn around to temperatures well above normal. Highs Monday will range from the lower 50s near the Niobrara to the low/mid 60s south of Interstate 80.
121 PM CST Sun Nov 21 2021 Clear skies and breezy northwest winds persist this afternoon behind a cold front that moved through earlier this morning. Temperatures will drop quickly, but increasing clouds (especially in northeast parts of the area) should keep them from falling any lower than the low to mid 20s. Skies should mostly clear on Monday as the upper trough pushes to the east. Surface winds will return to the southwest (but remain fairly light) as ridging builds over the Rockies. Temperatures could reach the 60s for areas southwest of he tri-cities, but northeastern parts of the area may be stuck in the low to mid 50s, especially if clouds end up lingering in this area a bit longer.
Ceilings will improve from NW AR to the SE beginning later this evening as NW winds carry drier air into the state behind the cold front. Temperatures are roughly 10 degrees warmer versus this time last night thanks to said cloud cover and southwest surface flow. Upper flow is zonal over the mid south at this time but expected to amplify as the day progresses with an upper trough strengthening as it moves eastward from the central conus, paired with an expanding western ridge. Developing NW flow will drive the cold front through the state with scattered showers developing along and behind the boundary. Northwest flow behind the front and building high pressure will bring much cooler and drier air back into the region.
1115 AM CST Sun Nov 21 2021 (Today and tonight) Cold front starting to increase southward progression early this morning.
(This evening through Monday) The cold front has moved through Oklahoma and western north Texas, as cool, dry air continues to advect in with the gusty northerly winds behind the front. These winds will decrease overnight, and along with the clear skies should lead to stronger cooling tonight and widespread lows in the lower 30s/upper 20s. Highs are expected to be near normal values, with highs ranging from the lower 60s in the east to the upper 60s in the west.
544 PM CST Sun Nov 21 2021 (This evening through Monday) A cool night is on tap for west central Texas tonight in the wake of a cold front. Expect morning lows to fall into the mid 30s across the north to the lower 40s along the I-10 corridor.
/issued 205 PM CST Sun Nov 21 2021/ A slug of pacific moisture will continue to shift southward this evening as an upper level trough axis progresses to the south. Upper level ridging will continue to progress eastward during the day on Monday. We will quickly return to weak surface lee troughing/cyclogenesis. With the ridge moving overhead, a significantly drier atmospheric column will take shape over the area along with large scale subsidence.
339 PM CST Sun Nov 21 2021 (Issued 339 PM CST Sun Nov 21 2021) Tonight through Monday night: The strong cold front is currently moving across srn WI with wind gusts of 35-50 mph. Believe the higher wind gusts will be brief so will not expand the Wind Advisory. Sunshine is expected but still chilly with high temps around the freezing mark.
514 PM CST Sun Nov 21 2021 (This evening through Monday) The cold front has moved through Oklahoma and western north Texas, as cool, dry air continues to advect in with the gusty northerly winds behind the front. These winds will decrease overnight, and along with the clear skies should lead to stronger cooling tonight and widespread lows in the lower 30s/upper 20s. Highs are expected to be near normal values, with highs ranging from the lower 60s in the east to the upper 60s in the west.
Meanwhile, steep lapse rates behind the cold front have resulted in wind gusts as high as 45 kts (KISW) this afternoon. Clouds are quickly clearing out behind the snow as well due to high pressure building in from the west. The combination of clear skies and the CAA will result in lows in the teens for most locations, a little warmer in the low 20s near Lake Michigan. High pressure will lead to mostly sunny to partly cloudy skies and high temps will range from about 25 to 32 degrees, coldest in the Northwoods. Monday Night Through Sunday A cold night is in store for northeast Wisconsin Monday night as surface ridging brings light winds and mostly clear skies to the area for a good portion of the overnight hours.
/issued 529 PM CST Sun Nov 21 2021/ Narrow line of convection in association with a strong cold front will continue to push through our airspace this evening before exiting our airspace after midnight.
320 PM CST Sun Nov 21 2021 Fast-moving showers and isolated thunderstorms are pushing across the Mid-South ahead of a cold front this afternoon.
410 PM CST Sun Nov 21 2021 Cold front still on track to move through the area late tonight with high pressure building in behind it. Cooler and drier air moves into the area behind the front, and Monday night provides somewhat of a challenge regarding forecast lows.
A low pressure system will produce cloudy and cool conditions for the middle of the week, otherwise temperatures will continue to run right around normal. Ensemble guidance is consistent with previous forecast runs with the trough sliding south and merging with a closed low off the SOCAL coast. Upper ridge of high pressure will quickly slide east of the area overnight and then the closed low will kick a piece of energy north along the coast tomorrow morning.
A strong cold front has moved through the CWA today switching the winds around to the northwest and increasing all across the CWA. As the cold air continues to filter in, it is possible katabatic winds will set up along the north shore due to the higher terrain in that area. As mentioned before, the cold air will continue to filter in behind the cold front long after it has passed through.
410 PM MST Sun Nov 21 2021 An expansive ridge of high pressure aloft has begun to build over the western CONUS, and it is responsible for dry conditions and mostly clear skies. Lows tonight in the valleys will be similar to this morning, but the mountains should be warmer with the modifying air mass. Tomorrow will be the warmest day of the week as the ridge axis passes over the region.
/issued 320 PM CST Sun Nov 21 2021/ Fast-moving showers and isolated thunderstorms are pushing across the Mid-South ahead of a cold front this afternoon.
931 PM EST Sun Nov 21 2021 High pressure will build into the area, offering dry weather and below normal temperatures for the start of the work week before moderating somewhat toward the Thanksgiving Day holiday.
634 PM EST Sun Nov 21 2021 High pressure will build into the area, offering dry weather and below normal temperatures for the start of the work week before moderating somewhat toward the Thanksgiving Day holiday.
Current surface analysis shows NNE-SSW oriented cold front draped across northwest IN and extending back through the lower MS Valley and into the southern Plains. Precip totals have generally remained below one inch so far, with the highest amounts of 0. High pressure builds into the region tomorrow with quieter weather expected.
The cold front is now pushing into northwestern middle TN.
Breezy north winds behind a cold front will subside this evening, with stronger gusts limited to the Laughlin Bullhead City area Monday.
High pressure continues to build over the region this afternoon with warming temperatures expected Monday. The ridge axis will slide generally east of the forecast area by Monday evening, with a disturbance expected to move through the forecast area Monday night.
After midnight, under deep northwesterly flow, a much cooler and drier airmass will surge into the PAH forecast area, yielding lows at or below freezing Mon morning. Though the wind will be settling down some during the day Mon, mid to high clouds may develop, and limit the high temps to the upper 30s/lower 40s, especially east of the MS River. Late Mon night, with nearly calm winds and clear skies, the lowest temps of the season are expected.
211 PM MST Sun Nov 21 2021 An expansive ridge of high pressure aloft has begun to build over the western CONUS, and it is responsible for dry conditions and mostly clear skies. Lows tonight in the valleys will be similar to this morning, but the mountains should be warmer with the modifying air mass. Tomorrow will be the warmest day of the week as the ridge axis passes over the region.
557 PM CST Sun Nov 21 2021 Clear skies and breezy northwest winds persist this afternoon behind a cold front that moved through earlier this morning. Temperatures will drop quickly, but increasing clouds (especially in northeast parts of the area) should keep them from falling any lower than the low to mid 20s. Skies should mostly clear on Monday as the upper trough pushes to the east. Surface winds will return to the southwest (but remain fairly light) as ridging builds over the Rockies. Temperatures could reach the 60s for areas southwest of he tri-cities, but northeastern parts of the area may be stuck in the low to mid 50s, especially if clouds end up lingering in this area a bit longer.
The quick moving cold front has begun to push through our forecast area though, bringing along very gusty winds along and behind it. While the temperatures are warmer today, the winds have helped to keep things quite cool. Quickly moving cold front pushes out of our forecast area early tonight, with very cold temperatures trailing it. Later in the night, the northwest winds will begin to slow down, as high pressure settles in. Tomorrow, we will see the large upper ridge to the west slowly start to push east. Winds will continue to be relatively light, as high pressure treks east just south of our area.
922 PM EST Sun Nov 21 2021 A cold front will pass through the region late tonight into Monday morning.
High pressure persists over the region which will warm temperatures and bring periods of offshore winds. Wall to wall sunshine blankets the Bay Area this afternoon thanks to high pressure overhead and offshore flow at the surface. High pressure will remain over the region keeping dry conditions in place.
713 PM EST Sun Nov 21 2021 Nearly zonal flow aloft the area tonight shifts east as a long wave trough moves into eastern US Mon. This will shift high pressure currently across FL and the east Gulf of Mexico eastward and propel a couple of fronts out of the Deep South and into FL. The second front will begin to bring in cooler and drier air with northwest winds. Approaching cold front will help clear BR and low clouds AFT 14Z and support VCSH 14-19Z. Northeast winds 10-15 knots over night shift to north and increase some as a couple of cold fronts. High pressure builds in behind the second front Mon night with hazardous winds and seas that continue into midweek. The high pressure tracks east and weaken during the last half of the week.
A stationary coastal trough that produced significant rainfall in Saint Lucie County earlier this afternoon will remain in place into the overnight hours. Shower activity is expected to decrease overnight, then come to an end late as winds shift offshore in response to an approaching cold front. A strong cold front will sweep through the area tomorrow, with a line of showers likely along the leading edge of the front. Low clouds will lift late Monday morning, then a strong cold front crosses the area. A strong cold front will cross the local waters during the afternoon, shifting winds NW and increase to 15-20KT.
937 PM EST Sun Nov 21 2021 A strong cold front will move across the region Monday.
630 PM EST Sun Nov 21 2021 A strong cold front will move across the region Monday.
529 PM CST Sun Nov 21 2021 Narrow line of convection in association with a strong cold front will continue to push through our airspace this evening before exiting our airspace after midnight. It's associated cold front has now made it into our far nwrn areas. Meanwhile, a cooler and drier airmass will be filtering swd in the wake of the front, bringing clearing skies from n to s through mid morning Monday. Clear skies and cooler temps very near or just below seasonal normals will carry us through Monday night, as nwly flow aloft and high pressure at the sfc become the predominant influencers.
510 PM CST Sun Nov 21 2021 The cold front has already moved through the area early this afternoon with the winds behind the front the main issue. Other than the winds, it looks pretty quiet through Monday as an area of high pressure drops out of the Dakotas into Missouri with the ridge axis extending north over the area.
high pressure continues to build across the state, with clear skies. Temperatures have been cool this afternoon, with 40s and 50s across the lower elevations. high pressure will dominate the region through the day Monday. Overnight lows tonight will fall into the teens across the San Luis Valley, with 20s the lower 30s across the Plains.
While the large high pressure continues to move slowly east well offshore New England, ridging continues into the southeast. The low chance pops with the outside mention of thunder seems to be on track for tonight. Light northeast breezes will back to the northwest and freshen on Monday, as a strong cold front approaches the Florida Keys coastal waters.
A series of cold fronts will push across central Illinois over the next 7 days, yielding volatile temperature swings. This feature will help drive a surface cold front through the Upper Midwest and central Illinois by evening. Temperatures will dip into the lower 20s overnight.
On Monday, a substantial warmup, as an upper level ridge builds over the Intermountain west. With dewpoints ranging in the low 20s, elevated fire weather conditions will develop with afternoon humidity as low as 15 to 25 percent across the western half of the area. Monday night, clear skies with a strong thermal ridge in place. The upper level ridge will weaken and flatten out over the region.
520 PM CST Sun Nov 21 2021 (Through Tonight) The cold front has pushed its way through all of eastern Oklahoma and western Arkansas early this afternoon, with much drier air moving into the area behind it.
High pressure will bring dry and stable conditions to the area through Monday. The next storm system will bring cooler temperatures for midweek, but little moisture.
The warm downsloping winds will keep lows in the foothills and adjacent plains 5 to 10 F warmer, in the upper 20s and lower 30s, and the low-lying cold pools should see temperatures 5 to 10 F colder than surrounding areas. Heights will continue to rise Monday as the upper level ridge moves east over the Rockies. Expect high temperatures in the low to mid 60s on the plains and 40s in the high country.
The cold temperatures, warmer lake temperatures, and northwest surface winds are resulting in some localized lake effect snow over east central Lake of the Woods County. South to southwest winds and warm air advection will continue into Monday night as upper ridging moves briefly into the Plains, keeping temps in the teens and 20s.
408 PM MST Sun Nov 21 2021 Water vapor shows upper trof over the Great Lakes with upper ridge covering much of the western CONUS. At the surface, high pressure is centered over the Dakotas.
605 PM EST Sun Nov 21 2021 Winds will increase this evening behind a cold front.
Anderson (Issued 339 PM CST Sun Nov 21 2021) Tonight through Monday night: The strong cold front is currently moving across srn WI with wind gusts of 35-50 mph. Believe the higher wind gusts will be brief so will not expand the Wind Advisory. Sunshine is expected but still chilly with high temps around the freezing mark.
A lee trough will prevail across the greater region. For tonight, lee troughing will continue through the overnight period. Think they will reach strong status, although some weaker winds in closer proximity to the lee trough may be possible.
The clearing line, behind the cold front, currently extends from Lake City, Tennessee southwest back through Jonesboro, Arkansas. Looking at the GOES Nighttime Microphysics RGB channel, it reveals very localized dense fog on the windward side of Crowley's Ridge. /issued 320 PM CST Sun Nov 21 2021/ Fast-moving showers and isolated thunderstorms are pushing across the Mid-South ahead of a cold front this afternoon.
light and variable wind tonight will slowly pick back out of the S tomorrow (This afternoon through Monday night) Satellite data and mesoanalysis both indicate that the cold front has cleared west Texas. In its wake, gusty northerly winds are present as surface ridging builds into the region. So far, winds at KGDP have not hit warning criteria; however, with a few more hours left in the warning, we'll continue the high wind warning through expiration at 00Z.