Aikyam-Lab/Synoptic-Bench huggingface dataset:
1021 PM MST Sat Jan 18 2020 High pressure will build across the western states this weekend resulting in a warming trend and a return to above normal temperatures. There is dry zonal flow aloft along the base of a strong ridge building across the western CONUS with a low pressure anomaly from the Great Lakes SWD.
1043 PM EST Sat Jan 18 2020 Southeast winds will continue to ease through Sunday evening, as an east-west ridge axis across Central Florida settles south to the Keys. There has also been consistency in tracking a few showers on Sunday morning uncomfortably close to Key West, so updated the forecast earlier to add isolated showers to the Lower Keys.
1045 PM EST Sat Jan 18 2020 An approaching cold front will cross the area early Sunday. Dry air will filter into the region Sunday, with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region.
Light to occasionally moderate rain showers are moving through the region along a cold front. /issued 349 PM CST Sat Jan 18 2020/ For today, last hurrah of warm temperatures currently ongoing before a much cooler period comes in with the front currently in northwest Louisiana moving towards the southeast. Behind the front, temperatures have already plummeted into the low 50s. High pressure will build in the wake of the front with cooler temperatures and drier conditions.
High pressure will bring quieter weather for the start of the new work week. Flow patterns suggest the bands will expand southward into the lower Finger Lakes and portions of the Twin Tiers, though accumulation will be minor over this region. High pressure will build eastward and cause the bands to further weaken Sunday night, though activity will remain persistent from the Finger Lakes northeastward.
937 PM PST Sat Jan 18 2020 Building high pressure aloft and offshore flow will bring warmer weather through Sunday.
With this update we expanded the Wind Chill Advisory into far southwest North Dakota where wind chills should reach as low as 30 below, though Bowman county will be on the marginally "warmer" side with somewhat more subdued winds and warmer surface temperatures. Currently, deep area of low pressure continues to spin over the Western Great Lakes region, maintaining a tight pressure gradient across North Dakota and Minnesota. An upgrade for some areas to a wind chill warning not out of the question, though it appears the majority of locations remain warmer than negative 40F.
350 AM EST Sun Jan 19 2020 Colder and drier air will filter into the forecast area on the heels of a cold front.
A dome of high pressure will ooze down through the Northern Plains today and into the Central Plains tonight.
High pressure will bring quieter weather for the start of the new work week. Flow patterns suggest the bands will expand southward into the lower Finger Lakes and portions of the Twin Tiers, though accumulation will be minor over this region. High pressure will build eastward and cause the bands to further weaken Sunday night, though activity will remain persistent from the Finger Lakes northeastward. By Monday, the strengthening anticyclone will bring an end to most of the remaining lake effect snow showers. Surface ridging builds westward Monday night and will bring an end to the lake effect snow showers.
Highs today and lows tonight were increased by a few degrees due to the increased sky cover and warmer air from the northeast wrapping around the departing winter storm. Some teens below zero are still possible nearest the ridge axis over the eastern Dakotas, assuming some clearing there which isn't too likely. Longer term trends continue to show temperatures warming ahead of the Wed/Thu trough.
Cold air advection will continue through the period as arctic high pressure builds across the region. Arctic high pressure will continue to slide south toward the Mid-South. Lows will be in the lower to mid 20s with wind chills in the teens by morning.
944 AM EST Sun Jan 19 2020 Colder temperatures and periodic snow showers are expected through Monday with a reinforcing cold front. Dry and warmer weather is then expected through midweek under high pressure. Elected to bump up PoPs to likely/categorical values initially as broad upper troughing and cold advection support numerous snow showers across much of the CWA. Accumulation should be an inch or two N of I 80, and in the higher terrain where some upslope enhancement is expected. Low inversion heights, and less than optimal upslope flow, should help to limit the snow accumulation potential in the higher terrain. Any snow showers should end Monday morning with lowering inversion subsidence inversion heights under building high pressure.
A slow warming trend is expected as an upper level ridge builds across the Great Basin, and then transitions east into the Rocky Mountain region. Model soundings are hinting at some patchy fog forming across the lower valleys of Albany and Carbon counties late Sunday night and early Monday morning.
Accumulations will be less than an inch with the highest amounts expected in the Lake of the Woods and Beltrami counties.
Southwesterly breezes will spread warmer air across North- Central Montana today. However, locations east of Chester are likely to remain cold for one more day, with a warmer change coming on Monday. Clouds are thinning over the area this morning as an upper level ridge strengthens over the Pacific Northwest. Temperatures will continue to climb above freezing today, spreading from west to east across North-central Montana.
Winter has begun its return to the mid state, with temperatures in the low 30s early this morning. Winds above 10 mph have helped mix the low levels and keep temps from falling further as dewpoints in the 20s and even the teens just upstream with clear skies would result in temps falling further this morning. Still have lows in the low 20s on the Plateau and mid/upper 20s elsewhere overnight. High temps Monday will struggle to get above freezing for northern and eastern zones with just the mid 30s in the south.
Models have been consistently showing a clipper system, currently across central Canada, moving into and through the Upper Mississippi valley early Monday, and into the lower Ohio River valley Monday afternoon. The core of the arctic high pressure settles over the region Monday night, with lows from 1 above to 12 below depending on location.
Latest guidance suggests this will continue through the morning, while a cold front moves SE across SE GA. High pressure northwest of the waters will bring elevated northwest winds on Monday over the area waters.
535 AM CST Sun Jan 19 2020 Breezy northwest winds continue this morning on the backside of a deep low pressure system that has migrated into the Great Lakes. Have sided with cooler guidance values today with deep fresh snow cover across the region, but have sided closer to mean values where clouds will influence warming.
516 AM CST Sun Jan 19 2020 Canadian high pressure will bring bitter cold temperatures to the region through the short term portion of the forecast. As the high pressure builds in today, the breezy northwesterly winds over the northeastern CWA will subside with blowing snow ending. With the high pressure over the region tonight, along with light winds, lows should drop into the teens below zero most locations. Southerly winds developing on Monday will bring slightly warmer temperatures into the area with highs in the single digits and low teens above zero. To start the period a strong ridge of high pressure at the mid- levels should exit over the region. This ridge will be somewhat short-lived as energy flows off the Pacific and into the Rockies, after which it should start to dig toward the southeast.
Temperature falls thus far have been a little slower than expected, with readings still a good 10 degrees or so warmer than forecast lows. Increasing clouds can be expected starting TUE night ahead of an upper trof approaching from the west, with warmer temperatures and increasing SFC MSTR following suit on WED as return flow becomes established.
456 AM EST Sun Jan 19 2020 A cold front moving through the Susquehanna Valley shortly before daybreak will be followed by an increasing and gusty, westerly wind today with numerous snow showers, especially across the Northern and Western Mountains of the state. Look for flurries and isolated to scattered snow showers across the Central Ridge and Valley region. An upper level trough will swing through the northeast CONUS early in the upcoming week, then high pressure will settle over the region for the second half of the week. Cold front will be departing our SE counties around 12Z today.
For the next few days a large-scale upper trough will be to the east and an upper ridge to the west.
Followed closely to CONSAll blend lows, which are warmer than NBM and a little warmer than this morning's forecast lows.
759 AM EST Sun Jan 19 2020 Colder temperatures and periodic snow showers are expected through Monday with a reinforcing cold front. Dry and warmer weather is then expected through midweek under high pressure. Previous Discussion: Scattered, mainly light snow showers are expected to continue this morning under broad upper troughing. Accumulation should be an inch or two N of I 80, and in the higher terrain where some upslope enhancement is expected. Low inversion heights, and less than optimal upslope flow, should help to limit the snow accumulation potential in the higher terrain. Any snow showers should end Monday morning with lowering inversion subsidence inversion heights under building high pressure.
High pressure/cold drier airmass will continue to build across S TX today. This will lead to highs being much cooler today than yesterday despite increasing sunshine. This will allow temps to drop into the mid to upper 30s across the northern Rio Grande Plains to the Victoria Crossroads, and down to the low to mid 40s across the southern areas.
/Issued 350 AM EST Sun Jan 19 2020/ Colder and drier air will filter into the forecast area on the heels of a cold front.
Today Through Monday Night An upper trough is over the Great Lakes and Appalachians with an upper ridge over the west coast. The trough will move to the east coast today as the ridge moves into the Rockies. High pressure and subsidence will continue over Arkansas through the short term period. Highs will be cooler today in the upper 30s to lower 50s, and then lower 30s to mid 40s for Monday.
Moisture just west of the Idaho/Montana border continues to stream north and eastward, and could still impact northwest Montana with light snow and a chance at freezing rain mixing in at times. This can be common during periods of high pressure, which is what the region is now transitioning in to, as brief as it may be.
Water vapor imagery this morning shows upper-level ridging amplifying over the western CONUS while surface obs depict an elongated Canadian high pressure ridge axis building southeastward over the Northern/Central High Plains.
404 AM MST Sun Jan 19 2020 A ridge aloft will build over the Great Basin today keeping the forecast area under northwest flow. Recent satellite imagery shows an expansive cirrus shield in the ridge to our west. The 700 mb temperatures would suggest that highs may be a few degrees warmer than yesterday, but the cloud cover could off set that. The ridge progresses over the area tomorrow, which should cause temperatures to warm a little closer to normal.
10s and 20s were noted in the high country. Ridge aloft builds. Will have to watch out in the SLV for some patchy low clouds/fog on the valley floor as the low levels will saturate with the snow melt.
Breezy north winds averaging near 10 kts will prevail today, then dropping off closer to 5 kts or less by 20/00Z as high pressure at the sfc continues to dominate. Cool and breezy N/NE winds will prevail today as temperatures gradually recover into the lower to mid 50s for afternoon highs with ample sunshine expected. An even colder night will follow tonight as winds will decouple and temperatures fall off quickly to near or below the freezing mark by early Monday morning as high pressure dominates. This will result in temperatures likely running a few degrees cooler compared to today as highs will only reach the upper 40s over our northern zones with lower to mid 50s farther south as mostly sunny skies prevail once again.
Temperatures and wind chills of 5 to 15 degrees below zero over Southwest Phillips County were relatively warmer than expected, therefore, the Wind Chill Advisory was cancelled early. The arctic airmass that is nestled at the surface will gradually mix out and allow for temperatures to warm as an upper level ridge builds over Montana on Monday. With that weak trough arriving a few days from now, it may be worth monitoring. Towards the end of the week, another ridge builds into the Western US, continuing the seasonably warmer, mild, and dry weather.
The pattern aloft reflected a northwest flow regime across our region, in between an upper ridge over the Rockies and a deep trough across the eastern half of the CONUS. Temps will struggle today, especially in our eastern zones in proximity to the thermal trough. and look for highs to range from the teens in the Genoa/York areas to readings in the low 30s towards Cambridge/Phillipsburg.
521 AM CST Sun Jan 19 2020 Latest water vapor satellite imagery shows upper level trough over the Great Lakes Region with northwest flow aloft over the Northern Plains.
315 AM PST Sun Jan 19 2020 High pressure aloft and offshore flow at the surface will bring a warm day today.
337 AM MST Sun Jan 19 2020 High pressure will build across the region today with sunny skies and highs reaching near 75 degrees across the lower deserts.
303 AM MST Sun Jan 19 2020 The building ridge of high pressure, currently over the Great Basin this morning, will continue to strengthen today while slowly migrating east over the full stretch of the Rockies. With a lack of the mid and upper level Pacific moisture streaming around the top of the ridge today, more sunshine is expected as skies are expected to be mostly sunny across much of the region. For Monday, high amplitude ridge builds over Colorado with dry and warming airmass along with weak flow aloft.
Latest radar showed the snow showers over Douglas County and the Bayfield Peninsula have decreased in intensity as the gravity wave continued to weaken as the low level flow veers to more northerly instead of northwest. Additional snowfall through the day will be from 1 to 3 inches, with the snowbelt of Iron County most likely to see the higher amounts. There is agreement among most of the high resolution models keeping any snow showers on the light side. High pressure and drier air on Monday will cause clouds to clear out leading to mostly sunny conditions for most areas.
641 AM EST Sun Jan 19 2020 A cold front moving through the Susquehanna Valley shortly before daybreak will be followed by an increasing and gusty, westerly wind today with numerous snow showers, especially across the Northern and Western Mountains of the state. Look for flurries and isolated to scattered snow showers across the Central Ridge and Valley region. An upper level trough will swing through the northeast CONUS early in the upcoming week, then high pressure will settle over the region for the second half of the week. Cold front will be departing our SE counties around 12Z today.
649 AM EST Sun Jan 19 2020 A cold front will cross the area early this morning bringing light rain showers to the area. Dry air will filter into the region behind the front today with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region.
and Monday Cyclonic upper flow today and an approaching upper trough tonight will keep skies mostly cloudy.
918 AM EST Sun Jan 19 2020 Low pressure to the north moves well to the northeast today as high pressure builds into the central United States. High pressure builds in slowly from the west settling over the region by midweek. Deep layered cyclonic flow will persist through today as energy continues to rotate through the upper level longwave trough. Moisture remains and with energy coming through the upper trough this afternoon skies will become mostly cloudy. Heights begin to rise early this evening as the trough weakens and the parent low moves well to the northeast, and ridging builds to the west. The 500mb trough will remain as an Alberta clipper rotates through the central states.
311 AM CST Sun Jan 19 2020 Tranquil weather is expected the next couple of days due to an upper ridge over the western U. This ridge will dampen as a jet max moves into southern California bringing an upper trough along the U.
238 AM MST Sun Jan 19 2020 Southwesterly breezes will spread warmer air across North- Central Montana today. However, locations east of Chester are likely to remain cold for one more day, with a warmer change coming on Monday. Clouds are thinning over the area this morning as an upper level ridge strengthens over the Pacific Northwest. Temperatures will continue to climb above freezing today, spreading from west to east across North-central Montana.
549 AM CST Sun Jan 19 2020 Canadian high pressure will bring bitter cold temperatures to the region through the short term portion of the forecast. As the high pressure builds in today, the breezy northwesterly winds over the northeastern CWA will subside with blowing snow ending. With the high pressure over the region tonight, along with light winds, lows should drop into the teens below zero most locations. Southerly winds developing on Monday will bring slightly warmer temperatures into the area with highs in the single digits and low teens above zero. To start the period a strong ridge of high pressure at the mid- levels should exist over the region. This ridge will be somewhat short-lived as energy flows off the Pacific and into the Rockies, after which it should start to dig toward the southeast.
A cooler, drier airmass will continue to filter into the region through the day after yesterday's frontal passage. Lows Sunday night will range from the low 30s in the south to the low 20s in the north, making it one of the coolest nights we've experienced in a while. A broad trough over the eastern half of the country will be reinforced by a wave diving into the Plains tonight/Monday morning.
916 AM EST Sun Jan 19 2020 Low pressure to the north moves well to the northeast today as high pressure builds into the central United States. High pressure builds in slowly from the west settling over the region by midweek. Deep layered cyclonic flow will persist through today as energy continues to rotate through the upper level longwave trough. Moisture remains and with energy coming through the upper trough this afternoon skies will become mostly cloudy. Heights begin to rise early this evening as the trough weakens and the parent low moves well to the northeast, and ridging builds to the west. The 500mb trough will remain as an Alberta clipper rotates through the central states.
551 AM CST Sun Jan 19 2020 Canadian high pressure will bring bitter cold temperatures to the region through the short term portion of the forecast. As the high pressure builds in today, the breezy northwesterly winds over the northeastern CWA will subside with blowing snow ending. With the high pressure over the region tonight, along with light winds, lows should drop into the teens below zero most locations. Southerly winds developing on Monday will bring slightly warmer temperatures into the area with highs in the single digits and low teens above zero. To start the period a strong ridge of high pressure at the mid- levels should exist over the region. This ridge will be somewhat short-lived as energy flows off the Pacific and into the Rockies, after which it should start to dig toward the southeast.
330 AM CST Sun Jan 19 2020 Breezy northwest winds continue this morning on the backside of a deep low pressure system that has migrated into the Great Lakes. Have sided with cooler guidance values today with deep fresh snow cover across the region, but have sided closer to mean values where clouds will influence warming.
High pressure will allow for dry weather today, with even some filtered sun through high clouds.
342 AM MST Sun Jan 19 2020 High pressure aloft will strengthen over Utah through Sunday before shifting east of the state Monday.
520 AM EST Sun Jan 19 2020 Colder temperatures and periodic snow showers are expected through Monday with a reinforcing cold front. Dry and warmer weather is then expected through midweek under high pressure. Scattered, mainly light snow showers are expected to continue this morning under broad upper troughing. Accumulation should be an inch or two N of I 80, and in the higher terrain where some upslope enhancement is expected. Low inversion heights, and less than optimal upslope flow, should help to limit the snow accumulation potential in the higher terrain. Any snow showers should end Monday morning with lowering inversion subsidence inversion heights under building high pressure.
This will set the stage for a very strong radiational cooling night tonight but these conditions are even better Monday night as temps could fall below freezing for several hours for locations mainly encompassing north shore areas. High pressure will settle into the area through much of the week keeping temps cool and dry air in place.
917 AM EST Sun Jan 19 2020 A cold front moving through the Susquehanna Valley shortly before daybreak will be followed by an increasing and gusty, westerly wind today with numerous snow showers, especially across the Northern and Western Mountains of the state. Look for flurries and isolated to scattered snow showers across the Central Ridge and Valley region. An upper level trough will swing through the northeast CONUS early in the upcoming week, then high pressure will settle over the region for the second half of the week.
320 AM CST Sun Jan 19 2020 Latest water vapor satellite imagery shows upper level trough over the Great Lakes Region with northwest flow aloft over the Northern Plains.
535 AM CST Sun Jan 19 2020 High pressure, clear skies, and VFR conditions will continue through tonight. Today Through Monday Night An upper trough is over the Great Lakes and Appalachians with an upper ridge over the west coast. The trough will move to the east coast today as the ridge moves into the Rockies. High pressure and subsidence will continue over Arkansas through the short term period. Highs will be cooler today in the upper 30s to lower 50s, and then lower 30s to mid 40s for Monday.
417 AM EST Sun Jan 19 2020 High pressure will slowly build into the area through mid week.
A backdoor Arctic cold front sags through the CWA today and tonight with northerly winds common this afternoon and tonight. /Issued 254 AM CST Sun Jan 19 2020/ An Arctic cold front analyzed across central MO into northeastern KS will backdoor into the region today and eventually sag through most of the forecast area by tonight.
They should slowly slacken as we go through the day with high pressure building in. As strong CAA continues to bring in arctic air from the northwest, temperatures this morning will tumble into the low teens across southern IN and into the mid 20s in southern KY. These colder temps combined with the breezy winds will result in wind chill values this morning near zero in southern IN and into the low teens in southern KY. Despite partly to mostly sunny skies today, temperatures will struggle to reach above freezing this afternoon, with wind chills likely remaining below 20 degrees throughout the day.
349 AM MST Sun Jan 19 2020 A ridge aloft will build over the Great Basin today keeping the forecast area under northwest flow. Recent satellite imagery shows an expansive cirrus shield in the ridge to our west. The 700 mb temperatures would suggest that highs may be a few degrees warmer than yesterday, but the cloud cover could off set that. The ridge progresses over the area tomorrow, which should cause temperatures to warm a little closer to normal.