Aikyam-Lab/Synoptic-Bench huggingface dataset:
A few spots in the high mountain valleys should drop below -20F. On Monday, the upper level ridge will build over the state with warm advection aloft. There will be a cirrus shield working this way which may limit heating a bit, but most of this should be of the thin variety ahead of the sharp ridge axis. Therefore, we should see highs reach the lower 50s in Denver and the Palmer Divide, and mid to upper 40s over the plains. Forecast reasoning remains unchanged as the medium range models continue to show upper ridging over the state Tuesday with the warmest temperatures of the week and light winds.
1242 AM EST Mon Jan 20 2020 An upper level trough will swing through the northeast CONUS early in the upcoming week. High pressure will then settle over the region for the second half of the week bringing perhaps the coldest air of the season.
Attention then turns to Monday when a strong upper trof/clipper system moves across the CWA during the afternoon and early evening. All the models are at least showing good large scale forcing for ascent with this trof, and a clustering of them has light QPF centered through central MO. Although the low level moisture will be quite limited with surface ridging over the region, it appears that there will be light snow and flurries ahead of this feature across parts of our forecast area from late Monday morning into early Monday evening. Most of the models continue to depict the highest QPF, albeit light over central MO Monday afternoon.
Snow levels will be around 4000 feet MSL, keeping mostly rain showers or virga for the low elevations.
1240 AM EST Mon Jan 20 2020 Very quiet weather with high pressure building in from the west. As the boundary layer cools inland during the evening, the low level flow should back a little more northwesterly, forcing the better snow showers out into Lake Huron and Sarnia, Ont. A deepening short wave impulse will advance from the northern Plains tonight to the deep south by Tuesday morning, forcing some enhanced mid level ridging across the Great Lakes. The low level flow will back more toward the west Mon night into Tuesday, allowing the release of some remnant lake stratus into Se Mi. Return flow associated with strong high pressure drifting across the OH/TN valleys Tues into Wed will result in a warming trend across Se Mi the latter half of the week.
400 AM EST Mon Jan 20 2020 High pressure will slowly build into the area through mid week.
1257 AM EST Mon Jan 20 2020 Low pressure will exit across the Maritimes tonight. High pressure will build across the region later Monday through Tuesday.
Cold front has about completely passed through the forecast area as of 2pm ET. A few light showers on ongoing behind the cold front, but even these are quickly clearing the southeast Big Bend as they move east. Expect much colder conditions tonight with widespread temperatures around freezing across the Panhandle and SE Big Bend with colder temperatures in the upper 20s in our Alabama and Georgia counties. Widespread freezes are expected on Monday night and Tuesday night as cold high pressure builds southward. Although the center of the high will remain north of the area, the airmass appears to cold enough to support lows in the upper 20s across a large area with lower 30s along the coast. Since winds will fail to go calm, wind chills each night will fall into the low to mid 20s.
High pressure continues to build in the wake of a cold front, and weak CAA continues in nly winds at around 5-10 mph. /issued 544 PM CST Sun Jan 19 2020/ VFR conditions will continue through the 00Z TAF cycle, as high pressure continues to build in at the sfc. Otherwise, slightly colder temperatures expected on Monday night with lows forecast to fall into the mid 20s across southeast Oklahoma, southwest Arkansas and portions of north Louisiana with slightly warmer near freezing temperatures across east and northeast Texas.
Today: A very quiet day across the region as high pressure drifts southeast over the CWA. Tonight: Mid-lvl heights rise quickly tonight behind the departing upper trough. Soundings suggest that precipitation may fall as a light wintry mix of sleet, freezing rain and snow overnight. The other concern to monitor is the development of stronger flow on the Buffalo ridge as the LLJ intensifies Tuesday evening. Soundings suggest potential wind gusts on the higher elevation areas of the ridge pushing 35-40 knots.
1108 PM CST Sun Jan 19 2020 VFR conditions will continue through the 06Z TAF cycle, as high pressure continues to build in at the sfc. High pressure continues to build in the wake of a cold front, and weak CAA continues in nly winds at around 5-10 mph. Otherwise, slightly colder temperatures expected on Monday night with lows forecast to fall into the mid 20s across southeast Oklahoma, southwest Arkansas and portions of north Louisiana with slightly warmer near freezing temperatures across east and northeast Texas.
805 PM MST Sun Jan 19 2020 Upper ridge building into western Montana. Some high level clouds were rolling over the top of the ridge. High pressure ridging will take hold over the northern Rockies through Tuesday. Afternoon highs Monday will be warmer with lower to middle 40s except 30s east of Rosebud County. Tuesday will see highs in the lower 40s along the Dakota borders to upper 40s along the Beartooth/Absaroka Foothills.
1044 PM EST Sun Jan 19 2020 Winds over the Lower Keys recently made a shift to light northwest winds in advance of a strong cold front that will sweep through the Keys around sunrise. A strong cold front will enter the offshore Gulf waters of mainland Monroe County before dawn, passing the Keys near or soon after sunrise.
Light winds will prevail down in the valleys today while northern Sierra ridgetop winds will see gusts of 50-60 mph before increasing to 80-85 mph on Tuesday as the winter system approaches. Snow levels will generally remain between 5500-6000 feet with snowfall accumulations of 2-5 inches possible Tuesday on northern Sierra passes (Donner, Echo Summit, Carson Pass) with about 1-2" possible for Fredonyer, Brockway, Mt Rose, and ridges through Mono County. This will be more of a wind-maker for the lower valleys with wind gusts of 35- 45 mph across the Tahoe Basin and along the 395 corridor from Walker northward.
An upper ridge over the Rockies will dampen and move east as an upper trough currently off the coast of California quickly moves east along the desert southwest today into tonight. Recent model runs have taken this trough a little farther north, making rain chances in the Big Bend less likely.
922 AM EST Mon Jan 20 2020 Lake effect snow showers will diminish this morning as a ridge of high pressure builds in from the west. This high will dominate the weather through the week, with quiet and cold conditions for the start of the new work week, but a gradual warm up by mid to late week. High pressure is building into the region this morning and this will bring an end to the lake effect snow showers. Surface ridging stays in place Tuesday, however a weak short wave will pass by to our north late Tuesday afternoon and into Tuesday evening. High pressure building across NY and PA will bring quiet weather and progressively milder days.
645 AM EST Mon Jan 20 2020 High pressure will slowly build into the area through mid week.
444 AM MST Mon Jan 20 2020 An upper level ridge will move over the area today, leading to dry weather and temperatures that are generally above average across the southeast plains, Teller county, and in the Upper Arkansas River Valley. Tonight, the upper ridge will shift east of CO as an upper trof moves into the Great Basin.
(Tuesday into Monday) Upper trough will approach Tuesday, with rain chances spreading from west to east in the afternoon. will be Tuesday night, with lift ahead of the trough.
648 AM EST Mon Jan 20 2020 High pressure will slowly build into the area through mid week.
/Issued 338 AM CST Mon Jan 20 2020/ At least a piece of the Arctic ridge has nudged into the region, with another surge of colder air expected this evening as the Arctic high settles across IA/MO.
A ridge of high pressure is moving across Texas this morning with chilly temperatures occurring over the northern gulf coast. Aloft a trough is over the east half of the country with a weak short wave dropping south over the northern plains on the back side of the trough. Cool but clear conditions are expected today and tonight has high pressure moves across the region.
a 1044 mb arctic high pressure continues to feed cold air into the Mid-South on north winds. Chances are by the time the low levels saturate the feature will have just about moved through. Clouds will keep temps from bottoming out with lows in the lower 20s.
A cold front will bring widespread rain and high elevation snow tonight and Tuesday. As a result, some decent high elevation snow accumulations are expected, with over one foot of snow possible in the highest terrain of N Trinity county. An active but progressive weather pattern will continue to result in frequent bouts of precipitation in the coming week, but there are indications that an upper ridge will develop over the W coast late in the week, possibly bringing high temperatures over 60 degrees. High resolution guidance has the wind switching to the Sw and falling off quickly behind the front north of Cape Mendo early Tue, but then ramping up again as a secondary trough approaches in the cooler/more unstable air behind the front.
A warm front extended from eastern MT into southwest NE. Upper level ridge over the Rockies heading eastward. Today/Tuesday, upper level ridge shifts east pushing warm front through entire CWA late tonight into Tuesday morning. Isallobaric forcing tonight along warm front will bring gusty southwest winds over northeast WY into the Black Hills.
306 AM PST Mon Jan 20 2020 A trough of low pressure off the West Coast will continue to spread higher level moisture and clouds across the area through tonight with some sprinkles or light showers possible from late this afternoon through early Tuesday. This trough of low pressure will also bring cooling of high temperatures through Tuesday.
With the lack of any significant QPF, no accumulations are expected, but even if the flurries slack off early this afternoon, we could get another round tonight as the main energy of an upper level low swings through the region.
/issued 420 AM CST Mon Jan 20 2020/ High pressure resides east of the area this morning and will continue to push to the east through the morning. This ridging will give way to short wave troughing tomorrow morning as the next system approaches the region.
Ridging will build over the area today, and with the cold start this morning, we will have a colder than normal day with highs ranging from 10-15 over most of northern MN, and 15-20 for northwest WI and EC MN. Late today and tonight warm air advection sets in aloft, which continues into Tuesday as the mid and upper level ridge axis slowly shifts east of the area. Tuesday high temperatures to rise near to above normal despite the cloud cover, with highs in the low to mid 20s for most locations.
Cooler air advecting in, combined with mostly clear skies this morning has temperatures dropping into the 30s and upper 20s.
Have brought morning lows back up into the low 20s to reflect this change, but wind chills still are making it feel like temperatures are in the low teens to upper single digits. If it hangs around most of today, we may not see temperatures rise above freezing. Arctic high pressure shifts out of the Northern Plains across to the eastern states through the first half of this week. Meanwhile, an upper-level trough is going to swing across the Tennessee Valley and try to wring out limited moisture into precipitation Monday night into Tuesday morning.
we should see quite a bit of sunshine today as an upper level ridge axis approaches the area from the west. Some low clouds and freezing fog are possible from Wray to Goodland and Leoti after midnight as boundary layer moisture increases. Low temperatures are expected to range from around 10 degrees in the east to the low 20s in the west. The high temperature forecast will be difficult as some arctic air may still be in place, precipitation possibilities and extensive cloud cover. Low temperatures in the low 20s to around 30.
High pressure will move east today, allowing a series of weak weather systems to pass through the region through midweek. High pressure will return late in the week.
946 AM EST Mon Jan 20 2020 Northwest flow aloft and a large area of high pressure at the surface building southeast from the Upper Mississippi Valley will bring a lengthy string of dry days this week.
on the back edge of an upper trough and arctic airmass extending from the Hudson Bay south and west towards the Missouri River.
Northwest flow between a western ridge and eastern trough will keep cold air pouring into the region through Tuesday as the core of Arctic high pressure builds southeast from the northern Plains and Upper Midwest into the lower Ohio and middle Mississippi valleys. There's still some question as to how much impact the dry air in the low levels will have on any potential sublimation of ice crystals. A warming trend will begin on Tuesday as the core of high pressure begins to shift east of the area.
623 AM EST Mon Jan 20 2020 Lake effect snow showers will diminish this morning as a ridge of high pressure builds in from the west. This high will dominate the weather through the week, with quiet and cold conditions for the start of the new work week, but a gradual warm up by mid to late week. High pressure is building into the region this morning and this will bring an end to the lake effect snow showers. Surface ridging stays in place Tuesday, however a weak short wave will pass by to our north late Tuesday afternoon and into Tuesday evening. High pressure building across NY and PA will bring quiet weather and progressively milder days.
508 AM EST Mon Jan 20 2020 Currently - A strong cold front is racing southward into the southeastern Gulf of Mexico early this morning. Short Term Update - A sprawling high pressure descending down the plains will drive the cold front through the Keys today. Rain chances will decrease gradually through the day as steadily drier air arrives behind the cold front. However, the background flow will gradually strengthen as the high builds into the eastern United States.
A ridge over the region is causing stable conditions with valley fog and haze. Today some high clouds are streaming over that ridge and will help to reduce the effectiveness of the sun at mixing those out today. So low clouds, fog, and haze could remain entrenched in the valleys of western Montana and central Idaho until a cold front arrives Tuesday evening.
Another day of wide ranging temperatures is expected again today with highs ranging from the low 30s across central Kansas to mid 50s across far southwestern Kansas. Lows tonight are progged to range from the low teens across central Kansas to upper 20s across far southwestern Kansas.
Will need to watch for strong winds on the Buffalo Ridge Tuesday and Tuesday night. Longer term concerns remain P-type issues with the midweek system and then model differences with upper low development following that system for the end of the week. Strong southerly winds develop ahead of the next short wave trough and weak surface system over the Dakotas Tuesday night.
Clear skies prevail through much of the day as high pressure slowly moves eastward, giving way to H5 ridging as we head into Tuesday. Tuesday brings much warmer temperatures to the region as the western ridge builds eastward. Highs are expected to climb into the lower 20s in the Lake of the Woods region with near 30 degrees in the southern James Valley, closer to the ridge axis.
Mid level ridge axis will be in place in WI for Tuesday.
An upper level low will slide south across the northern plains and across Missouri through today and into tonight. With cold temperatures in place across the area, highs will be between 20 and 32 degrees, the upper low moving south will work to squeeze out some flurries or light snow across portions the region. As the low moves through south through tonight, snow is expected with areas from the Lake of the Ozarks to West Plains and north seeing the best chance for some light snow accumulations. This will allow temperatures to fall into the lower to middle teens area wide tonight. Upper level ridging will move across the area Tuesday allowing for a sunny day with temperatures on a warming trend as surface winds begin to shift out of the south by Tuesday night. As the ridge shifts east.
527 AM EST Mon Jan 20 2020 Northwest flow aloft and a large area of high pressure at the surface building southeast from the Upper Mississippi Valley will bring a lengthy string of dry days this week.
943 AM EST Mon Jan 20 2020 High pressure will slowly build into the area through mid week.
349 AM CST Mon Jan 20 2020 Freezing temps are expected around sunrise for several locations on the north shore this morning. Tonight may be different as below freezing temps should be found over the majority of the area. Even south shore locations will get in on this with temps right at freezing. The below freezing temps will last the longest over the northern half of the area and could be from 6 to 8 hours. The south shore locations that get to or just below freezing should only be 2 to 3 hours Tuesday morning.
Clouds will dissipate overnight as high pressure builds into the area. Today Through Tuesday A large upper ridge is over the Rockies this morning with northwest flow over Arkansas. A weak upper trough will move through the midwest and clip northeast Arkansas this afternoon and evening. The upper ridge will move into Arkansas Tuesday. High pressure quickly moves into the area behind the system. Highs will be cooler today in the mid 30s to upper 40s, and then mid 30s to mid 40s for Tuesday.
300 AM PST Mon Jan 20 2020 Some light precipitation possible across the higher elevations of the northern Sierra today, otherwise mostly cloudy conditions. Upper ridge has shifted east with with satellite imagery showing considerable mid and high clouds moving up from the southwest ahead of a weak weather system. The higher elevations of the northern Sierra may see a few sprinkles or light showers today as the weak system moves through.
525 AM EST Mon Jan 20 2020 Snow should end today as high pressure builds in.
520 AM EST Mon Jan 20 2020 Currently - A strong cold front is racing southward into the southeastern Gulf of Mexico early this morning. Short Term Update - A sprawling high pressure descending down the plains will drive the cold front through the Keys today. Rain chances will decrease gradually through the day as steadily drier air arrives behind the cold front. However, the background flow will gradually strengthen as the high builds into the eastern United States.
806 AM EST Mon Jan 20 2020 Snow should end today as high pressure builds in.
The high will shift east with a southwest wind kicking in on the back side. Mid level ridge axis will be in place in WI for Tuesday.
Expect overnight lows to drop below freezing areawide with the vast majority of the area in the mid to upper 20s by early Tuesday morning.
642 AM EST Mon Jan 20 2020 Northwest flow aloft and a large area of high pressure at the surface building southeast from the Upper Mississippi Valley will bring a lengthy string of dry days this week.
Today Through Tuesday A large upper ridge is over the Rockies this morning with northwest flow over Arkansas. A weak upper trough will move through the midwest and clip northeast Arkansas this afternoon and evening. The upper ridge will move into Arkansas Tuesday. High pressure quickly moves into the area behind the system. Highs will be cooler today in the mid 30s to upper 40s, and then mid 30s to mid 40s for Tuesday.
The lowest visibilities are along the western or leading edge. Clear skies prevail through much of the day as high pressure slowly moves eastward, giving way to H5 ridging as we head into Tuesday. Tuesday brings much warmer temperatures to the region as the western ridge builds eastward. Highs are expected to climb into the lower 20s in the Lake of the Woods region with near 30 degrees in the southern James Valley, closer to the ridge axis.
Dry weather through the rest of the work week as a ridge of high pressure builds, which will also be conducive to morning fog in the valley. Precipitation is possible in the Sierra Nevada this afternoon through tomorrow afternoon for Fresno County and northward, but model guidance is showing QPF totals to be scant as the main precip will be further north, associated with the upper low.
338 AM CST Mon Jan 20 2020 At least a piece of the Arctic ridge has nudged into the region, with another surge of colder air expected this evening as the Arctic high settles across IA/MO.
Arctic high pressure ridge moves over the area tonight.
Do anticipate for a slightly cooler night for tonight into Tuesday morning as less cloud coverage is expected compared to the current early morning hours this morning as a mixture of mid-to-high level clouds have kept the temperatures slightly elevated compared to previously forecasted. The high temperatures will trend in the mid 60s today while the highs increase to around 70 degrees on Tuesday.
Low stratus will persist this morning, but subsidence aloft will increase behind the wave heading into this afternoon as high pressure builds in at the surface and aloft. Highs today will be a tad warmer than yesterday, ranging from teens/low 20s east of the Mississippi to teens west.
254 AM MST Mon Jan 20 2020 Ridge of high pressure will be over the area today into tomorrow for warmer and dry conditions.
234 AM MST Mon Jan 20 2020 Bitter cold air mass will move to the east today as an upper ridge moves into eastern Montana. Ridge moves to the east tonight and weak waves on SW flow aloft will bring mid and high level clouds tonight that combined with the warmer air mass will keep temperatures warmer than they have been for the last several nights. Almost all areas will have highs above freezing on Tuesday as warmer air will be firmly in place.
This is due to lingering low level moisture and cyclonic flow from the departing low pressure system. Clouds will gradually scatter out today as drier air and high pressure wedge into the area. High pressure spreading into the Great Lakes from the Northern Plains will bring light winds to the region through Tuesday morning. The high will shift east with a southwest wind kicking in on the back side. Mid level ridge axis will be in place in WI for Tuesday.
420 AM CST Mon Jan 20 2020 High pressure resides east of the area this morning and will continue to push to the east through the morning. This ridging will give way to short wave troughing tomorrow morning as the next system approaches the region.
309 PM EST Mon Jan 20 2020 Northwest flow aloft and a large area of high pressure at the surface building southeast from the Upper Mississippi Valley will bring a lengthy string of dry days this week.
203 PM CST Mon Jan 20 2020 Surface ridging finally starts to wane Tue.
347 PM EST Mon Jan 20 2020 A light flow off Lake Ontario will still keep a few clouds and flurries around parts of central New York this week, but for the most part high pressure will dominate the weather with mainly quiet conditions. Previous Discussion: 145 PM Update: High pressure building into the region will offer up mainly dry and cold conditions for the bulk of our forecast area in the near term.
NE winds continue with high pressure to the north. Mixing is once again stronger than expected so look for temperatures to reach the low 60s for high temperatures today.
As the ridge axis aloft moves off to our east, southwest flow aloft will develop, with increasing middle and high level cloudiness across our counties. With cloud cover, temperatures at most locations will be a bit warmer than the previous night.
139 PM MST Mon Jan 20 2020 Warmer air is flowing into the region this afternoon as the upper ridge builds over the region from the west.