Aikyam-Lab/Synoptic-Bench huggingface dataset:
A passing low will deliver slightly cooler temperatures and chances for very light precipitation on Tuesday.
Little additional snowfall will occur throughout the Central Ridge and Valley region where some periods of light snow/snow showers will occur late this afternoon and early this evening. The lake Effect and upslope snow across the Western Mountains of the state will diminish Tuesday morning followed by fair weather as a ridge of high pressure drifts overhead.
Tonight, aforementioned short wave continues to move east- southeast through the flow while aforementioned low and its affiliated cold front continue to settle east-southeast. The strong cold front will make its entrance towards early morning, but ahead of the front temperatures may hold steady, possibly increasing southwest. Winds will be on the increase, as a strong pressure gradient develops between the low and the aforementioned high that will spread into the Prairie Provinces. The exception to this is north central North Dakota into the James River Valley where temperatures were cooler, and some fresh snow fell a few days ago. The warmer part was over the southern James River Valley, but emergency management passed on that there is some crust on the snow, but 50 mph wind gusts could easily overcome it.
108 PM EST Mon Jan 17 2022 Low pressure moving across the Mid-Atlantic region will result in lingering snowfall today. Additional accumulation of 2-3 inches is possible tonight in the WV ridges and Laurel Mountains, with limited accumulation elsewhere. Wind gusts up to 35 mph have been observed across the area, and the Winter Storm Warning has been extended for the higher elevations of PA, and northern WV in response to additional snow accumulation, and blowing snow causing low visibility and hazardous roadways. Benign weather will return tuesday as winds calm, high pressure builds, and temperature moderates.
930 AM PST Mon Jan 17 2022 Low pressure off the Southern California coast will move inland tonight through Tuesday. The clouds and a developing marine layer near the coast will result in cooler weather today, with the cool weather continuing Tuesday. Dry and warmer weather will return for the second half of this week under a strong West Coast ridge, along with weak to moderate Santa Ana Winds. The upper low, about 200 miles west of Point Conception, was moving east and should track over the Mojave Desert tonight and to northwestern Arizona Tuesday morning. A few inches of snow could fall near the highest peaks of the San Bernardino County Mountains but the snow level will mostly stay at/above 7500 feet MSL. Ridging will occur off the coast the second half of the week with northerly flow aloft over California.
This trough will continue moving eastward throughout the day today, pushing off the Eastern Seaboard by late tonight/early Tuesday morning. At the surface, high pressure will remain in control throughout the period. Northwesterly winds will relax by tonight as the high moves over the local area. Winds turn southerly, but remain light, as the high shifts eastward and moves into the western Atlantic. Highs today will mainly be in the 50s, however, northeastern communities that remain underneath the cloud deck may run cooler than expected. Highs tomorrow will be a bit warmer due to the southerly wind shift.
Under clear skies tonight, and with high pressure sliding over the region tonight, temperatures should be able to radiate down to around freezing - the lower 30s and upper 20s. Given the uncertainties in fog as well as temperatures only being just near freezing, will not mention freezing fog at this point in time. Temperatures will trend warmer again tomorrow, with max temps in the mid 50s to mid 60s.
332 PM EST Mon Jan 17 2022 Discussion/Marine -Lake effect freezing drizzle event ongoing Light freezing drizzle has been causing some travel impacts today based on the MDOT MiDrive map info (which shows traffic speeds/accidents) and calls with various road commissions and county central dispatch centers. Have therefore extended the winter wx advisory for areas near and south of I-96 through 10 pm although confidence not high going forward regarding the overall extent of freezing drizzle and impacts.
By Tuesday night, the NAM/GFS is showing a trough dropping into northern Plains/Upper Midwest which will cause an attendant cold front to move southeast across the CWA during the late evening and overnight.
228 PM CST Mon Jan 17 2022 For tonight, the clouds will be on the increase as a warm front moves through much of the region.
218 PM EST Mon Jan 17 2022 The area of low pressure and cold front that moved through the area yesterday continue to track northeastward over New England. High pressure builds in behind this system advecting some cooler and drier air over west central and southwest Florida for the next 48 hours. These cool temps will continue tonight with some freezing temperatures possible over the inland areas from Citrus County northward.
1011 AM MST Mon Jan 17 2022 Sent an update this morning to provide near, short-term forecast details regarding cold front / wind timing for overnight tonight through Tuesday. Looks to be quite a pronounced cold front. Snow associated with tomorrow's cold front will be disorganized and patch at best - roughly a trace up to half an inch of accumulation for most locations. BMickelson Previous discussion: Northwest flow between the Hudson Bay low and west coast ridge will persist through the week across northeast Montana. The first wave will send an Alberta clipper through the northern plains and drop a cold front into Montana late tonight. Strong cold air advection through the day will keep the winds up as high pressure pushes in behind the front.
336 PM EST Mon Jan 17 2022 Latest surface analysis shows low pressure over the northeast US and high pressure over eastern TX. Perhaps up to an additional half inch of snow is possible at the higher elevations through tonight. Locally, this will result in a warmer S/SW flow across the area.
Overnight lows are expected to drop tonight into the mid to upper 20s for the general forecast area, with locations in the NE mountains dropping to the low 20s and teens, roughly 5 degrees below normal. Winds at ATL are usually the highest around and have fallen in Wind Adv criteria throughout the day. Tuesday looks to be quiet as we are dry and mostly clear as ridging prevails. The resultant afternoon highs moderate warmer though stay several degrees below climo as most locations look to make it to the upper 40s to 50s.
The onset of precipitation tonight will consist mainly of snow, however some freezing rain will be mixed in at times across northwest Montana. Once the relatively cold east winds set in across northwest Montana by midday Tuesday, the freezing rain threat should quickly dissipate.
A change from the stagnant ridge pattern is in store tomorrow as the stubborn Rex Block pattern finally breaks down with the close upper low over southern California finally filling and the upper ridge weakening. The upper ridge axis shifts well offshore with a weak front moving down the back side of the ridge. This ridge pattern is significantly weaker than models have been indication for the past several days, with precipitation possible reaching as far south as extreme northwest Siskiyou county tomorrow afternoon.
The flow regime underneath advancing high pressure resembles a combination of drainage and radiational conditions. High pressure will continue to track eastward just north of the local area, bringing light northerly winds less than 10 MPH that will turn to northeasterly by the afternoon. High pressure over the southeast U. The onshore flow will begin to modify the cooler airmass, with lows not quite as cold as Tuesday morning, but still chilly, falling into the 40s over much of the area, except upper 30s across N Lake/NW Volusia counties by daybreak Wed. Low level winds will continue to veer to the S/SW through mid-week as ridge axis builds down across the region. High pressure ridge will settle southward across the area through mid-week, with winds up to 10-15 knots gradually becoming more southerly into Wed, and S/SW into Thu.
626 PM EST Mon Jan 17 2022 Light freezing drizzle mixed with very light freezing rain and snow will continue to cause icy conditions through the evening. Lows tonight will be in the lower 20s.
Otherwise mostly dry and mild this week with high pressure in control. An upper level low that has been off the SoCal coast since last week continues to pump moisture over region. One difference from last week to now is the upper low has finally inched its way closer to the coast. Cloud cover has been a little thicker in some spots, especially in the North Bay, so temperatures for this afternoon have been nudged slightly cooler. Given the ample moisture in the low levels patchy fog will be of concerns. Once the passing/weakening upper low moves eastward tonight and Tuesday upper level ridging begins to develop over the EPAC. The ridge will shift the storm track farther north once again. Additionally, the ridge nudges north to BC as an upper level low dives through the Great Basin.
404 PM EST Mon Jan 17 2022 Upper air pattern consists of a 500 mb closed low over eastern PA with a ridge over the Rockies and a closed low off the CA coast this morning. A trough drops into the Canadian Rockies tonight and into the Canadian Prairies on Tue morning. SE gales of 35 to 40 knots look possible Tuesday evening across the east half, as a low pressure system deepens over the lake.
415 PM MST Mon Jan 17 2022 It will remain warm and breezy across the area this evening until a cold front pushes through the area. Behind this cold front, light snow will develop, with a few areas picking up an inch or two of snow tomorrow morning, potentially causing a few issues for the morning commute.
The Upper Yampa and Gunnison Basin are other areas running cooler than 24 hours ago.
Expect lows in the 20s over most of the plains and teens in the high country. High temperatures are expected to be a few degrees cooler than Monday due to increased cloud cover. A cold front approaches in the afternoon resulting in a push of gusty northerly winds over mostly the eastern plains/NE corner.
627 PM EST Mon Jan 17 2022 Fair and seasonably cool with warming into mid week ahead of an approaching cold front.
Winds are forecast to diminish slowly tonight over most of the local waters and land areas as the low pressure system that affected the region scurries northeast.
Calm winds and low dew point depressions may also allow for patchy freezing fog to develop as temperatures fall into the low 20s by tomorrow morning. The freezing fog is not expected to be widespread, nor dense, so a freezing fog advisory will not be issued. However, caution should be taken when driving tomorrow morning due to isolated slick spots on roads, particularly elevated surfaces like bridges and overpasses. This will allow warm advection to ensue and taking temperatures into the lower 50s central and east, and upper 40s to around 50s west. The snow may hamper warming a few degrees in the higher elevations east.
924 PM EST Mon Jan 17 2022 Low pressure will continue lifting away from the area into New England tonight.
357 PM MST Mon Jan 17 2022 Active NW flow will persist as mean western NOAM ridging directs impulses into the Northern Plains along an anchored baroclinic zone. Flurries and clouds may linger through Wed across the SW third before a warm front shifts back NE Thur into Fri with the next upper trough.
943 PM EST Mon Jan 17 2022 High pressure and cool and dry air will remain over the region through the middle of the week, producing a more typical January pattern.
(This afternoon through Tuesday night) Highs will remain on the warm side for SE NM and West TX under a modest mid-level ridge presence over the southern plains. Given the forecasted positioning of the low-level thermal ridge, the eastern Permian Basin down to the Lower Trans-Pecos will trend the warmest tomorrow with avg 15-20 degrees above-normal for the corridor. Lows will be on the mild side overnight due to persistently warm boundary layer temps and southerly winds keeping temps above the freezing mark for basically everyone, except Marfa/Tatum due to better decoupling factors. Cold front will flirt with the northern tier of the forecast area by the end of the short term cycle.
523 PM CST Mon Jan 17 2022 A large and powerful cyclone is pummeling the northeast CONUS ahead of a broad upper trough traversing across the eastern half of the country.
High pressure looks to build over the Great Basin, leaving us with above-normal temps and northerly winds for the rest of the week. Satellite imagery shows a cut-off low pressure system moving towards the southern California coast. Meandering off-shore for several days, the low has been trapped underneath a longwave ridge. North of the circulation, easterlies have weakened and wind barbs upstream of the ridge axis are beginning to turn into the low. As this process continues, the low will advance into the Desert Southwest Monday night, producing precip chances for the southern half of the CWA into Tuesday evening. 1" in the low elevations and 0. 5" in the high terrain. 1" in the low elevations and 0. 25" in the high terrain.
729 PM EST Mon Jan 17 2022 The patchy light snow and light freezing drizzle will continue to diminish this evening.
556 PM CST Mon Jan 17 2022 For tonight, the clouds will be on the increase as a warm front moves through much of the region.
Light drainage winds off the Sandhills and generally clear skies overnight should facilitate the cooler lows. However, a strong cold front will move thorugh by Tuesday afternoon with gusty winds ushering much colder air into the region Tuesday night.
434 PM MST Mon Jan 17 2022 The dry northwest flow aloft will continue today as general ridging remains across the western US.
However, a strong cold front will move thorugh by Tuesday afternoon with gusty winds ushering much colder air into the region Tuesday night.
234 PM MST Mon Jan 17 2022 The dry northwest flow aloft will continue today as general ridging remains across the western US.
Ridge of high pressure is inching east across the Mississippi River Valley this evening helping to clear out low clouds across the region. Lowered temps north of the Illinois River Valley to the 25th percentile of the NBM where favorable radiational cooling under the ridge axis and recent snow pack will allow temps to crater into the mid possibly lower teens tonight. Elsewhere, except temps to bottom out in the high teens to lower 20s. 19z surface map indicated a ridge axis from eastern TX up through MN, with deep 982 mb low pressure over the interior northeast U. With the ridge axis shifting overhead, winds will become lighter and back southwest. A cold front trailing south of the clipper shifts across the area Tuesday night, but this is moisture-starved and no precip is forecast.
130 PM PST Mon Jan 17 2022 Low pressure off the Southern California coast will move inland tonight through Tuesday. The clouds and a developing marine layer near the coast will continue the cooler weather through Tuesday. Dry and warmer weather will return for the second half of this week under a strong West Coast ridge, along with weak to moderate Santa Ana Winds. The upper low, about 200 miles west of Point Conception, was moving east and should track over the Mojave Desert tonight and to northwestern Arizona Tuesday morning. A few inches of snow could fall near the highest peaks of the San Bernardino County Mountains but the snow level will mostly stay around or a little above 7500 feet MSL. Ridging will occur off the coast the second half of the week with northerly flow aloft over California.
531 PM CST Mon Jan 17 2022 (This evening through Tuesday) Expect warm and dry conditions Tuesday due to low level southwest flow and a thermal ridge in the area.
Fast gradient flow over southeast Wyoming is currently resulting in gusts in the low to mid 50mph range across the northern Snowy Range foothills. This event will arrive in the form of a cold front on Tuesday evening and overnight. Some forecast guidance, most notably the HRRR does depict a brief window for some freezing drizzle early in the event on Tuesday evening, assuming a warm nose above the surface front/cold pool can remain in place.
Upper level trough moving down from the northwest reaching Western Washington later tonight into Tuesday.
712 PM EST Mon Jan 17 2022 An upper trough over Pennsylvania will lift out tonight and Tuesday, as surface ridging builds in from the Great Lakes.
The benign weather pattern due to high pressure will continue through Tuesday.
Low pressure off the Southern California Coast will move onshore tonight bringing some shower activity to the Central CA Interior. The low will move east with high pressure building over the region. As high pressure becomes established the San Joaquin Valley will once again have periods of fog while the remainder of the area remains generally dry and clear. Low pressure area about 100 miles west of Point Conception is drawing mid and upper level moisture north producing some scattered shower activity over the which stretches from Merced south across the central coast. High resolution modeling bring the upper low onshore over Kern County tonight.
408 PM EST Mon Jan 17 2022 Light freezing drizzle mixed with very light freezing rain and snow will continue to cause icy conditions through the evening. Lows tonight will be in the lower 20s.
700 PM EST Mon Jan 17 2022 Cold high pressure will continue to build into the region tonight and drift across the southeast U. /issued 218 PM EST Mon Jan 17 2022/ The area of low pressure and cold front that moved through the area yesterday continue to track northeastward over New England. High pressure builds in behind this system advecting some cooler and drier air over west central and southwest Florida for the next 48 hours. These cool temps will continue tonight with some freezing temperatures possible over the inland areas from Citrus County northward.
The net result of this ongoing pattern change will be a strong ridge off the west coast and mean trough position through central and eastern states much of the rest of the month. As usual we will be on the cusp of the most significant weather, with the front side of the ridge and the back side of the trough vying for control of SE AZ.
Closer to the coast (including the Houston Metro), lows should range from the mid 40s inland to the lower 50s at the immediate coast. But even with the increasing cloud cover, highs tomorrow to warm into the lower and mid 70s. For tomorrow night, expect lows in the upper 50s north to the the lower 60s at the beaches.
628 PM EST Mon Jan 17 2022 Aviation -Lake effect freezing drizzle event ongoing Light freezing drizzle has been causing some travel impacts today based on the MDOT MiDrive map info (which shows traffic speeds/accidents) and calls with various road commissions and county central dispatch centers. Have therefore extended the winter wx advisory for areas near and south of I-96 through 10 pm although confidence not high going forward regarding the overall extent of freezing drizzle and impacts.
A cold front will sweep southeast across the area on Tuesday, with strong CAA and a tight sfc gradient developing behind the low. So the main threat is probably just some low level drifting snow, with maybe some patchy blowing snow over the Coteau where temperatures have been a bit cooler. Lastly little to no measurable pcpn is expected with this cold front as it tracks across the region Tuesday.
201 PM MST Mon Jan 17 2022 It will remain warm and breezy across the area this evening until a cold front pushes through the area. Behind this cold front, light snow will develop, with a few areas picking up an inch or two of snow tomorrow morning, potentially causing a few issues for the morning commute.
This will manifest itself over northeast Montana as a distinct cold front.
Water vapor imagery this afternoon showing a deep trough over the eastern CONUS with a developing ridge upstream off the west coast. Also noted was a cut off low pressure system off the CA coastline. At the surface, high pressure ridge just east of the CWA was displacing eastward with stout warm air advection following behind resulting in a few locations over the western CWA pushing into the lower 50s.
542 PM CST Mon Jan 17 2022 High pressure centered over southeast Arkansas at this time will move slowly east tonight.
Clear skies and full moon tonight with a quick cool down into the 40s inland and dipping into the lower 50s on the coast.
747 PM EST Mon Jan 17 2022 High pressure and cool and dry air will remain over the region through the middle of the week, producing a more typical January pattern.
The weak upper low that has been drifting off the California coast for a while is finally moving inland. The upper low will continue to open up into wave as it moves east into northern Arizona during the day. Eastern Pacific upper ridge will build eastward over California through the week with a slight warming trend. Conditions for fog formation will become more favorable through the week, as the high builds overhead with light winds and clear skies.
/Issued 222 PM CST Mon Jan 17 2022/ /Tuesday Night Onward/ Our next potent cold front will make its final approach Tuesday night.
Quiet short term weather under northwest flow aloft and weak leeside troughing over eastern Colorado.
903 PM PST Mon Jan 17 2022 Low pressure off the Southern California coast will move inland tonight through Tuesday. The clouds and a developing marine layer near the coast will continue the cooler weather through Tuesday. Dry and warmer weather will return for the second half of the week with periods of weak to moderate Santa Ana Winds.
The center of the low is expected to quickly move at an east- southeasterly trajectory through the state over the next several hours, crossing into Minnesota by mid-morning.
228 AM CST Tue Jan 18 2022 Primary forecast concern is the Arctic cold front moving through later today, bringing much colder temperatures, bitterly cold wind chills, some blowing/drifting snow, and the potential for freezing of meltwater on roads and other surfaces. The cold front will sweep across the area this afternoon into early evening, with gusty northwest winds and plummeting temperatures. Temperatures will warm above freezing across the entire area today (except perhaps the far northwest where it will top out around freezing) before temperatures fall behind the front.
348 AM EST Tue Jan 18 2022 High pressure and cool and dry air will remain over the region through the middle of the week, producing a more typical January pattern.
156 AM EST Tue Jan 18 2022 An upper trough over Pennsylvania will lift out tonight and Tuesday, as surface ridging builds in from the Great Lakes.
Models show this low-level moisture below an unsaturated DGZ persisting through mid-morning. Can't rule out very light snow grains or freezing drizzle as a result, though the signal for enough lift to generate this precipitation is less than yesterday.
308 AM EST Tue Jan 18 2022 The short term portion of the forecast will feature dry and warmer weather for most of the period, as high pressure takes charge of area weather today and tonight.
1153 PM CST Mon Jan 17 2022 A large and powerful cyclone is pummeling the northeast CONUS ahead of a broad upper trough traversing across the eastern half of the country.
1057 PM CST Mon Jan 17 2022 (This evening through Tuesday) Expect warm and dry conditions Tuesday due to low level southwest flow and a thermal ridge in the area.
It will remain warm and breezy across the area this evening until a cold front pushes through the area. Behind this cold front, light snow will develop, with a few areas picking up an inch or two of snow tomorrow morning, potentially causing a few issues for the morning commute.
A passing low will deliver slightly cooler temperatures and chances for rain and snow showers on Tuesday.