Aikyam-Lab/Synoptic-Bench huggingface dataset:
329 AM EST Sun Jan 9 2022 Southerly flow will bring warmer air and moisture to the area today with a cold front and showers crossing the area tonight.
Winds will decay with high pressure moving in, although KMAF could remain gusty into sunset before decoupling. As to be expected with this front, Sunday will be noticeably cooler than today, with afternoon temperatures ranging from the upper 40s to middle 50s for most, with 60s and lower 70s confined across the Rio Grande Valley and through the Big Bend Area.
1143 PM EST Sat Jan 8 2022 Rain, with a period of freezing rain northeast of Pittsburgh, can be expected as a front approaches and crosses on Sunday.
1242 AM EST Sun Jan 9 2022 A strong cold front accompanied with showers, will approach from the NW today, crossing the coast tonight. Bitterly cold high pressure will follow through mid period. High slides offshore tonight but continues ridging down into the local area, leading to light NE flow and mostly clear skies until some increasing clouds late. Continued dry then for daytime Sunday ahead of the next cold front. Alberta Clipper system drags a cold front across the area quickly Sunday night.
1010 PM CST Sat Jan 8 2022 Southerly flow continues to advect warm, moist air into the area this afternoon with freezing drizzle and patchy fog possible into tonight. A cold front currently stretching from southeastern South Dakota to the Arrowhead of Minnesota is slated to traverse the forecast area this evening into tonight. Ahead of the cold front, southerly flow continues to advect warm, moist air into the region with freezing drizzle and patchy fog starting to impact northeast Iowa and southwest Wisconsin. Areas of patchy fog are likely until the cold front scourers out the low-level moisture currently in place. Behind the front, cold, arctic air will return with wind chills slated to drop into the low/mid 20's in the northwest and low teens in the southeast.
254 AM CST Sun Jan 9 2022 Quiet weather across the High Plains with early morning satellite imagery showing just some patchy mid clouds along with some lower stratocumulus from the sandhills into the panhandle of Nebraska. Expect today will be a bit cooler than yesterday with highs generally in the middle 30s to around 40 degrees with an afternoon breeze to contend with. However with a high amplitude upper trof over the western US starting to push eastward, we can expect quiet weather to continue as a trend toward warming temperatures becomes established.
153 AM EST Sun Jan 9 2022 On Sunday, warm and moist air will begin to move in ahead of a cold front.
929 PM PST Sat Jan 8 2022 Fair weather is expected through Sunday as an area of high pressure strengthens over California.
Cold front is expected to move into northern parts of the area Sunday morning and off the coast in the late afternoon and early evening hours. Models are coming in a little faster with the passage of this next cold front - over our northern counties just after sunrise and at/ just off the coast around noon.
1028 PM MST Sat Jan 8 2022 Water vapor shows positively tilted trof extending from the Desert SW through the Northern Rockies/Plains. At the surface, associated cold front has swept through the entire forecast area with gusty northwest winds and steady or slowly falling temps as 1028mb arctic high builds southeast from southern ALTA. Warm front begins to move northeast across the region on Sunday with highs generally back into the 30s to lower 40s. Dry and mild conditions will then prevail through mid week as upper ridge covers the Northern Rockies.
(Today and tonight) Another strong cold front has moved through the area overnight with gusty north winds that will continue through the day.
An upper level trough will cross the Central Plains today as an area of high pressure at the surface builds into western Kansas.
Cold front is expected to move into northern parts of the area Sunday morning and off the coast in the late afternoon and early evening hours.
Winds will slowly relax through the afternoon as high pressure begins to approach, but it will remain breezy through the day.
Last night was warmer than forecast, and lows for tonight were set warmer than guidance. Southeast surface winds in the Snake Basin should keep fog out, except in the lower Treasure Valley and the valleys of northern Malheur County where it is already forecast. Upper ridge will dominate the next several days with mild temps at higher elevations and an inversion in the colder lower valleys.
Breezy northerly winds early in the day will relax as high pressure settles across the area this afternoon. Light southwest to westerly winds will return tonight as high pressure sinks southward across the Southern Plains leading to a chilly night with lows in the teens for most areas. The mid/upper ridge across the Central Great Basin area is progged to build eastward toward the Rockies early in the week leading to dry and seasonably mild air across the central CONUS within a northwesterly flow regime.
132 AM EST Sun Jan 9 2022 Rain, with a period of freezing rain northeast of Pittsburgh, can be expected as a front approaches and crosses this morning.
427 AM EST Sun Jan 9 2022 Rain, with a period of freezing rain northeast of Pittsburgh early this morning.
448 AM CST Sun Jan 9 2022 Scattered/widespread SHRA/TSRA are ongoing this morning across much of central to SRN AR ahead of an approaching cold front. The cold front will drop south through the state by early this afternoon. Today Through Monday Night A warm front lifted north into central sections of the CWA Sat evening. A cold front was beginning to drop SE into NWRN AR early this morning. Regional radar imagery depicts scattered SHRA and a few TSRA generally long/south of the warm front. Temps south of the warm front were in the 60s. The aforementioned cold front will pick up SWD momentum later this morning. but maybe a deg or 2 warmer.
(Today through Tuesday) A weak cold front meanders around southern Florida emanating from an area of low pressure off New England and the Canadian maritimes.
Even with temperatures above freezing initially across much of south central and southeast Kansas, wetbulb profiles suggest temperatures will remain below 3C or approach freezing in the shallow surface warm layer supporting a quick transition to snow once the precipitation begins to ramp up toward midday or early afternoon. Due to the transient nature of the mesoscale forcing and quick movement of the mid/upper trough as well as the Nov sun angle and relatively warm soils, most locations are expected to see an inch or less of accumulation. Much below normal temperatures will prevail through the period as we remain within a larger-scale mid/upper trough across the central CONUS. VFR conditions overnight with deteriorating cigs/vsbys on Monday with approaching upper trof expected to bring a round of light snow to the region.
Aloft, a flat ridging builds over the Florida Peninsula with mostly zonal flow. At the surface, broad high pressure system builds in over the east coast bringing a drier airmass into the region after the passage of the cold front. On Tuesday night, we will start to gradually transition to moist airmass as another cold front pushes down into the Florida Peninsula.
1011 PM EST Sun Nov 13 2022 High pressure will bring dry and continued cool conditions to the region on Monday. The next chance for precipitation will arrive later Monday night into Tuesday as a low pressure system moves into the Ohio Valley. Mid level flow backs westerly with broad ridging building across the area overnight into Monday. Low temperatures will vary from the upper teens in areas that clear to the lower and middle 20s where clouds linger. The low pressure is splitting Tuesday morning with one half developing off the East Coast and the other slowly moving through the area during the day Tuesday. Impacts to travel Tuesday morning: Early morning snow chances and road/ground temperatures near freezing create some concern for slick spots for the Tuesday morning commute.
Cooler than normal temperatures will continue into this week across the Inland Northwest.
The lower ECMWF and Canadian QPF solutions seem under done given the dynamics with this feature. Lowest temperatures tonight will range from the lower to middle 30s from north to south.
Low temps tonight will be in the lower to mid 20s across the north, mid to upper 20s across the rest of the state. Cooler than average temps are forecast to continue in the coming days, with highs in the 40s and 50s and lows in the 20s and 30s. The wintry mix will transition to snow over the higher elevated terrain. Higher totals are possible in the higher elevations in the Ozarks.
225 AM EST Mon Nov 14 2022 Cold high pressure will continue to build across North Carolina today. Broad high pressure sits across the eastern United States. Overnight lows should range from freezing to the lower 40s in the southeast.
Satellite imagery showing well defined cut-off low along the Oregon coast with northerly flow aloft over the forecast area. Positively tilted upper level ridge over Western Canada on Monday will expand southward over the coming days strengthening the near surface inversion especially across Southeast Oregon.
The next precipitation chance will arrive Tuesday with passing low pressure. High pressure will quickly depart the area by Tuesday morning. Low pressure will then lift northeastwards from the TX high plains and into the eastern Great Lakes by Tuesday night.
A low pressure system will move across Arizona tonight, resulting in dissipating clouds and winds.
(Today through Tuesday) High pressure is centered just south of the Great Lakes early this morning and a dry air mass has settled over Middle Tennessee. It looks as though surface temperatures will remain above freezing throughout the event.
On Monday with more sunshine and southeast winds, temperatures will moderate a bit with highs in the low to mid 40s. In the meantime, the deepening trough over the southwestern CONUS, will begin to lift out towards the region on Monday. Once the snow does begin to make it to the surface, surface temperatures will be at or near freezing, so will see snow accumulate on most surfaces. The majority of GEFS and WPC ensemble qpf plumes area are now clustering between a tenth and two tenths of an inch QPF across the forecast area, with the highest amounts along and north of I-70.
Warmer Expect a transition to primarily scattered cloud cover by midday. Multilobal cyclone through far southern Quebec to dominant southwest Manitoba gyre that digs south through eastern Dakotas today. Flow backs with time as Great Lakes trough broadens.
Still seeing some gusty winds in the 20 to 30 mph range in the mountains on back side of upper level trof that is moving thru NM.
Cooler than normal temperatures will continue into this week across the Inland Northwest. Monday and Tuesday: Dry and cold weather continues as upper level ridging builds over the northwest and becomes centered over the coastline by late Monday with continued northerly flow aloft over the Inland Northwest.
Currently, an upper level trough is crossing over the Four Corners region. 700 mb frontogenesis associated with the system's warm front will also pass through the southern CWA, adding more support to that area. Sounding data shows a saturated dendritic growth zone atop a dry layer and above freezing temperatures into early Monday evening. By the time the dry layer saturates, temperatures should be below freezing. The potential for rain is present primarily before 03z when temperatures may linger above freezing, but beyond 03z, snow will be the predominant precipitation type.
Amounts will range from a trace up to two inches possible with the higher amounts generally along a line from Kingman to Emporia.
The highest snow amounts with this system look to be across west-central parts of the state where several inches are possible.
A diffuse, shallow frontal boundary over the far southeast Gulf waters is hard to discern near or north of the Keys, with dewpoints holding in the lower 70s although a gentle north breeze has become established across the middle and lower Keys. High altitude pattern over Florida appeared zonal, with the mid level trough axis now east of the Florida peninsula leaving the frontal remnant behind. Aside from a few showers over the Straits today, the Keys will likely see dry, mostly sunny weather with the lower 70s dewpoints rather misleading given extensive dry air aloft and mild mid-level temperatures. 850-700 mb narrow ridging sets up overhead with light to gentle northeast to east winds and some potential for overnight decoupling each night over the interior of the larger islands.
A weak area of low pressure along the California coast will bring a low-end chance for light snow showers in the Eastern Sierra and the Lake Tahoe Basin late tonight into Tuesday.
Mainly dry weather conditions to prevail with periods of offshore winds across the higher terrain of the interior through midweek. As such, temperatures in the interior valleys have dropped into the 30s with a few of the coldest locations currently sub-freezing. Meanwhile, another mid/upper level closed low dropping southward off of the northern California coast will shift further south in the next 12 to 24 hours.
(Today) Tranquil weather right now across the Tennessee Valley, with high pressure generally promoting clear/calm conditions, save for some scattered bands of cirrus passing overhead. The only weather concern at the moment is some patchy freezing fog that is mainly occurring directly along rivers/lakes. However, motorists should use a little extra caution along roads/bridges that cross these areas. This fog will dissipate by mid-morning and another dry day is expected with the ridge directly overhead. Our surface winds will veer to the ESE/SE today, allowing for a good warm-up, with highs running up to 15-20 degrees higher than yesterday -- peaking in the low to mid 50s. Clouds will begin to increase late in the afternoon ahead of an approaching low pressure system, but not enough to impact our weather/temperatures a whole lot.
a wintry mix is expected in the higher terrain of the Ouachita and Ozarks. but expect a quick transition to a rain/snow/sleet mix in the higher terrain areas as temps cool to near freezing. NWRLY winds will keep cooler/drier air filtering into the state.
623 AM EST Mon Nov 14 2022 (Today through Tuesday) A weak cold front meanders around southern Florida emanating from an area of low pressure off New England and the Canadian maritimes.
Highs today should range from the low 30s in northeast Nebraska where the front has already pushed through to the low to mid 40s across far southeast Nebraska and southwest Iowa.
A majority of central Alabama will likely experience sub-freezing temperatures this morning. Surface temperatures will stay well above freezing tonight.
Moisture wrapping around the low moving into the col to the north of the low continued to bring some light snow showers to portions of central and southwest Colorado early this morning according to automated sensors. Meanwhile, clouds were increasing ahead of a short wave trough approaching from the north. Two additional short wave troughs push south-southeastward across the area during the period, the second tonight and the third on Tuesday. Cold air advection in the persistent north-northwest flow is expected to keep temperatures cooler than normal to begin the week.
A mostly featureless upper level low hugs the coastline as it moves over our CWA. Given the offset position of the low, offshore winds will further enhance a drier air trend through the work week.
Dry and cool conditions will persist through much of the week with an upper level ridge across the Pacific Northwest.
700 AM EST Mon Nov 14 2022 A weak overrunning pattern has setup across the region with northeast winds in the first couple of thousand feet bringing some cooler drier air into the area while above about 3000 feet we're seeing south to southwest flow. Aloft, a flat ridging builds over the Florida Peninsula with mostly zonal flow. At the surface, broad high pressure system builds in over the east coast bringing a drier airmass into the region after the passage of the cold front. On Tuesday night, we will start to gradually transition to moist airmass as another cold front pushes down into the Florida Peninsula.
536 AM CST Mon Nov 14 2022 (Today) Tranquil weather right now across the Tennessee Valley, with high pressure generally promoting clear/calm conditions, save for some scattered bands of cirrus passing overhead. The only weather concern at the moment is some patchy freezing fog that is mainly occurring directly along rivers/lakes. However, motorists should use a little extra caution along roads/bridges that cross these areas. This fog will dissipate by mid-morning and another dry day is expected with the ridge directly overhead. Our surface winds will veer to the ESE/SE today, allowing for a good warm-up, with highs running up to 15-20 degrees higher than yesterday -- peaking in the low to mid 50s. Clouds will begin to increase late in the afternoon ahead of an approaching low pressure system, but not enough to impact our weather/temperatures a whole lot.
The only exception to this is patchy freezing or ice fog during the early morning hours.
An upper low over Manitoba will continue cyclonic flow aloft over North Dakota. The upper low is going to enable overcast skies across the Northern Plains today and tomorrow.
A large ridge has developed off the west coast running from off of California, the PacNW, and British Columbia where it terminates over the Yukon.
Spotty light freezing rain is possible across far northeast Tennessee, Smoky Mountains, and parts of southwest Virginia toward daybreak. Discussion: Satellite and area observations show the low clouds finally dissipating across southwest Virginia. For today, besides some high level clouds, ridging surface and aloft will produce a much nicer day across the Tennessee valley and southern Appalachians. The low-level jet will also increase the isentropic lift across the region. Surface temperatures across far northeast Tennessee, Smoky Mountains, and possibly parts of southwest Virginia may be below freezing once precipitation begins.
Temperatures remain below freezing during the daytime, and should remain in the teens for overnight lows.
Upper level analysis shows low pressure over southern Manitoba, with another low near the Four Corners area and a large scale trough generally covering much of the central into eastern US.
Multilobal cyclone through far southern Quebec to dominant southwest Manitoba gyre that digs south through eastern Dakotas today. Flow backs with time as Great Lakes trough broadens.
Given the 1 to 2 inch snow accumulations currently forecast in the higher terrain, with isolated higher amounts possible, a winter weather advisory will be issued for aforementioned areas.
VALLEY FREEZING FOG/STRATUS AND High pressure over the coastal Pacific Northwest will result in northerly flow over the Northern Rockies through midweek. This trapped cold air will maintain patchy valley freezing fog and low stratus decks, as well as degrade air quality. Afternoon temperatures will continue to struggle to warm to freezing within valleys that already have a continuous snow cover.
Otherwise, temperatures have held in the upper teens to lower 20s overnight staying warmer than expected thanks to the cloud deck hanging around the region. Temperatures remain below freezing during the daytime, and should remain in the teens for overnight lows.
521 AM CST Mon Nov 14 2022 (Today through Tuesday) High pressure is centered just south of the Great Lakes early this morning and a dry air mass has settled over Middle Tennessee. It looks as though surface temperatures will remain above freezing throughout the event.
Flow aloft will become increasingly southwesterly through the day as a trough swings into the Southern Plains. Meanwhile, surface winds will slowly veer to the southeast by the afternoon, ahead of a cold front that will impact the TN Valley late tonight. With that said, highs are still expected to warm into the lower to mid 50s by the afternoon which is around 10 degrees below normal for mid November.
Low temperatures should remain well above freezing so frozen or freezing precipitation should not be an issue.
229 PM CST Mon Nov 14 2022 Key Messages -Unchanging pattern for much of the short term -Clearing possible Tuesday night Overcast skies and flurries can be seen across most of the FA with temperatures in the low 20s. Weak low pressure is dominating the region, with smaller areas of vorticity across parts of southern MN and eastern ND.
Temperatures are in the upper 70s to lower 80s, with dewpoints in the lower 70s.
Precipitation will start as predominately light rain early this afternoon as surface temperatures hover around the low 40s across most of the forecast area.
At the surface, temperatures will remain near to just above freezing well into the overnight across our southern half to two-thirds of the forecast area. The weakening ascent, warmer near surface temperatures, and top-down saturating may all cut into accumulations with this system overnight. This may do several things, as the tropopause lowers, low-level rates steepen so there is actually a small amount of CAPE below the DGZ with surface temperatures near freezing. The upper pattern will persist with longwave troughing over the eastern half of the US and Canada.
A band of frontogenesis north of the main low pressure system over KS and OK led to a semi-stationary band of snow this morning. This will keep high temperatures tomorrow in the low-to-mid 30s for our area with winds gusting to 20-25 mph. I wouldn't be surprised if we see a round of light flurries somewhere, but with how dry the low- levels are it will be very hard to achieve. Over the weekend, the upper-level trough shifts off to the the northeast, leaving us in less-active northwesterly flow.
A broad upper level trough will setup during the week covering the central and eastern states.
Elongating/sharpening upper trough through the wrn lakes of sig concern this period. While lake based thermal trough not as strong as was seen Sat, favorable long axis fetch combined with good synoptic moisture plume will enhance otherwise strongly forced focused single band during the day/evening Wed over nw IN initially before backing into sw MI Wed night. Elsewhere numerous snow showers expected far west early Wed, spreading east and south through Wed night before activity shifts north into lower MI as upper trough swings through. Thereafter intrusion of substantially colder air Thu night-Fri amidst residual wrn lakes center troughing will reinvigorate intense lake snow showers over sw MI within largely wsw low level flow.
A blocking ridge of high pressure remains in place across the NW states which has led to stagnating air conditions, morning fog and low clouds, unseasonably cold temperatures, and gradually deteriorating air quality.
Dry mid-level air filters in quickly behind the system, which may result in a brief loss of ice introduction later this afternoon and evening, meaning a little freezing drizzle is possible in northern Iowa. Into southern Iowa some loss of ice introduction and marginally warmer temperatures will allow for a brief rain/snow mix, though much of the area will see snow lasting much of the day.
1251 PM EST Mon Nov 14 2022 Aviation --Cold and fair weather into Tuesday-- The upper level trough that coupled with lake enhancement and brought the lakeshore their first significant snowfall of the season will continue its trek eastward. A ridge of high pressure will build over the region today and allow for downsloping through the region.
1133 AM CST Mon Nov 14 2022 (Today through Tuesday) High pressure is centered just south of the Great Lakes early this morning and a dry air mass has settled over Middle Tennessee. It looks as though surface temperatures will remain above freezing throughout the event.