Aikyam-Lab/Synoptic-Bench huggingface dataset:
527 AM CST Mon Feb 8 2021 Periodic chances of light snow will continue this week, though a break is expected on Tuesday as high pressure drifts through the area. Temperatures will continue to be way below normal in most areas, though areas south of I-70 may get close to freezing. With this trough just north of the Ohio River by late afternoon, focus will shift more to areas south of I-70 into the first part of the evening.
427 AM MST Mon Feb 8 2021 Broad troughing persists over the CONUS, with the upper low spinning over Manitoba/Ontario.
203 AM MST Mon Feb 8 2021 Broad troughing persists over the CONUS, with the upper low spinning over Manitoba/Ontario.
530 AM EST Mon Feb 8 2021 High pressure builds across the Mid Atlantic today then off the northeast coast tonight. High pressure will move from the mid-Atlantic this morning to off the Northeast coast tonight, while upper flow stays west-southwest. Temp profiles across areas north of Bedford-Lynchburg-Farmville may allow for freezing rain/freezing drizzle but again pops are 20 percent so not anticipating much.
Otherwise expect continued warmth with highs in the lower 70s/80s despite existing cloud cover. /issued 228 AM EST Mon Feb 8 2021/ A cold front resides across southwest Florida with a pleasant cool breeze through the remainder of the night.
Today through Tuesday night: Upper level ridge off the coast coupled with a broad trof over much of Canada continues to keep a Northwest flow over Eastern Washington and North Idaho. Locations not affected by the snowbands will remain dry with generally clear skies overhead and cooling trend in temperatures as the low level flow favors cooler air filtering down from the north/northwest.
933 AM EST Mon Feb 8 2021 High pressure builds over the region today and moves offshore tonight.
Temperatures and dew points are in the low 70s across the island communities. A dense fog advisory is also in effect for the coastal waters surrounding the Lower and Middle Keys. The weak front previously mentioned is expected to lift northward as a warm front today as a high pressure system moves into the northwest Atlantic.
442 AM EST Mon Feb 8 2021 High pressure will build across Pennsylvania today, then an Alberta Clipper will track through the state late tonight into Tuesday.
608 AM EST Mon Feb 8 2021 High pressure will bring the only day of sunshine all week on Monday. Unsettled weather will return late Tuesday through the weekend as another front stalls near the Carolinas and multiple low pressure systems move across. Dry weather is expected today as a bubble of high pressure moves eastward across the Mid Atlantic states. As the high moves offshore this afternoon, veering low level flow will begin to bring Atlantic moisture back across the area. Highs Tuesday should range from the lower 60s inland to some upper 60s near the coast (but away from the cooler beaches).
Duration of the low clouds is in question initially, but there should be an expansion of the high MVFR cigs this afternoon, with light snow developing from south to north early this evening as weak moisture advection takes place. As the snow ends tonight, winds shifting to the northwest toward 12z Tuesday will likely usher in enough dry air to scatter out the low clouds for Tuesday morning.
457 AM EST Mon Feb 8 2021 High pressure will build across Pennsylvania today, then an Alberta Clipper will track through the state late tonight into Tuesday.
851 AM CST Mon Feb 8 2021 Low CIGS and visbys were making their way into the KPVW and KLBB terminals early this morning behind a slow moving cold front. Winds are expected to shift around to the west at KLBB and KPVW this afternoon as the cold front retreats back east.
It will be a bit warmer across the Southwest, with the deepest valleys managing to reach to near 30 degrees. Snow showers have largely ended across the CWA this morning as high pressure continues to build in from the north. It is a bit warmer across the Southwest, where temperatures are just a few degrees on either side of zero.
/Issued 425 AM EST Mon Feb 8 2021/ Today and into tomorrow we'll be on the backside of a high pressure system and easterly winds will gradually become more SE as the afternoon goes on. This will increase the available low level moisture as well as bring in some warmer air with Temps in the upper 50s to mid 60s across the area.
429 AM CST Mon Feb 8 2021 Broad cyclonic flow remains throughout the CONUS with the closed upper low sitting just south of the Hudson Bay. The 00Z TOP sounding shows saturation from about 800mb to the surface with the lowest layers within the DGZ. This setup has provided just enough isentropic lift with enough moisture to produce intermittent light snow in some places, while east central KS has at times had freezing drizzle despite the low levels being in the DGZ - probably with temps more favorable for supercooled liquid.
Precipitation and a low cloud deck will obscure terrain, primarily over the Bitterroot, Sapphire, Mission, and Clearwater Ranges, as well as the high peaks near Glacier Park.
With cold air in place through a large portion of the lower atmosphere and snow growth favorable, we expect snow accumulations to outperform due to good snow:water ratios. Higher amounts will be possible over the high terrain of Sullivan County and Northern Wayne. The highest storm totals will be east of I-81.
/Issued 642 AM EST Mon Feb 8 2021/ Today and into tomorrow we'll be on the backside of a high pressure system and easterly winds will gradually become more SE as the afternoon goes on. This will increase the available low level moisture as well as bring in some warmer air with Temps in the upper 50s to mid 60s across the area.
That along with the weak warm air advection aloft would suggest that temperatures tonight may be slightly warmer than last night.
Arctic high pressure remains over the northern CONUS throughout the forecast period.
Increasing chance of rain developing by mid to late week as a series of low pressure systems move northeast along the stalled frontal boundary.
Sluggish return flow trying to get started ahead of inverted trough to our northwest. Low clouds are expected to spread across the area late tonight in return flow aloft--little bits of QPF are shown in some model output late tonight in the deeper moisture, but this low level moisture is not connected to anything aloft to get any ice crystal growth, etc. Guidance temps look good with notably milder night tonight, and warmer Tuesday.
leaning heavily on the high side of both QPF and snow ratios still yields only about 2" and just can't justify an advisory for such low amounts. Confidence remains on the low side at this point given such a brief, tenuous signal so will hold with around 4" storm total in Berrien and just an advisory for now.
Chattanooga Airport, TN 41 62 44 63 49 / 10 0 10 20 60 Knoxville McGhee Tyson Airport, TN 38 55 40 59 46 / 10 10 10 20 60 Oak Ridge, TN 38 56 39 58 44 / 10 10 10 20 60 Tri Cities Airport, TN 33 51 37 55 42 / 10 10 10 30 50.
103 PM EST Mon Feb 8 2021 Aviation - Snow showers later today and tonight - Very cold through the upcoming week - Synoptic snow possible again late in the week -- Snow showers later today and tonight -- The next low pressure system to move east along a baroclinic zone across the Ohio Valley region will bring light synoptic snow from mid to late this afternoon through tonight. This low level convergence will be most focused from Muskegon county southward to Van Buren county.
251 PM EST Mon Feb 8 2021 Unsettled weather will return late Tuesday through the weekend as another front stalls near the Carolinas and multiple low pressure systems move across. High pressure to the northeast will give way to warm advection by early Tuesday.
Expect highs on Tuesday to be even warmer than today and peak in the low to mid 60s.
Freezing drizzle will continue through the afternoon across central portions of Oklahoma so extended the advisory through 00Z. Also expanded it a little farther south as area radars show increasing freezing drizzle development down toward Lawton and eastward as moisture lifts over shallow front. Some frontogenesis along this trough axis is expected today, and the resulting isentropic lift to the north of the boundary will result in light rain and drizzle through early afternoon, and longer in the east. With temperatures at ground level below freezing, this means freezing rain/drizzle over roughly the northwest 1/2 of Oklahoma.
Broad longwave trough pattern persists through CONUS with a -20 C to -30 C 850mb air mass over the Northern Plains. Very cold temperatures and wind chills continue tonight, though temperatures may be slightly warmer than the previous night due to modest mixing from westerly surface winds across the north.
1017 AM MST Mon Feb 8 2021 Broad troughing persists over the CONUS, with the upper low spinning over Manitoba/Ontario.
1052 AM EST Mon Feb 8 2021 The dense fog advisory for the Lower Keys has been cancelled. Dewpoint temperatures remain in the low to mid 70s, so expect a muggy day. Marine observations showing southeast to south winds at 5 to 10 knots along the eastern portions of the coastal waters near the Middle and Upper Keys, while winds near the Lower Keys are still reporting mainly east winds. Winds should become east to southeast across all of the Keys and their coastal waters as a high pressure moves into the Mid-Atlantic this afternoon. A dense fog advisory is in effect for the coastal waters to the north and west of the Lower Keys, including Bayside and Gulf waters, the far wester Florida Straits, and western Hawk Channel.
301 PM EST Mon Feb 8 2021 Zonal WSW flow aloft over the region this afternoon while at the surface a frontal boundary remains over the southern peninsula south of high pressure along the east coast. High gradually retreats into the Atlantic Tuesday allowing the boundary to slowly lifts north across the peninsula as a warm front, although from there it remains mostly draped somewhere in our vicinity over the SE CONUS.
/issued 942 AM CST Mon Feb 8 2021/ The fog in the Tupelo vicinity has lifted and conditions will gradually improve as a warm front lifts across the portions of the Mid-South today. As temperatures fall to near freezing in northeast AR and southeast MO, a brief period of light freezing rain is possible. More sunshine the further southeast into MS you go as a warm front lifts north into the area. The warm front will stall across the area becoming a stationary front.
942 AM CST Mon Feb 8 2021 The fog in the Tupelo vicinity has lifted and conditions will gradually improve as a warm front lifts across the portions of the Mid-South today. As temperatures fall to near freezing in northeast AR and southeast MO, a brief period of light freezing rain is possible. More sunshine the further southeast into MS you go as a warm front lifts north into the area. The warm front will stall across the area becoming a stationary front.
Should be enough WAA and moisture in the low levels to squeeze out a few showers with the system across the area, with better chances further to the south across central GA. Still a fair amount of divergence amongst the models with respect to the smaller-scale features providing some uncertainty about the timing and path of the higher precipitation amounts.
Tonight, high pressure centered over the eastern Dakotas and western Minnesota gradually drops southeast towards Wisconsin.
Warm front across Okeechobee County/Treasure Coast region will continue to lift slowly northward through late day and into tonight, shifting north of central Florida before daybreak Tuesday. Environment in the wake of the warm front across the area will be very conducive for fog development into tonight. Warm front will stall just north of the area, with a few showers possible across areas north of Orlando through the day. It will be warmer, with highs in the low 80s over much of the region. A warm front will be to the north of east central FL on Tue night with a developing warm sector persisting into Wed. Near zero rain chances are expected during the night with lows reaching the lower 60s.
Can't rule out freezing drizzle as well. The thinner cloud may allow for slightly warmer temps.
/Issued 1020 AM CST Mon Feb 8 2021/ Areas of freezing drizzle remain ongoing across much of NE OK and parts of NW AR this morning, and has resulted in many slick roads, particularly elevated and untreated surfaces. Freezing drizzle will continue into the afternoon across much of the same areas as the shallow frontal boundary will be slow to move much during the day. Locations above freezing south of the boundary are at or near saturated so expect little diurnal rise in those areas as well.
1050 AM EST Mon Feb 8 2021 High pressure will build across Pennsylvania today, then an Alberta Clipper will track through the state late tonight into Tuesday.
Latest guidance suggests that temperatures will still slightly warmer than last night due to an abundant stratus deck over north central Nebraska. This should keep air temperatures in the negative single digits tonight with a few isolated locations dropping into the low negative teens (as compared to last night where most locations saw between 15 and 22 below zero).
1053 AM MST Mon Feb 8 2021 The closed low rotating around the Canadian Prairie and high pressure off the Pacific NW will maintain a tight pressure gradient overhead through the short term.
Chattanooga Airport, TN 56 41 62 44 63 / 0 10 10 10 20 Knoxville McGhee Tyson Airport, TN 52 38 55 40 59 / 0 10 10 10 20 Oak Ridge, TN 52 38 56 39 58 / 0 10 10 10 20 Tri Cities Airport, TN 49 33 51 37 55 / 0 10 10 10 30.
316 PM EST Mon Feb 8 2021 High pressure over the region this afternoon will give way to a weak wave of low pressure passing south of the region tonight that will bring a light snow event to the North Country on Tuesday.
Light snow and freezing drizzle will remain the primary concerns for much of central and western Missouri and eastern Kansas well into the evening. Additional snowfall of a few tenths of an inch and a light glaze of ice from freezing drizzle will persist through 9 to 10 PM tonight.
1039 AM CST Mon Feb 8 2021 Periodic chances of light snow will continue this week, though a break is expected on Tuesday as high pressure drifts through the area. Temperatures will continue to be way below normal in most areas, though areas south of I-70 may get close to freezing. Monitoring our far southeastern counties for the potential of light freezing drizzle around midnight this evening. However, ascent will be very weak, reducing confidence in the likelihood of any freezing drizzle occuring. With this trough just north of the Ohio River by late afternoon, focus will shift more to areas south of I-70 into the first part of the evening.
1009 AM PST Mon Feb 8 2021 A fair and cooler day is in store for SoCal today. For the end of the week and the weekend, a series of troughs will move through, bringing chances for precipitation to SoCal.
1020 AM CST Mon Feb 8 2021 Areas of freezing drizzle remain ongoing across much of NE OK and parts of NW AR this morning, and has resulted in many slick roads, particularly elevated and untreated surfaces. Freezing drizzle will continue into the afternoon across much of the same areas as the shallow frontal boundary will be slow to move much during the day. Locations above freezing south of the boundary are at or near saturated so expect little diurnal rise in those areas as well.
(This evening through Tuesday) A cold front has moved just south of Interstate 20 this afternoon. Areas of freezing fog and light freezing drizzle may develop across mainly the northern Big Country Tuesday morning. Highs on Tuesday will dependent on the eventual position of the aforementioned cold front.
111 PM EST Mon Feb 8 2021 High pressure will build across Pennsylvania today, then an Alberta Clipper will track through the state late tonight into Tuesday.
1215 PM EST Mon Feb 8 2021 High pressure will bring the only day of sunshine all week on Monday. Unsettled weather will return late Tuesday through the weekend as another front stalls near the Carolinas and multiple low pressure systems move across. Dry weather is expected today as a bubble of high pressure moves eastward across the Mid Atlantic states. As the high moves offshore this afternoon, veering low level flow will begin to bring Atlantic moisture back across the area. Highs Tuesday should range from the lower 60s inland to some upper 60s near the coast (but away from the cooler beaches).
931 AM CST Mon Feb 8 2021 A cold front is located just north of the Interstate 20 corridor and is slowly moving south. Also updated winds to reflect the slowly southward moving cold front. However, a cold front will move south to near the I-20 corridor by late this afternoon. Temperatures will be cooler across the Big Country with 50s and 60s. For tonight, the cold front will move a little further south.
1125 AM EST Mon Feb 8 2021 High pressure builds across the Mid Atlantic today then off the northeast coast tonight. High pressure will move from the mid-Atlantic this morning to off the Northeast coast tonight, while upper flow stays west-southwest. Temp profiles across areas north of Bedford-Lynchburg-Farmville may allow for freezing rain/freezing drizzle but again pops are 20 percent so not anticipating much.
1203 PM CST Mon Feb 8 2021 Periodic chances of light snow will continue this week, though a break is expected on Tuesday as high pressure drifts through the area. Temperatures will continue to be way below normal in most areas, though areas south of I-70 may get close to freezing. Monitoring our far southeastern counties for the potential of light freezing drizzle around midnight this evening. However, ascent will be very weak, reducing confidence in the likelihood of any freezing drizzle occuring. With this trough just north of the Ohio River by late afternoon, focus will shift more to areas south of I-70 into the first part of the evening.
Given some uncertainty in wind speed/temperatures and most areas slightly warmer than criteria, will hold off on a headline for now. The very cold near surface temperatures make snow more likely, but would concede freezing drizzle is possible.
1001 AM EST Mon Feb 8 2021 High pressure will bring the only day of sunshine all week on Monday. Unsettled weather will return late Tuesday through the weekend as another front stalls near the Carolinas and multiple low pressure systems move across. Dry weather is expected today as a bubble of high pressure moves eastward across the Mid Atlantic states. As the high moves offshore this afternoon, veering low level flow will begin to bring Atlantic moisture back across the area. Highs Tuesday should range from the lower 60s inland to some upper 60s near the coast (but away from the cooler beaches).
Expect these clouds will dissipate after sunset as high pressure remains firmly in place over the region. The high will remain firmly in place Tuesday and Tuesday night, keeping the cold temperatures in place.
327 PM CST Mon Feb 8 2021 The southern extremity of arctic high pressure was located across the southern plains from Amarillo to southern Oklahoma. However, in extreme western Kansas, dense freezing fog may develop for a few hours as dewpoints on the high plains will be higher, along with stronger upslope lift. Tuesday will be similar to today, with highs in the teens and 20s as the low levels remain in easterly upslope flow.
328 PM CST Mon Feb 8 2021 Another day with widespread freezing drizzle and a cold front pinned along the I-44 corridor. North of the front, temperatures are in the teens with freezing drizzle causing road impacts. Road conditions have improved south of the front where temperatures are in the low 30s with peak solar insolation. As freezing drizzle continues through the evening, expect road conditions to deteriorate as the sun sets. Overall, freezing drizzle will taper off over the west late this evening and will diminish, while not stopping completely, over the rest of the area later tonight. Tuesday may see some linger very light freezing drizzle over the SE in the morning, but should be more of a break.
940 PM EST Mon Feb 8 2021 Increasing clouds with patchy light rain or drizzle will precede a warm front Tuesday, with a big warm up Tuesday afternoon well above normal.
Skies are expected to clear tonight as high pressure encroaches, though winds may stay up in 5-9 mph range in much of the advisory area.
The large scale pattern this afternoon as seen from satellite imagery was showing a strong cyclonic circulation centered over northern Manitoba with a rather broad trough stretching across the CONUS.
355 PM CST Mon Feb 8 2021 Mid-afternoon sfc analysis shows a warm front snaking across the forecast area with serly winds now in place across much of the wrn/srn locations. Water vapor imagery shows longwave troffing still in place over the center of the country with a series of disturbances noted dropping through it. wswrly flow ahead of the trof continues to pump increasing moisture aloft across the wrn Gulf Region. Despite the increasing moisture, regional 88Ds have remained quiet thanks to warmer air aloft helping cap the atmosphere. Fog guidance is beginning to key in on good fog potential behind the warm front, primarily for sern TX/w-cntl LA. Lows tomorrow night will be warmer still, with readings primarily in the upper 50s/lower 60s.
538 PM CST Mon Feb 8 2021 (This evening through Tuesday) A cold front has moved just south of Interstate 20 this afternoon. Areas of freezing fog and light freezing drizzle may develop across mainly the northern Big Country Tuesday morning. Highs on Tuesday will dependent on the eventual position of the aforementioned cold front.
(Tonight through Tuesday) Cold front continues to sag south, with low clouds following across the northern Big Country.
Concern exists with colder surface (boundary layer) temperatures dropping to the freezing mark across the north which appears to lead to a window (~09-15Z) of some scattered showers producing mixed precipitation across our north, generally either side and north of the I-64 corridor, with some light freezing rain even possible in some locations. Higher resolution models and CAMs suggest a significant warm layer with melting and temperatures at the surface at or just below freezing. However, can not rule out some spotty, minor glazing on sheltered walkways or roads, exposed objects, or even some area bridges and overpasses.
Tuesday should be dry as high pressure shifts through the area. As yet another impulse translates through the long wave trough, a few areas of light snow are ongoing across the CWA this afternoon, one near and north of the I-74 corridor and another south of I-70. Included a mention of freezing drizzle as precip winds down, but any freezing drizzle should amount to a glaze or less. With the baroclinic zone still draped across the area, the broad spread in temps will continue, with highs on Tuesday ranging from the low teens to upper 20s.
754 PM EST Mon Feb 8 2021 Increasing chance of rain developing by mid to late week as a series of low pressure systems move northeast along the stalled frontal boundary.
506 PM MST Mon Feb 8 2021 Allowed some of the lower elevation warnings to expire at 5PM this afternoon. Snow will develop and increase in coverage and intensity over the higher elevations of Carbon and Albany counties overnight tonight into Tuesday morning, and persist through Tuesday night.
Through late week, an upper low will be parked over northern Saskatchewan and northern Manitoba, just south of Hudson Bay.
The warm front will stall across north Florida on Tue, with a few showers possible across areas generally north of Orlando through the day. It will be warmer, with highs in the L80s over much of the region. A warm frontal boundary over the Treasure Coast will gradually pick up momentum as it advances northward overnight. A warm frontal boundary will lift northward across the local waters overnight.
This will bring an increase in gusty westerly winds through and below the Kern County mountain passes, as well as a slight chance of showers in the higher elevations of the Sierra north of Fresno County.