Aikyam-Lab/Synoptic-Bench huggingface dataset:
256 AM EST Mon Dec 11 2023 - Clearing and Cold today - Dry weather for the upcoming work week Surface analysis early this morning shows a strong ridge of high pressure stretching north from the eastern TX and lower Mississippi River Valley to Minnesota and Wisconsin. Water vapor imagery aloft shows a broad, elongated upper trough in place stretching from the east coast to Appalachia, then west to the plains and eastern Rockies. Models keep moderate northwest flow in place aloft as the broad trough remains in place over Ontario and Quebec. The 925 MB RH fields suggest the current stratocu found across Central Indiana will also advect eastward, along with the passing ridge axis. Southerly winds ahead of the approaching dry cold front will provide some slight mixing as a pressure gradient will remain across the area.
238 AM EST Mon Dec 11 2023 It should be drier and much cooler today as high pressure builds in from the west. Temperatures fall quickly behind the departing cold front with forecast lows in the lower to mid 30s west and upper 30s and lower 40s east. Skies remain clear tonight and will combine with light winds to produce subfreezing temperatures for most of the CWA.
102 AM EST Mon Dec 11 2023 (06Z TAFS) Cold front rapidly racing across southern terminals after clearing northern ones this evening, with gusty NW winds and a period of MVFR cigs in its wake.
Expect a return of coastal stratus and patchy fog this evening into Tuesday morning along with warmer overnight coastal and bayside temperatures.
1052 PM CST Sun Dec 10 2023 (Tonight through Monday Night) Coldest night of the season unfolding for our four state area with already some readings below or at freezing in Atlanta and Magnolia. This area of high pressure will drift along the coast and cross the MS River by midday with a light return flow developing mid to late morning.
High pressure will then build in for most of the week bringing cool and dry weather once again. Cold front/wind shift line continues to progress through CWA and will be offshore within the hour. A cold front will move through the area overnight, preceded by scattered to numerous showers and a few thunderstorms. Lows tonight will fall to the low to mid 40s after the front passes with highs Monday in the low to mid 50s.
346 AM EST Mon Dec 11 2023 Low pressure will depart the New England coastline with any lingering snow or snow showers ending.
Today will see a weak cold front pass through the area late this morning into the afternoon. Strong western CONUS ridge will bring persistent warmer than normal temperatures, downslope winds and dry conditions.
That wave will push a slightly stronger cold front southward through the area tonight with high pressure moving into the region behind the front. That cold front will drop temperature back to seasonal levels for Tuesday with highs in the middle 40s expected. That high pressure will merge with another high pressure area over the Southeastern US and then occupy most of the eastern third to half of the CONUS. While this is occurring, upper-level ridging will amplify over the western half of the country with a cutoff low getting lodged within the ridge in the Southwest.
A south to southwesterly breeze will lock in tonight as the pressure gradient tightens a bit in advance of a cold front trailing south from a low over Canada. Cold front will move across the area Tuesday morning with very little fanfare, just a wind shift to the west-northwest.
Overnight lows will fall into the low 40s with mostly cloudy skies. Upper level trough will continue to influence the area today with just some showers around. A weak upper level ridge will build in on Monday into Tuesday for quieter weather conditions.
1010 PM EST Sun Dec 10 2023 Update Ongoing light lake effect precipitation may transition to predominately drizzle/freezing drizzle/snow grains overnight into Monday morning. Road temps are still in the mid 30s so there probably won't be too much impact over the next several hours should the precip become predominately freezing drizzle, but it is certainly something to watch for the Monday morning commute since sfc temps are expected drop off a few degrees by that time.
301 AM EST Mon Dec 11 2023 A strong cold front will push off the North Carolina coast this morning.
1044 PM MST Sun Dec 10 2023 - Light snow in the mountains through Monday, possibly spilling onto northern plains Monday night with a little freezing drizzle as well.
352 AM MST Mon Dec 11 2023 135 AM MST Mon Dec 11 2023 - Cold front will bring light snow to the northern Black Hills and southwestern SD today and Tuesday. A Canadian low pressure system is dragging a cold front into the northern US. As the cold front slides through the CWA today, northwesterly winds will become breezy (15-20 mph with gusts around 30 mph). Temps will warm back into the 40s and 50s for the rest of the week, as split flow develops and upper ridging dominates our weather pattern.
404 AM EST Mon Dec 11 2023 High pressure will continue to keep a dry weather pattern over the Ohio Valley for the remainder of the week.
303 AM CST Mon Dec 11 2023 - Patchy freezing drizzle this morning.
657 AM EST Mon Dec 11 2023 (Today through Tuesday) A breezy northwesterly flow has developed across the peninsula in the wake of a cold front that moved through earlier this morning. As the mid-level longwave trough shifts eastward into the Atlantic, drier and cooler air will settle into South Florida. Rain chances will approach zero and temperatures will be cooler with temperatures struggling to reach the 70s in portions of the area today.
After we start the week with quiet weather and above normal temperatures with highs in the upper 40s to lower 50s, a cold front will push into the region from the north late today into tonight. High pressure will then build down behind the front from the Dakotas into the upper Mississippi valley, allowing the boundary to move back northward as a warm front late tonight into Tuesday. Ensemble guidance has remained very consistent over the past several days in developing a split flow regime aloft with a closed low moving across the southwestern US topped by a large northern stream ridge.
/Issued 1215 AM CST Mon Dec 11 2023/ /Monday and Tuesday/ A high pressure center currently centered over East Texas will continue to move east the next couple of days. South flow has returned, but light winds and mostly clear skies will allow most outside of immediate urban areas to fall below freezing this morning. South to southwest winds today will aid in airmass modification, with today's highs peaking 5-10 degrees warmer than yesterday. An upper trough will deepen over the Western CONUS early this week. Tonight should be cool, but slightly warmer with only a few locations across northeast Texas falling to freezing Tuesday morning. Dense cirrus moving in Tuesday will limit insolation and keep highs in the low to mid 60s.
A weak cold front is slowly moving south out of Canada this morning and is expected to cross into northwest Montana a little before sunrise and then into west-central Montana by mid morning. Likely a wintry mix of rain, freezing rain and snow will occur.
647 AM EST Mon Dec 11 2023 High pressure builds in from the west through the rest of the week, bringing fair weather back to ENC. The cold front is now well offshore, with N to NW flow prevailing across the area. High pressure will ridge in from the west stronger overnight, quickly weakening the gradient and bringing light to calm winds inland after sunset. Upper level pattern trends zonal as upper trough digs into the western CONUS during the period.
(Rest of Today) Tranquil conditions across the Tennessee Valley this morning, with high pressure in control of our weather. Highs today will peak in the upper 40s in our eastern areas along the Plateau to the lower 50s elsewhere across the Tennessee Valley.
Freezing levels will be around 7000 to 8000 feet. While this will keep some showers going, we should see an overall decrease in shower coverage through the day and especially tonight as the trough settles into the Great Basin.
(Now through Tuesday) An upper level trough over the eastern CONUS will gradually translate eastward into the western Atlantic by this evening, leaving a zonal flow aloft in place over our forecast area. Another chilly night can be expected tonight with lows around 30 to the lower 30s over most locations along and north of I-10. Lows near the coast will be a little warmer in the mid 30s to lower 40s.
558 AM EST Mon Dec 11 2023 - Clearing and Cold today - Dry weather for the upcoming work week Surface analysis early this morning shows a strong ridge of high pressure stretching north from the eastern TX and lower Mississippi River Valley to Minnesota and Wisconsin. Water vapor imagery aloft shows a broad, elongated upper trough in place stretching from the east coast to Appalachia, then west to the plains and eastern Rockies. Models keep moderate northwest flow in place aloft as the broad trough remains in place over Ontario and Quebec. The 925 MB RH fields suggest the current stratocu found across Central Indiana will also advect eastward, along with the passing ridge axis. Southerly winds ahead of the approaching dry cold front will provide some slight mixing as a pressure gradient will remain across the area.
624 AM EST Mon Dec 11 2023 It should be drier and much cooler today as high pressure builds in from the west. Skies remain clear tonight and will combine with light winds to produce subfreezing temperatures for most of the CWA.
A longwave trough over the central/eastern CONUS will maintain cool/dry northwest flow aloft and a continental polar airmass at the surface. After a freezing start to the morning, sunny skies will allow temperatures to rebound well into the 50s to lower 60s this afternoon across the area.
Lake effect precip will continue to wind down this morning as midlevel trough axis exits and subsidence inversion heights steadily lower. WAA continues into Tue ahead of a cold front being driven by northern Lakes midlevel trough. Strong subsidence/high pressure then settles into the Ohio Valley for Wed setting us up for some chilly nights with ideal radiational cooling. Slow but steady moderation in temps expected through the weekend as low level ridge slowly moves east. VFR expected overnight with increasing winds by daybreak Tuesday as next (dry) cold front approaches.
A cut-off low pressure system will become established across Arizona for the middle to latter portion of the week, resulting dry and cool conditions across Utah and southwest Wyoming.
527 AM CST Mon Dec 11 2023 - Patchy freezing drizzle this morning.
(Today) Our morning is off to a chilly start as high pressure continues to filter in over the region, with northerly flow reinforcing these colder temps. Luckily it looks like dewpoint depressions are large enough that freezing fog won't be an issue for the morning commute, but it is worth mentioning that any water left on the roadways from the previous day's rain will likely turn into black ice this morning, so be careful if hitting the road early this morning.
KBYX radar shows the cold front moving southeastward through the deep Gulf waters and the nearshore waters to the west and north of the Lower Keys. The cold front is being accompanied by a few brief sprinkles along with an increase in winds. Temperatures across the Island Chain are currently in the lower 70s with dew points near 70 degrees. After the passage of the cold front early this morning, expecting a dry day with breezy conditions, especially for the Middle and Lower Keys. Therefore, kept highs in the lower 70s for today for only a rise of a degree or two expected. From Monday night on through late week, a strong anticyclone over the Southeastern United States will mostly fluctuate in strength and placement for the duration of the week.
641 AM EST Mon Dec 11 2023 High pressure will continue to keep a dry weather pattern over the Ohio Valley for the remainder of the week.
700 AM EST Mon Dec 11 2023 Scattered snow showers are expected this morning while lingering over the higher elevations into the afternoon. Limited snow growth in the boundary layer along with sfc temperatures >32F should keep anymore accumulations outside of the ridges to tenths of an inch if any. Gusty winds and any locally heavier snowfall rates locally could lead to temporary visibility reductions, but accumulations on roadways will remain limited with road temperatures above freezing, save areas in higher elevations and north of I-80. Dry conditions and a gradually clearing sky is expected overnight as ridging builds in from the west.
354 AM MST Mon Dec 11 2023 A weak cold front moves south across the region today with areas of snow affecting primarily north-central and central Montana this morning.
429 AM EST Mon Dec 11 2023 Scattered snow showers are expected this morning while lingering over the higher elevations into the afternoon. Limited snow growth in the boundary layer along with sfc temperatures >32F should keep anymore accumulations outside of the ridges to tenths of an inch if any. Dry conditions and a gradually clearing sky is expected overnight as ridging builds in from the west.
Meanwhile, an mid/upper level trough will over Central Mexico will translate toward South Texas through the day, placing the region beneath southwesterly flow. The combination of return flow and insolation should result in slightly warmer temperatures (although still slightly below normal for mid December), with highs ranging from the mid 60s across the Northern Ranchlands to around 70 degrees across the Rio Grande Valley. Overcast skies should result in warmer low temperatures tonight as cloud cover limits radiational cooling processes, with low temperatures ranging from the upper 40s to upper 50s. The mid/upper level trough will continue to translate toward the Lower Texas coast into Tuesday, which should result in the return of sunshine at least through early Tuesday afternoon before mostly cloudy skies return.
Partly to mostly cloudy skies expected through Tuesday morning as high-level moisture moves through a ridge. Midweek, a trough will push through the southwestern United States, returning northerly wind gusts to the area. Fair weather will continue as a broad swath of high clouds streams over our region today and tonight underneath a weak trough digging down from the Pacific Northwest.
550 AM CST Mon Dec 11 2023 - Highs in the 50s for most areas today before a cold front moves through the area overnight.
233 AM MST Mon Dec 11 2023 - Light snow in the mountains through this evening, possibly spilling onto northern plains tonight with a little freezing drizzle as well (mainly north of Denver).
A mix of slushy snow and light freezing rain will make slick conditions through the morning commute. A Canadian cold front will begin to cross the Continental Divide this morning, making it to KGPI around 11/15z and to KMSO around 11/19z. Precipitation type will be a wintry mix of slushy snow and light freezing rain as snow levels hover at or just above the valleys of western Montana. A weak cold front is slowly moving south out of Canada this morning and is expected to cross into northwest Montana a little before sunrise and then into west-central Montana by mid morning. Likely a wintry mix of rain, freezing rain and snow will occur.
311 AM CST Mon Dec 11 2023 - After some cooler temperatures on Tuesday, high temperatures will run between 5 and 15 degrees above normal this week (normal highs are in upper 20s and lower 30s).
527 AM CST Mon Dec 11 2023 (Today through Tuesday) Quiet weather for the next 2 days as high pressure builds in. The coldest areas will be cooler microclimates in the northeast.
937 AM EST Mon Dec 11 2023 It should be drier and much cooler today as high pressure builds in from the west. Skies remain clear tonight and will combine with light winds to produce subfreezing temperatures for most of the CWA.
(Today through Tuesday Night) High pressure will begin a slow movement east during the day today, with surface to 850mb winds becoming southerly to southwesterly in nature. Tonight's low temperatures will be a bit warmer than last nights with lows dropping into the upper 30s to 40s inland and into the 50s along the coast. Highs will be in the 60s with some locations in the southern counties and along the coast reaching into the low 70s. Increased cloud cover further south will limit radiational cooling and keep lows slightly warmer with temperatures in the 50s.
509 AM MST Mon Dec 11 2023 - Light snow in the mountains through this evening, possibly spilling onto northern plains tonight with a little freezing drizzle as well (mainly north of Denver).
- Winds increase this morning, with the peak during the passage of the cold front this afternoon and evening. - Ridge builds eastward mid week, with a transition to NW flow by the weekend. There is a chance (30%) the winds have little affect on the fog this morning and we could see it continue into the early afternoon before the cold front approaches. A short wave moves along the NW flow aloft bringing a trailing cold front to ND and MN.
903 AM EST Mon Dec 11 2023 High pressure will continue to keep a dry weather pattern over the Ohio Valley for the remainder of the week.
128 AM PST Mon Dec 11 2023 High pressure will continue to produce dry weather conditions, valley inversions, and near average temperatures this week.
940 AM EST Mon Dec 11 2023 High pressure builds in from the west through the rest of the week, bringing fair weather back to ENC. The cold front is now well offshore, with N to NW flow prevailing across the area. High pressure will ridge in from the west stronger overnight, quickly weakening the gradient and bringing light to calm winds inland after sunset. Upper level pattern trends zonal as upper trough digs into the western CONUS during the period.
517 AM CST Mon Dec 11 2023 (Today and tonight) Veered low level flow will aid in bringing some warmer air eastward into the area from the higher terrain to our west. This will begin to bring higher dewpoints back northward into the area and along with abundant high clouds will keep temperatures a bit warmer than the last couple of days.
418 AM EST Mon Dec 11 2023 Scattered snow showers are expected this morning while lingering over the higher elevations into the afternoon. Limited snow growth in the boundary layer along with sfc temperatures >32F should keep anymore accumulations outside of the ridges to tenths of an inch if any. Dry conditions and a gradually clearing sky is expected overnight as ridging builds in from the west.
532 AM CST Mon Dec 11 2023 (Today through Tuesday Night) High pressure will begin a slow movement east during the day today, with surface to 850mb winds becoming southerly to southwesterly in nature. Tonight's low temperatures will be a bit warmer than last nights with lows dropping into the upper 30s to 40s inland and into the 50s along the coast. Highs will be in the 60s with some locations in the southern counties and along the coast reaching into the low 70s. Increased cloud cover further south will limit radiational cooling and keep lows slightly warmer with temperatures in the 50s.
524 AM CST Mon Dec 11 2023 (Today through Tuesday afternoon) It is going to be another chilly morning across the region to start the week as temperatures will fall to near freezing across the bulk of that area. As troughing continues to translate east across the Great Lakes this afternoon with another trough moving into the Pacific Northwest, mid-level ridging and increasing heights are expected across the southern Great Plains.
While this will keep some showers going, we should see an overall decrease in shower coverage through the day and especially tonight as the trough settles into the Great Basin.
This cooler air will be short lived as a weak ridging pattern sets up, allowing for high temperatures to once again reach the mid 40s to low 50s through the rest of the week.
Area web cams indicate very light snow could be falling as far north as the Island Park region, though some fog and pockets of freezing drizzle/mist may be occurring as well. Additional concerns are nose of warm air aloft riding in, mainly north, allowing for pockets of freezing rain or freezing drizzle through the day. There is a slightly better chance for fog overnight tonight, but overall would think any clearing potential on Tuesday would lead to even better fog chances Tuesday night as low sages south toward Las Vegas and upper ridge begins to tilt over through the PacNW into East Idaho.
(Today through Tuesday) A breezy northwesterly flow has developed across the peninsula in the wake of a cold front that moved through earlier this morning. As the mid-level longwave trough shifts eastward into the Atlantic, drier and cooler air will settle into South Florida. Rain chances will approach zero and temperatures will be cooler with temperatures struggling to reach the 70s in portions of the area today.
237 AM PST Mon Dec 11 2023 High pressure over the West will break down today as a weak trough of low pressure dives into the region.
549 AM CST Mon Dec 11 2023 (Today) Our morning is off to a chilly start as high pressure continues to filter in over the region, with northerly flow reinforcing these colder temps. Luckily it looks like dewpoint depressions are large enough that freezing fog won't be an issue for the morning commute, but it is worth mentioning that any water left on the roadways from the previous day's rain will likely turn into black ice this morning, so be careful if hitting the road early this morning.
305 AM CST Mon Dec 11 2023 - Highs in the 50s for most areas today before a cold front moves through the area overnight.
527 AM CST Mon Dec 11 2023 - After some cooler temperatures on Tuesday, high temperatures will run between 5 and 15 degrees above normal this week (normal highs are in upper 20s and lower 30s).
112 PM EST Mon Dec 11 2023 Building high pressure brings drier conditions late today into tonight. A dry cold front crosses Tuesday night, followed by high pressure for the balance of the week. Cloud cover will slowly erode from southwest to northeast late today into tonight, then quiet and mostly sunny conditions are expected for Tuesday as high pressure remains in control. Daytime highs on Tuesday are expected to reach mid 40s to low 50s in the lowlands and 30s to mid 40s along the mountains.
206 PM EST Mon Dec 11 2023 Dry weather is expected across the Ohio Valley through the end of the work week thanks to multiple areas of high pressure moving across the region.
/Tonight through Monday/ Key Messages: - Cooler Tuesday with a return to above normal temperatures through this weekend.
Even under full sunshine, temperatures are only rising into the low to mid 50s with a few 40s still left across the far northeast counties. Guidance typically has a hard time realizing how cold temperatures can drop in our normally cooler spots such as Gadsden, Jasper, and northeastern valley locations. We could be looking at a favorable setup for fog development due to the warmer water conditions and ideal radiational cooling. I've gone ahead and placed patchy and areas of freezing fog in the forecast for locations adjacent to these river basins and lakes.
(Rest of today through Tuesday) Breezy northerly flow has developed across the peninsula in the wake of a cold front that moved through earlier this morning. Drier and cooler air will settle over South Florida as the mid-level trough responsible for the cold front shifts over the Atlantic. Rain chances will be near zero with the dry air in place, and temperatures will be cooler, with highs struggling to reach the 70s in some areas.
1138 AM CST Mon Dec 11 2023 (Today through Tuesday afternoon) It is going to be another chilly morning across the region to start the week as temperatures will fall to near freezing across the bulk of that area. As troughing continues to translate east across the Great Lakes this afternoon with another trough moving into the Pacific Northwest, mid-level ridging and increasing heights are expected across the southern Great Plains.
136 PM EST Mon Dec 11 2023 Dry and seasonal conditions continue through the rest of the week with high pressure overhead.