Aikyam-Lab/Synoptic-Bench huggingface dataset:
239 PM MST Thu Feb 4 2021 Upper level analysis has deep closed low over northern Minnesota with broad northwest upper flow across much of the western CONUS. At the surface, weak lee trof is in place across western SD, between high pressure to the west and to the east. Breezy northwesterly winds are making the mid 20s to mid 30s temperatures feel quite a bit cooler.
/issued 213 PM CST Thu Feb 4 2021/ A cold front is currently working its way through the region this afternoon with gusty winds and cooler temperatures behind it. This front will continue to move west until it hangs up along the higher terrain overnight.
/issued 352 PM CST Thu Feb 4 2021/ Latest surface analysis places an 994mb low pressure system over north central Illinois, with a cold front extending southwest through Saint Louis and back through Little Rock, Arkansas. Expect up to a half of inch of QPF, with the highest totals mainly over northeast Mississippi.
A surface cold front extending from northwest Louisiana to northeast Texas will move through the terminals between 15/02Z and 15/06Z. A cold front currently stretches from the San Antonio area into Shreveport then northward into the Great Lakes.
Light showers ahead of an approaching cold front currently occurring across the west, and this trend will continue late today and into tonight. This cold front is a fast mover and will buzz through here this evening, bringing numerous showers area- wide.
322 PM CST Thu Feb 4 2021 As of 21Z the midlevel trough responsible for the cold frontal passage this morning has shifted east of the MO Valley, leaving behind sunny skies. Temperatures are notable cooler than yesterday with readings currently in the 30s area-wide. Transitioning into Friday, a nice rebound in the temperature department is expected with surface ridging progressing eastward allowing westerly low level flow to return to the area.
350 PM MST Thu Feb 4 2021 There are just a few weak snow showers over the high mountains at this time. This event will be ferocious in the higher backcountry with stronger winds and up to 2 feet of snow in the most favored spots. We went ahead and issued a Winter Weather Advisory for the rest of the high mountains. The airmass is a bit warmer, but we should also have quite a bit of cloud cover so temps will be about the same. Increasing winds will cause areas of blowing snow in the high country, which will make travel difficult. Overnight lows should be around 20 F on the plains and in the low teens in the mountains.
239 PM MST Thu Feb 4 2021 Satellite imagery showing few to scattered mid level clouds across the higher elevations (favoring the northern mountains and areas just upstream) this hour.
This activity will stop a widespread warmup and keep a slight chance of light rain along the higher terrain north of the Umpqua divide.
The first round of cold air was making its way into the region this afternoon behind a fast moving cold front.
A passing weather system brought slightly cooler weather with breezy conditions to the area today. A weather system passing north of the area brought some cooler air and gusty winds with it. Wind speeds will diminish tonight but the cooler air will linger into Friday. Expect breezy afternoon winds 10 to 15 mph through this evening, with the highest speeds mainly east of Tucson. Temperatures will remain cooler Friday with above normal temperatures returning this weekend.
At this hour, a cold front is sweeping rain through the eastern half of the Mid State.
The combination of offshore high pressure and a thermal trough along the coast will result in continued moderate north winds for areas south of Cape Blanco.
1143 PM CST Thu Feb 4 2021 Will have to stick some flurries/snow showers into the forecast this evening with a quickly moving trough. Well-defined wind shift at the surface with a bit of a breeze directly behind the trough.
Upper level northwesterly flow will be in place over southwest Kansas throughout the short term period, as our area sits under the western half of a longwave trough affecting the majority of the CONUS. At the surface, weak high pressure centered over OK Friday morning will slide southeast with time, which will allow winds to stay light out of the west with partly cloudy skies. Afternoon highs will be slightly warmer that yesterday, as weak downsloping winds and daytime heating allow temperatures to rise into the upper 40s in the northern zones to the mid 50s near the KS/OK border.
Also, colder air in the lowest levels was noted this evening in the latest high-res soundings, so some mixing of sleet is possible in the eastern half of the area with freezing rain also possible in the highest elevations. BW Chattanooga Airport, TN 33 49 30 52 33 / 90 10 0 10 20 Knoxville McGhee Tyson Airport, TN 31 44 29 48 31 / 90 10 0 0 20 Oak Ridge, TN 30 45 29 48 30 / 90 10 0 0 20 Tri Cities Airport, TN 30 41 26 45 29 / 80 10 0 0 20 TN.
Snow has mostly tapered off as the main trough axis crosses the area this morning, bringing in a much colder and drier arctic air mass. These strong winds have been mixing down behind the cold front, and will combine with a strong surface pressure gradient, resulting in west-southwest surface winds around 20-25 mph with gusts 30-40 mph. However, as colder air moves in and the temp difference between the lower atmosphere and the water increases, do expect snow showers to once again develop.
Wind gusts of 25 to 30 mph are possible today, with gusts up to 40 in the higher elevations.
Also, colder air in the lowest levels was noted this evening in the latest high-res soundings, so some mixing of sleet is possible in the eastern half of the area with freezing rain also possible in the highest elevations. Chattanooga Airport, TN 49 30 52 33 53 / 0 0 10 20 0 Knoxville McGhee Tyson Airport, TN 44 29 48 31 48 / 0 0 0 20 0 Oak Ridge, TN 45 29 48 30 49 / 0 0 0 20 0 Tri Cities Airport, TN 41 26 45 29 45 / 10 10 0 20 10 TN.
311 AM EST Fri Feb 5 2021 A cold front will be approaching the region early this morning, then will move through the area today. Weak upper troughiness over the E CONUS. A broad upper trough crossing the conus keep a southwest to west flow aloft over the region.
Surface cold front has just passed the KLCH terminal and will pass through the KLFT/KARA terminals between 05/06Z and 05/07Z. The cold front will stall over the northern Gulf on Friday, with southwest winds with the southern stream continuing in the mid and upper levels.
The strong cold front has pushed through the CWA and much colder air continues to pour into the region. As the low over northern Lake Michigan moves north toward Superior, the pressure gradient, and thus the wind, will begin to decrease to the 30-35 mph range by mid morning.
1233 AM EST Fri Feb 5 2021 High pressure remains in control, leading to prevailing VFR conditions.
125 AM EST Fri Feb 5 2021 A cold front will be approaching the region early this morning, then will move through the area today. Weak upper troughiness over the E CONUS.
1251 AM EST Fri Feb 5 2021 A cold front will move through overnight. Cold front bisecting the region will continue through the remainder of the forecast area before daybreak. There will be a gradient in temperature Friday night with lows ranging from the single digits across the north to the lower 20s across the south.
The pops in GFE grids and the highlights seem to be on track. There are just a few weak snow showers over the high mountains at this time. This event will be ferocious in the higher backcountry with stronger winds and up to 2 feet of snow in the most favored spots. We went ahead and issued a Winter Weather Advisory for the rest of the high mountains. The airmass is a bit warmer, but we should also have quite a bit of cloud cover so temps will be about the same. Increasing winds will cause areas of blowing snow in the high country, which will make travel difficult. Overnight lows should be around 20 F on the plains and in the low teens in the mountains.
A few ~20 knot wind gusts remain possible at the I-35 sites tonight into Friday morning, but the highest gusts should now be behind us. A Pacific cold front is near the I-35 corridor, with warm and dry conditions behind it. Cooler conditions and breezy northerly winds are forecast behind the front this evening. Much cooler tomorrow, especially across the eastern half of the CWA, where clouds are slower to clear in the afternoon and temperatures are forecast to remain in the mid 50s to low 60s.
1045 PM MST Thu Feb 4 2021 Northwest flow in place across the area today in the wake of last night's short wave trough. After a brief break this morning, Leadville web cam shows snow showers redeveloping over the central mountains this afternoon, along with some areas of blowing snow over the higher peaks along the Continental Divide. This low is then anticipated to meander back and forth for a good portion of the upcoming week. The meandering nature of this low brings large uncertainty in the temperatures each day, mainly east of the mountains. However, only light accumulations are expected, with the highest amounts being in the 2 to 3 inch range, mainly north of Cottonwood Pass.
1008 PM MST Thu Feb 4 2021 Upper level analysis has deep closed low over northern Minnesota with broad northwest upper flow across much of the western CONUS. At the surface, weak lee trof is in place across western SD, between high pressure to the west and to the east. Breezy northwesterly winds are making the mid 20s to mid 30s temperatures feel quite a bit cooler.
The high pressure over the Florida peninsula will move eastward out into the Atlantic overnight as a cold front pushes closer to northern Florida. The pressure gradient over the local area will begin to tighten tonight as the aforementioned cold front approaches the Florida peninsula, however winds will not start to increase until late Friday. Overnight temperatures will still be below average for this time of year, with minimum temperatures dropping into the 40s with rural areas reaching the lower 40s, and the immediate coastal areas of the Treasure Coast will reach low 50s. The pressure gradient over the local waters will tighten overnight, as the high pressure moves eastward into the Atlantic, and a cold front moves closer to the local waters.
A cold front is moving east very quickly this evening. This should lower temperatures into the lower 30s mainly near and west of the I-65 corridor around daybreak.
Northwest flow aloft will spread snow across the high terrain north of the Treasure Valley late this evening. The highest totals are expected north of McCall.
Another round of light rain/snow is possible across central MO and southwest IL this afternoon and evening as a weak cold front drops southeastward through our area.
The passage of a cold front will create backing surface winds. /issued 350 AM CST Fri Feb 5 2021/ SHORT TERM (Now through Saturday): The most recent surface analysis indicated a cold front near the border of the CRP and BRO CWFAs. This front is expected to pass through the Rio Grande Valley and Deep South Texas as a whole today, with the best chance for rainfall over the lower Texas coastal waters and the immediate three coastal counties.
523 AM CST Fri Feb 5 2021 A large trough at 500mb will continue to dominate the weather picture through the period. A ridge of high pressure extending across central SD early this morning will build across the entire area today through Saturday.
The cooler temperatures are expected to occur in central Missouri with lows in the lower 20s. Some foreseeable negatives that work against accumulating snow include: - Afternoon snows typically do not accumulate as well when temperatures are near freezing. - Most of the CWA will experience temperatures above freezing during the morning and early afternoon. Therefore ground and road temperatures could be above freezing causing much of the snow to melt, especially in far southern Missouri. Far southern Missouri may not see much accumulating snow due to the warmer air temperatures and warmer ground temperatures.
SHORT TERM (Now through Saturday): The most recent surface analysis indicated a cold front near the border of the CRP and BRO CWFAs. This front is expected to pass through the Rio Grande Valley and Deep South Texas as a whole today, with the best chance for rainfall over the lower Texas coastal waters and the immediate three coastal counties.
322 AM CST Fri Feb 5 2021 A large trough at 500mb will continue to dominate the weather picture through the period. A ridge of high pressure extending across central SD early this morning will build across the entire area today through Saturday.
Early this morning, broad mid-level troughing is present over most of the CONUS, leaving the forecast area in northwesterly flow. At the surface, high pressure covers the central and southern plains. Areas near the KS/NE border and especially in far northeast KS look to stay cooler in the 30s as they remain under more cloud cover. Lows overnight into Saturday morning are forecast in the mid teens to low 20s, but with increasing clouds ahead of the Saturday system, these could end up being warmer than the current forecast.
/22/ Today and tonight: Latest surface analysis had the cold front southeast of our CWA but anafrontal rain was still noted on local radar across the Interstate 59 corridor. The cold front is expected to stall near the Gulf coast this morning. In the wake of the cold front, temperatures will be cooler than normal today only topping out in the lower 50s at most locations. Temperatures tonight will be close to normal ranging from the lower 30s northeast to near 40 south.
Early this morning, a very large upper level low pressure trof could be seen situated over most of the continuental United States, with an upper ridge off the west coast. High temperatures will hover near normal today and then climb a few degrees this weekend and into the low to mid 70s over the lower deserts.
546 AM CST Fri Feb 5 2021 The main forecast concerns will be snowfall amounts tonight into Saturday morning and the advancement of an arctic cold front. This arctic cold front will begin to move into the area this evening and should advance south and west of the area by Saturday morning. An upper trough is already established across the Northern and Central U. Behind the arctic cold front, models do differ on the location of the snowfall band. The highest snowfall totals to around 5 inches over much of Custer County. The forecast highs Saturday have trended down slightly to the upper 20s far southwest to the low teens northeast.
Do not expect a long period of lingering precipitation in the ridges as WSW low- level flow is not favorable for upslope. While the initial wind gusts with the cold frontal passage have subsided a bit, dry air aloft and cold advection will continue to allow the stronger wind aloft to mix down to the surface. Wind gusts of 25 to 30 mph are expected today, with gusts up to 40 in the higher elevations.
A closed upper low over northwest Ontario will loosen its grip on the Northland this morning as it begins to drift slowly off to the east. Expect all of these features to move east or dissipate this morning as the closed low departs. High pressure builds into the region from Canada tonight with some clearing.
Issued by National Weather Service Lake Charles LA 434 AM CST Fri Feb 5 2021 The latest cold front push through last night into this morning with temperatures into the 50s acrs the area. The pattern in the atmosphere remains very progressive with a broad upper level low that spans from the west coast to the east coast. the progressive pattern will push through another cold front Saturday evening timeframe.
524 AM CST Fri Feb 5 2021 Welcome to the first day of a long stretch of below normal temperatures across the Lower 48.
320 AM CST Fri Feb 5 2021 Welcome to the first day of a long stretch of below normal temperatures across the Lower 48.
Increasing cloudiness tonight as the upper trough approaches from the northern and central Rockies. Cold front tracks south and east across the forecast area after 06Z Saturday and by 12Z Saturday.
402 AM CST Fri Feb 5 2021 The main forecast concerns will be snowfall amounts tonight into Saturday morning and the advancement of an arctic cold front. This arctic cold front will begin to move into the area this evening and should advance south and west of the area by Saturday morning. An upper trough is already established across the Northern and Central U. Behind the arctic cold front, models do differ on the location of the snowfall band. The highest snowfall totals to around 5 inches over much of Custer County. The forecast highs Saturday have trended down slightly to the upper 20s far southwest to the low teens northeast.
Winds will diminish by late this aftn and turn more easterly as a high pres ridges into the area. /ISSUED Issued by National Weather Service Lake Charles LA/ The latest cold front push through last night into this morning with temperatures into the 50s acrs the area. The pattern in the atmosphere remains very progressive with a broad upper level low that spans from the west coast to the east coast. the progressive pattern will push through another cold front Saturday evening timeframe.
Intermittent cloud cover will continue for the bulk of today as satellite imagery shows clouds pushing southeast towards southern MN, and the lower banks of clouds will likely see at least flurries falling from them much of the day.
As this high makes its way into the central CONUS Saturday, strong cold air advection from the north and widespread cloud cover override any temperature gains from diurnal processes resulting in a trend of frigid temperatures. Starting with the snow, the surface Canadian high runs into a passing leeward low pressure system to our west and south. The low and high compete for spatial dominance. The spatial relationship of these dueling cyclones will be paramount in determining where, how long, and how much snow will fall.
348 AM CST Fri Feb 5 2021 Today and tonight: Latest surface analysis had the cold front southeast of our CWA but anafrontal rain was still noted on local radar across the Interstate 59 corridor. The cold front is expected to stall near the Gulf coast this morning. In the wake of the cold front, temperatures will be cooler than normal today only topping out in the lower 50s at most locations. Temperatures tonight will be close to normal ranging from the lower 30s northeast to near 40 south.
Upper level analysis shows low pressure over central Canada, with large trough covering the central into eastern US.
Westerly component flow ahead of a weak cold front will allow temperatures to warm into the 50s before its passage this afternoon across central and southern Kansas.
Over The Weekend: An intense long wave trough will remain in place over the CONUS this weekend.
Highs should range from the single digits west to the lower teens far northeast.
643 AM EST Fri Feb 5 2021 A cold front will be approaching the region early this morning, then will move through the area today. Weak upper troughiness over the E CONUS. Winds expected to gradually veer to light NE tonight as high pressure settles into the region. A broad upper trough crossing the conus keep a southwest to west flow aloft over the region.
As the ridge slides east today, west to southwest winds will return, helping to boost temperatures well into the 50s.
Gusty winds will also be possible along the coast and area ridgetops through Saturday. High pressure over the Northeast Pacific will continue to promote dry weather and some gusty north winds during the afternoon.
High pressure aloft off the West Coast and weak offshore flow will bring warming for today and Saturday with Saturday high temperatures 5 to locally 10 degrees above average.
Plains trough will move eastward towards the area Saturday, bringing precip chances in mainly during the evening and overnight. 850 mb temps dont warm up much over the next few days, and the warm front associated with the Plains trough will slide to our east. Surface temps should be above freezing for most, but a rain snow mix will be possible starting in the evening as temps cool after sunset.
Cold front is now poised offshore, with NE winds 10-15 KT at the southern terminals and less than 10 KT at AEX. /issued 308 AM CST Fri Feb 5 2021/ Cold front moved through the region last night and exited the south central coast this morning as temperatures dropped and dew points are now in the 30s.
417 AM EST Fri Feb 5 2021 A cold front is sweeping through the SE bringing a thin line of rain with it. As the cold front drives south it stalls along the Florida panhandle. An inverted trough will lift warm air into the front, pushing the system back north and into the CWA where another round of wet weather is likely tomorrow.
300 AM PST Fri Feb 5 2021 Mornings with patchy dense fog are possible with high pressure overhead. A warming trend over the weekend is forecast to occur as high pressure builds. Calm conditions this morning as high pressure begins to take hold over the region. After the rain we had last week, there is enough moisture in the lower levels to generate fog in the morning now that we are under the influence of a ridge of high pressure.
Weak high pressure is building in behind the front and surface are diminishing across the Mid-South.
The cold front pushed across Corpus Christi and much of the CWA early this morning and should continue moving southward clearing our southern counties by mid-morning. A reinforcing cold front is expected to push through South Texas late tomorrow afternoon into tomorrow evening pushing this current front through and providing another burst of cool air. With today's cold front stalling across the offshore waters, a chance of showers will be possible across the offshore waters with only slight chance of showers of across the Coastal Bend. With the cloud cover hanging around today and tonight, am expecting temperatures to remain cooler during the day and milder at night as compared to most models due to the lack of daytime heating and radiational cooling.
Early this morning, a very large upper level low pressure trof could be seen situated over most of the continental United States, with an upper ridge off the west coast. High temperatures will hover near normal today and then climb a few degrees this weekend and into the low to mid 70s over the lower deserts.
226 AM MST Fri Feb 5 2021 An Arctic cold front will move south through the forecast area today and tonight and bring bitter cold airmass into the region for a long stay. Arctic high pressure moves in during the day on Saturday with dry and cold weather in most areas.
Drier air has moved in behind the cold front that affected the area today.
The strong cold front has pushed through the CWA and much colder air continues to pour into the region. As the low over northern Lake Michigan moves north toward Superior, the pressure gradient, and thus the wind, will begin to decrease to the 30-35 mph range by mid morning. There is another wave that rotates through the upper trough this afternoon and that will result in a flareup of snow from late this afternoon through the evening.
Cooler today under lots of sunshine with highs near early February normals. This weekend: NW flow aloft continues but it will be warmer thanks to low level thickness rises.
Highs across the plains will be mainly in the lower to mid 40s. In addition it will remain windy over the higher passes with blowing snow and poor visbility. Late tonight a cold front may affect the far nern plains.
Rain will continue to be light as available moisture is limited in the low and mid levels. /Issued 417 AM EST Fri Feb 5 2021/ A cold front is sweeping through the SE bringing a thin line of rain with it. As the cold front drives south it stalls along the Florida panhandle. An inverted trough will lift warm air into the front, pushing the system back north and into the CWA where another round of wet weather is likely tomorrow.