Aikyam-Lab/Synoptic-Bench huggingface dataset:
348 PM CST Mon Dec 9 2019 Patchy fog and drizzle along with a few brief showers will continue into the evening followed by much colder temperatures and clearing skies overnight behind a strong cold front. a cold front was near I-57 pushing rapidly eastward, with temperatures beginning to drop rapidly behind the front. A weak upper level trough with a history of snow showers is trailing the surface front, however recent trends have greatly diminished the activity along the upper trough as the main lift shifts northward.
The MS Valley mean trough will be our main weather influence until heights begin rising by midweek, with two brief, minor precip windows through that transition.
726 PM EST Mon Dec 9 2019 Rain is expected through part of Tuesday with a crossing cold front. Areas of rain should continue to cross the region tonight with the approach and passage of a cold front. By Tue afternoon, however, the initial continental cold front will be through, likely supporting a non- diurnal trend in temperature (steady to falling thru the day) as a result of strong cold air advection. Moisture will stall in the region Tue/Tue night as the primary upper trough lingers to the west. The true cold, dry air will invade the region on Wed as the ern- CONUS trough/jet exit ewd and high pressure builds. Cig restrictions, LLWS potential, and scattered showers will continue until the passage of a cold front in the morning.
Tomorrow's weather will be very similar today, with a cool start to the day and a warm afternoon as highs climb into the low-to-mid 80s.
A subtle feature is currently making its way through the region which could allow for the development of light snow showers over the higher terrain, especially around Glacier National Park.
Warmer SW flow will allow much of NE WY and the higher elevations of the Black Hills to warm up into the 30s to near 40, while locations further east on the SD plains will remain cold.
Patchy fog and cooler temperatures tonight. The low over central to south-central Arizona continues to bring areas of valley rain and mountain snow showers with isolated embedded thunderstorms. This will continue through the late afternoon hours before ending from the west with partial clearing overnight as the low merges into the base of the broad trough downstream. We'll probably have enough residual boundary layer moisture and patchy cloud cover to keep from reaching the cold potential of the airmass Tuesday morning, but still freezing in some colder valleys east and south of Tucson. Primarily gusty winds and cooler temperatures by next Monday or Tuesday.
516 PM CST Mon Dec 9 2019 A cold front's passage later today into this evening will lead to a big change in airmass, as highs today near or in the 60s plummet a good 30 degrees tomorrow. Little change off the blend occurs otherwise, as the models are fairly straightforward with the development of a Gulf Coastal trof that places us to the north of the main impact/pcpn field heading into the weekend.
515 PM CST Mon Dec 9 2019 Patchy fog and drizzle along with a few brief showers will continue into the evening followed by much colder temperatures and clearing skies overnight behind a strong cold front. a cold front was near I-57 pushing rapidly eastward, with temperatures beginning to drop rapidly behind the front. A weak upper level trough with a history of snow showers is trailing the surface front, however recent trends have greatly diminished the activity along the upper trough as the main lift shifts northward.
324 PM CST Mon Dec 9 2019 This afternoon the mid level trough that moved across eastern Kansas this morning was moving off into the mid mississippi valley at 21Z. This will bring an increase in clouds to the northern counties Tuesday afternoon and there could be a few flurries in north central Kansas as well as the energy moves through the upper trough.
Arctic high pressure will take the region to 15 to 20 below zero lows Wed morning, with corresponding wind chill/apparent temp values from 30 to 35 below. SKC this afternoon with relatively light winds will give way to another cold front and possible light snow first near DVL in the 6 to midnight time frame and then into the valley late this evening into the overnight.
Winds may relax enough tonight to permit some patchy sea fog formation, with VSBYS already reduced owing to 70 degree dewpoint air advecting over cooler shelf waters. Rest of the area expected to see falling temperatures through the day with post-frontal rains continuing as the upper trof approaches from the west. 13 A light to modest onshore flow will prevail tonight into Tuesday with a strong cold front pushing through the coastal waters through the day.
High pressure will remain over the area through tomorrow afternoon, with south/southeast winds 10-15 kts.
650 PM EST Mon Dec 9 2019 Mild temperatures and areas of light rain will continue into this evening in advance of a cold front. Gusty winds and much colder air will filter in behind this cold front tonight into Tuesday, with temperatures on Tuesday steady in the mid 20s to low 30s.
Northwest flow aloft tomorrow then keeps cooler temperatures in place with only little improvement compared to today.
Winds have been diminishing in the advisory area, and while it may be borderline for a wind advisory for the next few hours in some of the higher elevations, areal coverage of any 40+ mph gusts should be quite limited so have allowed wind advisory to expire on schedule. Chattanooga Airport, TN 57 61 32 50 / 80 90 90 20 Knoxville McGhee Tyson Airport, TN 54 58 30 45 / 80 90 90 20 Oak Ridge, TN 53 57 27 45 / 80 90 90 10 Tri Cities Airport, TN 55 56 30 42 / 80 90 90 30.
This afternoon the mid level trough that moved across eastern Kansas this morning was moving off into the mid mississippi valley at 21Z. This will bring an increase in clouds to the northern counties Tuesday afternoon and there could be a few flurries in north central Kansas as well as the energy moves through the upper trough.
/issued 258 PM CST Mon Dec 9 2019/ A cold front moved southward across the area this morning, leaving a chillier airmass in its wake.
Broad upper trough encompassed much of CONUS with northwesterly flow aloft over the CWA. Cold front that pushed through the area last night extended from the Mid-MS Valley to the Southern Plains. The leading edge of colder air was entering northern MT/ND, and will push southeast through the High Plains tonight.
/Issued 240 PM CST Mon Dec 9 2019/ A polar cold front moved across the combined Panhandles this morning, which has resulted in temperatures remaining in the upper 30s and lower 40s through the afternoon. High clouds over the region being brought in ahead of a upper level low in southern Arizona has prevented much insolation from making it to the surface, resulting in temperatures holding steady through the day. Given the lackluster moisture profiles and the fact that most of the PVA with the upper low will move across the Big Bend and southern Texas, there is no precipitation anticipated with this disturbance through tomorrow.
838 PM CST Mon Dec 9 2019 Patchy fog and drizzle along with a few brief showers will continue into the evening followed by much colder temperatures and clearing skies overnight behind a strong cold front. a cold front was near I-57 pushing rapidly eastward, with temperatures beginning to drop rapidly behind the front. A weak upper level trough with a history of snow showers is trailing the surface front, however recent trends have greatly diminished the activity along the upper trough as the main lift shifts northward.
The weak thermal ridging with this warm push may bring some patchy light snow and flurries to the area with a bit better chance in central SD towards northeast NE. By early Tuesday morning temperatures will fall to 5 below to 5 above in most locations but just a touch warmer near the Missouri River. Tuesday will prove to be cold, but with much less wind than today as a weak ridge of high pressure moves through.
An approaching short wave trough and trough pushing into the PacNW will bring increasing high clouds this evening and continuing overnight. The high clouds will likely limit some fog development tonight but conditions still favor some patchy dense fog across the southern Sacramento Valley south into the San Joaquin Valley.
906 PM EST Mon Dec 9 2019 Rain is expected through part of Tuesday with a crossing cold front. Areas of rain should continue to cross the region tonight with the approach and passage of a cold front. By Tue afternoon, however, the initial continental cold front will be through, likely supporting a non- diurnal trend in temperature (steady to falling thru the day) as a result of strong cold air advection. Moisture will stall in the region Tue/Tue night as the primary upper trough lingers to the west. The true cold, dry air will invade the region on Wed as the ern- CONUS trough/jet exit ewd and high pressure builds. Cig restrictions, LLWS potential, and scattered showers will continue until the passage of a cold front in the morning.
151 PM PST Mon Dec 9 2019 Fair and warmer weather is expected this work week as high pressure and weak offshore flow take hold of the region.
02z surface analysis had low over KABR with cold front into southwest SD. Warmer SW flow will allow much of NE WY and the higher elevations of the Black Hills to warm up into the 30s to near 40, while locations further east on the SD plains will remain cold.
905 PM PST Mon Dec 9 2019 Building high pressure over the West will bring dry, mild weather this week.
303 AM EST Tue Dec 10 2019 Broad upper/mid level troughing is currently sprawled across much of the continental US, with weak ridging centered over the Florida Straits. At the surface, the sub tropical ridge axis extends from the Atlantic across the central Florida Peninsula into the eastern Gulf of Mexico, while a cold front associated with the upper level troughing is pushing into the Gulf Coast region. This low level moisture is already leading to some patchy fog over the interior, which should continue to expand in coverage through just after sunrise this morning.
Return flow out of the southwest will prevail across southwestern Kansas with leeside troughing developing over eastern Colorado. By mid morning, only a few clouds visible with southwest winds picking up to 15-20 mph due to the aforementioned leeside trough coupled with the eroding temperature inversion due to mixing to the surface. Afternoon high temperatures will rebound back around the 50 degree mark due to the downsloping nature of the low level wind flow. Low temperatures overnight will again drop into the low 20s for much of the CWA.
1051 PM CST Mon Dec 9 2019 Cold front has cleared the terminals late this evening and expect north winds to increase into the 15-20 knot range with stronger gusts around 25-30 knots through most of the night. Upper air analysis this morning showed nearly zonal flow across Texas and a trough over the southwest US. At the surface, there was a cold front moving into North Texas. The cold front will be on our northern border at the start of this period and move through our CWA tonight. Temperatures will drop below freezing across much of the northern part of the CWA mainly along and north of I-35/Hwy 90.
1012 PM CST Mon Dec 9 2019 As the cold front makes its way into northern portions of SE TX, we are starting to see some patchy development along it. Prefrontal trough being overtaken by the faster moving cold front between Cameron and Hearne and just entering the CWA at 01z. As the cold front gets closer and temperatures fall very slowly from their record afternoon highs expect ceilings to lower and MVFR ceilings to develop between 01 and 04z. Cold front should usher in ceilings of 1500ft or lower and should see an aggressive increase in showers across the region in the next two hours.
1040 PM EST Mon Dec 9 2019 Currently - A surface Atlantic pressure ridge extends west southwestward across the Florida Peninsula and extends across the Gulf of Mexico. This evenings sounding indicated fairly high moisture through the lower layers with an inversion based around 800 mb. After some earlier activity across the Lower Keys, only a few showers dot the area. This flow has brought in increased surface moisture as well, and dew points are slowly climbing through the lower 70s and temperatures remain in the upper 70s. Short Term Update - Ridging will remain the dominant feature overnight keeping winds moderate out of the east. A ridge across the Florida Peninsula is maintaining moderate to fresh mainly easterly breezes across Keys waters.
Avery Slightly warmer, yet still below normal, temperatures will be found today. Higher pressure will begin to build into the area Tuesday, bringing drier and slightly warmer conditions to the region through mid week.
1123 PM CST Mon Dec 9 2019 Patchy fog and drizzle along with a few brief showers will continue into the evening followed by much colder temperatures and clearing skies overnight behind a strong cold front. a cold front was near I-57 pushing rapidly eastward, with temperatures beginning to drop rapidly behind the front. A weak upper level trough with a history of snow showers is trailing the surface front, however recent trends have greatly diminished the activity along the upper trough as the main lift shifts northward.
A bit higher winds overnight should result in warmer lows.
Lows tonight in the low to mid 20s will then be close to climitological norms.
Upper ridge along the coast this evening will shift east through our CWA Tuesday keeping us dry through the day.
Will expect lowering of CIGs to MVFR/IFR and continued BR through the night ahead of the approaching cold front.
Lows are expected down into the mid/upper teens(F) to the lower/mid 20s(F). Temperatures will rebound Tuesday as a weak lee side trough of low pressure develops in eastern Colorado, setting up light across southwest Kansas. This will draw warmer air into the area pushing H85 temperatures up well above 0C. Should see highs up into the 40s(F) Tuesday afternoon with temperatures pushing the lower 50s(F) near and along the Oklahoma border.
Highs today should stay below freezing north of the MO River.
1139 PM CST Mon Dec 9 2019 A cold front's passage later today into this evening will lead to a big change in airmass, as highs today near or in the 60s plummet a good 30 degrees tomorrow. Little change off the blend occurs otherwise, as the models are fairly straightforward with the development of a Gulf Coastal trof that places us to the north of the main impact/pcpn field heading into the weekend.
A cold front continues to slide south across the I-20 corridor and will swing winds to the northeast overnight.
A high pressure system continues to dominate the areas weather with dry conditions.
1252 AM EST Tue Dec 10 2019 Gusty winds and much colder air will continue to filter into the region today in wake of a strong cold frontal passage.
A weak mid-level trough rotates southeast out of the Dakotas tonight after midnight into early Wednesday morning for a chance of light snow across portions of northeast IA into far southwest WI.
407 AM CST Tue Dec 10 2019 A band of precipitation remains across southeast Oklahoma well behind the cold front. The surface freezing line has been steadily moving toward this band of precipitation over the last several hours. At the time of this writing, mesoanalysis showed positive 3 degrees C temps across SE OK with much cooler temps analyzed at the 700mb level (approximately -4C) while the 925mb and surface temps are approximately 1 or 2 C. This thermal profile would likely suggest a mix of freezing rain and sleet over the next few hours as the freezing line overtakes the back edge of the band of precipitation.
Wednesday and Wednesday night: Increasing zonal flow aloft will promote the deepening of a lee trough over the High Plains, which in turn will support the erosion of the arctic air mass deposited over the mid MO Valley.
643 AM EST Tue Dec 10 2019 Gusty winds and much colder air will continue to filter into the region today in wake of a strong cold frontal passage.
The short term will be dry as more zonal flow aloft followed by widespread high pressure impact the Ohio Valley.
The trough will continue to slowly drift eastward and the front has passed through central Indiana leaving behind cold but dry air today with highs near 30 degrees. The short term will be dry as more zonal flow aloft followed by widespread high pressure impact the Ohio Valley.
414 AM CST Tue Dec 10 2019 As of this writing, a strong cold front bisects the region roughly from near Alexandria southwest to DeRidder to just north of Beaumont. Temperatures immediately behind the front are running 10 and 15 degrees cooler.
This morning, broad cyclonic flow continued in the mid-levels with a low pressure centered over northeastern Canada and a high amplitude ridge over the western coast. An Arctic air mass delivered by the long northerly fetch associated with the mid- level cyclone was locked in place this morning over much of the central US. Ahead of the cold front associated with this wave and under increasing DCVA, weak warm air advection is expected to develop and tighten a baroclinic zone over far southwestern North Dakota.
High pressure aloft will move east across the Great Basin through early Wednesday.
The cirrus is expected to gradually push slowly south today as longwave trough over the central CONUS slowly moves to the east.
350 AM CST Tue Dec 10 2019 Cloud cover continues to diminish across and upstream of the CWA this early morning as high pressure settles in across the Northern Plains. Northeastern SD and west central MN has a better chance at staying mostly clear as another high pressure system builds in. This will translate to daytime high temperatures being a bit warmer than the day before. High pressure continues to retreat to the southeast, with warm air advection, though with a southeast surface component so expect a steep inversion and really minimal temperature recovery at the surface.
Meanwhile, northwesterly winds aloft behind the main trough are driving midlevel clouds southeast across the forecast area. Temperatures will warm to near normal in the upper 40s and lower 50s as the cooler air mass from the polar front yesterday continues to linger.
327 AM PST Tue Dec 10 2019 A trough will move through the Central California Interior by Wednesday morning which may bring a few showers to the Southern Sierra tonight.
/Issued 407 AM CST Tue Dec 10 2019/ A band of precipitation remains across southeast Oklahoma well behind the cold front. The surface freezing line has been steadily moving toward this band of precipitation over the last several hours. At the time of this writing, mesoanalysis showed positive 3 degrees C temps across SE OK with much cooler temps analyzed at the 700mb level (approximately -4C) while the 925mb and surface temps are approximately 1 or 2 C. This thermal profile would likely suggest a mix of freezing rain and sleet over the next few hours as the freezing line overtakes the back edge of the band of precipitation.
Mostly sunny skies are expected today as the lower clouds move off to the east and high clouds remain. Temps should remain well below normal today and again tonight, but then begin to moderate back to at or above freezing tomorrow over most of the area. Then series of troughs are forecast to move through the midwest during the weekend and the first part of the new week. So, going forecast will still have chances of rain and snow with cooler temps. A cold front has passed across central Illinois leaving gusty northwest winds and MVFR stratus in its wake.
Issued by National Weather Service Glasgow MT 439 AM MST Tue Dec 10 2019 Generally dry and warmer conditions expected across the region today. Higher pressure will begin to build into the area today, bringing drier and slightly warmer conditions to the region.
Mostly sunny skies are expected today as the lower clouds move off to the east and high clouds remain. Temps should remain well below normal today and again tonight, but then begin to moderate back to at or above freezing tomorrow over most of the area. Then series of troughs are forecast to move through the midwest during the weekend and the first part of the new week. So, going forecast will still have chances of rain and snow with cooler temps.
Cloud cover continues to diminish across and upstream of the CWA this early morning as high pressure settles in across the Northern Plains. Northeastern SD and west central MN has a better chance at staying mostly clear as another high pressure system builds in. This will translate to daytime high temperatures being a bit warmer than the day before. High pressure continues to retreat to the southeast, with warm air advection, though with a southeast surface component so expect a steep inversion and really minimal temperature recovery at the surface.
Will keep a mention of a little light rain or wet snow with surface temps falling to near freezing, but not expecting any impacts to travel.
Highs today should stay below freezing north of the MO River. High pressure accompanied by arctic air is moving through the area this morning. Unfortunately, those north of the MO River, will stay below freezing today, with those south of the MO River, reaching the mid to upper 30s. Tonight into Wednesday morning should be slightly warmer than this morning with the return of southerly surface winds, but lows should still dip into the teens and 20s with wind chills in the teens across the area. A warm front will move north during the day Wednesday, bringing everyone at or above freezing for highs.
Today Through Wednesday Night Early this morning, a cold front was well to the south/southeast of Arkansas. Cold air continues to advect in, with subfreezing air gradually overtaking the Ozarks. A big concern tonight will be refreezing. Though we aren't expecting any significant impacts from wintry precipitation, any wet roads could re-freeze late tonight/early Wednesday morning as high pressure moves in, winds diminish, and temperatures fall into the 20s. High pressure will quickly shift through the area Wednesday, with a warming trend noted.
410 AM EST Tue Dec 10 2019 Gusty winds and much colder air will continue to filter into the region today in wake of a strong cold frontal passage.
It will also remain windy, over the higher terrain, with some gusts up to 50 mph and blowing snow over the higher passes. Winds will decrease over the higher terrain as component along winds are under 20 kts.
404 AM MST Tue Dec 10 2019 Upper level analysis has large trof across the northern CONUS with ridge over the West Coast. At the surface, Arctic high pressure resides across the Northern Plains with temperatures at 3am in the single digits and teens. Accumulations will be less than half an inch across the Plains, to around an inch in the higher elevations of the northern Black Hills.
424 AM MST Tue Dec 10 2019 Upper level analysis has large trof across the northern CONUS with ridge over the West Coast. At the surface, Arctic high pressure resides across the Northern Plains with temperatures at 3am in the single digits and teens. Accumulations will be less than half an inch across the Plains, to around an inch in the higher elevations of the northern Black Hills.
212 AM PST Tue Dec 10 2019 Building high pressure over the West will bring dry, mild weather this week.
Surface temperatures across the region are generally in the mid to upper 30s, with a few spots right near freezing. Clear skies and light winds will allow for a cold night with temperatures dropping below freezing area wide.
If clouds linger longer than expected, temperatures may not warm as much as is forecasted for this afternoon, but if clouds clear out quicker than expected slightly warmer temperatures than forecast could be possible.
Winds will begin to veer to south to southwest overnight as the next cold front approaches.
Minor snow accumulations are expected, mostly limited to the ridges and higher elevations.