Aikyam-Lab/Synoptic-Bench huggingface dataset:
Mostly dry conditions expected across SE GA, with less fog potential due to drier air filtering southward under the ridge axis. A dreary and moist night, with a continuation of above normal temps, but cooler than recent nights, ranging in the 50s for most areas, near 60 toward Ocala. Augustine) up to 7 ft in response to a strengthening pressure gradient with high pressure wedge axis nosing across south GA.
545 PM CST Tue Feb 13 2018 Mid-level clouds have been stubborn to dissipate within a region of weak lift ahead of an upstream upper trough. However, clouds should be on the decrease through late afternoon with increasing mid/upper level subsidence as the trough swings through the area. 35 inches), so the lower clouds may skirt by mainly to the southeast.
823 PM EST Tue Feb 13 2018 High pressure will drift east and off the New England coast tonight.
Otherwise, mild conditions to persist with lows tonight in the 30s and highs on Wednesday in the low 50s to low 60s despite the cloud cover.
940 PM EST Tue Feb 13 2018 High pressure will drift east and off the New England coast tonight.
Temperatures this afternoon are generally 2 to 6 degrees warmer than the same time yesterday. This will allow portions of the northern Sacramento Valley to cool off more, with lows in the mid 30s expected compared to the low to mid 40s of this morning. General airmass warming will bring a little warmer temperatures to the mountains and foothills overnight, though. Cloudier skies and cooler temperatures are expected for Wednesday, as the next low begins to move in.
Seasonably cool temperatures persist this afternoon in response to a mid/upper level trough positioned over the region. Meanwhile, a cutoff low has developed off of the southern California coast and is resulting in a few/scattered clouds over the higher terrain of Monterey and San Benito Counties. A slight warming trend is then forecast for late week as the aforementioned mid/upper level trough shifts inland and a ridge of high pressure builds over the eastern Pacific.
The two locations with the highest winds observations. Mixing overnight combined with the warmer airmass in place will keep temperatures in the teens to near 20. Parts of the southern valley where minimal snow pack exists may see the low 40s.
The heaviest snow cover looks to be over Northern Sheridan, Pine Ridge and through central Cherry county where the last event dropped from 8 to 12 inches of snow in a narrow band. Ridge building east with warm front through the Panhandle on Wednesday. A cold front will begin to move into northern Nebraska Wednesday night.
An upper level low pressure system off the southern California coast will begin to move inland on Wednesday causing the flow aloft to strengthen over the panhandles.
Low temperatures are still expected to only drop to the lower 70s for much of the southeast Florida metro area.
The good news is that pavement temperatures should be warm enough to preclude a threat for freezing drizzle.
Chattanooga Airport, TN 47 61 58 72 / 50 80 70 30 Knoxville McGhee Tyson Airport, TN 46 59 58 70 / 40 80 80 40 Oak Ridge, TN 45 57 56 70 / 50 90 80 50 Tri Cities Airport, TN 43 59 54 69 / 40 90 80 60.
Adjusted temperatures to match current obs trends as many areas were warmer than the previous forecast. With strong southerly winds and cloud cover overnight, as well as rainfall, temperatures should linger in the low to mid 50s for most of the mid state.
However, some of these readings could be a few degrees cooler if the cloud cover is much greater.
Upper level trough is still on track and approaching the area this evening. A cold front moving through the area Wednesday will increase the presence of lowered ceilings and prevailing shower activity with associated MVFR to IFR conditions.
trough stretched from the northern plains through central CA per the water vapor imagery. Think temps could drop off into the lower and mid 30s for lows.
700 PM EST Tue Feb 13 2018 A cool wedge of high pressure will build into the area tonight.
620 PM EST Tue Feb 13 2018 Warmer and wet weather will return through the week before a brief cool down to start the weekend.
However, sly flow at the sfc will return overnight, ushering in a much warmer airmass that will hold steady or even warm our temps through the overnight hours.
A disturbance of low pressure is still anticipated to drop out of British Columbia tonight and swings through the Northern Rockies on Wednesday.
Ahead of the cold front for Wednesday, mid and low level winds will be quite strong. Even with warmer than normal temperatures forecast for Wednesday, the push of colder air with the snow will keep the precip type as all snow as it slowly slides southward through all of northeast Montana.
An east to northeast surge will result in slightly stronger east to northeast flow, generally 10 to 15 knots later tonight, otherwise high pressure is forecast to settle over Florida during midweek and remain in the vicinity through the weekend with light winds and seas 2 feet or less.
The low Wednesday night will occur in the evening and then gradually rise through the night. A west-east subtropical ridge extending from the Gulf of Mexico to the Caribbean will help rotate high precipitable water northeast into the Tennessee and Ohio Valleys via an enhancing subtropical jet.
744 PM EST Tue Feb 13 2018 Warmer and wet weather will return through the week before a brief cool down to start the weekend.
616 PM EST Tue Feb 13 2018 High pressure will move east of the region tonight, resulting in an increasing cloud cover and warmer temperatures through mid week.
/issued 315 PM CST Tue Feb 13 2018/ An upper trough extends to the southwest off the coast of California. Due to the increase in low-level moisture, patchy fog and/or low clouds will be possible across eastern portions of the Permian Basin and the Lower Trans Pecos tonight/Wednesday morning. Not much change is expected in the upper pattern for Wednesday, except an upper trough moving over the Pacific Northwest. This will reinforce the upper trough off the coast of California.
/Issued 608 PM EST Tue Feb 13 2018/ At the surface, weak wedge will continue to prevail as high pressure builds into the area from the northeast tonight and Wednesday. Meanwhile, ridging aloft will build into the Gulf. With ridging south of the area, near zonal flow aloft will bring weak disturbances across the area.
A cold front will bring cooler temperatures to most places and very light rain to Humboldt and Del Norte counties Wednesday.
Even with a fair amount of cloud cover across the region Today, temperatures are warmer than the highs from yesterday.
The clouds have kept temperatures in check so far in the low 40s, however some clearing has taken place across the western portion of the CWA early this afternoon and temperatures have increased into the upper 40s. Some gusty winds are expected on Wednesday ahead of a developing low pressure system in the plains.
A wedge of high pressure is in place tonight over the mid- Atlantic, with cold air damming over the southeastern states.
/Issued 233 PM EST Tue Feb 13 2018/ At the surface, weak wedge will continue to prevail as high pressure builds into the area from the northeast tonight and Wednesday. Meanwhile, ridging aloft will build into the Gulf. With ridging south of the area, near zonal flow aloft will bring weak disturbances across the area.
508 PM CST Tue Feb 13 2018 Mostly sunny skies and slightly warmer temperatures returned to the local area today as the low level flow turned southerly and warmer air began to advect across the local area. This has led to the first afternoon in over a week with high temperatures topping above freezing for much of our local forecast area. opted towards the cool side of guidance for Wednesday morning with most locations expected to bottom out in the lower 20s. as southerly flow at the surface continues with weak ridging across the upper layers of the atmosphere.
Tonight the warm front will continue northward as high pressure shift east of the area.
Earlier day rain showers have diminished, with perhaps a few sprinkles/drizzle still found right underneath low cloud bases on ridgetops near the Virginia state line. A developing lee trough across the Front Range of the Rockies, combined with a ridge axis across the eastern U. The corresponding southwest flow and passing thermal ridge axis will only make for temperatures dropping into the 40s.
Rain amounts will range from a quarter inch to half inch, with the highest amounts over southern Kentucky.
The upper level low pressure system over the California coast will drift further offshore tonight.
427 PM MST Tue Feb 13 2018 Current surface analysis shows remnants of arctic front stretching from eastern MT, to far eastern WY, to low pressure over southeast CO. Upper level analysis shows persistent northwest flow from southwest Canada through the Northern Plains, with an area of low pressure cutoff along the CA coast. Southwesterly winds can be expected in most areas, breezy at times over northeast WY, especially the higher elevations of Campbell County. Highs will be in the 40s across much of the area, possibly a bit cooler across parts of northwest SD. Clouds will begin to increase from the north and west in the afternoon as next cold front slides south across MT and ND.
Plus, with the temperatures running around 25F degrees warmer than last night, lows are expected to stay above zero tonight. This will give a much warmer head start to temperatures in the morning. Ahead of the cold front for Wednesday, mid and low level winds will be quite strong. Even with warmer than normal temperatures forecast for Wednesday, the push of colder air with the snow will keep the precip type as all snow as it slowly slides southward through all of northeast Montana.
202 PM PST Tue Feb 13 2018 An upper level low off the Southern California coast will move east on Wednesday, bringing a return of a few showers to the area throughout the day as well as through Wednesday evening.
Current surface analysis places troughing to the lee of the Rockies with high over the eastern United States.
Biggest concern remains with the lowering cloud deck, fog potential, and perhaps some light drizzle associated with all of this. High pressure advances into the southeast U. Light winds and sufficient cloud cover to the north supports highs in the low 70s, but afternoon clearing to the south provides highs in the low 80s for the Treasure Coast and Okeechobee.
Despite a weak upper level trough swinging through the area overnight, ridging will remain healthy through the lower and mid levels. High pressure to our north along with lower pressure across the western Caribbean will maintain a fairly tight pressure gradient across Keys waters. The weakest winds will be on the cooler gulf side waters due to decoupling.
The closed low off the California coast will open/deamplify and shift east at least partially phasing with northern stream wave.
Temperatures will remain mild as a result, with lows mostly in the lower 20s.
622 PM EST Tue Feb 13 2018 A cool wedge of high pressure will build into the area tonight.
607 PM EST Tue Feb 13 2018 High pressure will move off to our east tonight and Wednesday.
951 PM EST Tue Feb 13 2018 High pressure will move off to our east tonight and Wednesday.
Temperatures tomorrow will be warmer again due to warm advection from the westerly flow.
417 PM MST Tue Feb 13 2018 Trough is in place from the northern plains across the Western US, with west-southwest flow extending across the Central Rockies and Central High Plains. A stalled warm front has slowly lifted north, but cooler air has held in place across our norther CWA were persistent snow pack in place. At the same time high clouds will be increasing Wednesday and this lowers confidence on highs despite moderation in air mass aloft. For now lows are expected to drop below 30F (possibly into the teens in our north) tonight, with above freezing lows possible Wed night. Highs Wed could be into the lower 70s, but this will depend highly on how much clearing we have before opaque clouds move in.
535 PM EST Mon Jan 15 2018 Dry and cool Canadian high pressure will remain in control of the region into Tuesday.
A strong jet streak is pivoting around the upper low resulting in near meridional flow over the northern and central plains. At the surface, a cold front continues its push southward, and is now nosing into the Permian Basin region. Most of the light freezing drizzle and flurries have ended across the area, with much drier air filtering in behind the front. The meridional flow aloft will shift further south as the trough takes a positive tilt tonight.
939 PM EST Mon Jan 15 2018 A clipper type low pressure system will move into the area overnight and remain through Tuesday evening, bringing light snow to the region. High pressure situated off the New England coast will slow the progression of the surface therefore prolonging the period of light snow over northeast Pennsylvania and the western Catskills.
448 PM MST Mon Jan 15 2018 Clouds and light showers associated with the cold front moving along the Front Range is showing up well on visible satellite this afternoon on an otherwise mostly sunny day. A narrow ridge of high pressure will amplify overhead for Tuesday keeping conditions dry and sunny.
This as the remnants of the upper trough exits to the southeast.
Latest obs at CKV are showing temperatures above freezing, but I don't think that's going to make much of a difference as we can get snow to the ground when it's 37-38 degrees. The radar is already showing returns in far southern KY and they're in the low 30s, so as this precipitation on the radar pushes into our far NW counties, look for this to be all snow.
540 PM CST Mon Jan 15 2018 (Tonight) Area of light snow has moved to the southeast of the area with decreasing clouds well behind the surface cold front. Northwest winds will lighten up a bit tonight but still remain on the order of 10-15mph and that combined with the low temperatures near zero will yield wind chill values of -15 to -20F for much of the area. Gosselin Despite upper level trof sliding through region Tuesday night, will only see an increase in clouds with its passage.
Low temperatures will be in the lower 30s in most inland areas but a few of the more efficient radiational cooling areas in very rural areas may drop into the upper 20s.
Light freezing rain and sleet was reported near Durant at about 7:30 PM. With colder and drier air advecting southward, expect the primary types to be sleet and/or snow (dependent on whether there are supercooled water droplets or ice crystals present) and not freezing rain; however, with such dry low-levels, precipitation will struggle to reach the surface (cloud bases are quite high and dew point depressions are large). By the time precipitation develops, temperatures will likely be cool enough for a mixed winter bag of precipitation types (freezing rain, sleet, snow) transitioning primarily to snow, although amounts are expected to be light.
527 PM CST Mon Jan 15 2018 Low cloud layer is quickly breaking up as much drier air spreads southward behind the latest cold front, now far south of our area. /issued 257 PM CST Mon Jan 15 2018/ The expected cold front has made its way south of the FA and has brought with it much cooler and windy conditions.
But models continue to show another short wave trough rotating around the upper level low in the Great Lakes, into the area late tonight and through tomorrow. Light snow/flurries will be possible with this next trough. While skies have partially cleared across all but the far SE KILX CWA, additional clouds associated with a sharp trough over the Great Lakes/Upper Midwest will pivot southward tonight.
Strong arctic cold front will be approaching the Southern Appalachian Region tonight. Chattanooga Airport, TN 27 31 12 27 / 10 60 30 0 Knoxville McGhee Tyson Airport, TN 26 30 11 24 / 10 70 40 10 Oak Ridge, TN 27 27 11 25 / 30 70 40 10 Tri Cities Airport, TN 23 34 12 21 / 10 60 50 10 NC.
/Tonight through Tuesday/ An elongated upper trough continues to spin aloft across the region and will drop down through Iowa tonight into Tuesday. A lobe of energy rotating around the center of the trough will drop through Iowa tonight. Clouds should start to diminish and erode during the day Tuesday as the upper trough begins to push east out of the region. Additionally winds will remain up with the tightened pressure gradient, with some diminishment into Tuesday as an area of high pressure builds into the region. Tuesday night will be quite cold again with a large high pressure area sliding by just to our southwest.
958 PM EST Mon Jan 15 2018 Low pressure near Detroit will move off to the east tonight while weakening to leave a trough hanging back into Lake Erie through Tuesday.
Upstream clouds/stratocu are rather patchy until you get well into IA, and the low level RH progs from the RAP really don't show much increase until overnight. Glass (Tonight) Area of light snow has moved to the southeast of the area with decreasing clouds well behind the surface cold front. Northwest winds will lighten up a bit tonight but still remain on the order of 10-15mph and that combined with the low temperatures near zero will yield wind chill values of -15 to -20F for much of the area. Gosselin Despite upper level trof sliding through region Tuesday night, will only see an increase in clouds with its passage.
Light snow of one inch or less was received across the region overnight last night through mid day today as the cold front pushed through the central high plains region on it's way to the southern high plains. During the day on Tuesday, temperatures over the far western sections of the forecast area will be a few degrees warmer than today due to the surface lee trough beginning to develop along the front range, while the highs over the far eastern sections will be a few degrees cooler as a result of the cold air extending further south into the southern plains.
853 PM EST Mon Jan 15 2018 Low pressure will bring light snow to the region tonight and Tuesday. No major changes were needed for the late eve update Great Lakes low pressure is poised to pull a cold front across the region during the near term. The advisory for the ridges for Tuesday was maintained. Near dawn Tuesday, the upper trough will pull moisture northward, focusing snow over more of our southern zones. This will lengthen the residence time of snow over the Ridges, ultimately boosting their totals from previous forecasts. The ridges could see 2-4" and despite the long duration event, a Winter Weather Advisory has been issued. Any remaining snow showers will continue to taper down Tuesday night in the wake of the cold front.
A strong Arctic cold front has just moved south of the San Angelo terminal. Temperatures are falling to freezing across Oklahoma and are well down into the teens across Kansas so the cold air is on schedule to arrive this evening and overnight. Still appears to be a mixture of light freezing rain and sleet. For much of the area, totals will be light and impacts will be fairly small and consists of some icy spots on bridges and overpasses. Again, freezing rain and sleet look the most likely based on soundings, although a changeover to a little snow is possible after 12Z Tuesday morning. Temperatures may actually climb above freezing across the northern Big Country, with other areas seeing readings close to the 30 degree mark.
917 PM EST Mon Jan 15 2018 High pressure will settle over the Carolinas and weaken in advance of the next strong cold front. In response, the local pressure gradient will weaken and veer the low-level flow to the northeast by daybreak.
High pressure over the Great Basin will continue to weaken over the next 24 hours.
723 PM EST Mon Jan 15 2018 Progressive pattern continues as large upper low spins over the Great Lakes region with deep and wide trough down through the Gulf of Mexico this evening. An upper-level closed low will drop southward over the Great Lakes region tonight and Tuesday, with a southwest flow aloft over Florida. Temperatures will be several degrees warmer, ranging in the mid 60s to mid 70s for highs.
624 PM EST Mon Jan 15 2018 A cold front passes through the region tonight through Tuesday. Low pressure passes north of the area tonight and into the Great Lakes and continues Northeastward during the day on Tuesday. The trailing cold front with this low slowly moves through the area tonight and during the day tomorrow, bringing a band of snow with it. With a positive tilted upper trof movement of the front will be relatively slow to push through. Slightly high amounts of 2 to 4 in the higher elevations of the Eastern mountains of WV. High pressure builds at the surface from the West through the period, gradually drying us out as the upper level trough and cold front slowly move out to the East.
High pressure will continue to dominate the region tonight, with clear skies and calm winds prevailing. Temperatures will drop below the freezing mark in most locales once again, with lows expected in the low 30s and upper 20s. Immediate coastal locations will likely remain above the freezing mark tonight.
Temperatures will start our quite cold, but recover most quickly on the higher elevation edges of the Red River Basin in eastern ND and northwest MN (treed areas most quickly), and linger below zero across much of the central Red River Valley.
After Tuesday, a dramatic warm-up will begin as a longwave trough moves into the western CONUS.
445 PM MST Mon Jan 15 2018 Updated Aviation Discussion High pressure will maintain mostly clear skies overnight into Tuesday.
In the low levels of the atmosphere, a large area of high pressure over the Northeastern United States will build southward down the Florida peninsula overnight. In the mid levels of the atmosphere, an Atlantic ridge of high pressure will extend across the Florida Straits tonight. In the upper levels of the atmosphere, a ridge of high pressure will be located east of the Bahamas overnight.
457 PM MST Mon Jan 15 2018 Updated and corrected portions of the 00Z Aviation discussion Clouds and light showers associated with the cold front moving along the Front Range is showing up well on visible satellite this afternoon on an otherwise mostly sunny day. A narrow ridge of high pressure will amplify overhead for Tuesday keeping conditions dry and sunny.
The only thing that could make the temperatures a bit warmer is the clouds.
Arctic cold front continues to plunge southward through central Texas, south of a College Station to Austin to Fredericksburg line at 04Z. Cold front will reach marine zones by 10Z and surge through coastal waters. MVFR ceilings are expected to develop during the overnight hours in advance of the arctic cold front with isolated to scattered light showers affecting the Coastal Bend. Precipitation expected to change to freezing rain at VCT by 15Z and 18Z for the other TAF sites, with a mixture of freezing rain and sleet possible in the afternoon.
High temperatures on Tuesday will range from the lower single digits above zero east to around 10 degrees west of the Missouri River.
A cold front will move southward across the area tonight and early Tuesday bringing a chance of light precipitation mainly from Fresno county northward.
A closed low at 500 mb was near the WI/MN border this morning, and recent water vapor imagery showed that dropping south/southeast. That feature will drop southeast, then east, then northeast tonight and Tuesday with heights rising in our area as a ridge to the west builds east. At the surface, a 1050 mb plus high pressure center was near the MT/ND border.
By the time precipitation develops, temperatures will likely be cool enough for a mixed winter bag of precipitation types (freezing rain, sleet, snow) transitioning primarily to snow, although amounts are expected to be light.
The much advertised arctic cold front has blasted through the area Today and is currently across southern Arkansas into north Texas. Additional light snow will be possible this evening and into the overnight hours across southeast Oklahoma into west-central Arkansas with forcing occurring behind the cold front.