Aikyam-Lab/Synoptic-Bench huggingface dataset:
335 AM PST Mon Nov 6 2017 A weak low pressure system over the subtropical eastern Pacific will spread mid and high level cloudiness across portions of Southern California through tonight with small chances for light precipitation.
An upper level trough remains over the region this morning producing some snow showers. It will be slowly exiting the region through the day and overnight as a ridge of high pressure builds in from the west. The high pressure will bring clearing skies overnight which will allow for good radiational cooling resulting in some very cold low temperatures Tuesday morning. The high pressure will develop a shallow inversion resulting in some freezing fog developing overnight. This will also trap a cold pool of air in the Lower Columbia Basin and along the East Slopes of the Washington Cascades keeping Tuesday high temperatures cool. Meanwhile, an increasing southerly wind ahead of an approaching weather system will bring some warmer air across the higher terrain of eastern Oregon on Tuesday.
/issued 327 AM CST Mon Nov 6 2017/ A cold front continues to move through the Mid-South this morning. An area of low pressure will develop along the front near Northeast Texas and move east. Rain associated with the low will begin to spread into Northeast Arkansas around noon and will continue to move east affecting areas along and north of I-40 during the afternoon hours. The low will push into South Central Kentucky by sunrise allowing the cold front to begin pushing back to the south. Rain from this low will spread into areas along and south of I-40 during the afternoon hours on Tuesday and will continue into Tuesday Night.
A weak cold front was pushing west which will pull low clouds and fog into the KLBB terminal area shortly. Once stratus erodes in the following hours, cool surface ridging lingering off the Caprock will remain largely unchanged and serve as a barrier to milder westerlies across the western South Plains. This should limit the wavy surface front's eastward progress and make for some challenging high temps, but the overarching theme from short term models is for cooler highs today over roughly all but our western 1/3 of counties. Stratus should re-emerge slowly late tonight, initially in the eastern Panhandle behind a robust cold front before expanding south through the South Plains Tue morning.
639 AM EST Mon Nov 6 2017 A cold front will continue to work through the region this morning. Cold front will continue to work through the region this morning. Thereafter, high pressure will build in with dry and cool conditions. There will be a reenforcement of the cooler air late in the week which will drop high to 10 degrees below normal. The high pressure system will move off to the east over the weekend.
Temperatures will probably be cooler than earlier forecasts so we brought them down slightly.
1007 AM EST Mon Nov 6 2017 Clouds and much colder temperatures can be expected today in the wake of a cold front. Mostly cloudy to cloud skies can be expected today in the post frontal airmass in the wake of a cold front. Thereafter, high pressure will build in with dry and cool conditions. There will be a reenforcement of the cooler air late in the week which will drop high to 10 degrees below normal. The high pressure system will move off to the east over the weekend.
The region will remain situated between strong high pressure centered over Mexico and strong low pressure well to the north. There should be a few light showers across the high terrain of eastern Arizona on Tuesday, but it looks like it will stay just outside of our CWA. A second weaker trough is set to track just to the south across northern Mexico.
Like yesterday, temperatures this morning are mainly in the lower 70s, some 15+ degrees above climatological normals. For the remainder of today, whatever fog develops expected to lift right after sunrise as the winds mix the boundary layer, leaving partly to mostly cloudy skies with afternoon temperatures in the lower to mid 80s, about 8-10 degrees above climatological normals. Not much change for Tuesday, as we remain in a predominate southerly flow at the surface with ridging aloft over the Gulf of Mexico.
628 AM EST Mon Nov 6 2017 Aviation Colder than normal temperatures will prevail all this week as high pressure from Canada dominates our weather.
1019 AM EST Mon Nov 6 2017 A cold front will push southeast across the area today.
Upper level trough will be slow to depart but ridging does return briefly for midweek with dry conditions.
41 North and central GA will remain under a flat ridge aloft through the short term. In the lower levels.
A slow-moving arctic low pressure system over the region has allowed periods of light snow to persist through the overnight hours and into this morning for many locations across the region. Model consensus indicates that this snowfall will gradually diminish from north to south throughout the day as the main trough axis slides through Montana.
A cold front will edge closer tonight and may trigger some light shwrs or DZ N which will work South during Tuesday.
433 AM MST Mon Nov 6 2017 Current surface shows high pressure across northern Montana into the eastern Dakotas. For today, positive tilt upper trof drops through the northern plains with reinforcing shot of cold air. Upper trof shifts south of the area tonight with snow ending.
Temperatures should climb into the lower/mid 90s across the western half of the area with upper 80s over the Victoria Crossroads and lower/mid 80s along the immediate coast. One last very warm day will occur Tuesday before the next cold front moves through South Texas. The mid level high over Mexico will gradually drift to the southwest as a cold front pushes through South Texas.
538 AM CST Mon Nov 6 2017 High pressure ridge over the Missouri River Valley in the Upper Midwest this morning building into the region. Rest of the week remains far cooler than recently, and slightly cooler than normal.
620 AM EST Mon Nov 6 2017 A cold front crosses today.
Scattered snow showers associated with an upper trough will continue today, mainly over the higher terrain. Skies will clear tonight as the trough moves to our east and high pressure builds in from the west. The high pressure ridge will move into the area on Tuesday for continued clear skies, light winds, and high temperatures near 10 degrees below normal.
High temps will reach the lower 80s along the east coast to mid 80s interior.
748 AM EST Mon Nov 6 2017 A cold front will push southeast across the area today.
624 AM EST Mon Nov 6 2017 Issued 620 AM EST Mon Nov 6 2017 High pressure will build into the Great Lakes for most of this week but temperatures will be cool with highs mainly in the 40s and lows in the upper 20s to lower 30s.
531 AM CST Mon Nov 6 2017 The cold front continues to sag south early this Mon morning. Today Through Tuesday Night The cold front continues to slowly drop south through central sections of the state early this Mon morning. along with cooler temps. The cold front will continue to drop south into SRN sections of the state by midday before stalling over SRN AR this afternoon. temps north of the front will remain generally in the low 50s to low 60s for much of the CWA.
958 AM EST Mon Nov 6 2017 A strong cold front will approach the area from the west late today, then pass slowly through the region late tonight and Tuesday where it will stall just south of the area. Several areas of low pressure will move east along the stalled boundary mid to late week producing cool unsettled weather conditions across Eastern North Carolina. High pressure is forecast to build over the area from the north over the weekend, but a weak trough of low pressure offshore could produce some light rain along the coast. Well above climo heights/thicknesses today with vals around 1390M supportive of warmer MAV/ECM MOS vals of low 80s for many locations across E NC. A cooler and wetter weather regime is expected across Eastern NC for much of this week.
This should help to mix out the lower clouds and result in all TAF sites improving to VFR conditions by mid to late morning. Like yesterday, temperatures this morning are mainly in the lower 70s, some 15+ degrees above climatological normals. For the remainder of today, whatever fog develops expected to lift right after sunrise as the winds mix the boundary layer, leaving partly to mostly cloudy skies with afternoon temperatures in the lower to mid 80s, about 8-10 degrees above climatological normals. Not much change for Tuesday, as we remain in a predominate southerly flow at the surface with ridging aloft over the Gulf of Mexico.
Some virga is upstream but the lower levels are too dry for any precip.
557 AM EST Mon Nov 6 2017 A cold front will push southeast across the area today.
938 AM EST Mon Nov 6 2017 A cold front will pass through this afternoon and then stall across the Carolinas on Tuesday. A series of low pressure systems will track along the stationary front.
High pressure aloft will briefly build over the region for a day or two of pleasant weather.
/issued 352 AM CST Mon Nov 6 2017/ A broad upper high pressure ridge centered over Mexico remains in control of our weather.
412 AM CST Mon Nov 6 2017 A few flurries out there under high pressure with GOES R nighttime microphysics imagery showing streamers off of some of the regions larger lakes which may locally enhance the flurries to steady light snow with little to no accumulation expected. A weak upper level short wave will slide through this afternoon and may increase the likelihood of PoPs, but it will be difficult to overcome the regional high pressure dome, so not too concerned about this. Zonal flow and high pressure continues through Tuesday. Relatively quiet and dry conditions will continue overnight ahead of an approaching cold front.
Aloft - A ridge above central Mexico dominates the Gulf of Mexico while a low between Andros Island and Cuba deamplifies as it tracks to the Windward Passage. Surface - High pressure sprawling over the Gulf of Mexico and eastern seaboard re-locates to along Latitude 30 North by late Tue. An inverted trough between the Bahamas and Fl slides across the southern part of the state as it slowly dissipates. The second exception is the bulk of the moisture will in the low levels and ample enough.
957 PM EST Mon Feb 5 2018 High pressure building into the area tonight will move off the coast Tuesday.
951 PM EST Mon Feb 5 2018 High pressure will extend across the region through Tuesday.
Upper level trough east of the area will continue to move east. Flat upper level ridge will move over the area tonight. A broad longwave trough over the Hudson Bay region and a dominating ridge over the eastern Pacific/western U.
The low cloud cover has been fairly stubborn today and stayed in place longer than anticipated, though it has begun to mix out more over the last couple of hours. This cloud cover has kept temps cooler than expected today, though we should still warm up a few more degrees. However, as it heads east late tonight and early tomorrow morning, soundings indicate some saturation aloft will be lost, so some of the snow may transition to light freezing drizzle or rain early tomorrow morning east of I-65.
Went ahead an retained the patchy freezing drizzle and snow flurries mention but narrowed the window to just after sunrise and removed mention off caprock where forecast soundings keep surface conditions too dry to support. Cloud cover will be tricky through the day Tuesday, but nudged towards the more agressive high res models and NAM keeping clouds around longer and thus keeping high temperatures only in the low to high 30s (perhaps some 40s in the far southwest zones).
We are going to have our coolest night in quite a while, with temperatures dipping into the lower to mid 30s from the Snake River Plain into the Baker Valley.
1015 PM EST Mon Feb 5 2018 High pressure will build in from the west tonight and slide offshore Tuesday. A cold front will move through midweek followed by high pressure late week. Another cold front will move into the region over the weekend.
Sfc flow will back over the next few hours as a weak cold front backdoors into the area. /issued 158 PM CST Mon Feb 5 2018/ In the upper levels an upper trough moving down out of the NW will cross the Great Basin early Tuesday and swing down across NM late in the day.
High pressure will prolong dry and mild weather across Northwest California over the next several days. A persistent high pressure ridge over the E Pacific will continue the unseasonable dry weather across the area over the next several days. The GFS is the deepest and farthest W with the trough, while the ECMWF is weaker and a bit farther E. An area of high pressure off the coast of Oregon and an inverted trough along the coast of California will continue to create a strong northerly pressure gradient over NW California waters.
Reinforcing cold front has entered northeast OK while expansive low cloudiness has slowed its erosion across far E OK / NW AR. Temp trends were adjusted tonight through tomorrow to reflect a cooler scenario with the widespread cloud cover expected and continued N-NE boundary layer winds. The northern periphery of this heavier precip band will need to be closely monitored as any further lack of warming through the day will raise freezing rain potential.
The cold air is lagging behind the wind shift ( temperatures are actually warmer behind the boundary!); however, the cold air will move southward into northern Oklahoma this evening and will progress southward tonight. There is some potential for freezing drizzle on the northwest edge of heavier precipitation. For example, BUFKIT soundings indicate there is a chance of some freezing drizzle near I-44 late afternoon/early evening. Therefore, expanded the rain/freezing rain mix south and east to the Red River to account for the potential for near-freezing temperatures persisting farther south and east than previously forecast.
611 PM EST Mon Feb 5 2018 A secondary cold front has pushed off the coast. High pressure will build over the local area tonight.
/issued 342 PM CST Mon Feb 5 2018/ High pressure will continue to slide east tonight with southerly flow advecting moisture northward into the forecast region. A cold front currently stretched across the Plains states will move southeast across the region on Tuesday with a colder airmass filtering into northern sections.
/issued 332 PM CST Mon Feb 5 2018/ Clouds were slow to erode today, especially across the Rolling Plains, where temperatures were a little slower to rebound from last night's cold front. Our next cold front was pushing into the northern TX Panhandle this afternoon and is poised to arrive into the CWA this evening. As our next cold front settles in overnight, so too, will a bit of low-level moisture. This will not be the drought-busting moisture any of us have been hoping for, and most likely precipitation will come in the form of drizzle/freezing drizzle.
924 PM EST Mon Feb 5 2018 High pressure will slide offshore Tuesday.
especially in West Tennessee where Paris and Union City are already near freezing. /issued 533 PM CST Mon Feb 5 2018/ High pressure will continue to slide east tonight with southerly flow advecting moisture northward into the forecast region. A cold front currently stretched across the Plains states will move southeast across the region on Tuesday with a colder airmass filtering into northern sections.
633 PM EST Mon Feb 5 2018 Some light snow will occur ahead of a weak cold front that will cross the area late tonight into Tuesday morning.
609 PM EST Mon Feb 5 2018 High pressure will build south of the area tonight into Tuesday.
Surface winds will initially be near 5 to 10 knots out of the south this evening but then become north to northeasterly after 06Z with the passage of a weak cold front overnight. On Tuesday, an upper trough axis will drop into the desert southwest. Ahead of this trough, we will see an increase in southwesterly flow aloft.
Instability will remain elevated as warm front should remain south of the cwa.
722 PM EST Mon Feb 5 2018 A secondary cold front has pushed off the coast. High pressure will build over the local area tonight.
617 PM EST Mon Feb 5 2018 High pressure building into the area tonight will move off the coast Tuesday.
Blocking ridge of high pressure remains in place over the eastern Pacific keeping the storm track well to the north of the region.
709 PM EST Mon Feb 5 2018 High pressure will build in from the west tonight and slide offshore Tuesday. A cold front will move through midweek followed by high pressure late week. Another cold front will move into the region over the weekend.
Breezy and slightly cooler weather will arrive Tuesday as a weak cold front passes through the Four Corners.
High pressure centered near the mid Atlantic coast nosed down into east central Florida this afternoon and we got noticeable drying. A rather straight-forward forecast as high pressure centered along the mid Atlantic coast pushes offshore.
515 PM EST Mon Feb 5 2018 High pressure will build south of the area tonight into Tuesday.
An area of low pressure will take shape over the Mississippi Valley Tuesday night, and will bring a significant snowfall to much of the region starting late Tuesday night.
Cold front recently swept southwest through the area with northeast wind gusts to 40 mph. Tuesday night, mid level qg subsidence will move across the region as the trough axis exits the state.
928 PM EST Mon Feb 5 2018 High pressure will slide offshore Tuesday.
432 PM MST Mon Feb 5 2018 00Z TAF CYCLE VFR conditions prevail and are forecast to persist, except at KTCC and possibly KLVS behind a backdoor cold front overnight. A short-duration LIFR freezing fog event may be the more likely scenario at KLVS early Tuesday morning, but would be a low probability event. Warm conditions prevail today ahead of a cold front, which will push into northeast New Mexico tonight and may result in patches of freezing fog between Raton and Clayton. The rest of the cold front will sweep southeast across the state Tuesday and result in windy conditions with some snow across the northern mountains and far northeast New Mexico.
515 PM MST Mon Feb 5 2018 Scattered snow showers have picked up with daytime heating today across northwestern Colorado in narrow bands of convection just ahead of an approaching trough. The trough advecting colder air into the region will pass northwest to southeast through eastern UT and western Colorado tonight and into Tuesday morning. As the trough passes through late tonight, a band of precipitation is expected to develop south of I-70 and as far south as the northern San Juans. With this trough's convective nature, brief whiteout conditions will be possible through Tuesday morning where heavier showers pass through. The atmosphere stabilizes Tuesday evening leaving cooler northwesterly flow in place.
556 PM CST Mon Feb 5 2018 Upper level trough over western Missouri into Minnesota is rapidly approaching, moving ESE toward central and northern IL. Snow is already spreading into a band from Burlington to La Salle as expected, while additional snow trailing southward from Burlington is poised to spread through most of central and even southeast Illinois this evening as the trough pushes eastward. The area south of I-70 could also see periods of freezing drizzle as pockets of shallower cloud depth lead to loss of ice crystal formation aloft.
906 PM EST Mon Feb 5 2018 High pressure will build south of the area tonight into Tuesday.
If the clouds hang longer, that will keep temps a little warmer than expected. A ridge of high pressure will then move into the region and bring cold yet sunny conditions along with it overnight into Tuesday.
High pressure over the eastern Pacific will continue to result in dry weather conditions across the region through the forecast period. Forecast models indicate the ridge of high pressure will remain in place and build slightly toward the coast. By the upcoming weekend, temperatures are forecast to cool by a few degrees as a mid/upper level trough slides down into the Pacific Northwest and then inland to our east. SFO Bridge Approach.
An upper trough is moving across the Great Lakes and Ohio Valley. This system has produced a boundary jet across the lower Mississippi and western Tennessee Valleys which is pulling moisture northeast. Chattanooga Airport, TN 34 53 46 57 / 10 30 80 100 Knoxville McGhee Tyson Airport, TN 30 48 42 54 / 0 30 80 90 Oak Ridge, TN 30 48 42 54 / 10 30 80 90 Tri Cities Airport, TN 26 45 39 51 / 0 20 70 90.
A cold front will move quickly south across Oklahoma and north Texas tonight. The cold air is lagging behind the wind shift ( temperatures are actually warmer behind the boundary!); however, the cold air will move southward into northern Oklahoma this evening and will progress southward tonight. There is some potential for freezing drizzle on the northwest edge of heavier precipitation. For example, BUFKIT soundings indicate there is a chance of some freezing drizzle near I-44 late afternoon/early evening. Therefore, expanded the rain/freezing rain mix south and east to the Red River to account for the potential for near-freezing temperatures persisting farther south and east than previously forecast.
Current surface observations show that colder air isn't all that far away with cold front pushing through Kansas attm. The cold front is expected to reach the KS/OK border by early evening then push southward with time. A weak warm nose and warm front should allow temperatures to rise into the upper 30s and low 40s across far eastern Oklahoma and northwest Arkansas Tuesday afternoon; however, the NAM has been favoring a colder solution with temperatures in this same area generally staying in the mid 30s. With a colder solution, light rain and drizzle spreading northward tomorrow will changeover to light freezing and/or sleet and freezing drizzle much more quickly than forecast.
Other than the cold, the main forecast concerns are some intermittent snow which has been sprouting up in some of the cold air advection regime - very reminiscent to lake effect snow bands, but more of a differential instability issue with the bright sky cover, cold temps, and flow around a weak area of low pressure. The upper low over Hudson Bay will continue to pull cold Arctic air into the northland. The GFS digs the upper trof into the Pacific northwest late in the week faster and deeper than the ECMWF, which results in a more Pacific flow. GFS is warmer than ECMWF in the warm up, and will generally side with the more conservative ECMWF. VFR through the forecast with high pressure in the neighborhood.
The low clouds and fog will spread north and reach KSJT by 09z. The low clouds will bring MVFR/IFR ceilings with light drizzle to the terminal beginning at 10z and lasting throughout the rest of the day. A cold front was moving into the northern Texas Panhandle this afternoon. The cold front will be moving into the Big Country Tuesday morning, and midday in the Concho Valley, and afternoon along I-10. Went cooler with highs in the upper 30s to lower 40s in the Big Country tomorrow. Added patchy drizzle in the Concho Valley and areas east and south tonight after midnight as a warm front temporarily moves north. There is a 20 to 40 percent chance of rain Tuesday as the cold front pushes the moist air associated with the warm front, back south.
Sfc flow will continue backing over the next few hours as a weak cold front backdoors into the area. /issued 158 PM CST Mon Feb 5 2018/ In the upper levels an upper trough moving down out of the NW will cross the Great Basin early Tuesday and swing down across NM late in the day.
Freezing Drizzle this Evening. Freezing drizzle will increase and persist over the Ozark Plateau into central Missouri with the passage of a front. Seeing some mPING reports of light freezing drizzle east of the KC Metro, but this looks to be very light falling out of high cloud bases. Main uncertainty is with the borderline thermo profiles for snow- sleet-freezing rain, and a degree or two either way will create a somewhat disproportionate change in precip type(s).