Aikyam-Lab/Synoptic-Bench huggingface dataset:
A cold front extends from this low, southwestward into the lower Mississippi Valley. The trough will swing through the Ohio and Tennessee Valleys during the evening hours, pushing the cold front through the area. High pressure will build across the region on Monday, with skies clearing fairly quickly during the morning hours. The airmass will not be too much different behind the cold front, however temperatures on Monday will still struggle to make it out of the upper 50s despite clear skies.
Warmer weather will occur Monday as the clouds thin.
145 PM CST Sun Nov 12 2017 Wx map shows cold front over OK/N TX this afternoon, with high pressure ridging from the East Coast to the Gulf Coast. The cold front will move through the region this evening and overnight, bringing slightly cooler and drier air over the area.
233 PM MST Sun Nov 12 2017 A generally quiet period of weather over the next 24-48 hours with high pressure in control.
As high pressure settles in tonight from the north, light winds are expected and this will set the stage for the potential for fog formation. As for temperatures, highs this afternoon will top off in the low to mid 50s, with lows tonight in the lower to middle 30s. High pressure will slide off to the east Monday with return flow and warm advection on its backside across the central Plains.
A cold front will approach during the overnight period with a few light showers or drizzle possible.
349 PM CST Sun Nov 12 2017 Not much change in the last 24 hours as persistent stratus lingers over much of the Northland under high pressure. There may be pockets of freezing drizzle out there, but have yet to receive any reports of it despite some indication on radar and a 4 SM HZ report at KINL. An 850 mb warm front begins to nose into the region, but the end result will be slightly warmer temperatures on Monday. Also, fog is a possibility tonight again as the slightly warmer air moves over the snow.
1224 PM EST Sun Nov 12 2017 An approaching cold front will cross the area late tonight into Monday morning.
For tonight, the models are in agreement that the low clouds currently located over northwest Wisconsin and northern Minnesota will move southeast into western Wisconsin. Low temperatures will be in the teens in central and north-central Wisconsin and in the lower and mid-20s across the remainder of the Upper Mississippi River Valley. On Monday, the clouds will gradually increase as a short wave trough approaches the region from the Northern Plains.
307 PM CST Sun Nov 12 2017 A cold front currently stretches from Little Rock, Arkansas to Union City, Tennessee. Behind the front, cooler temperatures will begin to filter into the Mid-South. Highs will range from the lower 50s to the lower 60s.
Dry conditions will persist Monday night in response to a flattening ridge of high pressure overhead.
High pressure aloft across the region will continue to shift east into Colorado today. An increasingly warm and dry southwest flow aloft behind the exiting high pressure will generate above normal temperatures across the region through Monday.
1225 PM EST Sun Nov 12 2017 High pressure will cross the region today then exit across the maritimes Monday.
1112 AM CST Sun Nov 12 2017 The cold front is finally showing signs of pushing through and visibility/ceilings have improved considerably. Despite the cold front passage, the addition of some sunshine should boost temperatures warmer than what we have had in the recent past with highs near 50 and some clearing means lows in the lower 30s, not dropping off too low as return flow already ensues.
317 PM CST Sun Nov 12 2017 Visible satellite is showing an extensive area of clouds covering the area as water vapor imagery is showing a mid level trough moving across Missouri and Illinois. Some patchy drizzle is be reported over the area ahead of the trough. This trough will move east of the area this evening, but the clouds will be slower the clear out.
1100 AM CST Sun Nov 12 2017 A cold front is beginning to push into Northeast Arkansas at this time.
210 PM CST Sun Nov 12 2017 The cold front has pushed well s of the Pecos River with widespread low clouds e of the mtns with some patches fog, see visible satellite imagery for a clear depiction. All areas are expected to see sunshine return Tue PM and temps will shoot up to above normal readings with patchy fog again possible Wed AM across parts of the PB ahead of a cold front. Another quick warm-up Thur with lee tough/thermal ridge. Much drier/winder Fri as a fast moving cold front is likely to re-enforce much drier air late Fri into Sat AM setting up cooler wx Sat PM-Sun PM.
Should drop into the teens in the snowcover area should occur but otherwise not a huge fall off tonight as warm advection gets going in the low levels. Warmer air moves in.
/issued 1100 AM CST Sun Nov 12 2017/ A cold front is beginning to push into Northeast Arkansas at this time.
/Today through Tonight/ Upper level wave approaching from the west will plow through the state by 18Z with upper level ridging building into the state this afternoon. The best forcing with this wave moves across central Iowa between the highway 20 and I80 corridors but quickly weakens and dives southeast between 15Z and 18Z. I think this drier air is negatively impacting precip along the highway 20 corridor and while I knocked dow qpf a little, it may not be enough. soundings show precip should mostly be rain but there may be a brief period of a rain/snow or freezing rain mix along the back edge of the precip where the colder air is pushing in. Tonight will be a cool night but as the high slips east, a southerly flow develops across the forecast area after 09Z.
248 PM MST Sun Nov 12 2017 An upper level ridge will be over the area through Monday while at the surface, a lee trough lies along the urban corridor. On Monday, with warmer overnight lows and warm advection moving in under the ridge, highs will likely be 10 to 20 degrees warmer over today's readings. Winds will be similar with the leeside trough remaining along the urban corridor.
General agreement exists among the models for continued southerly flow with dew points remaining in the lower 30s or creeping into mid 30s overnight. Temperature-wise, made little change to lows tonight, which reflect cooler west for clear skies to start and warmer east for higher winds. Kept highs in the mid 50s east of Hwy 83 where stratus is slower to lift through the day, which is closer to the cooler MET guidance.
1115 AM EST Sun Nov 12 2017 High pressure will move east today. A weak area of low pressure will pass south of New England Monday.
1122 AM EST Sun Nov 12 2017 Widespread cloud cover will persist throughout the day with an area of isentropic lift to the east and a weak cold front approaching from the west. Chattanooga Airport, TN 53 44 62 39 / 20 10 0 0 Knoxville McGhee Tyson Airport, TN 53 46 56 36 / 20 20 10 0 Oak Ridge, TN 53 45 57 37 / 20 30 10 0 Tri Cities Airport, TN 51 42 53 33 / 20 40 20 0.
Latest visible satellite imagery shows the back edge of the low cloud shield just now advancing east past Des Moines, Iowa. With low temperatures bottoming out in the upper 20s and lower 30s, there could potentially be a few slick patches on sidewalks and bridges/overpasses for the Monday morning commute.
Enhancement of precip occurred as a jet associated with an upper level trough has moved into the region. The rain shield should gradually retreat southward as the upper trough brings a cold front across the area and into the Gulf of Mexico tonight. A slow moving upper trough to the north this week means little change expected in the local weather. Highs will be creeping back up into the mid/upper 70s by later this week as the upper trough to the east moves out into the Atlantic Ocean. Attm, GFS and ECMWF are not quite in agreement on how amplified the the trough will be.
At the surface, a cold front stretches from Southern Indiana back to the southwest into Eastern Texas. PW values will increase ahead of the cold front into the 0. The deepest saturation will be across SW Virginia and NE Tennesse and this is where the highest PoPs are featured. With this low level saturation, there could also be some patchy fog late tonight into early Monday morning. Despite the mostly sunny skies, northerly winds will advect in cooler air and high temperatures will generally be in the 50s for most valley locations.
1011 AM MST Sun Nov 12 2017 Current surface map places high pressure across the eastern Dakotas. Warm and dry conditions expected early this week with flat upper ridge overhead.
1211 PM EST Sun Nov 12 2017 A good deal of clouds will be over the area today but no precipitation is expected as high pressure persists over the area today and tonight. A low pressure system will pass to our south on Monday. No precipitation is expected with high pressure over the area and high temperatures will generally be in the 30s.
227 PM EST Sun Nov 12 2017 Weak low pressure and a cold front will approach from the west tonight and cross Monday.
1215 PM EST Sun Nov 12 2017 High pressure to the north will gradually weaken and slide offshore today. A weak coastal trough and low pressure area will develop Sunday Night through Monday, with a cold front moving through the area Monday.
As the high shifts off to the east southeast Monday, return flow will setup across the state. Still expected to see cooler temperatures tonight with the clear skies and waa not kicking in until late tonight. Very low level moisture to stick around especially in areas where the low clouds hung around this afternoon, thus expect near saturation tonight. /Monday night through Sunday/ The large area of high pressure will continue to move away from Iowa over the eastern US/Canada Monday night.
/7/ Today through Tonight: Latest Rap and Satellite imagery showed westerly flow aloft with low to upper ridging over the Lower Mississippi Valley. Readings prior to dawn were from the upper 40s to the lower 50s. Highs today will be around normal from the middle 60s north to the lower 70s southwest. Lows for tonight continue to be around normal from the middle 40s north to the lower 50s south.
Went with the warmer MAV guidance for overnight lows tonight but this may still be too cool depending on cloud cover. Model soundings indicate that the low level moisture will be deepest over far south central Kansas by Monday morning. Elsewhere, stratus will be slowly eroding from the west as the low level flow takes on a downslope component. This will also result in a decent temperature gradient across southwest Kansas with highs ranging from the mid 50s along the Highway 183-281 corridor to near 70 along the Colorado border.
319 AM CST Wed Dec 20 2017 As the upper low moves off to the east, flow will become more zonal ahead of the trough over the west coast. Timing is still on track for the first cold front to move through as a dry front Thursday evening. Models have become less consistent from previous runs on how they are handling the upper low as it moves across the Rockies. Previous runs had an open trough with little precipitation. The GFS keeps a closed low before opening up to a wave over New Mexico and has less precip ahead of the trough.
Lows overnight were bumped up a few degrees over the coast locations as recent guidance has come in a little bit warmer.
Light wind and slow expansion of the low clouds on satellite indicate the low ceilings will likely remain around through the early morning before going VFR Wednesday morning before sunrise. /issued 358 PM CST Tue Dec 19 2017/ Upper low center was passing overhead this afternoon, with modest instability and attempt by the cumulus field to build mainly across the Rolling Plains. A weak surface cold front may dip southward into the area overnight. Solutions favor the next cold front to spread southward Thursday night - some difference yet in timing - we favor faster WRF/NAM and ECMWF solutions.
341 AM CST Wed Dec 20 2017 Broad upper low over Washington this morning is the main source of sensible weather this period.
200 AM EST Wed Dec 20 2017 Low pressure passes to the south today.
921 PM MST Tue Dec 19 2017 We are sending out a quick update to upgrade the high wind watch to a high wind warning for Arlington. Mainly clear across the CWA this afternoon and this will continue this evening before clouds begin increasing later tonight ahead of an upper trough now impinging along the west coast. Continued mild Weds with some gusty winds in a favorable swly flow ahead of the upper trough. Changes begin Weds night with the passage of a strong cold front while the upper trough closes off an upper low over Utah. Still looking like a general 2-5 inches over the plains with 8-11 over the higher peaks.
A cold front has moved through the western part of the forecast area and is currently passing over the Blue Mountains. The upper level trough will be passing over the region tomorrow for some continued snow showers mainly over the mountains. The cold front has passed through all of the terminals. Sporadic rain and snow showers will be possible via instability and upslope mechanisms across central Oregon and near the Blue Mountains through early Wednesday afternoon as cold air aloft in the base of the trough currently coming onshore overspreads the area and weak northerly upslope winds develop behind the departing front.
With a significant number of hours yet before the high clouds provide appreciable insulation. Between 6 pm and 9 pm Wednesday the cold front associated with the strong Pacific storm system will reach the eastern Uinta mountains of NE Utah. Believe the lower elevations of SW CO and SE UT with receive light snow amounts but not quite enough to justify an advisory.
Mid- level ridging over the Intermountain West will keep conditions dry across the Northland except for small chances of lake effect snow along the Gogebic Range of northern Iron county. More clouds would keep temperatures a bit warmer, which is the direction I'm leaning. A deepening mid-level trough will develop over the Pacific Northwest tonight. The snow gets an assist from a positively tilted trof moving into northern Minnesota by 12Z Thursday. Ridging arrives elsewhere on Thursday into Thursday night ending the snow event. Some lake effect is still possible through Thursday night along the higher terrain of northwest Wisconsin, but dry air will be playing a role.
One more mild day is forecast for all the area on Wed, with strengthening southwest flow as upper trough swings southeastward into UT by Wed evening. Max temps will push back into the 60s over the plains as mid level thermal ridge develops east of the mountains, while mild 30s/40s persist over higher elevations.
As high pressure builds into the region on Wednesday, the pressure gradient will relax and the flow will remain steady and slowly decrease with time. Lake induced clouds behind the passing cold front are having a difficult time surviving the increased sub-cloud depth off the higher terrain of northern Lower Michigan. Morning lows in the low to mid 20s may be accompanied by a few lake effect cloud streamers, but rapidly diminishing moisture quality will limit potential.
The core upper low has another cluster of Thunderstorms moving along the Red river of OK/TX and may affect portions of I-30 overnight.
Will consider expiring the high wind warning and wind advisory later this evening once that front passes.
H100-H70 anticyclone centered over the FL Straits is keeping the sfc/low lvl pgrad quite weak, resulting winds blo 5KTS thru the lyr. The center of the ridge will drift into the central Bahamas thru daybreak Thu as a weak frontal boundary over the Deep South/Lwr MS Valley presses into the Panhandle/north Peninsula. Position of the ridge axis will maintain a light but steady S/SW breeze thru the day, veering to W/SW overnight. Will continue to be dominated by presence of an upper level high pressure area centered south of FL. The feature will provide warmer than normal temperatures along with mainly stable conditions and morning fog.
The dynamics starts to weaken this afternoon, but given weakening upper trough will move across the region, will maintain high chance/likely PoPs this afternoon.
351 AM EST Wed Dec 20 2017 A ridge of high pressure will build across the region today.
1235 AM EST Wed Dec 20 2017 A cold front will move southeast across the area this evening then high pressure will move east across the region Wednesday into Thursday.
The weak cold advection that occurred today will slowly end overnight into Wednesday as surface ridging slides across the state.
Cold front has pushed into the Panhandle this evening. Heaviest snowfall is expected over the higher terrain of the Central Panhandle Mountains. The upper level low will swing across the region Wednesday morning. /SVH 06z TAFS: A moist cold front is pushing into the ID Panhandle late this evening. Drier air will push through the Okanogan Valley and clear the low clouds out of KGEG, KSFF and KCOE through the afternoon on Wednesday.
Warmer Wednesday before a Pacific weather system sweeps into the Four Corners region on Thursday. This system will bring gusty winds and much cooler temperatures but little chance of precipitation.
952 PM MST Tue Dec 19 2017 Upper ridging covers the northwestern CONUS, and a low pressure system is pushing into the Pacific Northwest. The upper low will move onshore tonight. As the 850 mb low crosses the Rockies, a warm front will begin pushing into the northern plains. Temperatures Wednesday will depend on the track of the low and where the warm front sets up, but they are expected to range from the 30s across northwestern SD to near 60 across southwestern SD. Models continue to show the track of the upper low through the Four Corners region, weakening as it transitions eastward.
Narrow band of showers and thunderstorms moving across the forecast area at this time aligned along an eastward advancing cold front.
Currently, A short wave/upper level disturbance is moving out of the Southern Plains and this is pushing a weak cold front through east Texas with a band of showers with embedded thunderstorms. The weak cold front and band of showers is still expected to reach KAEX-KBPT around 20/09Z, KLCH around 20/10Z, and KLFT-KARA between 20/12-13Z.
256 AM CST Wed Dec 20 2017 Water vapor imagery was depicting near zonal flow prevailing over the northern tier of the CONUS with an upstream closed low moving ashore into the Pacific NW. Thursday morning, light freezing drizzle will develop and expand southward over the northern CWA. For this afternoon and evening, models are in agreement the southward extent of the cold air advection push will be limited with the dividing between light freezing drizzle northwest/light drizzle southeast will run roughly from about Shelby Co IA to Jefferson Co NE.
1141 PM EST Tue Dec 19 2017 A cold front will sweep east through the region this evening and will be followed by a secondary front on Wednesday. High pressure will build in from the west Wednesday afternoon through Thursday. High pressure will crest over the region Thursday night.
105 AM EST Wed Dec 20 2017 A cold front will move southward through the Ohio Valley tonight, with cooler conditions expected for Wednesday.
Heading into Thu ngt, clouds and rain chances wl return to much of the area as a new low pressure sys/cold front apch from the W.
1052 PM CST Tue Dec 19 2017 Low pressure will continue to advance across the state through the night. Did shift the highest QPF axis south some with the most significant rain totals greater than 1 inch anticipated across central/southern AR through tonight.
These warmer temperatures will be the result of our winds returning out of the southwest. On Thursday, a cold front is expected to drop into the Panhandles.
342 AM CST Wed Dec 20 2017 (Today and Tonight) Quieter, sunnier, and warmer weather expected today. Dry, zonal flow aloft will replace the upper level low that moved across the area yesterday. Farther west, an upper level trough will dig south into the intermountain west. This will cause increasing southwesterly flow across the Rocky Mountains, and lee troughing along the eastern Rockies.
439 AM EST Wed Dec 20 2017 High pressure building into the Ohio Valley from the northwest will keep any rain south of the area today. Southerly winds will pick back up late Thursday, ahead of the next low pressure system ejecting northeast into the area from the lower midwest.
345 AM CST Wed Dec 20 2017 As of 9Z, an area of low pressure is located over northeast Wyoming with east to southeasterly flow over a good portion of this CWA. The period starts off with an upper level trough exiting to the east, with another beginning to dig over the Northern Plains. By the middle of the weekend, this trough will have dug all the way to the Gulf of Mexico and will encompass the central and eastern part of the country. Northwest flow will be dominant over the region until ridging begins to build at the very tail end of the period.
1054 PM MST Tue Dec 19 2017 Zonal flow aloft/subtle ridging will persist through Wednesday. At the surface, a cold front has stalled across the front range and will return as a warm front tonight and dissipate.
Deep layered ridging remains entrenched across the area, keeping warm and dry air aloft. However, patches of stratocumulus are working their way across the Lower and Middle Keys. Forecast - The nearby high pressure system will settle a bit further south and elongate eastwards. Deep layered ridging will remain firmly in place keeping rain chances out. A mid latitude trough will amplify as it crosses into the eastern United States through the weekend.
Regardless, forecast time-height sections indicate the low level moisture diminishing by late morning with just scattered cu expected through much of the day. The subtropical ridge is anchored in the Atlantic and ridging into the northern gulf coast this morning which is providing the typical warm and moist onshore flow. A cold front has stalled from North Texas into Arkansas and then into the Ohio Valley. In the mid and upper lvls over the local area ridging is in place, but the ridge is centered to the east. The upper ridge is expected to break down late in the coming week which will allow for higher rain chances. High pressure over the region will keep winds light and onshore.
A weak mid level trough moves across southern Wisconsin this afternoon. The stronger 250 mb winds at the base of the trough will push across northern Wisconsin tonight. Appears the timing of the low level trough with the better instability will be across the southeast CWA during the afternoon and evening hours so will have some chance POPS going for this.
to the north of a mid- level subtropical ridge extending from northern Mexico east- southeastward across south TX, the northern Gulf and FL peninsula. Near term model guidance suggests that deep-layer ascent associated with the northern stream trough will be very weak at this latitude.
Most likely scenario is that redevelopment with daytime heating will take place later today as the trof/weak cold front push sewd.
A weak upper disturbance will pass through the region today in the wake of a weak cold front. High pressure will then build in behind this disturbance and bring a brief break of dry weather to the area tonight into Sunday. High pressure over the Central Plains is expected to build across Central Indiana this afternoon. Surface analysis shows a trough exiting central indiana. Meanwhile water vapor imagery shows subsidence in the wake of the trough across NRN Illinois building southeast. Given the plentiful sunshine expected today trended highs slightly warmer than the previous forecast. High pressure will bring a brief break of quiet weather tonight into Sunday, but a weak frontal zone will sag toward the region Sunday night and remain through the remainder of the short term and beyond.