Aikyam-Lab/Synoptic-Bench huggingface dataset:
824 PM EDT Mon Oct 2 2017 Dry high pressure will dominate the weather pattern through into the weekend. As of 8pm: Dry Synoptic pattern will continue as 500mb ridge strengthens slightly on Tuesday. Temperatures will continue a warming trend with Tuesday morning lows and afternoon highs a couple degrees warmer than Monday, close to seasonal normal.
735 PM EDT Mon Oct 2 2017 High pressure extending into the area from the northeast will shift slowly to the east over the next few days. Surface ridging extending into the forecast area from the north along with upper ridging will dominate through tonight. An upper level ridge will remain rather strong and centered just west of the area.
The main impacts for the short term will be freezing temperatures in the Scott Valley tonight as well as widespread areas of patchy frost for most of the West Side Valleys in southern Oregon and northern California. Additionally, breezy winds along ridgetops in the Cascades and Coastal Mountains are expected for the remainder of tonight into tomorrow. Additionally, the Scott Valley in California could see temperatures dip below freezing for a few hours. If either does not occur, the temperatures will not drop; and we will have neither the freezing temperatures, nor will we have frost. Beyond tomorrow, a warmer and drier trend will occur with clearer skies, and warming temperatures as we get set up under a high pressure system in blocking pattern. The models suggest the thermal trough will weaken some tonight resulting in decreasing north winds.
728 PM EDT Mon Oct 2 2017 High pressure centered over Southern New England will bring cool nights and mild afternoons tonight through Tuesday night.
A cold front will move across the northern TAF sites late Tuesday morning into the afternoon hours.
Strong high pressure will remain to our north, with breezy east to northeast winds holding through much of the week.
914 PM EDT Mon Oct 2 2017 High pressure will maintain dry and warm weather through the middle of the week. Another quiet night is in progress with upper ridging firmly in place. Cirrus spilling over the ridge will add only a very minor hindrance to radiational cooling conditions overnight. Higher dewpoints will mean overall warmer readings than the past couple of nights, but a decent valley/ridge split remains likely with overall low temperatures on the cooler side of guidance.
Forecast highs were nudged a bit cooler based on ob trends, with further adjustments possible pending tenacity of low clouds. The entire mass associated with an upper trough centered over western Oklahoma will continue to push fairly quickly off to the east with rain coming to an end across southeast Texas and southwest Louisiana by mid to late morning and acadiana by early afternoon. The front is progged to stall perhaps a hundred miles or so offshore later this afternoon and will quickly lift back to the north as a warm front by early Monday providing another round of widespread showers and likely a few more thunderstorms as convection will have a little more energy to work with.
Small area of drizzle visible at the lowest returns nearest KTLX this morning.
Temperatures are below freezing in a few locations and there have been a few reports of sleet mixing in with the rain. Chattanooga Airport, TN 44 40 60 48 / 80 40 10 20 Knoxville McGhee Tyson Airport, TN 45 39 59 44 / 80 30 10 10 Oak Ridge, TN 44 38 59 44 / 80 30 10 10 Tri Cities Airport, TN 46 36 57 39 / 70 30 10 10.
The entire mass associated with an upper trough centered over western Oklahoma will continue to push fairly quickly off to the east with rain coming to an end across southeast Texas and southwest Louisiana by mid to late morning and acadiana by early afternoon. The front is progged to stall perhaps a hundred miles or so offshore later this afternoon and will quickly lift back to the north as a warm front by early Monday providing another round of widespread showers and likely a few more thunderstorms as convection will have a little more energy to work with.
415 AM MST Sun Dec 17 2017 Deep low-level saturation and moist upslope flow is supporting fog and patchy freezing drizzle, along with areas of light snow along/ east of the Laramie Range this AM. Conditions improving through the day w/sfc flow becoming westerly in response to a passing trough axis.
1004 AM EST Sun Dec 17 2017 High pressure will build across the region today.
/issued 254 AM EST Sun Dec 17 2017/ High pressure, centered to the north, is forecast to maintain quiet weather conditions through the beginning of the week, under an easterly flow. The high then is progged to slide to the southeast, setting up almost directly over South Florida. There is also a 500mb ridge centered just to the south of the Florida peninsula. This will allow for warmer temperatures across the CWA for the entire forecast period.
Mid/Upper level trough over the ARKLATEX region on recent satellite imagery is moving slowly northeast this morning toward the lower OH Valley region. As weakening low pressure moves across southern IN then off to the east, low clouds and some light rain/drizzle should remain from cooler air circulating around the backside of the low. Would expect the possibility of some dense fog especially across urban areas where the wet comparatively warmer ground is covered by the cooler air on the backside of the surface system/trough in low levels.
929 AM EST Sun Dec 17 2017 A weak backdoor frontal boundary will hover near the area the remainder of the day, lifting northward as a warm front tonight into Monday.
621 AM CST Sun Dec 17 2017 Weak high pressure remains over the area this morning. A weak upper level trough tracking across the southern Prairie Provinces of Canada this morning will give way to upper level ridging this afternoon. Generally mild conditions tonight ahead of the cold front with overnight lows in the 20s.
948 AM EST Sun Dec 17 2017 High pressure will continue to remain over the Southeastern United States for rest of today into tonight keeping the weather dry along with an easterly wind flow. /issued 254 AM EST Sun Dec 17 2017/ High pressure, centered to the north, is forecast to maintain quiet weather conditions through the beginning of the week, under an easterly flow. The high then is progged to slide to the southeast, setting up almost directly over South Florida. There is also a 500mb ridge centered just to the south of the Florida peninsula. This will allow for warmer temperatures across the CWA for the entire forecast period.
640 AM EST Sun Dec 17 2017 High pressure will build across the region today.
The coverage is not continuous, but low enough to hoist a dense fog advisory for the morning hours, as the fog should linger trough mid morning before dissipating or exiting east. Will be stuck with plenty of clouds today, that will slide southeast as the day goes on as the 500mb trough stretching from Manitoba through eastern MT/WY and down through northwestern Mexico slides east. This feature will be over eastern ND and western SD by mid day, with clouds beginning to exit east as the trough to our eastern counties by 00Z Monday, and to our southeast by 03Z.
415 AM MST Sun Dec 17 2017 Upper trough continues to cross the western CONUS into the northern plains. with strong upper ridging behind it over the Pac NW. Drier air will push in behind the trough axis as it crosses the CWA with snow ending by mid to late morning. Low amplitude ridging across the western and central CONUS will take over, with warm air advection beginning late today into tonight. Dry weather is expected through midweek, with warmer temperatures.
High pressure will bring dry weather through Monday.
The departure of the trough this morning left clearing skies through tonight. Moisture riding along the ridge will bring the potential for some shower activity to Baker County OR and into the West Central and Boise Mountains of Idaho this evening, which will continue through at least Monday afternoon. Cold temperatures this morning will set the stage for cooler temperatures today, with warming conditions anticipated on Monday.
Fog across the region early this morning should clear shortly after daybreak, making way to warmer and drier conditions today. Another upper level low can be seen via satellite imagery already positioned over the Baja Peninsula. A coastal trough is expected to develop tonight, bringing isolated to scattered showers. Monday the coastal trough will strengthen, and combined with increasing moisture and the approaching upper disturbance, anticipate more scattered showers and an isolated thunderstorm possible through the day on Monday. Lows tonight will be warmer, staying in the 50s.
Northerly winds will decrease later this afternoon as the upper ridge builds over the region and surface pressure gradients relax.
344 AM MST Sun Dec 17 2017 Upper trough continues to cross the western CONUS into the northern plains. with strong upper ridging behind it over the Pac NW. Drier air will push in behind the trough axis as it crosses the CWA with snow ending by mid to late morning. Low amplitude ridging across the western and central CONUS will take over, with warm air advection beginning late today into tonight. Dry weather is expected through midweek, with warmer temperatures.
Although it is not currently forecast, the chance is not zero that the low clouds could erode late afternoon and into the evening from the southwest as moisture aloft diminishes, and if this occurs, fog would likely develop.
Eventually, the low level flow will veer to more of a westerly direction, warming and drying the bulk of this low level moist layer, but it is highly uncertain how quickly this will occur. Although it is not currently forecast, the chance is not zero that the low clouds could erode late afternoon and into the evening from the southwest as moisture aloft diminishes, and if this occurs, fog would likely develop.
Large mid level ridge aloft was noted just offshore of the southeast U. Upstream upper level trough noted across the Rockies and portions of Mexico and Texas. with convection across the Lower MS valley area. with temps at the sfc cooler than at 10 Kft due to warm advection aloft ahead of upper trough. Still expecting highs in the lower to mid 70s across most of NE FL with the coastal areas coolest due to onshore as the high moves southeast today. Thus somewhat cooler highs in southeast GA today. Weak warm front over FL not clearly defined but estimated to be over central FL just south of Tampa. Model blend in agreement of low chance of a couple of light showers along or just north of the warm front from about I-10 northward into parts of southeast GA.
628 AM EST Sun Dec 17 2017 High pressure will shift off the Southeast Coast today. A subtropical ridge will continue to extend into the Southeastern states today promoting zonal flow aloft. At the surface, high pressure will be centered offshore which will promote southerly flow.
340 AM MST Sun Dec 17 2017 Areas of light freezing drizzle had developed pretty much as expected. Fortunately surface temps haven't dropped much below 30F so roads temps are holding just above freezing so far. We could still see icy bridges and overpasses develop where freezing drizzle is more pronounced. Thicker fog is mainly confined to the higher terrain where cloud deck is intersecting with the ground, but some light fog on the lower elevations of the plains as well. The low clouds, fog, and drizzle should all be lifting later this morning into early afternoon as upslope component ceases. in the lower 40s on the plains. Flow aloft over the northern Colorado will be generally weak and westerly as a cut-off low meanders over the desert southwest.
626 AM EST Sun Dec 17 2017 High pressure will build across the region today and move east tonight. A weak area of low pressure will cross the region Monday. previous discussion High pressure will build across the region today with abundant sunshine and continued below normal temperatures. Afternoon highs today will range from the low to mid teens north and low to mid 20s central and down east. High pressure will continue to build across the region tonight. Of these model runs, we prefer the 00z CanGem attm, with a more srn track of the low from Srn QB on Fri into Nrn Washington county by Sat aftn.
High pressure off of the Carolina coast will drift southeast with east-west ridging setting up over north FL.
320 AM MST Sun Dec 17 2017 Eastern Utah and western Colorado lay between a closed low over the state of Sonora in northern Mexico and the open wave trough over the northern Rockies early this morning. The trough to the north will drift eastward during the day while the low remains relatively stationary. In fact, dry weather will continue tonight and Monday as the low over northern Mexico remains too far south to impact the region, and moisture in the northern stream also remains well removed from the region.
858 AM EST Sun Dec 17 2017 High pressure will continue to control the weather across the area today. High pressure north of the region today will setup a southeast flow across the waters through Monday with a shift to onshore near the coast with the sea breeze during each afternoon. This area of high pressure will shift eastward a bit, but continue to ridge across Florida through midweek, with winds gradually shifting from southeast to southwest.
with afternoon highs mainly in the lower to middle 40s.
Look for this to scatter out along w/ some breaks in the low cloudiness toward late morning. A warm front is expected to push northward toward the coast Monday morning. Expect the typical dreary wx associated with these fronts: rain, fog, drizzle, some embedded tstms, etc to accompany the warm front.
Regional radars show widespread rain showers across the lower Mississippi Valley region, with all of that activity pushing off to the northeast. However, this system will be moving fast and weaken quite a bit by the time it arrives to the lower Ohio Valley, and some areas across northern KY and southern IN may not even see measurable precipitation today.
515 AM CST Sun Dec 17 2017 Forecast appears to be on track at this hour, with temperatures holding steady in the low 30s. Temperatures will gradually warm into the mid to upper 30s across the southern forecast area, but further north, look to mainly hold steady in the low 30s.
A cold front moving through the Panhandle should help to clear out low clouds with winds shifting to the northwest around 14Z.
High pressure then builds in for the middle of the week with sunshine and above normal temperatures.
However, prior to any precipitation arriving, temperatures should safely rise above freezing and likewise should see quite an uptick in dewpoints as well.
410 AM CST Sun Dec 17 2017 (Today and Tonight) An upper level low will remain across northern Mexico/southern Arizona today and tonight, with southwest flow across West Central Texas.
/issued 410 AM CST Sun Dec 17 2017/ (Today and Tonight) An upper level low will remain across northern Mexico/southern Arizona today and tonight, with southwest flow across West Central Texas.
The other forecast concern in the near-term is the threat for drizzle or freezing drizzle across western and west-central Nebraska. High temperatures today will be much cooler than previous days, largely thanks to persistent cloud cover. Westerly winds at the surface and aloft will make Monday significantly warmer than today, with high temperatures in the mid 50s.
320 AM PST Sun Dec 17 2017 High pressure will build in over the Great Basin over the next several days with offshore flow and dry conditions over Central California.
Rain should continue to quickly lift northeast this morning as the upper low lifts out. Models continue to agree on another closed low developing over Sonora Mexico by this evening. 00z runs of the GFS and ECMWF have come in about 6 to 12 hours slower with the strong cold front on Thu.
532 AM MST Sun Dec 17 2017 Deep low-level saturation and moist upslope flow is supporting fog and patchy freezing drizzle, along with areas of light snow along/ east of the Laramie Range this AM. Conditions improving through the day w/sfc flow becoming westerly in response to a passing trough axis.
750 PM EDT Wed Aug 30 2017 A weak cold front will move across the area early Thursday, but little if any rain is expected.
These cooler and drier conditions will continue, as north and northeast winds around Harvey continue to pump the unusual August air mass into the area. With dewpoints in the low to mid 50s this afternoon, overnight lows tonight dropping well into the 50s in many areas will remain possible.
Tropical Storm Harvey will slowly lift northeastward from southern Louisiana into the lower Mississippi Valley. A warm front over southern Georgia will move into the central Midlands by midday Thursday and provide a focus for showers and thunderstorms. moderate instability and warm advection/isentropic lift/mid level short wave moving over ridge should result in scattered to numerous showers and thunderstorms near the front through the afternoon.
Deep layer dry air continues over the region between departing TS Harvey and strong mid level ridge over the Desert SW and Rockies. One more night of fairly comfortable temperatures with lower than normal dewpoints then near normal highs on Thursday with some of the higher clouds possible thickening up in the afternoon.
The remnants of Harvey continue to track towards the mid state, and models have not only sped up the low, but tracked it just a little further east. Forecasted amounts were adjusted up slightly since the higher precip edged its way more into our area, so expecting the highest amounts to be around 7 inches north of I-40 and west of I-65. As the upper low gets closer to the region, chances for showers and storms will again increase Thursday afternoon in the west.
Do not expect as much in the way of fog tonight/early Thursday morning due to slightly warmer low temperatures expected across the area.
515 PM MDT Wed Aug 30 2017 The upper ridge covers the western half of the country, and an upper trough is pushing into the Pacific Northwest.
As of 19z Wednesday afternoon, upper level ridge axis is centered over the four corners region. At the surface, the ridge axis is positioned from central Kansas into Wisconsin. Upper level ridge axis will slowly progress eastward into the northern Plains tomorrow afternoon, ahead of the next northern stream trough. Low level ridging becomes centered over the area with perhaps some cirrus late in the night and SREF probabilities are higher than tonight.
20z water vapor imagery shows an upper low spinning near the Hudson Bay.
943 PM EDT Wed Aug 30 2017 Weak high pressure will extend across the area into tonight. A cold front will drop south across the region on Thursday and then stall just south of the Ohio River.
A cold front will move through from northwest to southeast late tonight through around midday tomorrow, ending the threat of precipitation and bringing a brief respite from the recent heat.
851 PM EDT Wed Aug 30 2017 A weak ridge of high pressure will slide across Pennsylvania tonight. A strong cold front will push south through the region Thursday.
The front will get hung up across southwestern MN, keeping dew points higher there tomorrow but the remainder of the area will see temperatures in the low 70s and dewpoints in the mid 40 to low 50s.
An upper level trough is moving across the western Great Lakes this hour dragging a cold front into northern WI and central MN. High pressure is settled over our area as we are sandwiched between the cold front to the north and Harvey to the south. Highs tomorrow will be a few to several degrees cooler than today, reflecting the infiltration of Canadian air well depicted by 850 mb temp progs.
Ahead of the low, strong southeasterly winds are ongoing across much of easternmost Montana.
1035 PM MDT Wed Aug 30 2017 The upper ridge covers the western half of the country, and an upper trough is pushing into the Pacific Northwest.
650 PM CDT Wed Aug 30 2017 High pressure will shift from Ontario into the Lake Superior region tonight into Thursday. Overnight lows will likely be in the lower to upper 40s for most areas.
Skies have partially cleared but expect a few clouds to linger overnight as the ridge has dirtied up a bit with more mid/upper level moisture. Models are still showing the upper ridge over the CWA tonight and Thursday. There is some CAPE over the mountains, foothills and Palmer ridge by Thursday afternoon, with nothing over the eastern plains. For pops, "chance"s in the high country, "slight chance"s to nothing over the plains both this evening and again Thursday in the afternoon. Weak upper level trof will move across Colorado Thursday night with weak QG ascent over Eastern Colorado.
1149 PM EDT Wed Aug 30 2017 Aviation Cloudiness and much cooler air will spread south across the area overnight with some sprinkles possible.
High pressure over NE MB will sink SE into wrn Ont tonight, shifting winds to the east and eventually SE by sunrise. Winds to gradually shift from northeast to southeast overnight into Thursday morning as high pressure moves over the western Great Lakes. Breezy conditions will develop in the afternoon along and west of the valley in the return flow as temps rise into the low 80s with cooler values of 70s in the east.
913 PM EDT Wed Aug 30 2017 A deep ridge centered to our east brought a drier and more stable airmass to the area, precluding deep convection from forming this afternoon. The western flank of the ridge will remain overhead tonight, keeping skies mostly clear and PoPs below mentionable levels (less than 10%). High pressure building off the Mid-Atlantic coast will shift farther offshore, but ridge axis will extend across central Florida into tomorrow.
Northerly winds tomorrow will be much lighter than we have seen in quite some time as high temperatures remain below normal in the lower to mid 90s.
545 PM MDT Wed Aug 30 2017 A trough is moving onshore the Pacific NW today originating from a closed low over Alaska. This weak upper level trough will rotate around the high pressure in place and shift the high pressure southward over the next couple of days. As this occurs, energy from the trough will rotate through the northern part of UT and CO, bringing clouds and some showers and thunderstorms.
Tonight and Thursday A quick moving cold front will continue passing through the western Great Lakes this afternoon and early this evening. Given the faster movement of the front, it is expected to track through early this evening, with clearing skies and cooler air moving into the region during the overnight hours. Thursday will be sunny and cooler behind the front as highs are limited to the 65 to 70 degree range, which is well below normal for this time of year.
A few showers or storms will be possible during the overnight hours, mainly favoring Coconino county, closer to a jet streak and cooler air aloft located west of the state. Similar conditions are anticipated through the remainder of the week and into the holiday weekend as high pressure remains centered over the region. We are still watching the potential for Tropical Cyclone development to affect the Baja peninsula over the weekend which could initiate a moisture surge into Arizona. At this point, moisture looks to increase across southwestern Arizona and perhaps as far north as Yavapai County, but any changes will depend on the potential cyclone track.
932 PM EDT Wed Aug 30 2017 A cold front approaching from the north will cross Lake Erie tonight and move through northern Ohio and northwest Pennsylvania by Thursday morning.
Thursday should be another relatively nice day with highs in the low to mid 80s and southeasterly winds.
709 PM CDT Wed Aug 30 2017 Weak high pressure over the Missouri River Basin this afternoon extends its reach into Central Illinois as Tropical Storm Harvey makes its way across the Gulf Coast. This afternoon, fair weather cumulus clouds dot the sky with moderate temperatures and light winds under the ridge. with light and somewhat variable winds under the ridge.