Aikyam-Lab/Synoptic-Bench huggingface dataset:
700 AM EDT Sat Jul 8 2017 Cold front crosses this morning. Cooler and less humid under high pressure Sunday. Quieter weather expected in the near term, however still have potential for isolated showers until cold front and upper level trough make it through the forecast area. The cold front is currently in NW Ohio, and should cross through the forecast area by mid morning. Upper trough will then cross this afternoon and evening. Cooler and drier air filters in late today and tonight, with temperatures bottoming out in the 50s early Sunday morning. Strengthening southwest flow in the lowest levels will bring in above average temperatures and surface dew points reaching the low 70's through the work week.
306 AM EDT Sat Jul 8 2017 Cold front crosses this morning. Cooler and less humid under high pressure Sunday. Quieter weather expected in the near term, however still have potential for isolated showers until cold front and upper level trough make it through the forecast area. The cold front is currently in NW Ohio, and should cross through the forecast area by mid morning. Upper trough will then cross this afternoon and evening. Cooler and drier air filters in late today and tonight, with temperatures bottoming out in the 50s early Sunday morning. Strengthening southwest flow in the lowest levels will bring in above average temperatures and surface dew points reaching the low 70's through the work week. With the cold front lagging well to the west, expect low stratus to form and cause restrictions early this morning.
This heated and moistened airmass is in place ahead of approaching cold front, seen by wind shift extending across ncntl IL. Dew points should be falling into the low to mid 60s, and more or less staying there, thru the remainder of the weekend. Dewpoints in the lower to middle 70s will cause heat indices to flirt with 100 mainly Wed and Thu. All the models showed an initially somewhat amplified western ridge/eastern trof pattern gradually flattening as the western ridge expanded eastward. Thunderstorms along a cold front were exiting the taf sites as of 05z.
301 AM EDT Sat Jul 8 2017 A mid level trough axis and associated sfc cold front will continue their eastward advancement across the ern Great Lakes early this morning. An 850mb thermal trough (temps of +8 to +9C) will settle overhead this afternoon. This cooler air will support high temps in the 70s. Humidity will be also be much less today as sfc dewpoints drop into the low 50s. A mid level trough axis is forecast to pivot around a seasonally deep Hudson Bay upper low this weekend, driving a secondary cold front into the northern Great Lakes on Sunday. Otherwise, slight warm air advection under low level sw flow will drive high temps back up into the low 80s.
359 AM CDT Sat Jul 8 2017 The upper level ridge over the Great Basin region will keep the Panhandles in northwest flow today and tomorrow.
Although mostly clear conditions have remained through much of the night, temperatures have been trending a degree or two warmer than last night.
424 AM MDT Sat Jul 8 2017 An upper level ridge of high pressure will be over the region today and Sunday.
With a cold front expected to move across the area in the afternoon, scattered showers and thunderstorms will be possible at all sites, and VCTS will be included in the forecast to account for this.
Strong ridging over the Four Corners region and trough in the Gulf of Alaska will remain in place with little variation.
Temperatures will be similar to today, mainly in the lower 90s. The region will be under a perpetual ridge, with a transition between being on the eastern side of the ridge (bringing in northwest flow aloft) or being directly under the ridge.
411 AM EDT Sat Jul 8 2017 A cold front along the south shore of Lake Erie will move southeast of the area this morning. High pressure will build over the lower Great Lakes tonight and Sunday before moving off the East Coast Sunday night. The surface cold front is making only slow progress this morning. High pressure will dominate tonight and Sunday with clear to mostly clear skies expected. Have stayed cooler than guidance for highs today as the models are likely underestimating the cloud cover.
Weak cold front will move into the forecast area this evening and remain over the area overnight.
406 AM MDT Sat Jul 8 2017 An upper level high will remain centered over the Great Basin with weak nnw flow aloft continuing over nrn CO. Will see sct storms develop over the higher terrain by midday with outflow boundaries allowing for some development along the front range urban corridor by mid to late aftn. The upcoming week will see a continuation of the summer pattern over the western United States with a strong upper ridge over the Rocky Mountain West.
438 AM EDT Sat Jul 8 2017 A low risk for isolated showers and thunderstorms will persist on Saturday before less humid and slightly cooler air ends the threat on Sunday. The high-res models focus convection over NW to N-Central PA this morning before pushing southeast during the early to mid afternoon. A significant push of drier, less humid air with below normal PW values will arrive tonight as high pressure slides east from the Midwest. Clear skies along with the relatively low dewpoint air will result in a refreshingly cooler night with minimum temps ranging from the mid-upper 40s NW to upper 50s- near 60F in the SE. Expect a pleasant/comfortable (low-humidity) and rain-free end to the weekend with high pressure in control.
Combination of post synoptic front and possible modified surface air from convection could keep temperatures Saturday as much as 10 degrees cooler than this afternoon, although reality may only bring about 5 degrees off. The drier air will also mean hotter temperatures heading into midweek, with very low chances for organized thunderstorms as the upper high across the southwest states extends it's influence into the central and southern plains. Surface observations also indicating ceilings may fall into to the low MVFR category for a couple of hours also.
Temperatures will be similar to today, mainly in the lower 90s. Heat is the main story during the extended with a broad ridge of high pressure dominating the pattern through the end of the week.
Conditions will improve to MVFR or VFR at all sites after 14 UTC with locations in western and northwestern Oklahoma as well as western north Texas having the highest chances for VFR conditions. /issued 303 PM CST Sun Feb 18 2018/ The amplification of a western trough and eastern ridge will coincide with the transport of very moist air into northern Texas and Oklahoma through Monday.
A boundary to the north of the state will dissipate as the high pressure center to the north of that builds south across the area tonight and then shifts east over the Atlantic Monday. Highs in the lower to mid 80s.
Surface analysis this afternoon places a warm front over portions of Louisiana, Southern Mississippi and Alabama. Visible satellite trends have continued to indicate increasing clouds across the Mid-South throughout the day as the warm front is beginning to move north across the Lower Mississippi Valley. A warm front is expected to move north across the Mid-South tonight. At this time, expecting rain chances to gradually diminish south of I-40 overnight as the warm front continues to push north towards the Middle Mississippi Valley.
916 PM EST Sun Feb 18 2018 A warm front will approach from the south late tonight, and rain will overspread the area Monday morning.
High pressure ridge building northeast from the Mid-Atlantic coast will lead to a strengthening of E/SE winds in the lower levels. Milder temperatures expected into tonight, with lows in the low 60s inland and along the Volusia Coast to mid-upper 60s along the coast of Brevard County southward. High pressure ridge axis north of the area will lead to an increasing E/SE wind flow over the waters, up to 10-15 knots from about Cape Canaveral southward tonight.
This week will be interesting with a quasi-stationary West Coast trough keeping our area under southwesterly upper flow.
Areas of fog and possibly some freezing drizzle will develop. Freezing drizzle can not be ruled out, so it will be mentioned along with the fog. The broad upper level trough will push east across the Great Basin Monday night, while a 120+ kt jet max ahead of this feature races north across the forecast area. There is weak to moderate Q-G ascent ahead of the trough, and we'll be getting into the right rear entrance region of the upper level jet.
518 PM CST Sun Feb 18 2018 This afternoon warm front to the South finally making a move and across Deep East Texas and Lower Northwest and North Central Louisiana with temperatures warming into the seventies. Overnight the better chance for rain and embedded showers will be across Northeast Texas, Southeast Oklahoma, and Southwest Arkansas with the approach of the warm front and weak upper disturbances moving in the Southwest flow aloft with Pacific moisture. For the upcoming week a longwave trough of low pressure will be amplifying across the Western States while a high pressure ridge of high pressure amplifies across the East Coast and Western Atlantic Coastal areas which will keep a Southwest flow pattern across the Four State Region.
BMickelson Previous discussion: Synoptic Setup: Center of the Arctic air lies over the Hudson Bay with a trough extending southwest through the southern Canadian Prairies and into the Pacific Northwest where it becomes more Pacific like.
443 PM MST Sun Feb 18 2018 Upper level analysis has large trof and associated low digging into the Pacific Northwest, with fast west southwest flow across the Northern Plains.
A very cold upper level trough will drop south into the Great Basin from the Pacific Northwest late tonight.
613 PM EST Sun Feb 18 2018 Warm front late tonight into Monday. Cold front midweek brings showers and storms. High pressure crosses overhead this afternoon providing clear skies and warm temperatures into the lower 50s lowlands, ranging to the mid 40s higher elevations. As the high pressure moves east of the mountains, flow will turn southwest bringing a warm front with its associated warmer and moist air to our area. The areas of pcpn will tapper off from south to north Monday allowing plenty of sunshine and temperatures to climb into the lower 70s lowlands, ranging to the mid 50s higher elevations.
Thus, will maintain a chance of scattered showers and thunderstorms tonight with the highest chances across the northern half of the area.
1000 PM EST Sun Feb 18 2018 High pressure is expected to drift offshore tonight as a weak warm front begins to lift north through the area early Monday.
A cold upper level low pressure system in place over the western United States will maintain cloudy and very cold conditions across the northern Rockies and Montana through Monday with generally light snow decreasing to flurries later tonight through Monday.
In the low levels of the atmosphere, an Atlantic ridge of high pressure will extend across the Southeastern United States overnight. In the mid levels of the atmosphere, an area of high pressure will be centered just north of the Bahamas tonight. In the upper levels of the atmosphere, a ridge of high pressure will be located over the Bahamas overnight.
541 PM CST Sun Feb 18 2018 Winds this evening will begin swinging around to westerly and then northerly as the strong low pressure system, which brought this morning's winds, exits to the east. This system will advect and lift moist air around the eastern and northern side of the low pressure center, bringing a wintry mix of precipitation to most of northwest Iowa, portions of southern Minnesota, and the Sioux City vicinity during the early morning hours. Precipitation type will likely begin as freezing drizzle before changing over to sleet as the lowest saturated levels of the atmosphere cool below -10 C.
601 PM EST Sun Feb 18 2018 A warm front will approach from the south late tonight, and rain will overspread the area Monday morning.
513 PM MST Sun Feb 18 2018 Low-level gradients are finally starting to diminish w/the passage of a strong cold front across southeast Wyoming and the western NE Panhandle. Do think this will limit snow chances for a time, and could even yield some temporary sunshine over the high mountains into Arlington/Laramie. This occurs as cold front stalls over southern Wyo, resulting in a rapid increase in low-level gradients and 0.
Chattanooga Airport, TN 54 71 56 76 / 60 10 10 10 Knoxville McGhee Tyson Airport, TN 51 69 54 76 / 60 10 10 10 Oak Ridge, TN 51 69 55 76 / 60 20 10 10 Tri Cities Airport, TN 45 70 48 75 / 60 30 10 10.
For those who want it warmer, I've got a treat for you over the next couple of days. Partly cloudy skies this afternoon are going to give way to an overcast cloud deck this evening as a warm front lifts northward through Middle TN. Spotty showers are likely to accompany the warm front passage, though I don't think everyone will see rain.
Cold high pressure moving into the area from the north while upper level trough over the PacNW moving towards Montana from the west. Trough is filling as it approaches the area and becoming less dynamic which is combining with deepening cold air to reduce snowfall rates. However energy ejecting from the trough will still stream over southeast Montana and snowfall rates will continue to produce a couple of inches of snow.
The low pressure system/cold front has been able to sink southeast of the forecast area this afternoon, with temperatures slowly falling throughout the day behind this boundary. The 500mb low deepening over the Pacific Northwest will push a large trough across the western half of the nation tonight into Monday morning, with plenty of moisture overspreading the area. The boundary south of the region will be continuing to drop south, so will lean toward the southern parts of the CWA likely seeing the highest amounts of snow.
Gusty S-SE winds expected on Monday as low pressure tracks across the central plains. A weak cold front associated with the aforementioned southern Plains low is progged to move into the northern parts of the state on Tues. A pocket of drier air circulating around an upper level ridge and moving over SE TX, along with these stronger wind speeds could allow for a short break in dense fog conditions allowing visibilities to improve temporarily Monday morning.
408 PM CST Sun Feb 18 2018 Winds this evening will begin swinging around to westerly and then northerly as the strong low pressure system, which brought this morning's winds, exits to the east. This system will advect and lift moist air around the eastern and northern side of the low pressure center, bringing a wintry mix of precipitation to most of northwest Iowa, portions of southern Minnesota, and the Sioux City vicinity during the early morning hours. Precipitation type will likely begin as freezing drizzle before changing over to sleet as the lowest saturated levels of the atmosphere cool below -10 C.
The unusually strong upper level high pressure just off the southeast U.
727 PM EST Sun Feb 18 2018 High pressure will move off the East Coast on Monday.
Gusty S-SE winds expected on Monday as low pressure tracks across the central plains.
Expect light showers especially after dawn Monday in the north and west, as a cold front approaches.
918 PM CST Sun Feb 18 2018 Warm front currently along a Tyler to Texarkana and El Dorado line continues to gradually shift north.
633 PM EST Sun Feb 18 2018 A warm front will approach from the south late tonight, and rain will overspread the area Monday morning.
610 PM PST Sun Feb 18 2018 An Arctic cold front will bring gusty north winds and occasional snow showers through this evening. A surface inverted trough along the Idaho/Washington border will delay improvement at the KPUW TAF site with MVFR -SHSN possible through much of the night.
South winds look to continue to be around 10 to 15 mph tonight, and expecting low temperatures to be much warmer in the mid 50s thanks to southerly winds and cloud cover. VFR conditions are expected for the next few hours but MVFR cigs will develop as a warm front lifts north across the area.
/issued 518 PM CST Sun Feb 18 2018/ This afternoon warm front to the South finally making a move and across Deep East Texas and Lower Northwest and North Central Louisiana with temperatures warming into the seventies. Overnight the better chance for rain and embedded showers will be across Northeast Texas, Southeast Oklahoma, and Southwest Arkansas with the approach of the warm front and weak upper disturbances moving in the Southwest flow aloft with Pacific moisture. For the upcoming week a longwave trough of low pressure will be amplifying across the Western States while a high pressure ridge of high pressure amplifies across the East Coast and Western Atlantic Coastal areas which will keep a Southwest flow pattern across the Four State Region.
755 PM PST Sun Feb 18 2018 An Arctic cold front will bring gusty north winds and occasional snow showers through this evening. A surface inverted trough along the Idaho/Washington border will delay improvement at the KPUW TAF site with MVFR -SHSN possible through much of the night.
Only patchy fog is expected again later tonight thanks in part to a well mixed boundary layer and nearshore waters that are becoming warmer than several days ago. /issued 355 PM CST Sun Feb 18 2018/ Warm temperatures will continue to be the rule across the area thanks to a pretty pronounced high pressure over the Atlantic. This ridge should keep us fairly dry from frontal boundaries for the next few days. Onshore flow around the high will keep moisture in the atmosphere and a few stray convective showers cannot be ruled out any day this week. The high over the Atlantic should keep our area out of the heaviest rainfall, but the placement and the ultimate position of the frontal boundary will still need some tweaking over the next few days.
907 PM EST Sun Feb 18 2018 Warm front late tonight into Monday. Cold front midweek brings showers and storms. High pressure crosses overhead this afternoon providing clear skies and warm temperatures into the lower 50s lowlands, ranging to the mid 40s higher elevations. As the high pressure moves east of the mountains, flow will turn southwest bringing a warm front with its associated warmer and moist air to our area. The areas of pcpn will tapper off from south to north Monday allowing plenty of sunshine and temperatures to climb into the lower 70s lowlands, ranging to the mid 50s higher elevations.
There has been a period of light to moderate snow across the Lower Columbia Basin and the Blue Mountains/Foothills as well as north central Oregon and along the Cascade east slopes.
656 PM EST Sun Feb 18 2018 A frontal boundary south of the forecast area will lift north as a warm front tonight into Monday morning.
The windy conditions will persist overnight and especially into Monday as strong upper trough digs across the Southwest.
340 AM EDT Sat Apr 29 2017 High pressure ridging into the forecast area from the Atlantic will dominate through Sunday and help keep any thunderstorms mainly associated with heating isolated.
120 AM EDT Sat Apr 29 2017 A warm moist southerly flow will continue through the weekend, as a strong high pressure remains anchored off the Southeast U. And the orientation of the mid level anticyclone will shunt any isolated mountain convection well to our NW. Expect highs in the low to upper 80s with highest temperatures across the east with increasing clouds in the west keeping conditions cooler.
Very weak ridging builds across the region this evening as this system tracks quickly east away from our region, only to be followed by yet another system moving toward the region from the Pacific NW.
402 AM EDT Sat Apr 29 2017 Unseasonably warm conditions will prevail over the weekend as strong high pressure holds offshore.
258 AM MDT Sat Apr 29 2017 Imagery shows longwave trof across the CONUS with closed low in base of trof centered over the 4 corners. Strong 120 to 160 kt jet associated with the LW trof stretches from the west coast down through the Desert SW. SFC has a cold front well south of the region across the srn Rockies/srn Plains with high P building into/across the nrn tier of states including WY. Weal inverted trofs extending from swrn CO into scntrl/cntrl WY and another through UT and into sern ID. Upper closed low continues to slip s/se along with the cold front, moisture return and associated precipitation. These general conditions will last well into Sunday before an upstream sw trof rides through the nw flow aloft and into wrn WY with late afternoon/evening showers breaking out west of the Divide.
358 AM CDT Sat Apr 29 2017 High pressure will remain in control today keeping conditions dry with pleasant temperatures, albeit a bit on the cool side and below normal. Winds look to be around 10 mph or less over areas where RH will be the lowest. Bumped up highs today a couple degrees based on slightly warmer temps aloft and comparing conditions to yesterday's temps.
352 AM EDT Sat Apr 29 2017 Warm front lifts through overnight.
Warmer and less windy today as short wave upper ridge comes in from the north Pacific. As an upper level ridge builds off the coast, the area is expected to remain in a northwest flow with most shower activity occurring along the divide.
With the warm front still south of the area, the atmosphere over the region is relatively stable and is working hard to weaken any convection. This will keep in the threat for showers and storms through much of the day and will also help to drive the surface warm front to the north, thus destabilizing the atmosphere as the day progresses. With the warm front drifting northward today, there will be a wide range of temperatures from north to south. The north will remain in the cooler and less humid air, while the south, generally south of PIT, will see warm temperatures and rising humidity levels. Warm front will remain near the New York border through Sunday night as heights rise aloft. With a mid level ridge on Sunday much warmer and more humid conditions will develop.
A high pressure over the central Atlantic this morning, has its western ridge extending over Georgia and South Carolina.
High pressure over the west coast will bring another fair day today.
508 AM EDT Sat Apr 29 2017 Showers and thunderstorms will continue to develop today along a slow moving warm front. Drier conditions are expected Sunday when the warm front is forecast to be near Lake Erie.
610 AM EDT Sat Apr 29 2017 Warm front remains just to the north today.
A highly amplified upper flow pattern was present over the WRN CONUS Saturday morning, with a ridge present offshore over the Pacific, and a deep trough located across the Rockies. A minor upper impulse is forecast to move through the top of the ridge Saturday night into Sunday morning, which will drive a weakening surface front southward toward far NWRN CA. Thereafter, model guidance shows the upper ridge gradually shifting EWD through the middle of the upcoming week.
627 AM EDT Sat Apr 29 2017 A warm front will move slowly north from the Ohio River this morning to southern Michigan Sunday causing showers and scattered thunderstorms in our area. Cool temperatures tonight will warm considerably Sunday behind the warm front. A cold front will sweep across the area Sunday night causing showers and possibly thunderstorms.
Closer to home, an upper level ridge sits just to the east of the Florida peninsula. There is not much to speak of in the way of lift with the ridge being the main weather influence. The weaker cap should allow for a few isolated to scattered summer-like afternoon shower/storms with the better chances in the higher elevations. The higher heights aloft and insolation will push temperatures up into the upper 80a and low 90s for most valley locations.
Weak high pressure then moves in to allow the remainder of the overnight and daytime hours Saturday to remain dry. Moisture streaming through this weak high pressure will allow for clouds to thicken and lower through the day and into the evening but VFR conditions are expected to prevail but some rain may make its way into the northern locations near 06Z Sunday and beyond.