Aikyam-Lab/Synoptic-Bench huggingface dataset:
316 PM MDT Tue May 23 2017 One last day of cool N-NW flow over the region today, with brisk N winds and a few sprinkles noted as back edge of cooler air aloft rotates southward across the plains. Once winds die and clouds clear, min temps will drop to fairly cool levels, though most locations except for the higher mountain peaks should stay above freezing. On Wednesday, upper ridge builds into the Rockies, leading to lighter winds and much warmer temperatures areawide. Precip chances will be nil with building ridge and dry wly flow. upper level high pressure over Colorado will shift east into the Central Plains overnight, while the next upper disturbance begins to move across Wyoming late.
152 PM EDT Tue May 23 2017 High pressure will bring dry weather and a mix of sun and clouds to NY and PA through Wednesday.
257 PM CDT Tue May 23 2017 Scattered showers/isolated thunderstorms were noted this afternoon near the core of the upper low centered near La Crosse, Wi. The best moisture advection associated with the upper low was in southeast Minnesota this afternoon and this is where the best concentration of showers had occurred.
155 PM EDT Tue May 23 2017 Weak high pressure resides over the area today. A low pressure system tracks southeast of Long Island late tonight into Wednesday morning.
A cold front will move Southeast into SE GA late Wednesday. Out ahead of this front, a prefrontal trough is expected to result in a line of strong to severe storms sweeping SE across the region from late Wednesday morning through Wednesday evening.
Embedded in this southwest flow aloft is a 90+ kt jet max at 250 mb rounding the base of this trough, and moving across the region which is allowing for increasing UL diffluence. Looking at the sfc, a cold front has impinged upon the FA and located along a kcdh, to a ktxk to a ktyr line, with a movement to the southeast. Increased UL support provided by the aforementioned jet streak, coupled with frontogenetical forcing by the cold front and a rather moist atmospheric profile /PWATS of 1. 60 inches/ has resulted in isolated showers and thunderstorms, mainly along and behind the cold front. This will once again result in excellent radiational cooling /and perhaps some patchy fog/ leading to tomorrow night temps plummeting into the lower 40s across the north to lower 50s elsewhere /or some 10-15 degrees below norm/.
This convection should diminish by mid to late evening with the next round of precipitation moving in overnight in association with the main upper level trough and cold front.
High pressure will shift east of the region Wednesday.
303 PM CDT Tue May 23 2017 Large upper level low was located over northern Iowa this afternoon and will continue to drop south toward Missouri by Wednesday morning. Scattered showers continue to pop up across the CWA this afternoon around the backside of the low. Wednesday looks dry as the above mentioned upper level low continues to dig south and east allowing weak upper level ridging to build overhead.
239 PM CDT Tue May 23 2017 Issued at 238 PMCDT TUE MAY 23 2017 A large amplitude vertically stacked low pressure system resides over the northern plains creating most of the weather impacts in this region for the next 48 hours. This low will quickly push to the south through eastern MO Wednesday morning sparking off another around of showers over central MO which will also have limited thunderstorm potential and last off and on through sunset as the low starts to push east. Temperatures will remain below average on Wednesday as well with even a slight decrease of a couple degrees with the low overhead.
101 PM EDT Tue May 23 2017 High pressure centered over Pennsylvania will move off the east coast tonight.
257 PM MDT Tue May 23 2017 Isolated light showers dotting mainly the Neb Panhandle this afternoon on far west side of upper low over Iowa. A short upper ridge will pass across the region Weds boding for warmer and dry weather with mainly clear skies.
VFR will continue early tonight, but MVFR cigs along with VCTS will be possible at the northern terminals after 09Z as clouds and rain chances increase ahead of a cold front, with these conditions spreading to the southern terminals after 12Z.
High pressure will remain over the Northern Rockies through tonight. A strong, yet dry, cold front will sweep across the Northern Rockies on Wednesday, creating strong wind gusts region-wide. Some shower and thunderstorm activity will follow the cold front, but even this will be sparse compared to most cold fronts. Memorial Day Weekend, high pressure is expected to develop along the Pacific Northwest coast and then slowly creep east over time, steadily warming and drying the Northern Rockies. Memorial Day may actually be warmer than 80 degrees for low elevations, a notable rarity over the past several decades. A dry cold front will push south Wednesday morning through Northwest Montana, eventually reaching southwest Montana by the afternoon and evening.
331 PM CDT Tue May 23 2017 Upper low centered over Iowa this afternoon forecast to drop south toward the lower Mississippi Valley through Wednesday, with a cold front being driven south of the area this evening. Clouds will be more persistent across western AR through Wednesday given proximity of upper low, with a few showers possible through the day.
1214 PM MDT Tue May 23 2017 Latest upper analysis shows the closed low moving northeast with a ridge approaching from the west. At the surface winds continue to increase as the low level jet over the forecast area begins to mix down to the ground. In fact the low level temperature field was cooler last night over Eastern Colorado and lows only fell into the mid 30s. A warm front will move through the forecast area from the west.
1252 PM CDT Tue May 23 2017 A cold front has moved to southeast of a KPRX (Paris) to KINJ (Hillsboro) to KMNZ (Hamilton) line as of 1730z. The storms will be most focused along a cold front which will move across the entire region through the day. Dry northwest flow aloft will remain in place across the Central and Southern Plains on Wednesday as a deep upper trough digs into the southeastern U. However, the cool and dry air will be very temporary with building upper level high pressure and a return of Gulf moisture.
Today through Wednesday An active weather pattern continues for the next couple of days as an upper trough digs into the Gulf States. Late Tuesday night into Wednesday, the main trough axis moves into the area, bringing another round of rain/storms. At this time, models hint at the possibility of 2000+ J/kg instability building into the southeastern counties with dewpoints in the upper 60s to near 70, which could support some stronger storms as the main trough axis moves in. As the trough axis approaches, upper level diffluence will increase and an upper level jet strengthens by Wednesday morning. In addition any severe threat, the flooding potential will continue with any rainfall along the main trough axis.
235 PM CDT Tue May 23 2017 By early this afternoon, the mid-level trough axis was progressing eastward across the CWA with the associated closed mid-level low located over southern Minnesota/northern Iowa. Isentropic lift on the backside of this exiting trough was resulting in scattered showers developing over southern Nebraska, which were sliding southeastward across north central Kansas. With the mid-level trough remaining over Missouri through the day tomorrow, nearby showers in far western Missouri will keep cloud cover over eastern Kansas through much of the day.
Surface wise, a western Atlantic ridge extends across the Straits of Florida with a developing cold front over the extreme northwest Gulf of Mexico.
1233 PM CDT Tue May 23 2017 Water vapor imagery early this morning indicated a well-defined upper low across northern Minnesota. The upper low will move southward across Minnesota and Iowa today and into the Mid- Mississippi Valley on Wednesday. A few showers may linger on Wednesday before the upper low slides south and east of the area. However, temps will remain on the cool side with highs in the low to mid 60s.
1214 PM MDT Tue May 23 2017 The low pressure system that was located over swrn Ontario yesterday, has dropped southward across Minnesota overnight and is expected to be located in central Iowa by this evening. Have also included a slight chance of showers in those areas until early aftn, although moisture is limited and will become drier this afternoon as the upper ridge builds in from the northwest. Southerly return flow will develop on Wednesday with much warmer temperatures.
1203 PM CDT Tue May 23 2017 A sfc cold front extends for central IA into eastern KS. An upper low over centered over the Midwest will move south into northeast MO by 12z/7am Wed. Wednesday: The closed upper low over MO will move sse into TN by Wed night.
134 PM EDT Tue May 23 2017 First round of showers is moving out of the area, but the low clouds and some patchy fog will stick around through tonight.
350 PM EDT Tue May 23 2017 High pressure centered along the mid Atlantic coast will move off the coast tonight.
144 PM EDT Tue May 23 2017 High pressure will provide a dry Tuesday with seasonal temperatures, but unsettled weather will return on Wednesday. Model solutions have had substantial difficulty over the past few days managing the depiction of the digging and deepening of the mid/upper lower from the upper Mississippi Valley toward the Ohio Valley.
225 PM CDT Tue May 23 2017 A cold front pushed through the area early in the day with continued upper level energy cycling around the main upper level closed low which was up in Iowa. The short term forecast will focus on the upper low tracking south through the area and resultant cool temperatures/cloud cover and lingering scattered showers. For tonight, the upper low will drift into the area from Iowa, but scattered shower activity will diminish considerably after dark with the loss of daytime heating and instability. Additional shower activity will be possible on Wednesday, mainly in the afternoon, as the upper low slowly drifts southeast across the CWA and instability increases again. The low will track to the southeast of the area Wednesday night and showers should come to an end.
233 PM CDT Tue May 23 2017 The cold front that moved through the region this morning has successfully resulted in very unseasonably cool temperatures and increased cloud cover for the day. Temperatures will begin to warm Wednesday as upper ridging builds east, advecting very warm 850mb temps eastward.
359 PM CDT Tue May 23 2017 Afternoon surface analysis shows a cold front extending from Texarkana southwest to Austin. Satellite imagery shows thunderstorms already developing along the cold front as it progresses to the southeast. High pressure will build over the region during the day on Wednesday resulting in drier and cooler conditions.
Templer Previous Discussion - Temperatures continue to warm today with building ridge and low level southernly flow. Cold air advection and tighter pressure gradient will result in stronger northwest winds along with cooler temperatures for Friday. The latest 00z model consensus continues to reflect a gradually building upper level ridge pattern across the western U.
950 AM EDT Thu Jul 20 2017 Weak high pressure will build across the region today. A stronger cold front will approach Thursday night and cross the area Friday.
Upper level low will continue east across southwestern Canada today which will bring a weak cold front through the region. The front will move through the area this afternoon resulting in temperatures a few degrees cooler and winds switching to the west- northwest. Dry weather and mostly clear skies will continue through Friday as an upper low moves into southern Canada. The flow aloft will be southwesterly today then flatten somewhat to west-southwesterly on Friday due to the passage of the upper low to our north. A dry weak cold front will move through today, resulting in temperatures that will be a few degrees cooler.
An upper low will continue to push east across southern British Columbia today. This will result in breezy to locally windy conditions with cooler high temps.
900 AM PDT Thu Jul 20 2017 A building ridge of high pressure over the Great Basin will bring seasonally hot summer-like weather through the weekend.
VFR is expected through the next 24 hours with high pressure at the surface and in the middle layers of the atmosphere dominating over Deep South Texas and the Rio Grande Valley.
1127 AM EDT Thu Jul 20 2017 Weak high pressure will build across the region today. A stronger cold front will approach Thursday night and cross the area Friday.
The MCS located over the lower Great Lakes has continued to weaken.
High pressure aloft dominating most of the central and southern Plains. Aloft, an expansive ridge of high pres remains centered acrs the southern plains toward the lower MS valley, while an upper trough was located over the eastern seaboard. 24 While the main ridge axis is expected to remain north of the area, its influence is expected to build southward some today and Friday. Aftn highs today and Friday are expected to reach the lower to middle 90s outside of any locations that see showers. Shower and tstm chcs will again increase over the weekend as a portion of the trough over the east coast begins to translate around the southeastern and southern periphery of the upper ridge.
417 AM PDT Thu Jul 20 2017 An upper level ridge of high pressure will persist over the area through the weekend.
As an upper level cut-off low over the Carolinas this morning retrogrades southwest toward northeast Florida during the afternoon colder mid level temperatures (-8C to -9C at 500MB) associated with it could support some strong to severe storms with the potential for some hail with the strongest convection during the afternoon as steepening lapse rates support vigorous updrafts, especially across central and northern portions of the forecast area. Weak high pressure from the Atlantic extending west across the southern peninsula and into the Gulf will maintain light and variable winds and slight seas over the coastal waters the remainder of today with an onshore sea breeze component developing along the coast during the afternoon.
1047 AM CDT Thu Jul 20 2017 The upper level high pressure ridge has drifted a bit more southward this morning. Still have a 500 mb trough into the coastal areas east of Freeport; however, the ridge was over these locations at 850 mb and 700 mb. There was also still a weak trough at the surface. The ridge has helped to suppress showers and storms for almost the entire area at mid morning.
A mid to upper level low pressure system is situated just offshore of the NE FL / SE GA coasts with drier air on the back side thats sliding south over the forecast area. Shower and storm activity associated with the low is all east of the center and about 20 miles east of our offshore coastal waters. Have made a few tweaks to account for a slower start to convection based on HRRR model and the subsidence on the back side of the low pressure system. Weak ridge to our south will continue the light west flow this morning before turning east with the Atlantic sea breeze in the aftn.
However, they are going to be few and far between, especially as the upper level ridge responsible for the heat starts to really exert itself. Anything that does fire up should remain east of I-65 where the ridge won't be as strong. A hot summer pattern will continue under high pressure.
603 AM CDT Thu Jul 20 2017 Showers/storms on the nose of the low-level jet/stronger moisture transport producing locally heavy rainfall will continue to shift eastward as the low-level jet veers early this morning. Otherwise, it should be a pretty quiet day as the low-level surface boundary gets shifted southward again.
945 AM EDT Thu Jul 20 2017 RAP40 analysis shows central FL under a weak H100-H70 trough with the Atlc ridge axis blanketing south FL and the Bahama Bank. Lcl wind profilers map the trough axis quite well through the sfc-5KFT lyr with N/NW winds at KJAX/KTBW veering to S/SW at KMFL/KMLB/KXMR. on the ascending right flank of the trough, Gulf Stream convection has been very active in the predawn hrs. 5C indicates thermal ridging has strengthened a touch. Atlc ridge axis positioned over south FL/nrn Bahamas will combine with a weak trough over central/north FL to generate a light to gentle S/SW breeze over the lcl Atlc.
626 AM CDT Thu Jul 20 2017 Excessive heat and humidity will be the story for the next 72 hours as an upper level ridge moves overhead stacking down to low level high pressure over the southern Mississippi Valley area. The result will be temperatures in the upper 90s to near 100 degrees and dewpoints in the lower to mid 70s which will allow heat index value to range from 105 to 115F over the region. The highest dewpoints will occur today for this event leading to the hottest day for heat index values especially north of the Missouri River, with 110-115F values over Atchison and Holt Counties.
Building high pressure aloft has modified the airmass since just yesterday morning.
1058 AM CDT Thu Jul 20 2017 Temp trends are rebounding with authority across much of the cntrl TN Valley this late Thu morning, from their earlier lows mainly in the lower/mid 70s. Unfortunately, dew pts are also trending in the lower/mid 70s for many areas, which is not making it very comfortable as far as the humidity goes. Low chances for showers/tstms also remain in place mainly for areas along/e of the I-65 corridor later today, as weak upper disturbances traverse swd along the ern fringe of the upper ridge pattern centered over the Midwest/Mid South regions.
The mid-level ridge should remain entrenched across the region such that precipitation chances remain low. The mid-level ridge in place across Oklahoma and the Texas panhandle is expected to remain anchored across the region. While I can't completely rule out a rogue shower or two beneath the H5 ridge, it's unlikely to persist long enough to warrant inclusion of appreciable PoPs/Wx in the worded forecast.
413 AM PDT Thu Jul 20 2017 An upper level ridge of high pressure will persist over the area through the weekend.
/issued 445 AM CST Tue Jan 23 2018/ Deep upper low that brought showers and storms to the area yesterday morning is now quickly moving into the Great Lakes region. At the sfc, high pres continues to ridge east over the area, with dry and cool conditions in place early this morning.
445 AM PST Tue Jan 23 2018 Dry and warmer weather will continue through Wednesday.
1040 AM EST Tue Jan 23 2018 A cold front will exit central NC early this afternoon.
421 AM MST Tue Jan 23 2018 Upper trof moving across the region this morning with clearing skies. Still a little potential for freezing fog in the valleys but not much sign of it yet. Otherwise dry and warming conditions expected over the next few days as an upper ridge builds across the Rockies.
High temperatures look to be close to yesterday to a few degrees cooler.
/issued 455 AM CST Tue Jan 23 2018/ The Four State Region will be under the influence of high pressure on the surface and aloft for much of the rest of this week resulting in a fair weather pattern with near normal temperatures. Overnight lows the next couple of night will lower to near or below freezing.
544 AM EST Tue Jan 23 2018 A cold front will bring showers and a few thunderstorms today, along with gusty winds.
Chattanooga Airport, TN 50 30 49 29 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 50 30 44 27 / 10 10 0 0 Oak Ridge, TN 48 30 45 27 / 10 10 0 0 Tri Cities Airport, TN 50 29 41 24 / 30 20 10 0.
Patchy slick spots from last nights snow showers may be present, especially over bridges and overpasses. Patchy valley freezing fog has also developed this morning across western Montana and north-central Idaho, which could add to the slick spots as well. There could be pockets of brief freezing rain as the snow transitions to a mix of rain/snow for northwest Montana (low confidence with freezing rain). Due to this, Winter Weather Advisories have been issued overnight, for the Lower Clark Fork region to Lookout, as well as for northwest Montana, and for elevations above 3000 feet in Clearwater County in Idaho.
Chattanooga Airport, TN 51 30 49 29 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 50 30 44 27 / 10 10 0 0 Oak Ridge, TN 48 30 45 27 / 10 10 0 0 Tri Cities Airport, TN 50 29 41 24 / 20 20 10 0.
High pressure over North Texas will maintain northeast winds with VFR conditions likely through the next 24 hours.
Following yesterday's frontal passage, high pressure at the surface will slide south and east into our area today. Temperatures today will be just about what is normal for late January with highs ranging from the lower 50s in the north to around 60 in the south. With clear skies and light northerly winds, cooler conditions will occur tonight. Overnight lows will drop into the lower to mid 30s areawide.
At the surface, an associated cold front is slowly making its way through the Florida peninsula and eastern Gulf of Mexico, with a low-level south to southwest wind flow in place across the region. For the rest of the day, the cold front will slowly move southeast across the peninsula, but will lose much of its support aloft. Once the front moves through, the lower clouds should start to break up some, with time sections showing this by around 18Z for Tampa Bay. The low cigs will improve around 00Z for KTPA and KPIE, then later for KSRQ and still later for the southern sites. A cold front will move through the region today and tonight, with south to southwest winds turning more northward tonight.
404 AM MST Tue Jan 23 2018 Current surface analysis shows low pressure over southeast SK, with a frontal boundary well north and east of the region. Upper level analysis shows Low pressure over the western Great Lakes region, with a ridge along the west coast.
519 AM CST Tue Jan 23 2018 High pressure will mean VFR conditions at all area airports through this TAF period. We have trended the forecast toward the cooler guidance numbers.
643 AM EST Tue Jan 23 2018 Cloudy skies and cold air will be the resultant weather behind the cold front that crossed the region last night. A weak upper level trough will keep cloudy skies and a threat for light snow in the forecast through early Wednesday.
The rain has moved out but the cold front has not completely moved through yet. In the upper levels a trough will be over the Southeast today. At the surface the cold front is currently (1 AM EST) near Montgomery, Alabama. This cold front will move through most of the region by mid morning. Rain chances will decrease around sunrise as the cold front moves through the region.
Upper low over western Illinois will make its way ENE into the Great Lakes today. Seasonably chilly and somewhat raw conditions will continue into Wednesday, as another upper wave swings through the Ohio Valley and the low-level thermal trof takes its time lifting out.
316 AM MST Tue Jan 23 2018 High pressure over the Rockies this morning.
445 AM CST Tue Jan 23 2018 Deep upper low that brought showers and storms to the area yesterday morning is now quickly moving into the Great Lakes region. At the sfc, high pres continues to ridge east over the area, with dry and cool conditions in place early this morning.
304 AM PST Tue Jan 23 2018 Offshore flow and a building upper level ridge will bring a few days of substantial warming to the region.
At the surface, nearly stationary high pressure over North Texas will maintain northeast flow through the short term period. This afternoon temperatures will be a few degrees cooler than yesterday, with highs near normal in the low 70s, with northerly flow and 1000-500mb thicknesses falling a couple decameters. Moisture will increase from the south late tonight into Wednesday morning, bringing increasing cloud cover and rain chances across mainly the southeastern corner of the area, including the lower Rio Grande Valley and southern coastal waters.
939 AM EST Tue Jan 23 2018 Cloudy skies and cold air will be the resultant weather behind the cold front that crossed the region last night. A weak upper level trough will keep cloudy skies and a threat for light snow in the forecast through early Wednesday.