Aikyam-Lab/Synoptic-Bench huggingface dataset:
414 PM EDT Wed Apr 26 2017 High pressure will build across the southeastern United States resulting in a considerable boost to the temperature with above seasonal warmth expected by the weekend. With low pressure off the middle Atlantic coast pulling away and some ridging aloft, expect quiet weather to prevail through tonight. For Thursday, despite most energy guidance is becoming a bit more enthusiastic and faster with the cold front approaching from the west tomorrow. Unseasonably warm, summerlike weather expected with the potential for showers and thunderstorms especially along and west of the Blue Ridge Mountains heading into the latter part of the week.
Warmer afternoon temperatures are expected today and Thursday with breezy winds beginning this afternoon.
340 PM EDT Wed Apr 26 2017 A trough of low pressure extended from Wisconsin to Texas along a cold front. Low pressure will strengthen in Arkansas along the front this evening and move north to the central Great Lakes overnight. Thursday the low will continue north into Canada and the trailing cold front will sweep east across the area.
Still enough of a warm layer aloft to bring some brief periods of freezing drizzle or light freezing rain as well, but expect this trend to slowly diminish through the morning as the column continues to cool.
Snow levels will lower to mountain bases in the north, though accumulations will be limited in the lower elevations. A cold front associated with this system sweeps southeastward across much of the forecast area late tonight through Thursday morning. Despite less available moisture, expect showers will continue into Thursday night as a broad trough settles over the region. Overnight lows will be cold, but expect clouds and moisture should prevent temperatures from reaching freezing in the lower valleys. Off the west coast, a well-amplified ridge begins to set up for the latter half of the week.
We are seeing temepratures cooling to around freezing in the northwest cwa already. Further north adjacent areas reporting a mix of freezing rain. Road temperatures from IEM freeze is showing temepratures close to freezing in the northwest cwa as well. A call to Todd county indicated no problems with freezing. We may see temperatures drop another degree or two and this could generate some freezing rain in Douglas, Todd and Morrison county this morning. Believe any issue on road surfaces will be relieved by mid/late morning with radiation through clouds as the sun rises and temperatures remaining around freezing. Any remaining precipitation will likely be in the form of drizzle/light snow or freezing drizzle. Temperatures are expected to cool through the upper 20s west and the lower 30s to the east.
On the back side of the upper low, drier air, as evidenced by satellite imagery, will gradually make its way east. Temperatures tonight will be the coldest in the 7 day forecast period as the base of the H5 trough rotates through the area dragging -4 to -6C temps at H85 along with it. All areas are expected to go below freezing so people with vulnerable vegitation outdoors should make plans to mitigate the impacts of below freezing temperatures for several hours overnight. This in turn will allow temps to warm into the lower 50s most areas, which will be 10 to 15 degrees more than today, but still below normal for this time of year.
A warming and drying trend will then get underway beginning Thursday and likely continuing into the upcoming weekend as high pressure builds over the eastern Pacific.
Snowfall rates haven't been terribly high this afternoon with accumulations fairly slow to pile up, especially on warmer road surfaces. However, snowfall rates will have to get pretty intense to start accumulating a lot on the warmer roads. Some lingering snow showers might stick around far northeastern portions of the area early on Thursday before surface ridging builds in with a mostly dry day expected. Temperatures will finally begin to rebound a bit across the west near the ridge axis with readings into the 40s, but remain a bit colder in the 30s in the far east as the previous system slowly pulls away. with the stronger stream crossing the southern plains and carving out a broad upper trof.
Winds will gradually increase through Thursday night as a trough moves out of the Colorado Front Range.
Dewpoints are in the upper 50s to lower 60s, with temperatures reaching into the lower 80s at most locations. A trough will cross the Lower Mississippi River Valley and pivot to the northeast, pushing a front toward Central Alabama.
In addition, the low level jet will really get going along the Tennessee River east to just off the Cumberland Plateau this evening. Even though the line of storms will likely weaken somewhat as they approach Middle Tennessee, the low level jet and strong surface winds combined will likely keep the concern for damaging winds with these storms overnight especially west of I-65.
608 PM EDT Wed Apr 26 2017 Warm, dry weather will be interrupted by showers and storms with a Thursday cold front. Generally light southerly flow will continue over the area overnight as high pressure starts to slip eastward. Subsidence from this should allow for clear skies to remain, which coupled with dewpoints in the 50s, which will be about the lows in the morning, as well as wet soil across the eastern portions of the CWA, may allow for some local fog formation around Jefferson County, PA, or amongst the ridges. Fries A cold front associated with an occluding system will cross the CWA during the late afternoon/early evening.
138 PM PDT Wed Apr 26 2017 Windy conditions with light Sierra showers will continue into tonight as low pressure moves through northern Nevada. High pressure returns for the weekend with warm and dry weather.
1240 PM CDT Wed Apr 26 2017 Today & Tonight: During the night, a DEEP upper-deck long wave trof that played vital role in severe thunderstorm development across primarily OK continued to move E. The ewd-moving long wave will continue to push a strong, but slow-moving, cold front SE with the front not expected to reach the Lwr-MS Valley until this eve. As the cold front continues to push SE, inverted lwr-deck ridging will punch S. Sat-Sun: We're in for a sopping wet weekend as the afore-mentioned upper- deck cyclone moves in a more Ely manner across Southwest KS & the Panhandles Sat Night. With the intense mid-upper cyclone tracking E/NE across Wrn OK late Sat Night rainfall intensities would increase. MVFR ceilings continue to improve to VFR from west to east as the trough axis propagates eastward across the Central Plains.
Front and associated convection should move quickly through the area during the evening hours, with the front expected to be east of the Lower Atchafalaya by 06Z. This initial feature will quickly lift out to the NE THU night into FRI, well away from the region, but will be followed by a more significant upper trof digging into the Four Corners. 13 South winds are starting to decrease over the coastal waters, and will continue subsiding from west to east as a cold front approaches the area. Winds will diminish early Thursday morning as high pressure begins to settle into the area.
158 PM EDT Wed Apr 26 2017 Warm, dry weather will be interrupted by showers and storms with a Thursday cold front. Dry conditions and limited cloud coverage will prevail the remainder of the afternoon and overnight as high pressure transitions over the area. A cold front associated with an occluding system will cross the CWA during the late afternoon/early evening.
Temperatures west of the boundary have touched 80F, while remaining in the lower to mid 70s in the lake shadows. The accompanying cold front is roughly aligned along the mean steering flow vector - which will limit the eastward progression through the night. Consequently, the deep moisture plume along the cold front will take all night to advance east into portions of Southeast Michigan. During the day Thursday, the cold front will be dominated by confluent flow - limiting the ability to provide a solid ribbon of ascent.
439 PM EDT Wed Apr 26 2017 A cold front will approach the region tonight and move across the area on Thursday. High pressure will briefly build in behind the front. Although low clouds will be left behind the precipitation, it does appear that some instability will develop as cooler temperatures aloft associated with a short wave trough spreads across the region. This may be sufficient for new development of showers and thunderstorms as a cold front crosses the area. High pressure will build in Thursday night allowing for skies to clear.
337 PM MDT Wed Apr 26 2017 Current surface analysis shows weak high pressure nosing south out of central Canada and into the Dakotas. Low pressure is located across southern BC, with cold front stretching across the Pacific NW.
The models continue to want to start closing off an upper low either in Colorado or over southern Wyoming late Thursday. so the active pattern continues through Thursday with 700 mb temperatures starting to drop off precipitously Thursday night as the main upper system starts to swing through and the low starts to close off.
245 PM CDT Wed Apr 26 2017 Upper trof/shear axis will continue to move northeast tonight, with all the pcpn gradually ending this evening. Thus, temperatures should be appreciably warmer than the past 24 hours.
A cold front was perched just northwest of the region.
1211 PM MDT Wed Apr 26 2017 Upper level analysis has large trof over the central CONUS with weakening closed low over the Dakotas. At the surface, Canadian high pressure has moved into western areas with boundary layer winds out of the north to northwest at 10 to 20 mph.
310 PM EDT Wed Apr 26 2017 Cold front crosses the region on Thursday. Weak warm front move through this weekend.
A warm sunny day is expected today courtesy of a strong southerly flow in between a ridge to our east and a deep trough to our west. High temps should top out in the lower 80s. Tonight the upper trough will lift northeast over the central CONUS pushing a cold front through the Ohio Valley.
The trough looks to become negative-tilt tonight, and as it does so we will see an increase in winds above the surface, with the latest hi-res guidance showing a 60- to 70-knot 850 mb jet by 6Z in a narrow north/south axis across the region. Those showers should end during the morning hours as the front pushes east of the region and a narrow bubble of high pressure builds over the Ohio Valley by the end of the day Thursday.
Additionally, a cold front currently extending from west- central Missouri through eastern Oklahoma will slowly move east today. Temperatures today will be a mess with the cold front passing through along with showers and thunderstorms around. Steady or slowly falling temperatures are expected behind the cold front with high temperatures occurring in the morning over many locations. Showers and thunderstorms will then exit the region tonight as an upper level trough axis pushes east across the area.
Building high pressure will cut off access moist northwest flow which should bring an end to rainfall tonight.
Upper level short wave trough along I-35 over Oklahoma into north Texas will continue to move northeast through the Ozarks this evening and into the Mid-Mississippi River valley Thursday morning. Cold front was located from Palestine to near Temple to north of San Angelo at 20Z. Highs will be cooler on Thursday but still slightly above normal. With return flow expected Thursday night, lows will be back in the lower 70s with clouds increasing over the inland coastal plains late at night. Cold front, moving through central Texas at this time, will enter the coastal waters this evening. Winds will turn back to onshore by mid morning on Thursday as high pressure area moves to the east.
314 PM CDT Wed Apr 26 2017 Deep upper trof will swing thru the region this evening with the cdfnt pushing sewd thru the area. Have trended temps twd the warmer guidance with clouds expected to clear out during the morning hours. Have not gone above the warmer guidance due to at least some clouds expected to spill back into the region during the afternoon.
Even though high pressure was building into the forecast area from the northwest, a couple of surface trofs were in play. Expect the short wave trof to depart the region by this evening bringing and end to the showers and storms. The high pressure moves overhead tonight. On Monday, surface and upper level ridging cover the region. Summary: The Northland can expect seasonable, or slightly cooler than normal, weather through the rest of the week.
Additional energy will eject E from the upper trough over northern California and into northern Colorado on Monday afternoon. With the front further south on Monday, expect cooler temperatures and cloudy skies over the southern counties with chances for light to moderate showers through the day.
1008 PM EDT Sun Aug 6 2017 Scattered showers and an isolated thunderstorm or two will be possible Monday as an upper level trough crosses the region and a low pressure area slides by to our south.
High pressure centered over the western Great Basin will slowly break down through Monday with increased thunderstorm activity expected across northern and central Utah. An upper low is situated across northern CA this evening, inducing southwesterly flow aloft downstream across the Great Basin. An upper jet associated with this low extends across the lower Colorado River Valley, with the nose of this feature extending downstream into far southern Utah.
Weak high pressure will keep the region mostly clear into Monday, as temperatures warm closer to normal.
Along the east coast, temps may only fall into the low 80s, tying or exceeding various high minimum record values. A strong and elongated cell of high pressure stretching from the Gulf to the western Atlantic will provide subsidence, and very warm conditions at the surface. Maximum temperatures will generally top out in the low to mid 90s, a few degrees higher than seasonal norms. Minimum temperatures will only dip into the low 80s, once again tying or potentially breaking high minimum temperatures records.
KLG Weak high pressure will keep the region mostly clear into Monday, as temperatures warm closer to normal.
An upper level ridge of high pres will keep the region in a very warm air mass through much of the week. A weak upper level low over northern California will wobble around for the next few days, teasing the Oregon Cascades with the chance of thunderstorms through mid week. Temperatures may cool down to near normal by the end of the weekend as the upper ridge moves east and a trough of lpw pressure approaches off the Pacific.
As of now, existing convection is occurring well north of the surface front, although a few cells may develop across the mid state later this afternoon, with more widespread activity developing this evening and overnight as an upper trough moves across the region.
748 PM EDT Sun Aug 6 2017 An area of low pressure will move out of the Tennessee River Valley to near Philadelphia by late Monday. High pressure will bring drier and more seasonably cool temperatures for mid week. Min temps will vary from the mid 50s NW to the low-mid 60s in the SE. Forecast storm total rainfall should stay well below even the lowest 6-hourly FFG values of 1.
932 PM CDT Sun Aug 6 2017 A warm front remains across Northeast Arkansas, the Missouri Bootheel, and Northwest Tennessee this evening. A warm front continue to move north through the region with only portions of northeast Arkansas remaining north of the boundary. The warm front will continue to move north during the remainder of the afternoon before a cold front starts to move into northwest Arkansas this evening and into central Arkansas overnight. Temperatures will be a little warmer than the last couple of night with lows Monday morning in the low to mid 70s. On Monday, the cold front will start to drop south into the forecast area reaching north Mississippi by late afternoon. Temperatures will be cooler than today with highs in the low to mid 80s.
737 PM EDT Sun Aug 6 2017 Atlantic high pressure will persist through Monday.
The National Hurricane Center has upgraded the potential tropical cyclone in the caribbean to Tropical Storm Franklin within the last few minutes.
1149 PM CDT Sun Aug 6 2017 Tonight: All will be quiet as weak high pressure that is centered over the U. Tue-Wed Night: Rain & thunderstorms will gradually increase for as the previously mentioned lower-deck high pressure continues its slow eastward trek, the moisture axis would likewise shift further east (albeit slowly). A prolonged wet period is anticipated as a weak warm front develops in an E/W manner through KS.
forecast area on the southern fridge of zonal/northwesterly flow. Upper low swirling over northern CA with a low amplitude ridge over the Desert Southwest. Therefore, temps have only reached into the lower to mid 70s over the area.
Cold front is pushing through Oklahoma and northwest Arkansas and will help keep the outflow boundary from moving much northward movement.
604 PM PDT Sun Aug 6 2017 Low pressure will bring low clouds and fog that may spread into some valleys, into Monday.
High pressure aloft will remain over the region this week, and warm weather will continue across Western Washington.
A backdoor cold front will lead to an uptrend in storm coverage and intensity east of the Central Mountain Chain today and especially Monday evening when locally heavy rainfall and flash flooding are possible.
A low pressure center will move eastward across Tn through the next 24 hours. On Monday the passage of the low and a surface front will cause winds to veer to west, then northwest.
1219 AM EDT Mon Aug 7 2017 An area of low pressure will move out of the Tennessee River Valley to near Philadelphia by late Monday. High pressure will bring drier and more seasonably cool temperatures for mid week. Min temps will vary from the mid 50s NW to the low-mid 60s in the SE. Forecast storm total rainfall should stay well below even the lowest 6-hourly FFG values of 1.
A low pressure center over Ar will move eastward across Tn through the next 24 hours. On Monday the passage of the low and a surface front will cause winds to veer to west, then northwest.
807 PM PDT Sun Aug 6 2017 A weak trough off the California Coast will give way to building high pressure over northwest Mexico this week.
926 PM EDT Sun Aug 6 2017 Crossing low pressure will return rain to the region tonight and Monday.
Low pressure will move up the Ohio Valley tonight into Monday, with a trailing upper level wave accompanying it. This will bring showers and perhaps a rumble of thunder to the area into Monday, before a several day dry spell dominates most of the week as broad high pressure settles over the lower Great Lakes. Chances for precipitation will return as the weekend approaches and weak low pressure returns to the area. Expect most of the precipitation to be ending by daybreak Monday, but with the upper level trough moving through will carry low pops for showers into midday/early afternoon. Dry weather will then dominate the remainder of the short term as broad high pressure settles into the region.
and how much lift the weak cold front (across central/southern Oklahoma) can generate.
Increasing cloudiness and moisture will keep temperatures in the mid 70s, a few degrees warmer than previous nights.
544 PM MDT Sun Aug 6 2017 A closed low pressure system currently sits over northern California this Sunday afternoon. Ahead of this system, weak ridging is evident in the 500mb pattern over central Utah.
Meanwhile, an upper low in Quebec had a strong trough extending southwest, and as this passes to our southeast, weak upper ridging will build in Monday over MN/WI. We will see dry conditions for a couple days with high pressure dropping south over the area.
Temperatures aloft are 1-3 degrees C warmer aloft on Monday, so should see temperatures warm over highs the past few days.
637 PM CDT Sun Aug 6 2017 At H5 strong closed low over the Aleutians. sharp ridge all the way into the Yukon. Quasi blocking pattern developing over the west coast. Quasi blocking pattern to the south of Greenland. These features are allowing a broad trough across the Northern CONUS. The current upper air pattern will hold through the end of the work week till it begins to transition as the upper ridge to the west begins to shift east. As a storm moves across the southern Gulf through the week upper high over northern Mexico will build and move north into the Desert Southwest allowing waves to move out of the base of the trough along the west coast and move over the central Rockies into Western Kansas.
Flat ridge remains out over the southwestern states which should keep the area in a zonal to slightly northwest upper level flow through the remainder of the forecast period.
622 PM CDT Sun Aug 6 2017 The low pressure system that created flash flooding issues last night will move off to the SE leaving a light NE wind and widespread low cloud deck overhead today. This cloud cover will help to keep temperatures even more unseasonably cool today with highs in the low to mid 70s expected. Surface ridging will build in from the north with consistent NE winds keeping the area nice and cool for early August the next few days.
954 PM EDT Sun Aug 6 2017 Atlantic high pressure will persist through Monday.
1157 PM EDT Sun Aug 6 2017 Periods of rain can be expected across the region overnight and through the day with crossing low pressure.
Current temps generally in line with forecasted lows, although it is trending that some locations might be slightly warmer than previously forecasted. A low pressure center over Ar will move eastward across Tn through the next 24 hours. On Monday the passage of the low and a surface front will cause winds to veer to west, then northwest.
On a more widespread scale we have southerly flow in place as a warm front has lifted north of the area this afternoon. Models are in good agreement and indicate the southern edge mid-level westerlies will persist over the Deep South with a broad trough east of the Rockies.
1150 PM EDT Sun Aug 6 2017 High pressure slowly shifts to our south and east overnight into Monday.
Showers and thunderstorms expected over the coming days which will also help bring slightly cooler temps. Scattered showers and thunderstorms expected over the coming days which will also help bring slightly cooler temps.
Scattered showers and isolated thunderstorms developing Monday afternoon over the higher terrain east of KMYL and Idaho City, and near the Nevada border. Upper low has come ashore in northern California.
Meanwhile the Dakotas system will continue dropping southeast and drag a weak cold front across the area during the day tomorrow. Temps will continue cooler than normal the next 24 hours with lows in the 50s to lower 60s tonight and highs in the 70s Monday.
1030 PM EDT Sun Aug 6 2017 High pressure will build into the region through Monday.
On a more widespread scale we have southerly flow in place as a warm front has lifted north of the area this afternoon. Models are in good agreement and indicate the southern edge mid-level westerlies will persist over the Deep South with a broad trough east of the Rockies. A broad upper trof axis to the north of Alabama will produce lift for convective activity thru the period.
747 PM EDT Sun Aug 6 2017 Scattered showers and an isolated thunderstorm or two will be possible Monday as an upper level trough crosses the region and a low pressure area slides by to our south.
847 PM EDT Sun Aug 6 2017 High pressure will give way to an approaching low pressure system and showers and thunderstorms late Monday into Monday night.
642 PM CDT Sun Aug 6 2017 Tonight: All will be quiet as weak high pressure that is centered over the U. Tue-Wed Night: Rain & thunderstorms will gradually increase for as the previously mentioned lower-deck high pressure continues its slow eastward trek, the moisture axis would likewise shift further east (albeit slowly). A prolonged wet period is anticipated as a weak warm front develops in an E/W manner through KS.