Aikyam-Lab/Synoptic-Bench huggingface dataset:
322 PM CDT Sat Sep 16 2017 A cold front raced across the local area this morning and has since stalled from eastern Nebraska into portions of central Kansas. Expect this cooler airmass to linger across the region through at least tomorrow. limiting them primarily to the eastern fringes of the local area and closer to the cold front. did trend towards the cooler side of guidance as clouds and any showers from the high plains are not expect to impact much of the local area until close to dawn.
Instability will start out pretty limited of around 1500 J/kg mainly across the eastern zones, but this is expected to change as the cold front pushes through tonight.
12 UTC surface analysis showed a high pressure area across Eastern Tennessee with northeasterly flow in place across our region.
335 PM EDT Sat Sep 16 2017 19z sfc analysis shows a moderately strong area of high pressure over eastern Kentucky this afternoon. Ridging will build through the region this weekend, though it is sort of dirty with bits of energy drifting through the higher height fields. Did make some changes to temperatures each night based on terrain anticipating a small to moderate ridge and valley split. Based on the latest model data and the current weather pattern, we should see slightly above normal temperatures with highs in the lower 80s each day and lows in the lower 60s each night.
253 PM MDT Sat Sep 16 2017 An upper level trof of low pressure will exit the region tonight.
Quick update to add isolated showers to the forecast that developed W of the ridges. Have finally started to see some isolated showers develop across the higher elevations of PA, with more coverage a bit farther east towards the central portion of the state. A persistence forecast should play out over the next 24 hours: clouds dissipate after sunset; fog develops, primarily in river valleys; a brief clear period during the morning, and diurnal cumulus forms with isolated showers in the ridges again.
420 PM MDT Sat Sep 16 2017 Main forecast issues will be the chance of precipitation followed by high cool to make the high temperatures through tomorrow. If cloud cover does not increase as fast as I think it will, the low temperatures will need to be lowered from what I have in there.
227 PM EDT Sat Sep 16 2017 A large ridge of high pressure will dominate our weather for much of the upcoming 7 days.
This convection appears to be along a surface reflection of the passing upper trough.
The fog will gradually burn off later this morning as a cold front moves across the area. This should continue for a couple more hours before a cold front sweeps through the area with northwest winds around 20kt and drier air. Expect the moisture to clear quickly later this morning as a Pacific cold front moves across the area. Expect slightly cooler temperatures overnight with lows in the mid 40s under mostly clear skies.
949 AM EDT Thu Mar 29 2018 High pressure ridging across the area will shift to the southeast through the day as a cold front approaches from the NW through tonight.
Medium A broad upper trough will move across the Upper Mississippi valley tonight and exit Wisconsin Friday morning. High pressure will move across the mid Mississippi Valley Friday with cold temperatures, but light winds.
Front then extends into Ozarks in nw AR and to 1008 mb low pressure in central TX. Low pressure to lift ne along front into the upper Ohio river valley by early evening, and likely continue rain showers east of I-55 this afternoon and early evening, then diminishing in eastern/se IL during mid/late evening. Highs this afternoon will be mostly in the lower 50s, with mid 50s in far southeast IL. a nearly stationary front draped along the Ohio River and a cold front pushing across Iowa. longwave troughing is evident over the central CONUS. High temperatures today will generally be in the lower 50s. with low temperatures dropping into the lower to middle 30s.
A quick general inch of rain will be possible in Howell/Oregon/Shannon counties and will need to monitor for heavier pockets of rain and localized flooding north of the low track today. Temperatures will dip to near or just above freezing overnight. Quiet and cooler than normal.
Winds around the periphery of high pressure off the SE coast should bring an increase in the presently meager moisture values. The High Surf Advisory will be allowed to expire at 10 AM. Mid level ridge will shift away into the Atlantic as upstream trough pushes across the Plains and into the southern states. Southeast to south low level winds will increase moisture, but influence of the ridge aloft will keep a subsidence inversion over the area and preclude any afternoon PoPs.
At many sites, the conditions may switch back and forth between IFR and almost clear several times this morning, before the lower ceiling heights finally rise mostly into the VFR category this afternoon. More sustained north winds are expected through the rest of the day, as high pressure moves in from the northwest. This is in response to an upper-level low/trough that is passing over Oklahoma from west to east.
High pressure aloft will remain near the West Coast through the end of the week. This high pressure will weaken as it enters the Great Basin this weekend. The mean long wave trough remains over the central CONUS with upper ridging dominating upstream just off the Pac coast.
A cold front currently south of CNM and HOB will continue to progress through the area this morning, accompanied by gusty northwesterly winds.
Northern Valley locations that will have breaks in the clouds and downslope warming will likely be the warmest part of the area today, with highs in the lower to mid 70s.
A cold front moves through this evening shifting winds to N to NE with SCT-BKN MVFR level clouds developing due to weak isentropic lift in its wake. Dry weather is in store for all areas today with highs in the lower 80s across the Hill Country to upper 80s across the southwest and Rio Grande Plains. Sunny skies are anticipated for Friday with high temperatures a bit cooler and ranging from the mid 70s across the Hill Country to the lower 80s across the area southwest.
1057 AM CDT Thu Mar 29 2018 A cold front currently stretches from just north of the Ohio River southwestward into North Central Arkansas. A secondary round of light to moderate rain will move into Northeast Arkansas, the Missouri Bootheel and portions of Northwest Tennessee this afternoon ahead of the cold front. This convection appears to be along a surface reflection of the passing upper trough.
740 AM EDT Thu Mar 29 2018 A longwave upper trough will move eastward into the MS Valley today. helping to push a cold front across AL into GA later today into tonight.
529 AM MDT Thu Mar 29 2018 Current surface map places weak area of high pressure across eastern Montana into the western Dakotas. with warm front lifting through western South Dakota. Low shifts into south central North Dakota Friday evening, with cold front dropping into northeast Wyoming/northwest South Dakota.
A more likely scenario produces 1 to 3 inches across this area with the highest amounts along the SD/ND border and into west central MN. Water vapor imagery this evening revealed an upper level disturbance over the northern Pacific with a highly amplified ridge further south off the west coast. This upper level wave will propagate along the outer edge of the ridge before ejecting over the northern Rockies and into the northern Plains. As this occurs lee cyclogenesis is expected in proximity to a remnant baroclinic zone in place from the Thursday night/Friday morning cold front. As the low deepens and shifts eastward overnight Friday, northerly winds are expected to increase to 15 to 25 mph with gusts 35 to 40 mph possible, especially across eastern North Dakota.
Maximum temperatures are forecast within a degree of normal this afternoon, in the low 80s. Maximum temperatures will again be similar to todays, generally in the lower 80s, typical for this time of year.
As the system exits to the northeast, a cold front will push through the region. Rain over the north will keep temperatures cool/below average today, with much warmer/above average readings across the southern counties. High pressure will build over the area on Friday, with dry conditions expected for the remainder of the near term.
Afternoon highs are expected to range from the lower 80s across Southeast Texas to the mid 70s in Acadiana.
Snow accumulations over the lower elevations through the morning will generally range from an inch or less.
An approaching cold front is generating the line of convection currently tracking across middle TN.
605 AM CDT Thu Mar 29 2018 At 3 AM, a cold front extended from Green Bay to Columbia Missouri. On Friday, a trough moves east across northeast Minnesota and Upper Michigan.
1025 AM EDT Thu Mar 29 2018 Forecast on track as warm southerly flow around Wrn Atlc ridge axis will push Max Temps into the lower to middle 80s inland while SEly sea breeze will develop along the Atlc Coast with highs in the upper 70s. Cold front approaches from the NW tonight and southerly flow will keep temps above normal in the lower to middle 60s and pre-frontal showers will push into inland portions of SE GA just before sunrise. Increasing mid-high clouds tonight ahead of approaching cold front but any pcpn chances to hold off until 15-18z time frame.
743 AM EDT Thu Mar 29 2018 Cold front working through eastern forecast area but cold air moving in behind the front is only marginal. Much cooler today with temps topping out from the lower 30s north to lower 40s south.
1000 AM EDT Thu Mar 29 2018 Cold front still stretches from the eastern Great Lakes back through the ARKLATEX. A wave, and pre frontal trough, are situated across east central MS and southern LA. Made a few tweaks to the forecast, mainly for timing of the expected pre-frontal trough/line of convection. /Issued 740 AM EDT Thu Mar 29 2018/ A longwave upper trough will move eastward into the MS Valley today. helping to push a cold front across AL into GA later today into tonight.
Still a few weak showers over the high mountains as well which will continue to fade over the next few hours. Temperatures will rebound from Thu, climbing back into the lower 60s. Late Friday night, moisture does increase from the north as an embedded trough drops out of the northern Rockies.
This should continue for a couple more hours before a cold front sweeps through the area with northwest winds around 20kt and drier air. Expect the moisture to clear quickly later this morning as a Pacific cold front moves across the area. Expect slightly cooler temperatures overnight with lows in the mid 40s under mostly clear skies.
Today will be pretty much a carbon copy of yesterday, except we could end up slightly warmer for most locations this afternoon. The thermal trough will remain in place through tonight, so we'll have one more mild night in these areas with moderate east to northeast winds.
Dry and warm conditions with light winds are expected the rest of this week as high pressure builds across the region. 900 AM temperatures are running as much as 10 degrees warmer than 24 hours ago. The 12Z 850 mb temp is a couple of degrees cooler than last evening (00Z).
However, instability with colder temperatures aloft underneath the upper low has produced an area of scattered convection which moved east along the Red River Valley and was moving across the ktxk terminal area. A weak cold front will shift winds from west to nw-n later in the day, when skies finally begin to clear.
919 AM EDT Thu Mar 29 2018 High pressure will remain over the Western Atlantic waters today into tonight keeping an easterly wind flow over South Florida along with the dry weather. Therefore, the High Surf Advisory has been cancelled for Palm Beach coastal areas. Maximum temperatures are forecast within a degree of normal this afternoon, in the low 80s. Maximum temperatures will again be similar to todays, generally in the lower 80s, typical for this time of year.
System moves quickly off to the southeast by Friday night, with very cold high pressure pushing into the northern plains.
Mostly clear skies prevail across interior Northern California as the eastern Pacific ridge remains centered just off the CA coast. 850mb temperatures are projected to reach roughly 15C this afternoon across the interior, which when mixed dry adiabatically to the surface would equate to high temperatures in the lower to mid 80s in the Valley. The ridge axis will shift overhead late Friday, with today and tomorrow expected to be the warmest days in this stretch.
It was associated with the upper low pressure trough and the surface cold front. The cold front was located over northwest AR, and it will continue to move east today and help push much of the rain to the east. Winds will also shift to the northwest behind the cold front. As the system exits to the northeast, a cold front will push through the region. Rain over the north will keep temperatures cool/below average today, with much warmer/above average readings across the southern counties. High pressure will build over the area on Friday, with dry conditions expected for the remainder of the near term.
Expecting temperatures to climb into the low to mid 40s this afternoon. Cooler temperatures are expected in eastern Montana where temperatures will climb into the mid to upper 30s. Snow accumulations over the lower elevations through the morning will generally range from an inch or less.
1144 AM EDT Wed Sep 27 2017 Dry and warm high pressure will remain across the region through Thursday. A moisture limited cold front will move through the area Thursday night, then stall just south of the area over the weekend. Above normal temperatures will cool for the end of the week behind the cold front. A broad upper ridge will remain centered west of the region with high pressure ridging into the forecast area at the surface. Ridging will promote high temperatures around 10 degrees above normal, in the low to mid 90s. For Thursday, a cold front will be approaching the region from the northwest. Highs climb into the lower 90s for most areas during Thursday afternoon.
4C, in large part due to the nearly stationary mid/upper level low over the eastern Gulf of Mexico. Ordinarily this would lead to a increased threat of stronger thunderstorms, however plenty of cloud cover streaming over South Florida from blowoff of showers/storms over the Straits of FL/Florida Keys is limiting the low level instability and could end up offsetting the increased instability aloft.
A few thunderstorms are possible over southeastern parts of central Indiana this afternoon, behind an exiting cold front. However, the main change to the weather will be cooler temperatures, especially by Thursday, when temperatures will return to seasonable.
1140 AM EDT Wed Sep 27 2017 The cold front has moved through southern IN and will continue crossing central KY this afternoon. Sloppy surface pressure pattern and a warm and humid air mass persist across the Ohio Valley, but the end of the heat wave is in sight, in the form of a strong cold front extending from the Upper Peninsula of Michigan southwest to the Texas Panhandle. Upper low moving ENE across Upper Ontario will drive that cold front SE into the Ohio Valley later today. Persistent ridging aloft will seriously limit mid-level lapse rates, so anything that does develop will be weak. Cold air advection begins in earnest tonight/Thu, and will knock temps back to near normal for this time of year, if not a couple degrees cooler.
A cold front is currently moving into Northeast Arkansas approaching the Mississippi River. A cold front currently extends from northwest Ohio through southeast Missouri and into central Texas. The cold front will move through the remainder of the forecast area tonight with little if any thunderstorm activity expected. Cooler air will start to move into the region with lows Thursday morning mainly in the 60s. High pressure will build into the central Plains on Thursday.
Otherwise, temps will be a world cooler than yesterday, with maxes in the low-mid 70s under cloudy skies for most areas. TES Latest surface analysis early this morning shows that cold front has moved well southeast of the CWA. With clouds and cold air advection today, highs will be noticeably cooler than yesterday with highs in the 70s.
Cold front currently resides across Eastern Oklahoma into North Central Texas but winds have backed around to a northeast direction in advance of the front and that will continue to be the trend through the day. /issued 304 AM CDT Wed Sep 27 2017/ Surface cold front, currently across southeast Oklahoma from McAlester to Idabel, will move south across the ArkLaTex today. Additionally, could see scattered afternoon showers and thunderstorms across central Louisiana and deep East Texas due to convergence ahead of cold front and possible weak seabreeze southerly flow interaction. Winds to become northeast behind the front with cooler airmass to advect south across the region over the next couple of days. Temperatures to be the main focus of the forecast from Thursday through the weekend as high pressure becomes firmly established across the region.
The latest upper air analysis shows the closed low over the Desert Southwest continuing to deepen. East of the low atmospheric moisture was continuing to stream northeast over the middle of the CONUS. At the surface a high pressure was over the Central High Plains. Rainfall chances extend further east across the forecast area compared to yesterday due to the ridge being pushed slightly further east.
Seasonably average temperatures are expected today with mostly clear skies, as the area continues to be under the influence of an upper level ridge. An upper level ridge over the northern Intermountain Region will maintain clear skies and near normal temperatures through Thursday.
A ridge of high pressure will be over the area the next couple of days. The next weather system will bringing cooler weather and a chance for showers.
Anticipate lows in the lower 40s. A cold front and upper trough will dive through the region Thursday. An upper level trough will dominate the weather across the Great Lakes early in the period, with cooler temperatures and a few lingering showers on Thursday night.
1211 PM EDT Wed Sep 27 2017 A few showers, mainly west, with a cold front Wednesday/Wednesday night.
644 AM CDT Wed Sep 27 2017 High pressure over the Northern and Central Plains was building eastward into the area early this morning. Temperatures as of 2 am were in the lower and middle 50s. High pressure will continue to build into the area today. Ridge of high pressure gets suppressed southward tonight as a trough of low pressure starts to drop southeast out of Canada into northern MN. Mid-level trough of low pressure and surface cold front drops southeast through the area Thursday afternoon/evening.
1030 AM EDT Wed Sep 27 2017 High pressure will give way to a mostly-dry cold-frontal passage this evening. Cooler, drier air will invade overnight, helping to maintain steep low-level lapse rates and the potential for stratocu development.
/issued 353 AM CDT Wed Sep 27 2017/ (Today and Tonight) A closed upper low will remain over the Desert Southwest through tonight, with periodic weak disturbances lifting north across the area in the flow aloft. The weak cold front that moved through the area yesterday is now just south of Interstate 10 and is expected to remain nearly stationary across this area today, then drift a little farther south overnight.
High pressure will build into eastern Washington and Oregon resulting in offshore flow and warmer temps through Thursday.
1145 AM CDT Wed Sep 27 2017 High pressure over the Northern and Central Plains was building eastward into the area early this morning. Temperatures as of 2 am were in the lower and middle 50s. High pressure will continue to build into the area today. Ridge of high pressure gets suppressed southward tonight as a trough of low pressure starts to drop southeast out of Canada into northern MN. Mid-level trough of low pressure and surface cold front drops southeast through the area Thursday afternoon/evening.
1020 AM EDT Wed Sep 27 2017 An area of high pressure will remain centered over the Appalachians today, while Tropical Storm Maria tracks northward, offshore the southern middle Atlantic coast. A dry cold front will approach from the northwest tonight, then cross central NC late Thu. Tropical cyclone Maria located east of Hatteras will continue its slow nwd drift today. Meanwhile, a narrow ridge of high pressure along the spine of the Appalachians will gradually weaken. The low level nly flow around Maria has advected a deck of stratus across the eastern third of the forecast area this morning.
629 AM MDT Wed Sep 27 2017 Current surface map shows high pressure across Wyoming into South Dakota. Upper ridge builds across the area Thursday with another warm dry day.
503 AM MDT Wed Sep 27 2017 Current surface map shows high pressure across Wyoming into South Dakota. Upper ridge builds across the area Thursday with another warm dry day.
A cold front was partially through the PAH forecast area at 08z, basically near the Ohio River.
An area of high pressure over the region this morning is producing mostly clear skies and light winds. A few observations across the region are reporting temps in the mid 30s to the lower 40s.
Other atmospheric differences include much more ridge influence today, especially evident on sounding in the form of anomalously warm 500MB temps; also low level temperatures below 700MB are 1 to 2 degrees C warmer than yesterday. This regime over the Lower MS Valley is evolving ahead of a cold front slowly sinking southeast toward the region. /BB/ Prior discussion below: Today and Tonight: Mid level ridge will remain anchored across the forecast area through tonight. Mins Thursday morning should be slightly cooler than the past few days over the far northwest.
810 AM EDT Wed Sep 27 2017 High pressure will give way to a mostly dry cold frontal passage this evening. While 850 mb temperatures will be off about a degree from previous days, a very warm start and southwesterly flow should allow for widespread mid to upper 80s ahead of the cold front. The aforementioned cold front continues to slow its progression a bit in the model solutions. Fries Cooler and drier air will rapidly advance into the area Wednesday night, quickly ending the chance of any remnant rainfall behind the cold front.
A light and dry nw flow will prevail over the area today as Maria continues drifting eastward away from NC coast while a low level trough trails S/SW down into the FL Straits. Dry air in concert with sunny skies will lead to above normal temperatures today with highs reaching the lower 90s inland and upper 80s near the coast.
An upper ridge and low level offshore flow will bring warm sunny days to Western Washington today and tomorrow.
There will be brief periods of improvement into MVFR but these are too hard to pinpoint at this time and will keep the low ceilings in place through the day. Rainfall rates have been less than impressive across the Rolling Plains early this morning as a thinning warm conveyor belt associated with an upper low departing through Ontario was shifting to the east of the CWA. Additionally, the deformation and diffluence associated with an upper low across the Desert Southwest will be far enough west to keep the primary lift over the Four Corners states.
917 AM EDT Wed Sep 27 2017 A few showers, mainly west, with a cold front Wednesday/Wednesday night.
Water vapor loop indicated an upper level low pressure system over Ontario. Upper low will continue to move northeast away from the area. Upper level ridge over western Canada will roll over the area Fri night.
Today and Tonight A cold front will remain north of the area, keeping the region under high pressure.