Aikyam-Lab/Synoptic-Bench huggingface dataset:
In the wake of the WAA thermal ridge axis will bring daytime highs, as long skies clear as expected, into the upper 80s and low 90s Monday afternoon as west winds aid in drying out dew pts and locally raising valley temps. Warmest temps should be Tue/Wed, with highs in the low to mid 80s and not much positive moisture transport limiting dewpoints only to the low 50s. A cold front/trough, still looking dry and not all that cool, is scheduled to swing through the forecast area during the late Wed/early Thu time frame. Large upper trough will move onshore of the West Coast on Fri/Sat kicking out our ridge and allowing for SW flow and increasing moisture during this time.
209 PM CDT Sun May 31 2020 High clouds were spreading into the area this afternoon ahead of a weak upper level trough over northern Mexico that will lift into the Pecos Valley/Permian Basin by late Monday. Upper level ridge will hold control again this evening with no mentionable thunder chances leading to another benign, seasonable night with fairly light winds but also periods of high clouds. RMcQueen An upper ridge will amplify over the region during the second half of the week and will likely keep conditions dry for the area.
(This evening through Monday) Little change is expected as the upper high pressure continues over Oklahoma through Monday.
Upper air analysis showed a ridge axis from north Texas to Dakotas with a broad low over northern Mexico/southern Texas. Upper level ridge axis will slowly develop from Florida to the central Plains with main ridge over the middle CONUS. Weak upper level low underneath the ridge over Texas will allow moisture to surge northwest across Texas and Southwest Louisiana with moisture pooling on over the extreme southwest portions of the forecast area Monday.
The warm advection and increasing downslope flow will lead to a gradual increase in max temps on Monday, with areas west of I-135 climbing into the the lower 90s.
High pressure will be moving eastward out of the Midwest tonight. Moisture and cloud cover will be increasing this evening as a low pressure system approaches the state. There will also be some decent low level frontogenesis with the passage of the warm front Monday afternoon.
The exit of the upper trough into the northern Rockies will nudge substantially drier air over Nevada into western/northern Utah today. The dry air mass will cover much of the forecast area as high pressure aloft expands across the southern Rockies/desert southwest early in the week. A new cut-off low centered near 30/125 will eventually draw moisture back into California and Arizona during the first half of the week.
A broad area of high pressure is dominating the eastern half of the CONUS this morning. Prior discussion below: Quiet weather will continue today as the region is between troughing to the east and ridging across the Central Plains. High temperatures will range from the lower to mid 80s in the north to the upper 80s in the south, potentially touching 90 degrees in a few spots.
954 AM MDT Sun May 31 2020 Current satellite imagery shows CU slowly starting to develop over the higher terrain with upper level flow mainly from the southwest behind the exiting trough. The air mass will be a little warmer, and surface dew points should be a bit lower but mainly just from the mixing that occurred yesterday and again this afternoon.
146 PM MDT Sun May 31 2020 19z surface analysis had lee trough from central MT to just east of KGCC to the WY/NE line. Mesoanalysis indicated 500J/kg MLCAPE with little MLCIN behind see trough. High-based convection behind lee trough will push into richer atmosphere over far northeast WY/northwest SD.
Upper level low continues to progress northward, generating isolated showers over Valley County in ID into the early afternoon. A trough will approach the region late tonight into tomorrow, spreading showers across southeast OR Monday morning and across higher elevations of southwest ID Monday afternoon.
The bigger story for today is the lower humidity thanks to the cooler/drier airmass that's advecting into the region in the wake of a recently departed cold front now well SE of the CWFA. Lows tonight will fall into the middle 50s in AL, and will dip into the lower 50s (with even a few upper 40s sneaking into the area in portions of Srn Middle TN).
Coastal trough has remained right along the coast through the day today with winds for all land locations still having a northerly component. The trough should shift farther inland during the day Monday though and could lead to increased convection along the coast. Temps warm back into the mid 80s tomorrow with lows tonight and Monday night in the lower to mid 70s.
155 PM CDT Sun May 31 2020 Dry and pleasant weather will prevail in central Illinois into Monday, as high pressure drifts across the Midwest.
339 PM EDT Sun May 31 2020 The latest surface map features high pressure centered across the southern Great Lakes region, with ridging expanded south and southeast from the center. Aloft, troughing is seen across the East and the West, with ridging found across the central CONUS. Temperatures currently range from the low to mid 70s, with dew points mainly in the 40s. The upper level ridge will broaden and nudge east, with the Ohio Valley remaining in northwest flow aloft, while 500 mb heights build in across the region.
349 PM CDT Sun May 31 2020 High pressure continues to build over the region as the upper- level ridge is currently centered over the Great Plains. The weather has been as advertised with temperatures in the low to mid 80s. Humidity is relatively comfortable, especially for this time of year with dew points only in the 50s which we can thank dry northwest flow on the downstream side of the high. The Mid-South will remain on the downstream side of the high through Monday which means we have a couple more days of temperatures in the 80s for highs, lows in the mid 50s to low 60s, and dew points in the 50s as northeast flow continues over the region.
Light rain showers will have cleared our far eastern counties around day break, with upper level ridging building over the area. The ridging in concert with southerly winds and a veering profile, will allow temperatures to soar into the upper 80s and mid 90s into the afternoon. The surface pressure gradient relaxes Monday afternoon as a cold front begins to move through, allowing the winds to decrease into the evening hours. Due to the ridge over the central plains, the front stalls resulting in another mild night for the area with lows in the mid to upper 60s.
The first bit of good news is with troughing in place over the western third of the CONUS we have near to slightly below normal high temperatures for the next couple of days along with a few mid to high level clouds making for beautiful weather in these parts. Now for the bad news middle of the sandwich, the strong ridging that brought us the hot temperatures last week and currently sitting over the south central U.
A broad trough will pull an area of moisture rich air, 95+% at 700-500mb, north over the Marble mountains. These clouds are expected to stick around today and even produce areas of drizzle along ridges and higher terrain, especially along the Cascades. Then, the thermal trough will rebuild this afternoon into Monday.
he upper level low continues to be centered to the southwest of Laredo over northern Mexico based on water vapor imagery. By Monday morning the upper low should be situated very near the Texas Big Bend putting South Central Texas in a better spot for scattered to numerous showers and thunderstorms. The low will drift slowly north Monday night before getting stuck in the broad upper level ridge encompassing much of the Southern U. With the increased cloud cover and rain around afternoon highs for today and tomorrow will be kept a few degrees below seasonal normals in the lower 80s.
Consequently, our afternoon highs will probably be a few degrees cooler than previously forecast. The upper level ridge will be centered over the plains, which means hot weather will make itself felt as highs climb to around 90 or the lower 90s.
259 PM CDT Sun May 31 2020 As a longwave trough slips east across the Mid Atlantic and New England regions, Middle TN is benefiting from the effects of an approaching high pressure system.
1147 AM EDT Sun May 31 2020 Noticeably cooler conditions will close out the month of May with below average temperatures continuing for the start of June.
For Monday, weak upper trough over Texas will lift north.
A brief cloud line did manage to develop over the Lower Keys and produced some showers.
1047 AM MDT Sun May 31 2020 16z surface analysis had lee trough from central MT into western NE. Further west MLCIN around 500J/kg with little cap later in the afternoon which will support the development of high-based convection near the higher terrain of southeast MT/northeast WY along lee trough. Current surface map places high pressure across the upper midwest/western Great Lakes with warm front across central Montana into eastern Wyoming. Large area of pressure falls across the northern plains with warm front easing eastward today. Low level temps surge upwards, with highs 15-20F warmer than yesterday. Weak cold front/wind shift slips through the area Monday, with boundary layer flow becoming easterly Monday afternoon.
/Tonight through Sunday/ Upper level synoptic pattern is highly amplified with a ridge of high pressure sandwiched between a pair of troughs along each coastline. Ridge builds further east tonight in concert with strengthening warm air advection aided by a 50+ kt LLJ.
The sprawling upper level trough will continue to push further east into the Atlantic during the near term while an upper level ridge builds into the central portion of the CONUS. An 850mb ridge is building into the Southeast and Mid South today as it slowly makes its way east toward the western Atlantic.
A large upper level ridge axis extending northward through the plains states will shift a bit eastward as heights build and the associated dome of hotter air moves back toward the area during the early portion of the week.
Upper ridge will continue to build/expand with increasing heights Monday through Monday night.
129 PM EDT Sun May 31 2020 High pressure will maintain dry and cooler than average weather through Monday.
Expect highs to reach the lower 80s in portions of eastern Kansas to the lower 70s in cloudy areas of northeast Missouri.
A cold front near the Ga-Fl line will push south of the area tonight. Showers will decrease this evening but then increase again late tonight as a ne surge behing cold front moves into se Ga. Breezy ne winds with scattered showers will prevail on Monday with cooler temperatures.
Showers linger behind the cold front that brought strong thunderstorms this morning. Widespread showers and thunderstorms return to north-central Idaho and western Montana for the end of the week and for the weekend with a trough expected on the west coast.
227 PM EDT Sun May 31 2020 Mid/upper-level troughing remains over the northern half of the state, with ridging to the south and west. At the surface, weak high pressure stretches across the region, with a weak frontal boundary found along the northern Gulf coast. For tonight, the trough aloft will shift eastward as ridging to the west amplifies.
/Issued 720 AM EDT Sun May 31 2020/ State remains under northwesterly upper flow between the east coast/western Atlantic trough and the southern plains ridge through the short-term forecast period. The upper ridge centered west of the MS River will expand across the southeast through the period.
125 PM EDT Sun May 31 2020 High pressure and a dry and cool airmass will be in place for the start of the week.
451 PM EDT Sun May 31 2020 A weak trough will bring a few showers through this evening, then Monday will be mainly dry and a bit warmer as high pressure builds across Ohio.
Temperatures will be significantly cooler for the next couple days with highs only in the 60s to lower 70s. Winds will be breezy across the Columbia Basin today with gusts of 20-35 mph but temperatures will be noticeable cooler, only topping out in the 60s to low 70s.
157 PM CDT Sun May 31 2020 An upper ridge will continue to build over the central and southern plains today leading to dry conditions but increasingly more warm and humid.
This is around a large ridge over Eastern Conus with the center over Lake Michigan. Conditions will remain rain free through the short term as the ridge slides southeast through Monday toward the Mid Atlantic Coast near Virginia and the Carolinas. Temperatures will moderate some on Monday with slightly warmer temperatures as well. /Opportunity for shower/storm activity returns after early week fair weather/ Upper-level ridging will transition to a weak upper trough signal midweek as PWAT values roughly double from BMX's Sunday morning observed value of 0.
143 PM CDT Sun May 31 2020 There will be an increase in precipitation chances early this week, mainly across west Texas, as an upper level low pressure area, centered in central Mexico, tracks north into the Permian Basin by tomorrow.
High pressure will bring cool and mostly dry weather today and tomorrow.
Mid level moisture continues to rotate into the area mentioned above after midnight around an upper level high pressure center located in southeast Kansas. As precip chances do decrease some hints from the 15z and 17z HRRR suggest a heat burst type event possibly occurring based on relative humidity values below 20 percent, weak showers and localized potentially very strong wind gusts and much warmer temperatures compared to their surroundings in or around Yuma, Dundy, Cheyenne (KS) counties. High temperatures are expected to be in the low to upper 90s.
At the surface, strong high pressure will gradually move southeastward from the Great Lakes region towards the mid-Atlantic coast. The upper ridge centered west of the MS River will expand across the southeast through the period.
The upper trough dynamics and associated upper jet kinematics is actually pretty decent. However, due to a dry and stable air column in place, it will remain dry, though a shallow mid-level moisture embedded with in the H7 trough will result in broken cloudiness through the first half of the day. A stronger, secondary surge of of cooler and drier air will advect south into the region this evening and overnight as Canadian high pressure currently over the Upper Midwest builds south into the region. Lows overnight will average 10 degrees below climo as temps bottom out into the lower to mid 50s, with some upper 40s possible in the typically cooler locations.
Later this morning or early afternoon expect smaller temperature rises as cool north winds of 10 to 15 mph bring cooler air from the north. High pressure over the region will continue to keep VFR flight rules for all sites through the next 24 hours with mostly clear skies.
135 PM CDT Sun May 31 2020 Updated for 18Z aviation discussion 18Z TAF discussion: VFR tafs through the pd under a ridge of high pressure. A broad area of high pressure is dominating the eastern half of the CONUS this morning. Prior discussion below: Quiet weather will continue today as the region is between troughing to the east and ridging across the Central Plains. High temperatures will range from the lower to mid 80s in the north to the upper 80s in the south, potentially touching 90 degrees in a few spots.
At the surface, a weak leeward trough extends from northeast WY into the NE Panhandle. A vort max tracking northeast through WY should provide enough forcing for isolated to scattered thunderstorms to develop late this afternoon across the western Panhandle near the trough. The front washes out late Monday afternoon, and with upper level ridging increasing not seeing much opportunity for thunderstorm activity during the day Monday.
249 PM EDT Sun May 31 2020 Cool Canadian high pressure sliding southeastward across Ohio will bring us clear skies, light breezes, and unseasonably chilly temperatures tonight. possibly a couple degrees cooler in the usual cold spots in the Blue Grass. So, tomorrow should only be a few degrees warmer than today.
1251 PM CDT Sun May 31 2020 The predawn hours saw some hit or miss showers/storms develop across mainly our central/eastern zones in a warm air advection regime on the nose of the low level jet. Otherwise today we'll be warming up today with rising heights as an upper ridge axis which has been oriented over the Rockies builds onto the plains. Warmer air will advect east, with H85 temps rising roughly 5C from yesterday to today. The warm airmass and steady southerly winds will hold up low temps tonight in the mid 60s which will be roughly 5 to 10 degrees warmer than the past couple of nights.
While today may be a degree or few cooler than yesterday, thanks to a NE wind, a repeat of beautiful conditions is expected. Temperatures are climbing into the low 70s already, so hourly temps were adjusted up to account for the faster trend.
1153 AM CDT Sun May 31 2020 Dry and pleasant weather will prevail in central Illinois into Monday, as high pressure drifts across the Midwest.
1130 AM MDT Sun May 31 2020 16z surface analysis had lee trough from central MT into western NE. Further west MLCIN around 500J/kg with little cap later in the afternoon which will support the development of high-based convection near the higher terrain of southeast MT/northeast WY along lee trough. Current surface map places high pressure across the upper midwest/western Great Lakes with warm front across central Montana into eastern Wyoming. Large area of pressure falls across the northern plains with warm front easing eastward today. Low level temps surge upwards, with highs 15-20F warmer than yesterday. Weak cold front/wind shift slips through the area Monday, with boundary layer flow becoming easterly Monday afternoon.
The surface front has stalled just offshore, with short term models showing coastal low pressure continuing into Monday night as high pressure builds across the eastern US. Temperatures may reach a degree or two warmer on Monday, but stay generally below normal.
340 PM CDT Sun May 31 2020 Early this afternoon an amplified upper level ridge extended northward along the high Plains.
An upper-level ridge is centered over the Great Plains - bringing northwest flow and dry air to the Mid-South. Temperatures are in the low to mid 70s with dew points in the 50s. Skies are clear which will help temperatures reach the low to mid 80s for highs. An anomalous upper-level ridge will maintain a hold on our weather pattern for a few more days, providing warm and dry weather across the Mid-South. This ridge, currently extending poleward along the spine of the Rocky Mountains will slowly shift east as the Hudson Bay trough affecting the eastern CONUS lifts northeast over the Canadian Maritimes early in the week. Trapped beneath the ridge, an upper-level low over northeast Mexico will meander over the Southern Plains for a few days but won't have much affect on our weather until closer to midweek.
102 PM EDT Sun May 31 2020 A cold front crossed the region this morning ushering in much cooler and drier air with temperatures running below normal into the first part of the work week.
RAP forecast soundings suggest that the highest potential for severe will be after about 20 or 21z to about 2 or 3z (or 2 to 9 pm).
Deep, broad southwest flow is in place across eastern Idaho around a departing through of low pressure that is lifting northeast through far northern Washington State and NW Montana this morning.
Subsidence is keeping wind light and dewpoints have dropped into the lower to mid 40's. H5 ridge will dominate over the next several days as heights rise ahead of the crest, supporting strong warm advection.
141 PM EDT Sun May 31 2020 Noticeably cooler conditions will close out the month of May with below average temperatures continuing for the start of June.
152 PM CDT Sun May 31 2020 A ridge of high pressure across the central CONUS will continue to be the main focus as we enter into the beginning of the week. Overnight lows will drop into the lower 60s, with slightly cooler temperatures in the upper 50s across the eastern Ozarks. The warming trend will continue into Monday with highs in the the lower 80s.
As the warmer 850mb to 700mb temperatures air spreads east on Monday the highs in the Hays, Larned, Pratt and Medicine lodge area are expected to climb to around 90 degrees.
202 PM EDT Sun May 31 2020 High pressure through Monday. A high pressure system will bring dry weather to the area through Monday. With light winds tonight, expect lows in the low to mid 40s, with some mid to upper 30s in the northern West Virginia mountains.
The upper trough dynamics and associated upper jet kinematics is actually pretty decent. However, due to a dry and stable air column in place, it will remain dry, though a shallow mid-level moisture embedded with in the H7 trough will result in broken cloudiness through the first half of the day. A stronger, secondary surge of of cooler and drier air will advect south into the region this evening and overnight as Canadian high pressure currently over the Upper Midwest builds south into the region. Lows overnight will average 10 degrees below climo as temps bottom out into the lower to mid 50s, with some upper 40s possible in the typically cooler locations. Dry high pressure will move overhead.
/Tonight through Monday Night/ High pressure aloft and at the surface will continue to dominate the region through this short term period. Temperatures tonight will fall into the lower to mid 60s across the region. Slightly warmer overnight temperatures Monday night with lows in the 60s.
Latest upper level analysis reveals trough off the west coast with southwest flow over the Desert Southwest. A ridge of high pressure was noted moving over the plains. Temperatures were in the mid 80s for most of the area with some low 90s in the northern FA where the thermal ridge was stronger due to proximity of upper high.
While today may be a degree or few cooler than yesterday, thanks to a NE wind, a repeat of beautiful conditions is expected. Temperatures are climbing into the low 70s already, so hourly temps were adjusted up to account for the faster trend. and beyond as high pressure maintains its control over the weather across Middle Tennessee.
Dropped lows just a degree or so, bottoming out in the lower 70s tonight.
708 PM EDT Sun May 31 2020 High pressure through Monday. A high pressure system will bring dry weather to the area through Monday. With light winds tonight, expect lows in the low to mid 40s, with some mid to upper 30s in the northern West Virginia mountains.
High pressure is centered over northern Ohio and stretching south across the Ohio Valley and into Tennessee. Overnight low temperatures will be in the upper 40s for the Plateau to the lower 50s elsewhere with clear skies.
Precipitation chances look dry for now across much of the region, but chances may increase by mid to late week as an area of low pressure may begin to influence the weather pattern more.
631 PM CDT Sun May 31 2020 A ridge of high pressure across the central CONUS will continue to be the main focus as we enter into the beginning of the week. Overnight lows will drop into the lower 60s, with slightly cooler temperatures in the upper 50s across the eastern Ozarks. The warming trend will continue into Monday with highs in the the lower 80s.
624 PM CDT Sun May 31 2020 (This evening through Monday) Little change is expected as the upper high pressure continues over Oklahoma through Monday.
1047 PM EDT Sun May 31 2020 Monday will be mainly dry and a bit warmer as high pressure builds across Ohio.
Later this evening and overnight, the low level jet will intensify over the region and the weak disturbance will shift east.
Cool Canadian high pressure sliding southeastward across Ohio will bring us clear skies, light breezes, and unseasonably chilly temperatures tonight. possibly a couple degrees cooler in the usual cold spots in the Blue Grass. So, tomorrow should only be a few degrees warmer than today.
A bit cooler out west with cloud cover being more extensive.