Aikyam-Lab/Synoptic-Bench huggingface dataset:
534 PM MDT SAT JUL 23 2016 Afternoon water vapor loop showed the CWA between a upper trough moving across the northern Rockies and another lifting northeast across the northern Great Plains/Upper Midwest.
Seems to be aided by energy pushing west into west KY about the upper ridge center over the Ohio Valley. Broad high pressure aloft extends across the Commonwealth thru the remainder of the weekend, with surface ridging underneath, effectively quashing all but isolated cells growth again tmrw and also providing another day of extreme heat/humidity. The High aloft retrogrades to the southwest U.
1015 PM EDT SAT JUL 23 2016 High pressure will build in from the west on Sunday and will shift offshore Sunday night.
Upper trough brought dry and relatively cool wx to our CWA today.
Tonight skies will clear after midnight with only some lingering debris clouds as temperatures fall into the lower 70s inland to upper 70s along the Atlantic coast.
Meanwhile, local radars are detecting scattered showers and isolated thunderstorms, with the majority of the cells on the nearshore gulf waters north of the Lower and Middle Keys, on the outer Florida Straits and 10 to 60 nm southwest through northwest of Fort Jefferson National Park. Surface wise, a broad and diffuse area of high pressure is draped across South Florida and our county warning area. A late afternoon cloud line remained just north of the Lower Keys, resulting in about an hour of -TSRA for KEY.
704 PM CDT SAT JUL 23 2016 VFR conditions and light to moderate south winds will persist under high pressure. Similar conditions are expected tomorrow with the mid to upper ridge axis remaining overhead. A cold front, however, will start to nudge into southwest KS during the late afternoon and early evening hours.
757 PM EDT SAT JUL 23 2016 A cold front will move east of the region tonight. High pressure will cross the region Sunday.
1037 PM CDT SAT JUL 23 2016 VFR conditions and light to moderate south winds will persist under high pressure. /issued 704 PM CDT SAT JUL 23 2016/ VFR conditions and light to moderate south winds will persist under high pressure. Similar conditions are expected tomorrow with the mid to upper ridge axis remaining overhead. A cold front, however, will start to nudge into southwest KS during the late afternoon and early evening hours.
Current surface map shows cold front for Sunday/Sunday night outside of the Black Hillsmoving through central South Dakota. High pressure builds into the western Dakotas overnight.
Although the lower atmosphere is fairly dry with much of this being virga, we can't rule out an isolated shower or possibly a thunderstorm from about Yellowstone County west and south.
Strong coastal jet has developed this evening due in part to warmer SSTs and strong thermal coastal/land thermal gradient earlier today.
A broad ridge of high pressure remains in place across much of the country, with a hot and humid airmass across central Indiana. This heat will last through tomorrow, before a cold front approaches the area and allows a slight cool down back toward seasonal normals and brings slightly higher thunderstorm chances to the region. 0130Z temps remained in the low to mid 80s with many locations still experiencing heat indices in the 90s courtesy of the excessive dewpoints. The forecast area largely remains under the influence of the heat ridge as 700mb temps are hovering near 12C. Question becomes how far south storms can make it against the flank of the ridge and as has occurred over the last several nights.
1255 AM EDT SUN JUL 24 2016 A cold front will move east of the region overnight. High pressure will cross the region Sunday.
805 PM EDT Sat Jul 23 2016 A weak cold front will dissipate as it drops south into the area tonight.
In the wake of that feature, we continue to watch just how much destabilization can take place in advance of an approaching cold front through the evening. Looking for a bit of a break in the action here between 3 and 5 pm, but focus then turns to incoming cold front later this evening along with another round of thunderstorms.
Multiple outflow boundaries interacting with the hot and humid conditions over the higher terrain locations of far Southeast Oklahoma and Northwest Arkansas allowed for isolated to scattered showers and thunderstorm to develop this afternoon. A persistence in expected low temperatures will again be the way to go for the CWA tonight as the ridge of high pressure dominates over the Southern Plains.
628 PM MDT SAT JUL 23 2016 So-called cold front dropping past Longmont and Greeley at this time. However there is only slight cooling aloft and the incoming air is cooler but still fairly dry at first.
1128 PM EDT SAT JUL 23 2016 A cold front will move east of the region overnight. High pressure will cross the region Sunday.
Expect this feature to continue dropping south around the periphery of a deep sprawling ridge that is centered across the southern plains states.
Mostly clear skies with above average temperatures are expected over the next several days as high pressure moves in from the east. Top of the ridge has been flattened off over the area as a trough of low pressure moves across the Pacific Northwest. Meanwhile the nose of the ridge is seen pushing back to the west over Northern Baja California and this feature will continue to remain the dominant weather feature over Southern California for the next few days.
Focus will be on the possibility of storms firing within the next few hours ahead of an advancing cold front. If storms do manage to increase to our north, these models suggest that thunderstorms may congeal into an MCS this evening, potentially impacting the highway 14 corridor, southwest Minnesota, and Iowa Great Lakes region through late evening. Cooler temperatures and lower dewpoints arrive behind the front, bringing a nice reprieve from the recent heat. Skies will be mostly clear to partly cloudy on Sunday with cooler high temperatures in the 80s.
856 PM EDT Sat Jul 23 2016 A weak cold front will dissipate as it drops south into the area tonight.
So-called cold front dropping past Longmont and Greeley at this time. However there is only slight cooling aloft and the incoming air is cooler but still fairly dry at first.
Afternoon water vapor loop showed the CWA between a upper trough moving across the northern Rockies and another lifting northeast across the northern Great Plains/Upper Midwest.
Strength of storms have been limited due to the relatively dry environment and warmer temperature aloft.
With less energy and moisture available, coverage has been less than previous days with most activity over the higher terrain this afternoon. The drying trend continues on Sunday with isolated-scattered late-day showers and thunderstorms confined mainly to the higher terrain before diminishing during the early evening hours. The dry trend will continue through the workweek as a ridge of high pressure keeps the main plume of moisture to our south. With isolated-scattered late-day showers and thunderstorms confined to the higher terrain and across the south.
A weak cold front was situated across northwestern Kansas early this afternoon.
Deep layer northwesterly flow will continue today as a fairly strong mid and upper level trough dominates the ern U. with the mean of the mid/upper level trough axis beginning to move offshore of most of the east coast by this evening.
830AM UPDATE: Changes to the forecast this morning first focused on the lower than predicted morning lows and colder start to the day. GAH PREVIOUS FORECAST: Northeast Montana will bask in the warmest day yet of the season as a large and strong upper-level ridge of high pressure allows high temperatures pushing 80 degrees surge northward along the front range and high plains regions. This will be just ahead of an approaching cold front from the west associated with a series of upper-level low pressure troughs sliding in from the Pacific NW states. Just as soon as afternoon winds pick up from the south this afternoon, a sudden shift in the winds from the west will signal the onset of the cold front around 20 to 25 mph.
The parent low pressure off central Oregon coast continues to deepen and south to southwest winds continue to generate widespread gust between 50-60 mph in Coos and Curry Counties. Strong pressure gradient wrapping around the low pressure means that valleys on the west side that are oriented SW to NE could see wind gust up to 55 mph this morning. A broad trough will settle over the Pacific NW Saturday and showers will continue through Saturday night with snow levels around 3500 feet. A deep low pressure center offshore is bringing significant wind impacts to most terminals this morning. Behind the cold front, freezing levels will drop by 2000 ft from this morning to Saturday morning.
1055 AM EDT Fri Apr 7 2017 Radar shows a little more light snow or rain will be possible over the next few hours in Russell and Washington counties in SW VA, which will be gradually pushing east as high pressure builds in from the west through the day.
718 AM EDT Fri Apr 7 2017 It will be breezy today with low pressure in the Northeast States and high pressure building across the Lower Mississippi River Valley.
High pressure ridge extended from eastern MN to eastern OK and was providing clear skies and cool temperatures. Today: High pressure will bring full sunshine to the cwa and somewhat warmer temperatures, along with rather light winds. The warmest temperatures will be found in our western cwa as winds turn southwest this afternoon, with the passage of the ridge. Tonight: The high pressure ridge will continue pushing east of the cwa allowing for backing winds to the south. This along with at least scattered mid/high level clouds, in a weak warm air advection regime, will allow for a warmer night. Minimum temperatures should range from the mid 30s east to the lower 40s west. Strong WAA will continue Saturday and have favored the high end of temperature guidance, especially in the far west/southwest where 850mb temps will approach 15C.
915 AM EDT Fri Apr 7 2017 Low pressure over northeastern New York this morning will gradually weaken today through Saturday as it moves slowly northeast along the St Lawrence Valley.
/Pelatti 12Z TAFS: A deep low pressure system will continue to spread light to moderate rain through 14-16z over NE WA/N Idaho followed by gusty winds and thunderstorms for late this morning and afternoon.
A quiet morning ahead with light winds and only a few high cirrus with high pressure in control. /issued 409 AM CDT Fri Apr 7 2017/ SHORT TERM (Now through Saturday): High pressure over East Texas will shift east, ahead of mid level ridging emerging over the High Plains. Pressure falls over the plains as ridging moves out will support a mild tightening of the local pressure gradient and thus moderate southeast winds through the short term. High temperatures will be in the lower to mid 80s today, and slightly warmer on Saturday, especially over the Upper Valley where it will be in the upper 80s Saturday afternoon.
A cold front will move through the region Saturday, with showers and a threat of afternoon thunderstorms.
As a lee side trough deepens, expect southerly winds to increase to around 15 knots with gusts over 25 knots by 16z Saturday. /ISSUED 346 AM CDT Fri Apr 7 2017/ The upper level pattern across the CONUS consists of an upper trough along both the East and West Coasts, separated by a dominant ridge over the Plains.
937 AM PDT Fri Apr 7 2017 A fair but cooler day today will be the prelude to a weak storm system moving through Southern California tonight and Saturday.
1058 AM EDT Fri Apr 7 2017 High pressure has settled into the Mississippi River Valley, spilling south as a large mid latitude cyclone concedes real estate across the northeast United States. The surface gradient has tightened across the Florida Keys behind a cold frontal passage last evening, driving fresh northerly breezes through much of the island chain and area coastal waters. Enjoy this late season cold front, because the next one may not be until October.
735 AM EDT Fri Apr 7 2017 A strong low pressure system over the Northeast U.
12Z TAFS The upper level trough will translate east today.
A ridge of high pressure will move from the Mississippi Valley to the Ohio and Tennessee Valleys during the forecast period.
732 AM EDT Fri Apr 7 2017 Low pressure over northeastern New York this morning will gradually weaken today through Saturday as it moves slowly northeast along the St Lawrence Valley.
601 AM CDT Fri Apr 7 2017 Deep northwest flow continues aloft across the eastern half or so of the United States this morning, as a large upper level low spins over upstate New York. At the surface, high pressure is settling southeast into the Ozarks. Clear skies and light winds will allow temperatures to fall into the mid 30s by daybreak, with some of the lower lying areas/valleys perhaps approaching the freezing mark. This persistent southerly breeze will keep temperatures on the warmer side tonight, with lows expected to range from the mid 40s east to low to mid 50s west.
The parent low pressure off central Oregon coast continues to deepen and south to southwest winds continue to generate widespread gust between 50-60 mph in Coos and Curry Counties. Strong pressure gradient wrapping around the low pressure means that valleys on the west side that are oriented SW to NE could see wind gust up to 55 mph this morning. A broad trough will settle over the Pacific NW Saturday and showers will continue through Saturday night with snow levels around 3500 feet.
1012 AM EDT Fri Apr 7 2017 An upper trough will move to the east today. Satellite shows clearing spreading from the northwest ahead of building high pressure and anticyclonic flow. Temperatures will be cooler across eastern portions of the forecast area today where cloud cover will linger longer. As high pressure builds into the region expect cloud cover to diminish and winds to decrease. Went with a freeze warning across the eastern half of the area where there is more confidence in less cloud cover and cooler temperatures. With the potential for some clouds to move in later into western portions of the area went slightly warmer with temperatures for now and went with a frost advisory. Ridging aloft and southerly low level flow will result in warming with dry conditions early in the period.
A strong low pressure center is centered approximately 140 miles off the coast of northern Oregon and southern Washington. This low will continue to bring a strong pressure gradient across the area today as it moves north. A showery pattern is expected today and tonight as the low moves north and an upper trough moves into the area late tonight. However, with a trough over the area and as an area of instability moves inland, expect widespread showers to develop late Saturday morning and Saturday afternoon as well a slight chance of thunderstorms. A deep low pressure center offshore is bringing significant wind impacts to most terminals this morning. Behind the cold front, freezing levels will drop by 2000 ft from this morning to Saturday morning.
1124 AM EDT Fri Apr 7 2017 Low pressure over New York will slowly move northeast today. A ridge of high pressure will shift east across the region Saturday. A ridge of high pressure will push east across the area late tonight and Saturday providing dry wx and allowing temps to moderate back close to normal for all but NW PA where upper 40s will probably be as good as it gets.
921 AM MST Fri Apr 7 2017 A Pacific low pressure system and associated front will swing into the western states this weekend resulting in strengthening winds on Friday and especially Saturday. Precipitation chances will be focused across the northern half of Arizona, and will be minimal across the lower deserts.
1051 AM EDT Fri Apr 7 2017 Snow showers will taper off this afternoon, ending last in the high terrain. High pressure will build overhead through the weekend, bringing the return of dry and seasonable conditions. Will maintain snow shower chances through the afternoon, with the best chance for additional accumulation in the ridges, albeit mainly on grassy surfaces. Upslope snow will end this evening as high pressure builds at the surface and aloft. Radiational cooling will support below average temperatures, especially in the ridges where there will be fresh snow cover. Upper level ridge will settle overhead through the start of the week with dry conditions expected.
1049 AM EDT Fri Apr 7 2017 As low pressure moves north of New England, a trailing weak low pressure trough will move across today.
Expect northerly flow to continue to slacken through the day, but high pressure will keep skies clear aside from some passing thin wisps of cirrus. Wl remain under northwest flow aloft through tonight but the large amplitude upper level trough that has been over the region this week will be shifting east today.
A tight pressure gradient between the high and low pressure over the northeastern states will maintain a breezy northwest to northerly wind flow over the region the remainder of today. Lighter winds and lower seas are forecast for the upcoming weekend as high pressure settles in over the region.
1058 AM EDT Fri Apr 7 2017 Gusty west winds will continue today as strong low pressure lingers over the northeastern United States. Temperatures will average below normal through Saturday as high pressure builds in from the northwest.
721 AM EDT Fri Apr 7 2017 Aviation Drier and warmer weather is expected today with highs around 50.
604 AM CDT Fri Apr 7 2017 High pressure will dominate through the period with widespread VFR conditions expected. Water vapor imagery this morning shows a large and deep upper level trough over the northeast quadrant of the nation and continuing to move off to the northeast. Speaking of surface observations, temperatures are still generally in the 40s across the area although its likely some upper 30s are occurring in the higher terrain and normally colder locations. Otherwise, high pressure both on the surface and aloft will build into the area and dominate through the short term period resulting in generally clear skies and dry conditions. Northwest flow will keep temperatures slightly cooler than normal today but southerly flow returns Saturday and temperatures will rebound accordingly.
A strong Pacific storm will continue to move onto the West Coast as an upper ridge axis builds across the Central Plains.
1034 AM CDT Fri Apr 7 2017 High pressure at sfc and aloft resulting in lgt northerly winds over eastern sections of area, and lgt se winds over western sections. Current 10 am temps are mainly in the lower to mid 60s and with an expected 10 to 15 degree rise, aftn highs of mid to upper 70s can be expected. High pressure is sprawled all over the area this morning with only a single mb difference from Tyler to Monroe where pressure is the highest rounding up to 1024mb. Much less wind than we have seen here lately to say the least with the high pressure air mass to continue to drift Eastward.
A Pacific low pressure system and associated front will swing into the western states this weekend resulting in strengthening winds on Friday and especially Saturday. Precipitation chances will be focused across the northern half of Arizona, and will be minimal across the lower deserts.
719 AM EDT Fri Apr 7 2017 Low pressure over New York will slowly move northeast today. A ridge of high pressure will shift east across the region Saturday. A ridge of high pressure will push east across the area late tonight and Saturday providing dry wx and allowing temps to moderate back close to normal for all but NW PA where upper 40s will probably be as good as it gets.
JW 12Z TAFS: A deep low pressure system will continue to spread light to moderate rain through 14-16z over NE WA/N Idaho followed by gusty winds and thunderstorms for late this morning and afternoon.
944 AM PDT MON SEP 5 2016 A warming trend is expected through the middle of the week as a deep trough of low pressure weakens and moves east. A trough will bottom out across southern California today before shifting east tonight and Tuesday.
745 AM EDT Mon Sep 5 2016 High pressure will provide mostly dry weather and a warming trend through midweek. High pressure should maintain dry weather and mostly clear skies through tonight. As the 500 mb ridge axis continues its slow march south, Tuesday will again feature plenty of sunshine and even warmer temperatures as 850 mb temps nudge upward. A few high clouds may spill over the ridge starting during the afternoon and continuing during the night.
538 AM MDT MON SEP 5 2016 Water vapor shows deep upper trof over the wrn conus with main low over swrn MT. Additional shra/tsra development expected this aftn as atmos destabilizes and more energy aloft rotates around the main upper low over MT.
Warmer and more humid conditions are expected this week. Thunderstorm chances will be increasing late week and into the weekend ahead of an advancing cold front. After the front moves through, cooler temperatures will return late in the weekend. Much warmer start to the morning than the previous few days with 14Z temps already into the 70s.
With western portions of mid state on fringe of ridging influences, some sct cu could develop CKV/BNA. Otherwise, with broad surface and upper level ridging influences, can not rule out some passing clouds here and there, but overall SKC conditions are expected remainder of state/ CSV. With surface ridging influences sliding eastward, light southerly surface winds thru 06/12Z are expected also.
/issued 321 AM CDT MON SEP 5 2016/ A complex pattern exists over the eastern CONUS this morning with a cut-0ff cyclone over the Mid-Atlantic states merging with Post- Tropical Cyclone Hermine. A sharp mid/upper-level ridge has build on the western flank of this storm, extending north across the eastern Great Lakes. As Hermine moves slowly east, we'll see the subtropical ridge expand over the Mid-South. Coverage should remain limited, and like yesterday, shouldn't prevent temperatures from warming into the lower 90s. The combination of the dry air to the east and the large-scale subsidence associated with the upper-level ridge should limit rain chances a bit as we move into the mid-week period.
The dry northerly flow will remain in place across the Southern Appalachians due to the presence of the deep Western Atlantic low and the major league high over the Lower Mississippi Valley. Subsidence within the influence of the ridge and nearly full sunshine will help boost max temperatures well above normal. Highs will range from the mid to upper 80s across Southwest Virginia and Northeast Tennessee to the lower and middle 90s across much of the rest of the MRX forecast area. Chattanooga Airport, TN 93 67 93 68 / 10 0 0 0 Knoxville McGhee Tyson Airport, TN 91 64 91 66 / 10 0 0 0 Oak Ridge, TN 92 65 92 67 / 10 0 0 0 Tri Cities Airport, TN 88 59 89 60 / 10 0 0 0.
Low overcast, NE winds and an upper low moving overhead will keep this in check. However, narrowing dew point depressions over the last several hours is indicative of the low level moistening that has taken place. Drier weather and milder temperatures are expected on Tuesday with high pressure over the area.
/issued 322 AM CDT MON SEP 5 2016/ Little change in the weather from yesterday as the region remains positioned between western troughing and an upper level ridge centered across the lower Mississippi River Valley.
923 AM MDT MON SEP 5 2016 Updated to increase morning wind speeds over the higher terrain. Northern stream upper trough across ID/Wrn MT will eject to the northeast today while more energy drops into the mean trof across the western U. however as the upper trof edges eastward tonight. approaching trof out west may spread isolated showers and embedded thunderstorms into the southwest mountains overnight. Temperatures should be mild again for most areas with lee troffing supporting enhanced south/southwesterly downslope winds for the southeast plains.
1015 AM EDT Mon Sep 5 2016 Post Tropical Cyclone Hermine is positioned approximately 350 miles east of Ocean City Maryland, and will continue to impact the coastal northeast U.