Aikyam-Lab/Synoptic-Bench huggingface dataset:
452 AM CST THU NOV 26 2015 A STRONG COLD FRONT WILL PASS THROUGH OKLAHOMA AND NORTH TEXAS TODAY AND OVERNIGHT. THE COLD FRONT WAS IN FAR NORTHWEST OKLAHOMA. WILL HAVE TEMPERATURE READINGS FALL BELOW FREEZING. RESULTING IN FREEZING RAIN. BUT WE CURRENTLY EXPECT FREEZING RAIN TO BE THE MAIN TYPE OF PRECIPITATION NORTHWEST OF THE FREEZING LINE. AS BRIDGES AND OVERPASSES WILL PROBABLY BECOME SLIPPERY.
/ISSUED 424 AM CST THU NOV 26 2015/ AN UPPER TROUGH OVER THE WRN CONUS WILL BECOME CUT OFF FROM THE WESTERLIES TODAY. DAYTIME TEMPS WILL REMAIN WARM TODAY AHEAD OF AN APPROACHING COLD FRONT. STRONG LARGE SCALE ASCENT FROM THE WRN CONUS TROUGH WILL ALSO SPREAD OVER THE AREA.
625 AM CST THU NOV 26 2015 NOW THAT SOME OF THE HIGHER CLOUDS HAVE CLEARED OUT OF THE NORTHWEST AND PORTIONS OF THE WEST CENTRAL IT APPEARS THERE IS A LAKE EFFECT COMPONENT TO SOME OF THE LIGHT SNOW IN ADDITION TO THE MORE WIDESPREAD FLURRIES. AT UPPER LEVELS A NORTHERN STREAM TROUGH EXTEND FROM NORTH CENTRAL CANADA TO NEAR THE MT/ND/SASK/MAN BORDER AREA. WITH UPPER LEVEL ENERGY IMPULSES MOVING NORTHEAST FROM THE LOW ACROSS THE CENTRAL/NORTHERN PLAINS. MEANWHILE THE NORTHERN STREAM TROUGH AXIS ENTERS NORTHWESTERN NORTH DAKOTA THIS AFTERNOON. TONIGHT SKIES SHOULD CLEAR FROM NORTHWEST TO SOUTHEAST AS THE UPPER LEVEL NORTHERN STREAM TROUGH AXIS MOVES THROUGH THE STATE. WENT A BIT COOLER WITH HIGHS ONLY IN THE TEENS NORTHWEST AND NORTH CENTRAL AND LOWER 20S SOUTHWEST AND SOUTH CENTRAL.
1029 AM EST THU NOV 26 2015 STRONG HIGH PRESSURE WEDGED FROM THE CENTRAL APPALACHIANS TO THE CANADIAN MARITIMES WILL MAINTAIN DRY WEATHER WITH MODERATING TEMPERATURES INTO FRIDAY.
And in some cases, the coldest since January! Dew point depressions across the area have steadily narrowed, indicating that whatever moisture is present in this relatively dry air mass is likely forming into some patches of freezing fog and/or stratus. Certainly colder than the high temperatures experienced yesterday! Tonight will yet again be very cold across the Northern Rockies with parts of southwest and west central Montana experiencing even colder conditions than those measured this morning! Needless to say, please use caution and dress appropriately should you be venturing out early Friday morning.
EXPECT A TRANSITION TO FREEZING RAIN AND OCCASIONAL SLEET AT KDHT AND KGUY. KAMA SHOULD SEE A TRANSITION TO FREEZING RAIN AND SLEET AFTER 03Z. /ISSUED 347 AM CST THU NOV 26 2015/ CANADIAN COLD FRONT HAS MOVED SOUTH TO THE CANADIAN RIVER VALLEY EARLY THIS MORNING. LEAD SHORT WAVE TROUGH MOVING THROUGH THE BROAD SOUTHWEST FLOW ALOFT HAS DEVELOPED OUR FIRST ROUND OF SHOWERS AND THUNDERSTORMS. COLD AIR DEEPENS TONIGHT AND FREEZING RAIN DEVELOPS AS THE WARM AIR OVERRIDES THE COLD DOME. ALSO WITH THE UPPER LEVEL LOW STAYING PRETTY MUCH PUT IN THE SOUTHERN GREAT BASIN.
Two significant weather concerns for late in the short term: Heavy rain potential for the northeastern counties, and an Arctic Strong upper low continues to dive southeast from Northern California toward Nevada early this morning. a major change is expected tonight as a strong Arctic cold front dives south across the area.
HIGH PRESSURE DEVELOPING TO OUR NORTH OVER SOUTHWEST CANADA AND A CUT OFF LOW OVER THE GREAT BASIN.
643 AM EST THU NOV 26 2015 HIGH PRESSURE WILL CONTINUE TO PROVIDE DRY WEATHER AND ABOVE NORMAL TEMPERATURES TODAY.
WILL SEE SPOTTY SHOWERS DEVELOP OVER THE GULF IN THE LOW LEVEL JET AND MOVE INLAND DURING THE DAY. THE AREA REMAINS BETWEEN UPPER HIGH PRESSURE TO THE EAST AND LOWER PRESSURE ACROSS THE FOUR CORNERS REGION OF NEW MEXICO/COLORADO/ARIZONA/UTAH. MID ATLANTIC HIGH PRESSURE WAS RIDGING SOUTHWESTWARD INTO OUR AREA.
255 AM PST THU NOV 26 2015 COLD AREA OF LOW PRESSURE WILL REMAIN NEARLY STATIONARY OVER THE GREAT BASIN REGION THE NEXT SEVERAL DAYS.
ADDED RIP CURRENT STATEMENT FOR HIGH RIP CURRENT RISK FOR TODAY AND TONIGHT WITH LONG PERIOD SWELLS CONTINUING TO IMPACT THE LOWER TEXAS COAST. SOME OF THE HIGHER WIND GUSTS WILL APPROACH 30 KNOTS. MID/UPPER LEVEL HIGH PRESSURE CENTERED OVER EAST CENTRAL MEXICO WILL MIGRATE EASTWARD THROUGH THE PERIOD AND BECOME CENTERED NEAR THE CENTRAL GULF BY THE END OF THE PERIOD. AT THE LOW LEVELS.
THOUGH THE LOWEST LEVELS BELOW THIS INVERSION STILL REMAIN FAIRLY SATURATED. THE AREA OF HIGH PRESSURE WILL BEGIN TO WEAKEN.
558 AM EST THU NOV 26 2015 STRONG HIGH PRESSURE OVER NOVA SCOTIA WILL MOVE SLOWLY EAST TODAY. A COLD FRONT WILL MOVE INTO NORTHERN MAINE LATE IN THE DAY FRIDAY AND SWEEP ACROSS THE DOWNEAST REGION FRIDAY EVENING.
HIGH PRESSURE AXIS PARALLELING THE US ATLANTIC COAST WILL REMAIN GENERALLY STATIONARY. SFC LOPRES TROUGH OVER CUBA WILL ALSO REMAIN IN PLACE. THIS WILL PROLONG THE HIGH RISK FOR RIP CURRENTS. STATIONARY SFC LOPRES TROUGH ALONG CUBA WILL BECOME DIFFUSE AND GRADUALLY DISSIPATE.
424 AM CST THU NOV 26 2015 AN UPPER TROUGH OVER THE WRN CONUS WILL BECOME CUT OFF FROM THE WESTERLIES TODAY. DAYTIME TEMPS WILL REMAIN WARM TODAY AHEAD OF AN APPROACHING COLD FRONT. STRONG LARGE SCALE ASCENT FROM THE WRN CONUS TROUGH WILL ALSO SPREAD OVER THE AREA.
THE AREA REMAINS BETWEEN UPPER HIGH PRESSURE TO THE EAST AND LOWER PRESSURE ACROSS THE FOUR CORNERS REGION OF NEW MEXICO/COLORADO/ARIZONA/UTAH. MID ATLANTIC HIGH PRESSURE WAS RIDGING SOUTHWESTWARD INTO OUR AREA.
946 AM EST THU NOV 26 2015 HIGH PRESSURE WILL CONTINUE TO PROVIDE DRY WEATHER AND ABOVE NORMAL TEMPERATURES TODAY.
It does appear though that the low clouds should edge into VLD over the next hour. As they have been approaching TLH, the clouds have been dissipating but with a more defined area to the east, the low clouds may still make it to TLH by mid-morning. While the low clouds should not make it to the other TAF sites, low clouds will be possible again Friday morning. Upper ridging continues to build into the CWA today.
Rain will gradually overspread the region this evening into the overnight hours a cold front begins to move to the southeast. Periods of rain, heavy at times, are expected with a sharp drop in temperatures behind the front (getting into the 30s, but staying above freezing). Conditionswill be rather raw given a stiff northerly wind and temperatures falling into the 30s (though still staying above freezing). We will need to watch the freezing line closely during this time frame as it encroaches on portions of Bourbon/Crawford counties in KS and Vernon county in MO.
739 AM EST THU NOV 26 2015 STRONG HIGH PRESSURE WEDGED FROM THE CENTRAL APPALACHIANS TO THE CANADIAN MARITIMES WILL MAINTAIN DRY WEATHER WITH MODERATING TEMPERATURES INTO FRIDAY.
429 AM CST THU NOV 26 2015 A SOUTHWESTERLY FLOW ALOFT WILL CONTINUE THROUGH THE WEEKEND AS SE TEXAS REMAINS BETWEEN AN UPPER LOW OVER THE ROCKIES AND AN UPPER LEVEL HIGH PRESSURE RIDGE OVER THE GULF OF MEXICO.
A COLD UPPER LOW WILL MEANDER AROUND THE GREAT BASIN THROUGH THE THANKSGIVING WEEKEND.
959 AM EST THU NOV 26 2015 HIGH PRESSURE OVER THE REGION WILL DRIFT EAST THROUGH FRIDAY. GIVING WAY TO A COLD FRONT LATE FRIDAY NIGHT.
SOUTH TEXAS REMAINS UNDER PARTIAL RIDGING TO THE SOUTH HOWEVER. GREATEST LIFT/OMEGA RESIDES ACROSS THE NORTHEAST TOWARD THE VICTORIA CROSSROADS WHERE CHANCE POPS WILL REMAIN THE HIGHEST.
QUIET WEATHER CONTINUES WITH A DECENT SPREAD BETWEEN VALLEYS AND RIDGES IN TEMPERATURES THIS MORNING. WITH STRONG MID/UPPER LEVEL RIDGING HOLDING OVER THE EASTERN CONUS THROUGH FRIDAY. OPTED TO CONTINUE TO FOLLOW THE WARMER MAV GUIDANCE NUMBERS FOR TEMPERATURES TODAY. LOWS TONIGHT WILL AGAIN FEATURE A STRONG RIDGE TO VALLEY SPREAD AS ANOTHER STRONG INVERSION SETS UP. WE SHOULD REMAIN ABOVE FREEZING TONIGHT WITH LOWS IN THE MID TO UPPER 30S IN THE VALLEYS AND AROUND 50 ON THE RIDGES. THEY ALL SUPPRESS A SOUTHEAST RIDGE THROUGH THE HOLIDAY WEEKEND AS A RESULT OF ONE AREA OF TROUGHING MOVING EAST THROUGH THE QUEBEC TERRITORY WHILE ANOTHER IS FOUND OVER THE CENTRAL ROCKIES.
412 AM PST THU NOV 26 2015 A STORM SYSTEM WILL REMAIN ANCHORED OVER THE GREAT BASIN THROUGH THE HOLIDAY WEEKEND AND BRING LITTLE MORE THAN ISOLATED SNOW SHOWERS TO THE HIGHER ELEVATIONS OF THE SIERRA.
541 AM EST THU NOV 26 2015 HIGH PRESSURE INTO FRIDAY WITH UNUSUALLY MILD AIR.
656 AM EST THU NOV 26 2015 HIGH PRESSURE WILL REMAINED ANCHORED TO OUR EAST TODAY AND THE SOUTHWESTERLY FLOW AROUND IT WILL WARM THINGS UP FOR THANKSGIVING DAY.
732 AM EST THU NOV 26 2015 DRY WEATHER AND WARMER TEMPERATURES CAN BE EXPECTED TODAY AND THROUGH MOST OF FRIDAY. RAIN CHANCES INCREASE FRIDAY NIGHT WITH THE PASSAGE OF A COLD FRONT. WARM AIR ADVECTION IN THE LOWER LEVELS WILL PROVIDE ABOVE NORMAL TEMPERATURES. DRY CONDITIONS AND WARMER TEMPERATURES WILL CONTINUE THROUGH FRIDAY VIA SOUTHWEST FLOW. THE EASTWARD PROGRESSION OF THE COLD FRONT CONTINUES TO SLOW AS THE EASTERN RIDGE REFUSES TO GIVE GROUND.
944 AM EST THU NOV 26 2015 STRONG HIGH PRESSURE OVER NOVA SCOTIA WILL MOVE SLOWLY EAST TODAY. A COLD FRONT WILL MOVE INTO NORTHERN MAINE LATE IN THE DAY FRIDAY AND SWEEP ACROSS THE DOWNEAST REGION FRIDAY EVENING.
A strong and shallow cold front will plunge south and east tonight into Friday across the region.
HIGH PRESSURE WILL DOMINATE AREA WEATHER THROUGH THE TAF PERIOD.
136 PM EDT WED JUN 24 2015 AN UPPER-LEVEL RIDGE ACROSS THE SOUTHERN STATES WILL HOLD ABOVE NORMAL TEMPERATURES ACROSS THE AREA THROUGH THE END OF THE WORKWEEK. COOLER TEMPERATURES AND INCREASED CHANCES FOR CONVECTION WILL ARRIVE THIS WEEKEND AS THE AN UPPER-LEVEL TROUGH DEVELOPS OVER THE EASTERN STATES. THE PERSISTENT UPPER RIDGING HAS HELPED PUSH AFTERNOON TEMPERATURES INTO THE MIDDLE AND UPPER 90S. THE LATEST ANALYSIS HAD A WEAK SURFACE HEAT TROUGH THAT SHOULD CONTINUE THROUGH TONIGHT. COVERAGE SHOULD BE LIMITED BY SOMEWHAT SHALLOW MOISTURE AND UPPER RIDGING. THE HIGH-RESOLUTION MODELS DISPLAY ISOLATED OR SCATTERED COVERAGE. UPPER LEVEL HEIGHTS ARE FORECAST TO RISE A BIT THURSDAY AS THE RIDGE BUILDS EAST. WITH A SURFACE LEE SIDE TROUGH ACROSS THE PIEDMONT. HAVE KEPT A CHANCE FOR SLOW MOVING STORMS EAST THE OF THE TROUGH.
313 PM EDT WED JUN 24 2015 A WEAK COLD FRONT WILL CROSS THE AREA TONIGHT BEFORE STALLING TO OUR SOUTH THURSDAY AND THURSDAY NIGHT.
(This afternoon through Thursday night) WV imagery shows the upper-level ridge centered just northeast of the Four Corners, whereas the westward moving trough is located over northeast Texas.
A large egg-shaped upper level low covers much of TX this afternoon with the elongated trough axis extending from near the Serranias del Burro mountains to Wrn Arkansas. The center of the upper low will drift west-southwest and tighten up as it gets just to the NW of Val Verde county by midday Thursday. By daybreak Thursday, the low level winds become more uniformly out of the SE as the upper low passes to the west. This means the low level winds will tap into deeper Pwat values pooled near the Coastal Bend.
Pattern synopsis and forecast: Northern Michigan remains centered between Intermountain West/High Plains ridge axis and northeast NOAM centered troughing early this afternoon, with resultant northwest flow and deep layer subsidence overhead. Extended area of Canadian originated high pressure building directly under this subsidence regime across the Great Lakes, the center of which is across the cold waters of Lake Superior. with current readings in the lower and middle 70s. Approach/passage of weak mid level wave dropping through northwest flow aloft will likely bring some increasing mid and upper level clouds later tonight, especially for areas south of the big bridge. Kinda expect similar temperatures to those experienced last night, with widespread readings in the lower and middle 50s, with some of our typical colder locations making a run into the 40s.
921 PM EDT Wed Jul 21 2021 An upper level trough will remain persistent over the eastern US through much of the weekend. Overnight lows will be in the low 70s.
The weak mid/upper low that has been to the southeast of the CWA was positioned more to the south of the region this evening as it slowly trekked westward across Texas. high pressure with light winds were common over the CWA underneath a hazy/smoky sky. the mid/upper low is expected to be south to southwest of the CWA by Thursday morning. lows in the low 70s are possible. With the mid/upper low more the to southwest for Thursday.
Thanks to clouds and hazy skies, this is slightly cooler than yesterday. However, the heat returns tomorrow as afternoon temperatures increase into the 80s with a few locations getting into the low 90s. As the region sits under upper-level northwesterly flow with a ridge off to the west, isolated shower chances are expected to continue through this afternoon across southeast Minnesota and northeast Iowa.
This forcing combined with a 30+ KT low level jet and theta-e ridge should be enough to increase coverage of showers and thunderstorms later tonight through early Thursday morning.
Along with the ridge in the Four Corners Region, a closed H500 low will traverse west through south Texas keeping our H500 northeasterly flow in tact through tomorrow.
The mid level upper low over Central Texas responsible for the current convection will migrate westward tonight and Thursday. Afternoon highs Thursday should reach the lower 90s in most areas.
Air Quality Alert Thursday posted due to wildfire smoke and a building upper ridge trapping particulate, preventing good dispersion, for all of NC except 5 counties in the SE corner of the state.
/issued 145 PM CDT Wed Jul 21 2021/ Upper low will continue moving westward across West Texas to near the Trans Pecos by Thursday afternoon.
823 PM EDT Wed Jul 21 2021 Convection has decreased this evening with isolated showers still possible over se Ga near troughing to the north. At 500mb the region will have an upper ridge just to the south with a trough to the north.
/22/ Scattered showers and thunderstorms slowly cropping up across the region this afternoon as a weak upper low remains over the region. Overall, heights increasing slightly as the 500 mb trough deepens over the eastern seaboard. That trough is countered by ridging in the west, leaving much of the forecast region in an area of weak flow/very little forcing. Another humid day, with heat indices pushing into the low to mid 100s in the afternoon, mainly west of I55 and south of I-20.
Another quiet day across the area with the mid-level ridge stretching from the southwest CONUS into the central Plains. The focus remains on building heat and humidity the rest of the forecast period as the ridge remains in place across the center of the country.
931 PM EDT Wed Jul 21 2021 A cold front will push south through the region late this evening.
The present synoptic setup features an upper level low over British Columbia and a broad ridge over the Four Corners region.
A broad, weak convergence zone remains parked near the HUN CWFA this afternoon; to the north, precipitable water values are ~1 inch with dew points in the mid 60s, while to the south, PWs are ~2 inches with dew points in the low-mid 70s. Model consensus actually suggest some drying in the lower and mid-levels this evening--enough for some clearing.
1140 PM EDT Wed Jul 21 2021 Drier and cooler conditions are likely to persist through Friday under building high pressure. Mainly clear skies are expected overnight under building high pressure. Included only a slight chance of a shower, with low-level ridging precluding any greater shower potential. Mainly dry weather is then expected Friday night under sfc ridging. Model ensembles indicate general broad troughing should persist across much of the ern CONUS through the period, as a ridge builds across the wrn/Central CONUS. Light-variable nwly wind and generally clear sky will be maintained overnight amid building high pressure. A crossing cold front this weekend will offer the next chance for broader flight restrictions.
202 AM EDT Thu Jul 22 2021 High pressure crosses through today into the weekend.
Canadian high pressure brought cooler and drier conditions to the area this afternoon, with temperatures in the lower to middle 70s and dew points in the 40s and 50s. Tonight into Thursday: As the Canadian high drifts east tonight, expect the front to shift back northeast as a warm front, then linger through the day on Thursday.
1054 PM CDT Wed Jul 21 2021 A ridge of high pressure will build across the Plains states through Friday. This will result in warmer lows and increasing heat during the day. This should support lows from roughly 67 to 72, with the warmer readings in southeast SD. Lows generally in the lower 70s.
Destabilization and the proximity of a mid/upper low over TX will encourage scattered thunderstorm development through the afternoon. This low will slowly retrograde today and tomorrow as it weakens in the presence of a building upper ridge across the western states. Temperatures will remain near to slightly below average today with highs in the upper 80s to low 90s and lows in the low 70s overnight. Increasing heights associated with the building ridge will encourage temperatures to climb to around average for Friday, where readings in the 90s for highs and 70s for lows will be commonplace.
(This evening through Thursday) Retrograding closed upper low passing to our south should have little impact on our weather today. Visual observations and HRRR smoke model indicate wildfire smoke moving westward across our area in tandem with the aforementioned upper low.
The position of the high pressure over the Four Corners will support an inverted trough rotating into the Southwest from the east by Thursday night. The added dynamics from this trough will interact with the already ample moisture to create a few days of widespread thunderstorms over northern Arizona and the Navajo Nation.
The upper low continues to retrograde westward through the day on Thursday, while at the same time an upper ridge begins to build over the northern Gulf of Mexico. We'll be stuck on the northern periphery of the ridge by Thursday afternoon with upper level impulses moving in from the southwest.
JB Chattanooga Airport, TN 92 70 91 71 92 / 10 10 20 0 20 Knoxville McGhee Tyson Airport, TN 90 67 92 69 93 / 10 10 10 0 20 Oak Ridge, TN 91 67 91 68 92 / 10 10 10 0 10 Tri Cities Airport, TN 88 62 90 63 91 / 0 10 10 0 20.
High temperatures in the low-90s are expected, with heat index values perhaps approaching 100 degrees. This weekend looks hot, with daily highs in the low to mid-90s and heat indices of 95-105 degrees anticipated.
Today through Friday night Closed upper low over the western portions of the Edwards Plateau today will move across the Trans Pecos region later today through tonight and Friday. Upper high over the southern Rockies and southwestern states will maintain a dry northeasterly to easterly upper flow across the Panhandles today through Friday. Upper low expected to move further west Friday and Friday night across far west Texas and southern New Mexico. The upper high is forecast to remain over Colorado back into Nevada and California.
Friday is shaping up to be potentially a critical fire weather day as well, as winds should be blustery behind the cold front, and minimum RH values could be well below those wind speeds. An approaching cold front will set off some elevated thunderstorms over the higher terrain of central MT which will track into NE Montana during the afternoon and overnight hours.
(This evening through Thursday) Late this afternoon, West Central Texas was between a large upper ridge to the northwest and a closed upper low to the southeast. Overnight, this upper low will retrograde northwestward and become more elongated as it moves over the western half of the state. By tomorrow afternoon, daytime heating and slightly better dynamics from the upper low should help to generate better chances for pulse-type showers and a few thunderstorms.
High pressure centered over central Missouri will keep the weather mostly quiet through Friday night. Trended on the cooler side of the model guidance for highs as well, but temperatures should still reach the middle to upper 80s. A warm front located across the Mid-South will attempt to lift northward towards the AR/TN border Thursday afternoon. High temperatures Friday will be a few degrees warmer, in the upper 80s to lower 90s.
302 AM EDT Thu Jul 22 2021 Dry weather is expected through Friday under building high pressure.
The area is otherwise cloud free, as farther west, fires over the western states are contributing to the smoke plume invading the northern Plains - and the monsoonal moisture from the desert southwest wraps into the four corners High pressure. Most solutions agree on a solution in the low 90s most areas. A general signal from the NAM MOS for slightly cooler low 60s westward through the Ark valley.
205 AM MDT Thu Jul 22 2021 Today and Friday, the forecast area will be sandwiched between a trough pulling across southern Canada and an upper level ridge south of the area.
Detailed Discussion A monumental high pressure sits across the central portion of the CONUS. As the high slides toward the east, southerly flow begins advecting more moist air into the region.
/issued 312 PM CDT Wed Jul 21 2021/ SHORT TERM (Tonight through Thursday Night): The 500mb low/inverted trough across west-central Texas tonight will continue to provide unsettled weather across the CWA tonight into Thursday before the 500mb ridge across the eastern Gulf of Mexico moves westward into the western Gulf of Mexico providing an increase in subsidence across south Texas Thurs night.
150 AM EDT Thu Jul 22 2021 A weak cold front will stall over southern NC this afternoon and tonight, then dissipate this weekend. High pressure over the Ohio Valley will build into our region behind the front today through Friday, then shift offshore this weekend. The dry cold front continued to slowly drift into NE NC from VA early this morning. This occurs as weak high pressure over the Ohio Valley builds in behind the front. Upper level ridge over the northern plains on Friday will weaken and shift east over the weekend. At the surface, a front will have moved to our south and a lee trough will have taken place across the Piedmont.
158 AM EDT Thu Jul 22 2021 Drier and cooler conditions are likely to persist through Friday under building high pressure. Mainly clear skies are expected overnight under building high pressure. Included only a slight chance of a shower, with low-level ridging precluding any greater shower potential. Mainly dry weather is then expected Friday night under sfc ridging. Model ensembles indicate general broad troughing should persist across much of the ern CONUS through the period, as a ridge builds across the wrn/Central CONUS. High pressure has lead to mainly clear skies into thew morning hours. A crossing cold front this weekend will offer the next chance for broader flight restrictions.
105 AM EDT Thu Jul 22 2021 Cooler and refreshingly less humid conditions will return for the remainder of the work week. High pressure will build in from the Great Lakes on Thursday, bringing plenty of sunshine, comfortable humidity, and temperatures that are a few degrees below normal. Highs will range from the low 70s across the northern mtns to the low 80s in the valleys of southern PA, and humidity will be more comfortable than it has been in some time. A warm front will slowly approach from the west beginning on Fri, bringing with it a slight chance of showers and storms to the NW.
2) Dry today and tonight with high pressure and ridging resulting in a mostly clear sky and warmer temperatures. Height rises today with mid-level subsidence on the NE periphery of a strengthening upper ridge across the Gulf Coast will result in dry weather, mostly clear sky, and increasing temperatures. High pressure with light winds and a clear sky tonight will result in continued valley fog formation along rivers and lakes.
309 AM CDT Thu Jul 22 2021 A mid level ridge remains across the southern and central Plains early this morning while a trough was located over British Columbia. The main concern continues to be building heat across the area as warm air advection will allow temperatures to warm to near normal values in the lower 90s today. Temperatures will continue to warm into the weekend with the thermal ridge spreads eastward through the Plains with temperatures warming into the mid to upper 90s and increasing humidity.