Aikyam-Lab/Synoptic-Bench huggingface dataset:
327 PM EDT FRI MAY 22 2015 HIGH PRESSURE RIDGING HAS TAKEN HOLD OF THE OHIO RIVER VALLEY TODAY. EXPECT IT TO FIZZLE OUT UNDER THE PRESENCE OF THE STRONG RIDGING. BUT MAINLY IN CONJUNCTION WITH THE DYING UPPER LEVEL WAVE AND GENERALLY OF THE HIGH CIRRUS/STRATO VARIETY. OTHER THAN THE HIGH CLOUD COVER. STILL LOOKING A DECENT RIDGE VALLEY SPLIT BOTH TONIGHT AND TOMORROW NIGHT. WITH TEMPERATURES INCREASING FROM THE 40S OVERNIGHT TO THE LOW TO MID 50S BY TOMORROW NIGHT.
209 PM EDT FRI MAY 22 2015 HIGH PRESSURE WILL BUILD IN FROM THE MIDWEST AND BRING OVERALL PLEASANT WEATHER TO THE REGION THROUGH THE HOLIDAY WEEKEND.
BUT GOOD HEATING SHOULD ALLOW FOR THE HIGH TO REACH THE LOW TO MID 70S BY LATE THIS AFTERNOON. THE LOW RH VALUES IN THE 30S AND 40S HAVE THIS DAY FEELING MORE LIKE THE FALL THAN THE LATE SPRING.
/ISSUED 620 AM CDT FRI MAY 22 2015/ CANADIAN HIGH PRESSURE OVER THE MID SOUTH THIS MORNING HAS RESULTED IN CLEAR SKIES. HIGH PRESSURE WILL MOVE EAST TODAY WITH A RETURN OF SOUTHEASTERLY LOW LEVEL FLOW. DRY CONDITIONS WILL CONTINUE WITH A WARM UP IN TEMPERATURES BACK INTO THE LOWER AND MIDDLE 70S. UPPER LEVEL RIDGING SHOULD REMAIN IN PLACE ACROSS THE FORECAST AREA INTO SATURDAY WITH SOUTHERLY FLOW BRINGING A SLOW INCREASE IN LOW LEVEL HUMIDITY LEVELS AND TEMPERATURES RETURNING BACK TO SEASONAL NORMALS IN THE LOWER 80S. THE PATTERN WILL SHIFT BY THE END OF THE WEEKEND AS AN UPPER LEVEL LOW PRESSURE SYSTEM DIGS ACROSS THE SOUTHWESTERN U.
TEMPERATURES ACROSS THE CWFA AT 2 PM WERE IN THE 70 TO 76 DEGREE RANGE WITH DEW POINT TEMPS IN THE LOW 30S TO MID 40S. AS HIGH PRESSURE MOVES OFF TO THE EAST AND A LOW PRESSURE SYSTEM DEVELOPS IN THE CENTRAL PLAINS. OVERNIGHT LOWS WILL BE ABOUT 10 DEGREES WARMER THAN THOSE THIS MORNING. HIGHS SATURDAY WILL BE IN THE LOW 70S WEST.
Temperatures, however, will be a little warmer today, with highs mainly in the lower and middle 70s. The upper trough will be over the Four Corners region tonight and will begin moving slowly east towards the area into Saturday. A warm front will lift north across the area later this evening, with earnest moisture return expected across the area overnight as a strong low level jet develops. (Saturday through Friday) An upper trough over the Southwest U.
348 PM EDT FRI MAY 22 2015 NO MAJOR WEATHER SYSTEMS WILL AFFECT OUR REGION FOR THE NEXT SEVERAL DAYS AS HIGH PRESSURE OFF THE MIDDLE ATLANTIC COAST STAYS IN CONTROL OF OUR WEATHER.
LIFE-THREATENING RIP CURRENTS DEVELOPING ATLANTIC BEACHES THIS THE WEATHER ELEMENT HAVING POTENTIALLY THE HIGHEST IMPACT ACROSS OUR SERVICE AREA THROUGH THE HOLIDAY WEEKEND WILL BE AN EAST WIND.
FOR 18Z AVIATION DISCUSSION BELOW A QUIET SHORT TERM FORECAST WITH EXPANSIVE HIGH PRESSURE DOMINATING THE WEATHER CONDITIONS THROUGH TONIGHT. HIGH TEMPERATURES STILL LOOK ON TRACK TO BEING A COUPLE DEGREES WARMER THAN YESTERDAY. WHICH WOULD YIELD TEMPS IN THE LOW TO MID 70S. WITH DEW POINTS IN TO THE LOW TO MID 30S BY THE AFTERNOON. LOW TEMPS TONIGHT SHOULD BE A COUPLE DEGREES WARMER THAN LAST NIGHT. MAINLY DUE IN THE SYNOPTIC SCALE TO A LARGE DOME OF HIGH PRESSURE SETTING UP OVER THE SERN CONUS. THIS LOW PRES SYSTEM LIFTS INTO THE GREAT LAKES BY TUE MRNG.
233 PM EDT FRI MAY 22 2015 A COLD FRONT WILL EXIT THE NEW ENGLAND COASTLINE THIS EVENING.
MOISTURE PUSH IS DRIVEN BY A SLOW-MOVING UPPER-LEVEL LOW PRESSURE AREA PRESENTLY CENTERED AT THE CA/NV/AZ BORDER.
HAVE MADE SOME TWEAKS TO THE HIGH TEMPERATURES. THE HIGH CLOUDS WILL BE THICKENING UP DURING THE AFTERNOON. NUDGED HIGHS UP SLIGHTLY TODAY INTO THE MID 70S ACROSS MUCH OF THE AREA WITH AREAS FROM I-74 NE SLIGHTLY COOLER. HIGH PRESSURE DRIFTS SE FROM LAKE SUPERIOR INTO THE MID ATLANTIC STATES SATURDAY WHILE UPPER LEVEL RIDGE NOSES INTO THE MS RIVER VALLEY. LOWS TONIGHT IN THE LOW TO MID 50S WITH HIGHS SAT IN THE MID TO UPPER 70S.
THIS EVENING THROUGH SATURDAY NIGHT THE UPPER LOW CURRENTLY LOCATED OVER THE SWRN CONUS WILL CONTINUE TO AFFECT THE WEATHER OVER THE FORECAST AREA THROUGH THE WEEKEND. 12Z SOUNDINGS AND MODEL FORECASTS INDICATE A 110KT 300MB JET STREAK ROUNDING THE UPPER LOW WILL MOVE NORTHWARD TOWARD THE FORECAST AREA TONIGHT.
HIGH PRESSURE WAS CENTERED OVER WESTERN KENTUCKY THIS AFTERNOON. THIS HIGH WILL MOVE EAST OF THE REGION TONIGHT. WINDS WILL START TO BECOME MORE SOUTHERLY WHICH WILL BRING WARMER AND MORE HUMID AIR INTO THE REGION. TEMPERATURES WILL BE CLOSER TO NORMAL LEVELS WITH HIGHS MAINLY IN THE LOWER 80S. BY SATURDAY NIGHT A WARM FRONT WILL START TO LIFT NORTH THROUGH THE SOUTHERN PLAINS AND MUCH OF ARKANSAS. SOME THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD OF THE WARM FRONT AND SOME OF THIS ACTIVITY MAY REACH WESTERN SECTIONS OF THE FORECAST AREA.
The deep moisture plume will edge eastward on the eastern periphery of the western trough.
TEMPS WILL INITIALLY BE COOL AGAIN TONIGHT /ABOUT 5-7 DEGREES BELOW NORM/ THEN MODERATE BACK TO NEAR NORMAL SATURDAY AND SATURDAY NIGHT AS THE UPPER RIDGE IS PROGGED TO AMPLIFY ACROSS THE SOUTHEAST CONUS. THE RIDGE AXIS AND ENHANCED MOISTURE STAYS WEST OF THE AREA ALLOWING FOR THIS ATYPICALLY NICE LATE MAY PERIOD.
KEEPING HIGH TEMPS A FEW DEGREES COOLER THAN THE NORTHEAST CWA. ADDITIONAL POPS ARE THEN FORECAST SATURDAY AS ENERGY KICKS OUT AHEAD OF THE MAIN UPPER LOW.
CURRENT WATER VAPOR IMAGERY AND RAP UPPER AIR ANALYSIS INDICATES A CLOSED LOW ACROSS THE DESERT SOUTHWEST WITH A RIDGE DEVELOPING ACROSS THE MID-MISSISSIPPI RIVER VALLEY INTO THE NORTHERN PLAINS. THE HIGH PRESSURE CENTER IS LOCATED JUST TO THE NORTHWEST OF THE FORECAST AREA. UPPER LEVEL HEIGHTS WILL RISE AND EXPECT TEMPERATURES WILL BE A GOOD 5 TO 10 DEGREES WARMER THAN LAST NIGHT. THE HEART OF THE UPPER LEVEL RIDGE WILL MOVE OVER THE FORECAST AREA ON SATURDAY WITH ANTI- CYCLONIC FLOW ALOFT. HIGH TEMPERATURES WILL ALSO BE A GOOD 5 TO 10 DEGREES WARMER THAN TODAY WITH INCREASING HEIGHTS ALOFT AND PLENTY OF INSOLATION.
204 PM EDT FRI MAY 22 2015 HIGH PRESSURE TAKES CONTROL TONIGHT. WEAK COLD FRONT IS WILL MOVE OVER THE AREA THIS EVENING AND WASH OUT. COOL DRY HIGH PRESSURE THEN BUILDS IN OVERNIGHT TONIGHT. THIS HIGH PRESSURE WILL MODERATE AND BRING DRY AND WARMER WEATHER IN FOR THE MEMORIAL DAY WEEKEND. HIGH PRESSURE FIRMLY IN CONTROL FOR THE WEEKEND. AS THE HIGH DRIFTS TO THE EAST. DIRTY RIDGE TAKING OVER. VFR CONDITIONS WILL PREVAIL THROUGH THE FORECAST PERIOD AS WEAK COLD FRONT WASHES OUT OVER THE AREA AND HIGH PRESSURE TAKES CONTROL. SOME VFR CLOUDS MAY BE ASSOCIATED WITH THE COLD FRONT BEFORE IT DISSIPATES.
257 PM MST FRI MAY 22 2015 A FAIRLY STRONG UPPER LEVEL LOW WILL AFFECT THE REGION TODAY INTO EARLY SATURDAY BRINGING COOLER TEMPERATURES.
Large scale upper flow this afternoon showing a well-defined upper low spinning across the Desert Southwest with a beautiful plume of Pacific moisture enroute to the Southern Plains per latest water vapor and experimental layered precipitable water product imagery (http://cat. downstream ridging is expected to strengthen across the American Southeast. Concerns really begin to rise Saturday night as models show a weak warm front lifting through the area along with a strengthening low- level jet. the stagnant upper-level pattern will be well in place across the Lower 48 and moisture advection from the Gulf will increase through the period.
IN ITS WAKE, A COOL AND MOIST AIRMASS CONTINUED WITH TEMPERATURES STUCK IN THE LOWER TO MID 50S.
409 PM CDT FRI MAY 22 2015 A MID/UPPER LEVEL RIDGE HAS SETTLED OVER THE LOWER MISSISSIPPI VALLEY BETWEEN TROUGHS NEAR THE PACIFIC COAST OF MEXICO AND THE EAST COAST. A 1025 MB HIGH WAS CENTERED OVER THE MID MISSISSIPPI AND LOWER OHIO VALLEY WITH SURFACE PRESSURE VALUES OF ABOUT 1021 MB OVER THE FORECAST AREA WITH TEMPERATURES IN THE UPPER 70S IN THE LOWER 80S AND DEWPOINTS IN THE 60S. THE HIGH PRESSURE AREA WILL SHIFT EAST ON SATURDAY RESULTING IN RETURN FLOW WITH SOUTHEAST WINDS AND GRADUALLY RISING DEWPOINTS AND LOW LEVEL MOISTURE.
612 PM EDT FRI MAY 22 2015 A DRY COLD FRONT WILL MOVE ACROSS THE REGION LATE TONIGHT.
A PACIFIC UPPER LOW IS SITUATED OVER GREAT BASIN AREA THIS AFTERNOON WHILE WARM AIR ADVECTION SOUTH OF A LIFTING WARM FRONT HAS ALLOWED FOR TEMPS THIS AFTERNOON TO CLIMB INTO THE 60S DESPITE THE STUBBORN STRATUS DECK OVERHEAD. AS THE UPPER LOW SLOWLY MOVES EASTWARD INTO THE FOUR CORNERS REGION LATE TONIGHT. IN ADDITION THE DEVELOPMENT OF THE LOW LEVEL JET OVER THE SOUTHERN PLAINS PROVIDES ADDITIONAL LOW LEVEL WARM AIR AND MOISTURE ADVECTION FOR CONVECTION TO DEVELOP AND INCREASE IN COVERAGE LATE TONIGHT. DEEPLY VEERING WIND PROFILES AHEAD OF THE UPPER LOW CAN GENERATE A FEW STRONG TO SEVERE STORMS WHERE STRONG WINDS AND LARGE HAIL WILL BE THE MAIN HAZARDS. HOWEVER THE UPPER LOW WILL STILL BE POSITIONED OVER THE FOUR CORNERS REGION SO STORMS CAN RE-FIRE LATER IN THE DAY.
154 PM EDT FRI MAY 22 2015 AVIATION HIGH PRESSURE WILL BRING COOL AND DRY WEATHER TODAY AND SATURDAY.
CONVECTION THAT HAS BEEN FORMING IN THE WARM AIR ON THE SOUTH SIDE OF THE PALMER DIVIDE HAS BEEN WEAKENING AS IT PROGRESSES INTO THE COOLER AIR PRESENT OVER THE NORTHERN SIDE OF THE DIVIDE. THE MAIN UPPER LEVEL LOW WHICH IS CURRENTLY OVER ARIZONA WILL BE EJECTING OVER WESTERN COLORADO TOMORROW AFTERNOON. SHOWERS AND THUNDERSTORMS CONTINUE ACROSS NORTH CENTRAL AND NORTHEASTERN COLORADO SATURDAY NIGHT AS THE UPPER LEVEL LOW MOVES ACROSS THE STATE.
THE LOW STRATUS WL DISSIPATE THRU THE MORNING HOURS SAT. LARGE UPPER LOW PRESSURE SYSTEM NOW MOVING INTO THE DESERT SW WILL CONTINUE MOVING NE AND WILL BE IN NE CO SAT NIGHT.
253 PM EDT FRI MAY 22 2015 A COLD FRONT WILL CROSS THE AREA THIS EVENING WITH HIGH PRESSURE BUILDING OVERHEAD LATE TONIGHT AND SATURDAY. TEMPERATURES WILL BE NOTICEABLY BELOW NORMAL WITH SOME FROST POSSIBLE IN THE HIGHER TERRAIN WELL NORTH AND WEST OF THE METRO.
234 PM EDT FRI MAY 22 2015 A DRY COLD FRONT WILL MOVE ACROSS THE REGION LATE TONIGHT.
IN ITS WAKE, A COOL AND MOIST AIRMASS CONTINUED WITH TEMPERATURES STUCK IN THE LOWER TO MID 50S. THE UPPER LOW OVER THE SOUTHWEST U.
345 PM CDT FRI MAY 22 2015 WARM FRONT ACROSS NORTH TX WITH PERSISTENT UPGLIDE NORTH OF THE BOUNDARY PER AREA VAD WIND DATA HAS MAINTAINED CONVECTION ALONG AND NORTH OF THE RED RIVER TODAY. THE LOW LEVEL FLOW THEN FOCUSES ACROSS THE WESTERN HIGH PLAINS TONIGHT AS THE WARM FRONT LIFTS NORTHWARD SHIFTING HIGH PRECIP CHANCES NORTHWARD OVERNIGHT. CONVECTION WILL THEN FOCUS WELL WEST OF THE FORECAST AREA FOR MUCH OF THE DAY ON SATURDAY WITH MORE SCATTERED ACTIVITY THIS FAR EAST ALONG THE WARM FRONTAL ZONE.
SHORT TERM RIDGING WITH COLD CORE UPPER LOW OVER QUEBEC AND BROAD TROUGH MOVING INTO THE SOUTHLAND AND SOUTHWEST U. WE WILL INITIALLY BE UNDER RIDGING AND RELATIVELY DRY AIRMASS. WITH UPPER LOW SLOWLY MOVING NORTHEAST AND EVOLVING INTO MORE OF AN OPEN WAVE TOWARDS END OF HOLIDAY WEEKEND. ESPECIALLY JUST SOUTH OF THE AREA SETTING UP A CAPE GRADIENT OR WARM FRONT.
700 PM EDT FRI MAY 22 2015 HIGH PRESSURE WILL INITIALLY USHER IN UNSEASONABLY COOL TEMPERATURES FRIDAY NIGHT. TEMPERATURES QUICKLY MODERATE THROUGH THE WEEKEND AS THE HIGH SHIFTS EAST OF THE AREA AND THE WIND BECOMES SOUTHERLY. IT APPEARS THAT THIS CLOUD COVER WILL SPREAD OVER MUCH OF THE REGION FOR A FEW HOURS TONIGHT AND COULD KEEP TEMPERATURES A COUPLE DEGREES WARMER. LOCATIONS CLOSEST TO THE LAKE WILL BE SLIGHTLY WARMER THAN INLAND LOCATIONS. TEMPERATURES WILL MODERATE THROUGH THE WEEKEND AS THE HIGH TRANSLATES EAST AND THE FLOW BECOMES SOUTHERLY.
338 PM EDT FRI MAY 22 2015 HIGH PRESSURE WILL INITIALLY USHER IN UNSEASONABLY COOL TEMPERATURES FRIDAY NIGHT. TEMPERATURES QUICKLY MODERATE THROUGH THE WEEKEND AS THE HIGH SHIFTS EAST OF THE AREA AND THE WIND BECOMES SOUTHERLY. LOCATIONS CLOSEST TO THE LAKE WILL BE SLIGHTLY WARMER THAN INLAND LOCATIONS. TEMPERATURES WILL MODERATE THROUGH THE WEEKEND AS THE HIGH TRANSLATES EAST AND THE FLOW BECOMES SOUTHERLY.
THE HIGHER AMOUNTS EXPECTED OVER THE WEEKEND WITH THE HEAVIER.
THE FRONTAL BOUNDARY IN PLACE ACROSS THE AREA WILL WASH OUT TONIGHT WITH HIGH PRESSURE BUILDING IN FROM THE NORTH THROUGH SATURDAY.
155 PM EDT FRI MAY 22 2015 HIGH PRESSURE WILL BUILD IN FROM THE NORTH TODAY. MUCH COOLER CONDITIONS AS WINDS DECOUPLE AWAY FROM THE BEACHES AND BARRIER ISLAND AND LOWS FALL INTO THE MID/UPPER 50S INLAND UNDER CLEAR SKIES. UNSEASONABLY DRY HIGH PRESSURE WILL SETTLE OVER THE AREA FROM THE NORTH SATURDAY WHILE AN UPPER RIDGE STRENGTHENS OVERHEAD.
WITH MORNING LOWS DROPPING INTO THE LOWER TO MID 40S IN MANY LOCATIONS. HIGH PRESSURE REMAINS IN PLACE OVER MUCH OF THE SOUTHEASTERN CONUS. THIS SHOULD ALLOW HIGHS TO CLIMB INTO THE LOWER TO MID 70S THIS AFTERNOON. LOWERED DEWPOINTS A BIT INTO THE LOWER 40S TOWARD MIDDAY. HIGH PRESSURE WILL CONTINUE TO SLIDE SOUTHWARD ACROSS THE REGION DURING THE NEXT 24 HOURS OR SO.
Light returns on regional associated with the upper level trough axis from south central Nebraska into south central Kansas. Cape remains on the low side through the morning hours on Saturday then increases to a around 400 to 600 J/kg in the afternoon with weak to marginal shear. Models continue to be in good agreement with the upper trough making slow eastward progress into the central ConUS into Memorial Day with deep southerly flow resulting from the local area south through Texas.
AN UPPER LOW CENTERED OVER THE CA/NV/AZ BORDER WILL CONTINUE TO DRIVE SHOWERS OVER THE EAST SIDE, CASCADES, AND SISKIYOUS THROUGH THIS EVENING, WITH ISOLATED STRIKES EXPECTED. THE LOW WILL MOVE NORTHEASTWARD INTO THE GREAT BASIN, AND A SHORT WAVE ASSOCIATED WITH THIS LOW WILL DEVELOP OVER THE COAST AND MOVE SOUTHEASTWARD THROUGH OUR CWA.
141 PM EDT FRI MAY 22 2015 HIGH PRESSURE CENTERED OVER KENTUCKY AND TENNESSEE TODAY WILL BE OVER DELMARVA SATURDAY. THE HIGH WILL DIRECT DRY AIR INTO THE FORECAST AREA. HIGH PRESSURE WILL DIRECT DRY AND COOL AIR INTO THE FORECAST AREA THROUGH TONIGHT.
129 PM EDT FRI MAY 22 2015 SUNNY SKIES AND WARMER TEMPERATURES ARE EXPECTED TODAY WITH HIGHS IN THE MIDDLE 60S TO AROUND 70. EXCEPT COOLER NEAR LAKE MICHIGAN.
THE LOWEST TEMPERATURES NOTED AROUND THE REGION THIS MORNING WERE 40 AT RUSSELLVILLE AND LYNCHBURG. UPPER LEVEL BLOCKING CONTINUED ACROSS THE WEST COAST. A DEEP UPPER LOW OVER QUEBEC WAS PRODUCING TROUGHING ALONG THE EAST COAST. A NORTHERLY FLOW FROM A MODERATING HIGH PRESSURE NOW OVER THE REGION HELPED CREATE THE CHILLY CONDITIONS YESTERDAY AND LAST NIGHT. THE EASTERN CANADIAN UPPER LOW WILL CONTINUE WEAKENING AS IT 'LIFTS' NE TOWARD THE DAVIS STRAIT/GREENLAND. WHILE UPPER RIDGING FORMS OVER THE BAHAMAS AND SE COAST.
HIGH PRESSURE IS SITUATED OVER THE MIDDLE MISS VALLEY WITH LEE TROUGHING STRENGTHENING OVER EASTERN CO AHEAD OF THE UPPER WAVE. AT THIS POINT HAVE THE HIGHEST CONFIDENCE FOR FLOODING FOR SE KS. BROAD UPPER TROUGHING WILL REMAIN OVER THE PLAINS FOR MON WITH THE MAIN UPPER ENERGY OVER NEBRASKA/SD.
A LOW PRESSURE SYSTEMS MOVING NORTH OF THE AREA WILL BRING GUSTY WINDS AND COOLER TEMPERATURES THROUGH SATURDAY. WATER VAPOR IMAGERY SHOWS AN UPPER LOW SPINNING OVER THE GENERAL VICINITY OF SOUTHERN NEVADA. MODELS INDICATE THAT THE AFOREMENTIONED UPPER LOW WILL MOVE TO THE EAST NORTHEAST OVER THE FOUR CORNERS REGION BY LATE AFTERNOON SATURDAY. WITH THE ASSOCIATED TROUGH AXIS DRAPED ACROSS ARIZONA AND NEW MEXICO.
ANOTHER COOLER THAN NORMAL NIGHT IS ON TAP FOR TONIGHT AS A COOLER AND DRIER AIRMASS WILL REMAIN OVER OUR CWA UNTIL SATURDAY AFTERNOON. SURFACE ANALYSIS HAD HIGH PRESSURE CENTERED OVER WESTERN TENNESSEE THIS AFTERNOON. THIS HIGH WILL REMAIN DOMINANT OVER OUR CWA TONIGHT AS IT SHIFTS EAST. OUR WINDS ALOFT WILL BACK TO THE SOUTHWEST SATURDAY IN RESPONSE TO A CLOSED LOW MOVING OVER THE FOUR CORNERS REGION. MID LEVEL RIDGING WILL ALSO STRENGTHEN OVER OUR AREA FROM THE SOUTHEAST.
713 AM EDT Mon Sep 23 2019 High pressure will prevail today. A weak cold front will move into the area Tuesday and then slowly dissipate through mid week. High pressure will then return this weekend. In addition, a cold front was entering the Ohio River Valley, stretching back west across the Southern Great Plains. The sfc pattern across the CWA will be dominated by high pressure, with the center sliding over FL by this afternoon. A weak cold front looks to push into the area Tuesday before stalling and dissipating. Meanwhile, an upper trough will be pushing offshore helping to keep tropical cyclone Jerry well off the coast.
Showers and thunderstorms will be on the increase today into Tuesday as a low pressure system passes through and interacts with tropical moisture over the area.
Chattanooga Airport, TN 90 65 88 60 / 20 20 0 0 Knoxville McGhee Tyson Airport, TN 87 64 85 59 / 20 30 0 0 Oak Ridge, TN 86 63 85 57 / 20 20 0 0 Tri Cities Airport, TN 83 59 80 54 / 20 30 0 0.
649 AM EDT Mon Sep 23 2019 High pressure will prevail today. A weak cold front will move into the area Tuesday and then slowly dissipate through mid week. High pressure will then return this weekend. In addition, a cold front was entering the Ohio River Valley, stretching back west across the Southern Great Plains. The sfc pattern across the CWA will be dominated by high pressure, with the center sliding over FL by this afternoon. A weak cold front looks to push into the area Tuesday before stalling and dissipating. Meanwhile, an upper trough will be pushing offshore helping to keep tropical cyclone Jerry well off the coast.
719 AM EDT Mon Sep 23 2019 VFR conditions will continue across the terminals as a cold front approaches from the west.
We will see a quiet start to the day as we wait for an upper level trough and approaching surface boundary to approach our area. The upper level trough across the desert southwest will move east, and with the previously mentioned boundary getting into our area, expect thunderstorm clusters to develop by the afternoon.
Today, the southern portion of an upper level trough over the western states begins to close off as it drops to the Arizona/California border. A weak upper level trough drifts west across the western Gulf of Mexico. The Subtropical Ridge remains over the Gulf Coast states extending into Central Texas. On Tuesday, the southern portion of the upper level trough closes off over the Arizona/Sonora/Baja/California region while the Gulf trough moves into northeastern Mexico/southern Texas region eroding the Ridge. A stronger low level jet, weak trough, and heating will generate isolated showers and afternoon thunderstorms across areas along and east of I-35/I-37.
Thanks to a clouds, scattered showers and a weak cold front, afternoon temps will only average slightly warmer than normal. 4 AM CDT surface analysis showed a cold front extending from southeast MO to west central AR. The aforementioned jet streak lift out with the exit of a closed low over the eastern Great Lakes by late afternoon. Across the Midsouth, the southward movement of the cold front will slow, eventually stalling over central MS tonight. Moist air south of the front will lift north Tuesday night, in advance of a broad longwave trof lifting across the plains and mid MS River valley.
717 AM EDT Mon Sep 23 2019 A cold front will bring showers to the region today.
901 AM EDT Mon Sep 23 2019 Deep layer high pressure will continue to move southwest of the area with a weak northerly surface flow in place. High pressure and a dry airmass will remain in place across the area today. Skies will be mostly clear with afternoon high temperatures expected to reach the low to mid 90s across most of the area, except upper 80s along the coast.
/issued 254 AM EDT Mon Sep 23 2019/ The center of an expansive mid-upper anticyclone will migrate from the Gulf Coast States into the eastern Gulf of Mexico, as an upper low progresses towards the eastern Bahamas. With deep layer ridging prevailing across the region look for dry and subsident conditions with only a small chance for a shower late in the period.
654 AM EDT Mon Sep 23 2019 A cold front will bring a chance of showers and a few thunderstorms to the area today.
Varying conditions across the region today as a cold front drops south across the region. A slow-moving cold front has pushed through parts of the forecast area this morning, currently extending from the OKC metro to near Okmulgee to Fayetteville. Areas south of I-44 currently appear most susceptible to receiving the higher rainfall amounts, on average from 1 to 2 inches total.
Temps will be on the increase, with mid to upper 80s noted over the lower Ark rvr valley, and lower to mid 80s across the divides. Min temps are expected to be 4 to 8F warmer than this mornings low temps. No freezing temps are anticipated in the SLV.
Cooler air has filtered into the area with temperatures in the mid to upper 50s. Moisture will begin to return later tonight across western into central Kansas as the low level jet strengthens to around 40 kts in western Kansas. Tuesday a mid and upper level trough is forecast to move across the northern and central Plains with the stronger forcing remaining across the northern Plains.
Even warmer for Tuesday ahead of an incoming cold front. Main concern in the near term will be any thunderstorm and severe weather chances associated with the passage of the previously mentioned cold front.
Upstairs, upper level ridging is in place right now, but the axis of the ridge will begin to shift eastward today. In its place, an upper level trough begins to take over.
An upper low in the Pacific NW early today is forecast to dig south into the southern Arizona/California and Baja region by tomorrow where it cuts off from the main jet stream.
Upper ridge centered over the SE US this morning will stretch into W TX as an upper trough moves across the Great Basin today. This trough will develop into a cut off low that move across Srn CA overnight and into Mexico Tuesday.
1034 AM EDT Mon Sep 23 2019 Water vapor imagery highlights mean-layer ridging over the northern Gulf Coast, bookended by two mid-upper level lows, when over the Bay of Campeche, the other east of Florida. A broad area of high pressure stretches west into the southeastern United States, maintaining strong northeast to east breezes across the coastal waters of the Florida Keys. From synopsis, strong northeast to east breezes across the Florida Keys this morning will gradually diminish this afternoon and tonight, then drop off more quickly on Tuesday, as high pressure over the Southeast United States weakens and shifts westward into the Lower Mississippi Valley.
/issued 316 AM CDT Mon Sep 23 2019/ Cold front making slow progress south this morning will continue to move toward the Red River before stalling out this afternoon.
High pressure will begin to build later today and temperatures will trend higher as a result. Even with the warm up, high temperatures will still be cooler than normal for late September.
Expect high temperatures to be in the low to mid 80s on Monday across all of north central and southwest Nebraska. Overnight temperatures will generally be in the 50s with the exception across the Pine Ridge region where lows could drop into the upper 40s.
Surface analysis indicates the cold front is still northwest of our CWA as of 3AM, with scattered showers continuing to develop ahead of it. Cooler and drier air will be filtering into the area through the day, with dewpoints dropping into the 50s. Highs will be slightly above normal in the low to mid 80s.
405 AM CDT Mon Sep 23 2019 Upper ridging will build over the region today ushering in warmer temepratures in the upper 70s to around 80. Another upper trough and a sfc cold front will move through the plains on Tuesday.
943 AM EDT Mon Sep 23 2019 High pressure will prevail today. A weak cold front will move into the area Tuesday and then slowly dissipate through mid week. High pressure will then return this weekend. 23/13z surface analysis showed broad high pressure centered over south-central Georgia this morning and linking up with a secondary high positioned well offshore of Cape Hatteras. This high will move little today keeping the quiet and dry conditions in place across the Southeast. Despite a relatively cool start, temperatures are warming rapidly under full insolation this morning with readings running about 1-3 degrees warmer than 24 hours ago. This will translate to as slightly warmer day with highs ranging from the lower 90s roughly along/west of the I-95c corridor to the lower 80s at the beaches.