Aikyam-Lab/Synoptic-Bench huggingface dataset:
639 AM CDT WED JUL 29 2015 332 AM CDT ONGOING T-STORM ACTIVITY OVER EASTERN CWA ASSOCIATED WITH PRE FRONTAL TROUGH SHOULD CLEAR THE AREA PRIOR TO SUNRISE. AIR MASS NOT THAT MUCH COOLER BEHIND THE FRONT SO HIGHS SHOULD ONCE AGAIN CLIMB WELL INTO THE 80S TO PERHAPS NEAR 90 IF THERE IS ENOUGH SUNSHINE.
942 AM EDT WED JUL 29 2015 WEAK HIGH PRESSURE PERSISTS OVER THE AREA INTO TONIGHT. A COLD FRONT MOVES THROUGH THE REGION THURSDAY FROM THE WEST. HIGH PRESSURE THEN PERSISTS OVER THE AREA THROUGH THE WEEKEND. A BIT MORE CLOUD COVER TODAY SHOULD KEEP TEMPS A DEG OR TWO COOLER THAN YDAY KEEPING HEAT INDICES JUST BELOW 105F. COLD FRONT (NOW STRUNG OUT FROM THE PARENT LOW OVER ONTARIO) CROSSES THE MID-ATLANTIC WITH PREFRONTAL THUNDERSTORM CHANCES REACHING THE CENTRAL APPALACHIANS AFTER MIDNIGHT. COLD FRONT CROSSES THE CWA THROUGH THE DAY. DEWPOINTS IN THE LOW 70S RESULT IN HEAT INDICES AROUND 100F. COLD FRONT CLEARS THE SERN ZONES THURSDAY EVENING WITH COOLER AIR TRAILING. AS HIGH PRESSURE BUILDS IN FROM THE WEST BEHIND DEPARTING COLD FRONT.
A COLD FRONT WILL PASS LATE TONIGHT AND THURSDAY MORNING.
CLOUDS WILL FOLLOW SUIT AND A SUNNY AND NOTABLY COOLER AND DRIER DAY IS IN STORE.
1054 AM CDT WED JUL 29 2015 332 AM CDT ONGOING T-STORM ACTIVITY OVER EASTERN CWA ASSOCIATED WITH PRE FRONTAL TROUGH SHOULD CLEAR THE AREA PRIOR TO SUNRISE. AIR MASS NOT THAT MUCH COOLER BEHIND THE FRONT SO HIGHS SHOULD ONCE AGAIN CLIMB WELL INTO THE 80S TO PERHAPS NEAR 90 IF THERE IS ENOUGH SUNSHINE.
TODAY THROUGH THURSDAY NIGHT 07Z SURFACE ANALYSIS HAD LOW OVER CENTRAL CANADA WITH HIGH PRESSURE OVER THE ROCKIES INTO THE CENTRAL PLAINS. WATER VAPOUR HAD UPPER RIDGE BUILDING OVER WEST CENTRAL CANADA INTO THE NORTHWEST US. UPPER RIDGE WILL CONTINUE BUILDING INTO THE NORTHWEST US THROUGH THURSDAY WITH THERMAL RIDGE EXPANDING EASTWARD INTO THE CWA.
A COLD FRONT CURRENTLY LIES JUST NORTHWEST OF THE FORECAST AREA ACROSS SOUTHEAST KANSAS. WEAK COLD FRONT ACROSS SERN KS/N CENTRAL OK PUSHES SOUTHWARD INTO NERN OK LATE TODAY WITH WIDELY SCATTERED TO SCATTERED TSRA ALONG/NORTH OF IT. CURRENT HEAT ADVISORY ALIGNMENT LOOKS GOOD AS THE NRN ZONES WILL LIKELY SEE COOLER TEMPERATURES THIS AFTERNOON AS THE BOUNDARY DRIFTS INTO THE AREA.
725 AM EDT WED JUL 29 2015 MEDIUM RANGE MODELS CONTINUE TO HOLD THE REGION UNDER THE EASTERN PERIPHERY OF THE UPPER RIDGE THROUGH THURSDAY.
A BROAD RIDGE AXIS IS DRAPED ACROSS OUR MARINE DISTRICT. WHILE TEMPERATURES CLIMB INTO THE LOWER 90S ALONG MOST ISLAND COMMUNITIES. WITH THE RIDGE AXIS LYING ACROSS OUR MARINE DISTRICT.
BUT COVERAGE WILL DECREASE WITH A WEAKER FLOW AS HIGH PRESSURE INCREASES ALOFT. WATER VAPOR IMAGERY AND 29/12Z UPPER-AIR PLOTS SHOW A RIDGE CENTERED OVER THE MID MISSISSIPPI RIVER VALLEY. WHILE AN UPPER LOW RESIDES OFF THE WEST COAST OF THE SOUTH CENTRAL BAJA PENINSULA. BY THURSDAY THE LOW TO OUR SOUTHWEST WILL HAVE LIFTED OUT OF THE PICTURE.
949 AM EDT WED JUL 29 2015 HIGH PRESSURE WILL CONTINUE TO DOMINATE TODAY. A COLD FRONT IS STILL EXPECTED TO CROSS THE REGION THURSDAY.
COINCIDENT WITH THIS TROUGH IS A POOL OF HIGHER SURFACE DEWPOINTS AND SOME LIGHT CONFLUENCE OF THE LOW-LEVEL FLOW. NORTHEAST LOW-LEVEL FLOW SHOULD KEEP THE COASTAL AREAS AND NEAR-COASTAL AREAS SLIGHTLY COOLER TODAY (UPPER 80S TO AROUND 90). WITH PRECIPITABLE WATER AROUND 2 INCHES AND FREEZING LEVELS OVER 16000 FT AGL. LOW AND TROUGH WILL SHIFT TO THE NORTH OF THE WATERS THE NEXT FEW DAYS WITH WINDS INCREASING FROM THE SOUTH THROUGH THE WEEKEND.
AT THE COAST THE THERMAL TROUGH CONTINUES WITH OFFSHORE FLOW THROUGH THIS MORNING.
WE SHOULD GET A SLIGHT RESPITE TOMORROW/FRI WITH THE APPROACH OF A WEAK FRONTAL BOUNDARY (AIDED BY THE DEVELOPING NWLY FLOW ALOFT AND UPPER RIDGE BUILDING OVER THE WRN U. DRIER AIR IN THE WAKE OF THE FRONT OVER THE WEEKEND TO HELP RAISE TEMPS BUT THE LOWER DEWPOINTS SHOULD KEEP HEAT INDICIES BELOW ADVISORY CRITERIA.
605 AM CDT WED JUL 29 2015 GENERALLY WARM AND MAINLY DRY THROUGH THE PERIOD WITH UPPER RIDGE BUILDING OVER THE WEST AND BROAD TROUGH IN THE EAST.
AN UPPER PATTERN CHARACTERIZED BY A MEANDERING HIGH PRESSURE SYSTEM OVER THE SOUTH CENTRAL CONUS. WITH DISTURBANCES MOVING EASTWARD ACRS THE NRN PERIPHERY OF THE RIDGE.
1013 AM CDT WED JUL 29 2015 PERSISTANT HIGH PRESSURE ACROSS THE REGION MAINTAINING HOT CONDITIONS AREAWIDE. EXPECT SOUTHERLY WINDS TO BECOME LIGHT AND VARIABLE THROUGH THE REMAINDER OF THE TAF PERIOD AS HIGH PRESSURE RETROGRADES WESTWARD FROM SE LA INTO WEST CENTRAL LA/DEEP EAST TX. /ISSUED 525 AM CDT WED JUL 29 2015/ WATER VAPOR IMAGERY SHOWS A STRONG RIDGE OF HIGH PRESSURE CENTERED OVER THE OKLAHOMA AND ARKANSAS BORDER THIS MORNING. GIVEN DEW POINTS IN THE LOWER TO MID 70S. 850 MB TEMPERATURES WILL BE SIMILAR OR SLIGHTLY WARMER THAN THOSE OF YESTERDAY.
STRONG UPPER RIDGE REMAINS DOMINANT OVER TX. THE RIDGE CENTER IS OVER AR/ERN OK THIS MORNING AND WILL BE MAKING A WESTWARD SHIFT ACROSS OK INTO NW TX THROUGH THURSDAY.
AN AMPLIFIED UPPER LEVEL TROUGH WAS MOVING EAST ACROSS MN EARLY THIS MORNING. THE SOUTHERN EXTENSION OF THE UPPER TROUGH AXIS EXTENDED SOUTH-SOUTHWEST INTO NORTHEAST KS. THOUGH, I THINK THE COVERAGE WILL DECREASE AS THE SOUTHERN PERIPHERY OF THE MIDWEST H5 TROUGH BEGINS TO SHIFT EAST INTO NORTHERN MO. NORTHEAST SURFACE WINDS WILL ADVECT A SLIGHTLY COOLER AND DRIER AIRMASS SOUTHWESTWARD ACROSS THE CWA. HIGHS TODAY WILL ONLY REACH THE LOWER TO MID 80S ACROSS MUCH OF THE CWA.
NONE OF OUR TERMINALS HAVE SEEN THIS LOWER VSBY FOG THOUGH.
958 AM EDT WED JUL 29 2015 A COLD FRONT WILL PROVIDE THE FOCUS FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND EVENING. HIGH PRESSURE WILL BUILD IN THE MIDWEST ON THURSDAY AND A DRIER AIRMASS IS EXPECTED TO LAST INTO THE WEEKEND FOR THE OHIO VALLEY.
THEN LESS HUMID LATER TOMORROW INTO LATE WEEK BEHIND A COLD FRONT. AN ISOLATED SHOWER OR TWO WILL BE POSSIBLE OVER THE RIDGES BY LATE AFTERNOON. COLD FRONT WILL PASS OVER THE REGION TONIGHT. AS UPPER LEVEL TROUGH DEVELOPS INTO THE EASTERN STATES NORTHWEST FLOW ALOFT WILL KEEP LOWER DEW POINTS WITH NEAR SEASONAL TEMPERATURES INTO LATE WEEK.
1054 AM CDT WED JUL 29 2015 COLD FRONT HAS MOVED THROUGH MOST OF THE CWA THIS MORNING WITH SOME SLIGHTLY COOLER AND DRIER AIR MOVING INTO THE REGION FROM THE NW. A COLD FRONT, CURRENTLY EXTENDING FROM THE WESTERN GREAT LAKES INTO THE CENTRAL PLAINS, WILL SWEEP THROUGH CENTRAL AND SOUTHEAST ILLINOIS TODAY. AS UPPER RIDGE BEGINS TO RE-ESTABLISH ITSELF ACROSS THE WESTERN U. STRONG UPPER LOW OVER LAKE WINNIPEG EARLY THIS MORNING ONLY WILL MAKE SLOW NORTHEAST PROGRESS INTO HUDSON BAY BY THURSDAY AFTERNOON. AS A BROAD TROUGH ENVELOPS THE MIDWEST. WE'LL STILL BE CLOSE ENOUGH TO THE FRINGE OF THE THERMAL RIDGE THAT AIR TEMPERATURES WILL BE IN THE MID- UPPER 80S THROUGH THE REST OF THE WORK WEEK. WITH SOME MODEST COOLING THIS WEEKEND AS THE BROAD TROUGH DIGS FURTHER.
859 AM CDT WED JUL 29 2015 332 AM CDT ONGOING T-STORM ACTIVITY OVER EASTERN CWA ASSOCIATED WITH PRE FRONTAL TROUGH SHOULD CLEAR THE AREA PRIOR TO SUNRISE. AIR MASS NOT THAT MUCH COOLER BEHIND THE FRONT SO HIGHS SHOULD ONCE AGAIN CLIMB WELL INTO THE 80S TO PERHAPS NEAR 90 IF THERE IS ENOUGH SUNSHINE.
WEAK COLD FRONT ACROSS SERN KS/N CENTRAL OK PUSHES SOUTHWARD INTO NERN OK LATE TODAY WITH WIDELY SCATTERED TO SCATTERED TSRA ALONG/NORTH OF IT. CURRENT HEAT ADVISORY ALIGNMENT LOOKS GOOD AS THE NRN ZONES WILL LIKELY SEE COOLER TEMPERATURES THIS AFTERNOON AS THE BOUNDARY DRIFTS INTO THE AREA.
A WEAK COLD FRONT WILL MORE INTO NORTHEASTERN OKLAHOMA OVERNIGHT. A COLD FRONT CURRENTLY LIES JUST NORTHWEST OF THE FORECAST AREA ACROSS SOUTHEAST KANSAS. WEAK COLD FRONT ACROSS SERN KS/N CENTRAL OK PUSHES SOUTHWARD INTO NERN OK LATE TODAY WITH WIDELY SCATTERED TO SCATTERED TSRA ALONG/NORTH OF IT. CURRENT HEAT ADVISORY ALIGNMENT LOOKS GOOD AS THE NRN ZONES WILL LIKELY SEE COOLER TEMPERATURES THIS AFTERNOON AS THE BOUNDARY DRIFTS INTO THE AREA.
ALTHOUGH DEWPOINTS WILL STILL REMAIN IN THE LOWER 70S. ANOTHER ROUND OF SHRA/TSRA IS EXPECTED TO DEVELOP ALONG COLD FRONT ADVANCING SEWD THRU MID TN.
LOW PRESSURE WILL MOVE ACROSS THE NORTHER TIER CONUS TODAY.
930 AM EDT WED JUL 29 2015 A FRONT WILL REMAIN STALLED WELL SOUTHEAST OF THE REGION TODAY WITH WEAK HIGH PRESSURE OVER THE AREA. THE HIGH WILL GRADUALLY MOVE OFF THE COAST THURSDAY.
WITH THE UPPER LEVEL RIDGE WE HAVE BEEN TALKING ABOUT THE LAST COUPLE OF DAYS BUILDING IN EVEN STRONGER TODAY. THE UPPER LEVEL RIDGE WILL PROVIDE TEMPERATURES IN THE LOW TO MIDDLE 90S ONCE AGAIN AND WITH DEW POINTS STILL IN THE MIDDLE 70S. A FEW THUNDERSTORMS COULD LINGER INTO THE MORNING HOURS THURSDAY BUT BY NOON SKIES SHOULD BEGIN TO CLEAR OUT AND A NOTICEABLE DIFFERENCE OF SLIGHTLY COOLER TEMPERATURES AND DRIER AIR WILL FILTER INTO THE STATE.
1014 AM EDT WED JUL 29 2015 THE AVIATION SECTION HAS BEEN UPDATED BELOW A COLD FRONT WILL CROSS INDIANA TODAY.
SHORT TERM: (THROUGH LATE THIS AFTERNOON) 08Z SURFACE ANALYSIS REVEALS THAT THE EAGERLY-AWAITED COLD FRONT (AND ITS NOTICEABLY LESS HUMID POST-FRONTAL AIR MASS) WAS TANTALIZINGLY CLOSE TO THE LSX CWA EARLY THIS MORNING. UNTIL THE COLD FRONT ARRIVES, THERE WILL BE VERY LITTLE CHANGE IN THE SOUPY AIR MASS STILL IN PLACE ACROSS THE REGION. THE TIMING OF THE COLD FRONT IS SUCH THAT ROUGHLY THE SOUTHERN TO SOUTHEASTERN HALF OF THE CWA SHOULD SEE ANOTHER DAY OF HOT/HUMID CONDITIONS, ALBEIT NOT AS OPPRESSIVE AS YESTERDAY.
1003 AM EDT WED JUL 29 2015 THE NEAR TERM SECTION HAS BEEN UPDATED BELOW A COLD FRONT WILL CROSS INDIANA TODAY.
1045 AM EDT WED JUL 29 2015 UPDATE SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AS A COLD FRONT CROSSES THE REGION. GUSTY WESTERLY WINDS BEHIND THE FRONT WILL USHER IN MORE COMFORTABLE LESS HUMID AIR FOR THE REMAINDER OF THE WEEK ALTHOUGH HIGHS WILL REMAIN IN THE LOWER TO MID 80S. A WEAK COLD FRONT IS MOVING ACROSS LAKE MICHIGAN ATTM AND MAY KICK OFF A STORM OR TWO THIS AFTERNOON MAINLY ACROSS THE EASTERN CWA. ISOLATED SHOWERS HAVE DEVELOPED OVERNIGHT ON THE LEADING EDGE OF THE HIGHER PRECIPITABLE WATER AROUND TWO INCHES MOVING IN FROM THE SOUTHWEST AHEAD OF THE APPROACHING COLD FRONT. BASED ON THE HIGH PWAT VALUES OF UP TO 2.
/ISSUED 341 AM CDT WED JUL 29 2015/ ONE MORE DAY OF DANGEROUS HEAT AND HUMIDITY IS EXPECTED ON WEDNESDAY WITH RELIEF COMING IN THE FORM OF A COLD FRONT MOVING THROUGH THE MID-SOUTH LATE WEDNESDAY NIGHT/THURSDAY MORNING. AN UPPER LEVEL RIDGE WAS ANCHORED ACROSS MUCH OF THE SOUTHERN US. HIGH PRESSURE WAS IN PLACE ACROSS MUCH OF THE SOUTHEASTERN US WITH A COLD FRONT ORIENTED SW TO NE FROM THE TX PANHANDLE THROUGH NORTHERN MO/SRN WI. THE FRONT WILL HAVE CLEARED THE REGION LEAVING A MUCH MORE PLEASANT AIRMASS IN PLACE WITH DEWPOINTS IN THE LOW TO MID 60S AND TEMPERATURES IN THE UPPER 60S TO NEAR 70 THURSDAY NIGHT. UPPER LEVEL RIDGING STRENGTHENS ACROSS THE DESERT SOUTHWEST WITH A PERSISTENT AREA OF UPPER LEVEL LOW PRESSURE ACROSS THE EAST-CENTRAL CANADIAN PROVINCES.
636 AM CDT WED JUL 29 2015 A COLD FRONT, CURRENTLY EXTENDING FROM THE WESTERN GREAT LAKES INTO THE CENTRAL PLAINS, WILL SWEEP THROUGH CENTRAL AND SOUTHEAST ILLINOIS TODAY. AS UPPER RIDGE BEGINS TO RE-ESTABLISH ITSELF ACROSS THE WESTERN U. STRONG UPPER LOW OVER LAKE WINNIPEG EARLY THIS MORNING ONLY WILL MAKE SLOW NORTHEAST PROGRESS INTO HUDSON BAY BY THURSDAY AFTERNOON. AS A BROAD TROUGH ENVELOPS THE MIDWEST. WE'LL STILL BE CLOSE ENOUGH TO THE FRINGE OF THE THERMAL RIDGE THAT AIR TEMPERATURES WILL BE IN THE MID- UPPER 80S THROUGH THE REST OF THE WORK WEEK. WITH SOME MODEST COOLING THIS WEEKEND AS THE BROAD TROUGH DIGS FURTHER.
/ISSUED 351 AM CDT WED JUL 29 2015/ (TONIGHT AND WEDNESDAY) A SUBTROPICAL RIDGE WILL BE CENTERED OVER OKLAHOMA THROUGH TONIGHT WITH THE FORECAST AREA IN A SOUTHEASTERLY TO EASTERLY FLOW ALOFT.
COULD BE BORDERLINE AT TIMES BUT STRAIGHT WEST WINDS SOMETIMES HAVE A HARD TIME MIXING INTO THE LOWER ELEVATIONS. RELATIVELY ZONAL LONG WAVE PATTERN AMPLIFIES A BIT THROUGH THE PERIOD WITH SOME RIDGE BUILDING OVER THE WESTERN US AND SLIGHTLY AMPLIFYING TROUGH IN THE EASTERN US.
647 AM CDT WED JUL 29 2015 HIGH PRESSURE CONTINUES OVER THE AREA. A COLD FRONT WILL MOVE THROUGH THE AREA THIS EVENING WITH ISOLATED THUNDERSTORMS.
LATEST WATER VAPOR IMAGERY SHOWS A CLOSED UPPER LOW CIRCULATING OVER SOUTH CENTRAL MANITOBA. UPPER RIDGE BUILDS OVER WESTERN CONUS BRINGING NORTHWESTERLY FLOW ALOFT OVER OUR AREA. BRINGING OCCASIONAL LOW PRECIPITATION CHANCES AND COOLER TEMPERATURES.
AND THURSDAY AN UNUSUALLY STRONG LOW PRESSURE SYSTEM IS CURRENTLY TRACKING THROUGH SOUTHERN CANADA. THE COLD FRONT ASSOCIATED WITH THIS SYSTEM IS CURRENTLY MAKING ITS WAY THROUGH NORTHEAST WISCONSIN EARLY THIS MORNING. BEHIND THE COLD FRONT. CONTINUED THE TREND OF COOLER THAN MOS TEMPERATURES TODAY GIVEN THE UPSTREAM OBSERVED HIGH TEMPERATURES UPSTREAM BEHIND THE COLD FRONT YESTERDAY. THE REGION DRIES OUT TONIGHT AND THURSDAY AS HIGH PRESSURE BUILDS TO THE SOUTH WITH THE AFOREMENTIONED LOW SITUATED ACROSS HUDSON BAY.
THAT COOLER AIR BEHIND THE TROUGH WILL CONTINUE TO FILTER EASTWARD THRU 12Z THIS MORNING. HOT CONDITIONS ARE EXPECTED TO PERSIST FOR THE ENTIRE CWA AS AREA WILL SIT BETWEEN A BROAD H5 RIDGE TO OR EAST. AND A DEVELOPING CLOSED LOW OVER THE PACIFIC NW THAT MOVES INTO THE WESTERN ROCKIES GOING INTO THE WEEKEND.
AS THE UPPER LEVEL RIDGE REMAINS HIGHLY AMPLIFIED AND CENTERED ACROSS THE CENTRAL PLAINS.
706 AM CDT THU SEP 3 2015 A large upper level ridge over the central U. The upper ridge will remain in place through Sat as a high amplitude pattern remains in place with a strong storm system along the west coast.
NOT EXPECTING MUCH CHANGE TO THE HIGH TEMP FORECAST. A LINGERING MID LEVEL TROUGH WITH AN AXIS DROPPING SOUTH ACROSS THE AREA LATE THIS AFTERNOON AND EVENING FURTHER COMPLICATES THINGS.
845 AM PDT THU SEP 3 2015 MODERATE ONSHORE FLOW WILL GRADUALLY WEAKEN LABOR DAY WEEKEND AS AN UPPER LEVEL LOW DEPARTS TO THE EAST.
707 AM CDT THU SEP 3 2015 FOR 12Z TAFS /ISSUED 336 AM CDT THU SEP 3 2015/ UPPER LEVEL RIDGING REMAINS IN PLACE ACROSS THE CENTRAL CONUS. WITH A FAIRLY STRONG UPPER TROUGH SITUATED OVER THE WEST COAST. WEAK UPPER RIDGING WAS OBSERVED. HIGH PRESSURE WAS OBSERVED ACROSS MUCH OF THE EASTERN CONUS. AND TEMPS WILL LIKELY WARM INTO THE LOW TO MID 90S.
MODERATE ONSHORE FLOW WILL GRADUALLY WEAKEN LABOR DAY WEEKEND AS AN UPPER LEVEL LOW DEPARTS TO THE EAST.
ALLOWING DAYTIME HIGHS TO GET INTO THE LOWER TO MIDDLE 80S DURING THE AFTERNOON HOURS. WITH LOWS STAYING IN THE LOWER TO MIDDLE 60S. WITH HIGHS IN THE LOWER TO MIDDLE 80S EXPECTED AWAY FROM THE GREAT LAKES.
UPPER PATTERN TRANSITION WILL OCCUR ON FRIDAY WITH SHEAR AXIS PROGGED TO SHIFT EAST AND WEAK RIDGING FORECASTED TO BUILD OVER THE AREA. UPPER RIDGE IS FORECASTED TO SHIFT WEST AND UPPER TROUGH OR CUT OFF LOW EXPECTED OVER THE NE GULF.
935 AM EDT THU SEP 3 2015 A COLD FRONT WILL DROP SOUTH THROUGH THE REGION TODAY AND WILL PUSH OFFSHORE THIS EVENING.
Lee troughing was persistent in the lee of the Rockies, with southerly surface winds.
1110 AM EDT THU SEP 3 2015 HYDRO A WEAK COLD FRONT WILL PUSH THROUGH THE REGION TODAY LEADING TO SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN.
A CORRIDOR OF MIXING WINDS ACROSS THE EASTERN CWA WILL HELP KEEP TEMPS WARMER TOMORROW NIGHT.
/ISSUED 354 AM EDT THU SEP 3 2015/ WEAK LOW PRESSURE TO THE NORTHEAST WILL DRIFT TO THE SOUTH, ENDING UP TO THE EAST OF THE REGION.
AN UPPER RIDGE WILL BE OVER THE CENTRAL STATES TODAY AND TONIGHT. WITH AN UPPER TROF OVER THE PACIFIC NORTHWEST. WITH GOOD MOISTURE AND WIDESPREAD PCPN EXPECTED OVR THE HIGHER TERRAIN ESPECIALLY ALONG THE CONTINENTAL DIVIDE. BUT SHOULD BE A LITTLE COOLER OVER WESTERN LOCATIONS.
A WEAK COLD FRONT WILL PUSH THROUGH THE REGION TODAY LEADING TO SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN.
VISIBLE SATELLITE SHOWS CLOUDS CYCLONICALLY SPINNING ACROSS NORTH ALABAMA AS AN UPPER LEVEL LOW MOVES EAST. ADJUSTED CLOUD COVER TRENDS FOR TODAY WITH THE PROGRESSION OF THE LOW.
AN AMPLIFIED UPPER RIDGE EXTENDS FROM TEXAS NORTH THROUGH THE WESTERN GREAT LAKES WHILE AN AMPLIFIED UPPER TROUGH EXTENDS ACROSS THE PACIFIC NORTHWEST. A STRONG THERMAL RIDGE WILL ONCE AGAIN BE IN PLACE ACROSS THE HIGH PLAINS TODAY.
WV IMAGERY AND UPPER AIR ANALYSES SHOW THAT THE WEAK SHEAR AXIS AND ASSOCIATED TROUGH THAT STRETCHES FROM THE LOWER MISSISSIPPI RIVER VALLEY TO THE SE TX AND LA GULF COAST CONTINUES TO WEAKEN. MODELS ARE CONSISTENT IN BUILDING AND INTENSIFYING THE UPPER LEVEL RIDGE OVER THE SOUTHERN PLAINS TODAY AND FRIDAY AS AN INVERTED TROUGH BREAKS OFF FROM THE PROGRESSIVE TROUGH AND RETROGRADES UNDER THE RIDGE AS IT WEAKENS.
FLOW WILL TURN WEST- SOUTHWESTERLY AS LOW PRESSURE SHIFTS ACROSS THE GREAT BASIN.
725 AM EDT THU SEP 3 2015 AN UPPER LEVEL DISTURBANCE AND WEAK SURFACE COLD FRONT WILL MOVE SOUTH ACROSS THE NORTH COUNTRY TODAY. A DEEP LAYER RIDGE WILL RETURN TO THE REGION. WILL SEE A SLIGHTLY COOLER AIR MASS WITH NORTHERLY WINDS AROUND 10 MPH DEVELOPING THIS AFTERNOON. HIGH TEMPERATURES WILL BE GENERALLY IN THE LOWER TO MID 80S. HIGH PRESSURE BRINGS FAIR AND TRANQUIL CONDITIONS TONIGHT. HIGH PRESSURE SETTLES OVER FORECAST AREA ON FRIDAY. TEMPS WILL BE SLIGHTLY COOLER. DEEP LAYER RIDGE ANCHORED OVER THE NORTH COUNTRY THURSDAY NIGHT AND FRIDAY. EXCEPT FOR SOME UPPER 40S IN THE NORMALLY COOLER SPOTS IN THE ADIRONDACKS AND NORTHEAST KINGDOM.
CURRENT WATER VAPOR LOOP SHOWS A RIDGE AXIS BUILDING OVER THE GREAT PLAINS AS A BROAD UPPER LEVEL TROUGH SETTLES OVER THE PACIFIC NORTHWEST. INCREASED POP UP TO 45 PERCENT ACROSS THE HIGH PLAINS FRIDAY EVENING.
THE RIDGE ALOFT WILL CONTINUE TO MAINTAIN THE STATUS QUO OVER OKLAHOMA AND NORTH TEXAS THROUGH THE PERIOD. /ISSUED 352 AM CDT THU SEP 3 2015/ A RIDGE ALOFT WILL CONTINUE TO BE THE MAIN FEATURE OF OUR WEATHER INTO THE WEEKEND.
TEMPS WILL REACH THE UPPER 80S ALONG AND WEST OF THE BLUE RIDGE TO THE LOW TO MID 90S NEAR THE I-95 CORRIDOR.
WEAK HIGH PRESSURE WILL REMAIN IN PLACE OVER THE FORECAST AREA THROUGH THE PERIOD. THE FORECAST AREA WILL GRADUALLY BECOME WEDGED BETWEEN AN UPPER RIDGE TO OUR WEST AND TROUGHING ALONG THE EAST COAST AS WE HEAD INTO THE UPCOMING WEEKEND. MOISTURE ALOFT LIFTING NORTH INTO THE REGION FROM A WEAKENING MID/UPPER LOW CURRENTLY OVER THE WEST CENTRAL GULF OF MEXICO.
AN UPPER LEVEL LONGWAVE TROUGH OVER THE WEST COAST. WITH A DOWNSTREAM THERMAL RIDGE EXTENDING FROM THE MISSISSIPPI VALLEY TO MANITOBA/WESTERN ONTARIO WILL KEEP A SOUTHWEST FLOW ALOFT OVER THE DAKOTAS TODAY AND TONIGHT. THE RIDGE IS FORECAST TO MOVE EASTWARD SLOWLY. A TROUGH EXTENDING FROM CENTRAL SASKATCHEWAN TO EASTERN MONTANA THIS MORNING IS FORECAST TO MOVE EASTWARD SLOWLY TODAY. BY THIS EVENING THE TROUGH IS FORECAST TO EXTEND FROM MANITOBA TO CENTRAL NORTH DAKOTA. RECORD HIGHS TODAY: YEAR WILLISTON 102 1978 MINOT 101 1940 DICKINSON 99 2007 BISMARCK 101 1978 JAMESTOWN 99 1922 THE THERMAL RIDGE SHOULD CAP ANY CONVECTION TODAY. TROUGH OVER THE FAR WESTERN CONUS WILL DEEPEN AND START SLOWLY WORKING TOWARDS THE EAST.
MAINLY FAVORING THE HIGHER TERRAIN OF THE EAST TENNESSEE AND WESTERN NORTH CAROLINA MOUNTAINS. CHATTANOOGA AIRPORT, TN 91 71 92 70 / 20 10 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 90 70 90 68 / 10 10 10 10 OAK RIDGE, TN 90 69 90 69 / 10 10 10 10 TRI CITIES AIRPORT, TN 88 64 89 64 / 20 10 20 10.
1004 AM EDT THU SEP 3 2015 THE NEAR TERM SECTION HAS BEEN UPDATED BELOW A BROAD UPPER LEVEL RIDGE OF HIGH PRESSURE WILL CONTINUE ACROSS THE EASTERN AND CENTRAL U.
A BROAD UPPER LEVEL RIDGE OF HIGH PRESSURE WILL CONTINUE ACROSS THE EASTERN AND CENTRAL U.
A WEAK UPPER LEVEL TROUGH WILL CONTINUE TO PRODUCE A MEAGER CHANCE OF A FEW AFTERNOON SHOWERS OR STORMS TODAY AND AGAIN FRIDAY. THE UPPER LEVEL PATTERN THROUGH THE EXTENDED WILL CONTINUE TO FEATURE AN UPPER LEVEL RIDGE OVER THE EASTERN CONUS.
AN UPPER LEVEL TROUGH WILL MOVE THROUGH THE PACIFIC NORTHWEST TODAY AND FRIDAY.
718 AM EDT THU SEP 3 2015 AN UPPER LEVEL DISTURBANCE AND WEAK SURFACE COLD FRONT WILL MOVE SOUTH ACROSS THE NORTH COUNTRY TODAY. A DEEP LAYER RIDGE WILL RETURN TO THE REGION. WILL SEE A SLIGHTLY COOLER AIR MASS WITH NORTHERLY WINDS AROUND 10 MPH DEVELOPING THIS AFTERNOON. HIGH TEMPERATURES WILL BE GENERALLY IN THE LOWER TO MID 80S. HIGH PRESSURE BRINGS FAIR AND TRANQUIL CONDITIONS TONIGHT. HIGH PRESSURE SETTLES OVER FORECAST AREA ON FRIDAY. TEMPS WILL BE SLIGHTLY COOLER. DEEP LAYER RIDGE ANCHORED OVER THE NORTH COUNTRY THURSDAY NIGHT AND FRIDAY. EXCEPT FOR SOME UPPER 40S IN THE NORMALLY COOLER SPOTS IN THE ADIRONDACKS AND NORTHEAST KINGDOM.
932 AM EDT THU SEP 3 2015 WEAK HIGH PRESSURE AND WEAK STEERING FLOW CONTINUES.
Otherwise, plenty of sunshine with max temps in the lower 90s, with mid 90s in the STL metro area, closely following persistence. Remainder of the day looks to be a carbon copy of the past couple with high pressure controlling our weather.
THE COMBINATION OF TEMPERATURES IN THE LOW TO MID 90S AND DEW POINTS AROUND 70 WILL YIELD AFTERNOON HEAT INDEX VALUES OF 95 TO 100. AS UPPER RIDGING CONTINUES TO DOMINATE THE REGION. WILL GO WITH A DRY FORECAST TODAY WITH HIGH TEMPERATURES ONCE AGAIN REACHING THE LOWER TO MIDDLE 90S.
FLOW WILL TURN WEST-SOUTHWESTERLY AS LOW PRESSURE SHIFTS ACROSS THE GREAT BASIN.
HIGH PRESSURE WILL ENSURE FAIR AND DRY WEATHER FOR LABOR DAY WEEKEND. HOWEVER LOW POPS WILL EXIST ACROSS THE ENTIRE CWA WITH SLIGHTLY HIGHER PROBS PAINTED OVER THE HIGHER TERRAIN OF THE N/W ALLEGHENIES. THE DEEP-LAYER FLOW WILL BE RATHER WEAK UNDER BROAD UPPER RIDGING WHICH SHOULD LIMIT POTENTIAL FOR ORGANIZED SVR STORMS. UPPER LEVEL RIDGING WILL REMAIN A DOMINANT FEATURE INTO THE WEEKEND. A BACKDOOR COLD FRONT SHOULD ALIGN ITSELF NEAR THIS AXIS AND PROVIDE ENOUGH LOW LEVEL CONVERGENCE TO SPARK SOME CONVECTION OVER CENTRAL AND ESPECIALLY SRN PA PER MULTI MODEL CONSENSUS.
With the upper level high centered over Florida, forcing mechanisms will be limited to the sea breeze today. Highs will be in the low to mid 90s, which is slightly above average.
733 AM EDT THU SEP 3 2015 AVIATION A WEAK COLD FRONT WILL PUSH THROUGH THE REGION TODAY LEADING TO SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN.
VFR CONDITIONS ARE EXPECTED THE REST OF THE PERIOD AS HIGH PRESSURE SETTLES OVER THE AREA.
637 AM CDT THU SEP 3 2015 SURFACE MAP EARLY THIS MORNING HAS A WARM FRONTAL BOUNDARY EXTENDING FROM SOUTHERN MN EASTWARD INTO SOUTHERN WI. THE AFOREMENTIONED FRONTAL BOUNDARY WILL STAY PUT WHILE A MID-LEVEL TROUGH AND PUSH OF MID-LEVEL PV-ADVECTION DRIFTS SOUTHEAST ACROSS CENTRAL WI BY LATER THIS AFTERNOON. MOISTURE CONVERGENCE ALONG THE FRONTAL BOUNDARY AND FORCING FROM MID-LEVEL TROUGH IS EXPECTED TO FIRE ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS EAST OF THE MISSISSIPPI RIVER. LINGERING ISOLATED STORMS EXPECTED TO CONTINUE INTO THE OVERNIGHT HOURS //MAINLY EAST OF THE MISSISSIPPI RIVER// AS THAT MID-LEVEL TROUGH CONTINUES TO PUSH SOUTH ACROSS THE AREA. KEPT A SMALL-END CHANCE IN FOR EAST OF THE MISSISSIPPI RIVER IN THE AFTERNOON AS THERE WILL STILL BE SOME WEAK SURFACE CONVERGENCE AND TROUGHINESS ALOFT WITH FAIRLY STEEP LAPSE RATES.
STILL THINK THAT THE NORTH DAKOTA SIDE WILL GET INTO THE LOW 90S. BUT WILL MONITOR IN CASE THE CLOUDS HANG AROUND A BIT LONGER AND KEEP US A FEW DEGREES COOLER THAN EXPECTED.
HIGH PRESSURE WILL REMAIN ACROSS THE WATERS THROUGH TODAY.
TEMPERATURES WILL CONTINUE TO COOL THROUGH FRIDAY AS AN UPPER LEVEL TROUGH DIGS SOUTHWARD FROM THE PACIFIC NORTHWEST.
An upper level ridge will remain nearly stationary across the southern and central plains for the next 24 hours as an upper level trough across the pacific northwest amplifies southward along the west coast. Most of the weak upper level troughs embedded within the southern stream jet should move north-northeast around the western periphery of the upper ridge axis across the high plains. Highs once again should reach the lower to mid 90s across the CWA with the higher temperatures across the western and southwest counties of the CWA.
HIGHS WILL AGAIN RANGE FROM THE LOW TO MID 90S INLAND AND THE UPPER 80S TO NEAR 90 CLOSE TO THE COAST. A MORE AMPLIFIED UPPER LEVEL PATTERN SETS UP FOR THE CLOSE OF THE WEEK WITH A TROF BECOMING POSITIONED OVER THE EASTERN US. WHILE A DEEP LAYER RIDGE OVER TEXAS NOSES NORTHWARD. 8 INCHES) LOOKS TO REMAIN IN PLACE AND ALTHOUGH MID LEVEL IMPULSES DROP SOUTHWARD ON THE WEST SIDE OF EVOLVING TROF. THE SURFACE PRESSURE PATTERN REMAINS WEAK WITH HIGH PRESSURE OVER THE GULF AND A WEAK PRESSURE TROF EXTENDING FROM GEORGIA. OVERNIGHT LOWS IN THE LOWER 70S INTERIOR TO MID 70S COAST.