Aikyam-Lab/Synoptic-Bench huggingface dataset:
THE MID LEVEL SYSTEM IS FAIRLY DYNAMIC WITH 500 MB TEMPERATURES NEAR THE LOW CENTER AROUND -20 DEGREES CELSIUS. LIGHTNING NETWORK IS CURRENTLY SHOWING A DECENT AMOUNT OF CONVECTION NEAR THE LOW CENTER AND TO ITS NORTH.
326 PM CDT MON MAY 18 2015 TONIGHT-WED: A CHILLY NIGHT IS EXPECTED ACROSS THE FORECAST AREA AS THE SECONDARY COLD FRONT THAT PASSED THROUGH THE AREA THIS MORNING. WILL LEAD TO A RIDGE OF HIGH PRESSURE SETTLING OVER THE AREA TONIGHT. THIS WILL BRING COOLER AND DRIER AIR INTO THE REGION. WILL START TO SEE SOME LOW LEVEL MOISTURE BEGIN TO RETURN TO THE HIGH PLAINS LATE TONIGHT ON THE BACKSIDE OF THE RIDGE. STILL SOME TIMING DIFFERENCES ON HOW QUICKLY THIS LOW LEVEL MOISTURE TRANSPORT WILL INCREASE INTO WRN KS ON TUE MORNING. AS WEAK RIDGING MOVES ACROSS THE AREA. NORTHERLY WINDS GUSTING TO AROUND 22 KNOTS CAN BE EXPECTED THIS AFTERNOON IN THE WAKE OF A COLD FRONTAL PASSAGE EARLIER THIS MORNING.
SPRAWLING LOW PRESSURE OVER THE UPPER GREAT LAKES WILL MOVE EAST OVERNIGHT. CLOUDS WILL INCREASE FROM THE NORTHWEST LATER THIS EVENING INTO TUESDAY MORNING AS THE COOLER AIRMASS MOVES IN.
LOW PRESSURE WILL REMAIN OVER THE REGION THROUGH TONIGHT AND BRING A CHANCE OF SPRINKLES AND LIGHT RAIN OVER THE SAN JOAQUIN VALLEY. THERE WILL BE INCREASED CHANCES OF AFTERNOON AND EVENING SHOWERS AND ISOLATED THUNDERSTORMS OVER THE HIGHER ELEVATIONS OF THE SIERRA NEVADA THROUGH THE REMAINDER OF THIS WEEK. BROAD UPPER TROUGH OVER THE WESTERN CONUS WITH THE MAIN UPPER LOW CENTER OVER INYO COUNTY KEEPING UNSETTLED CONDITIONS ACROSS OUR AREA TODAY. MOST OF THE THUNDERSTORM ACTIVITY SO FAR HAS BEEN AHEAD OF THE LOW ON THE WAA SIDE OVER SOUTHERN AND EASTERN NV. THE 12Z WRF IS INDICATING THE UPPER LOW CENTER WILL LIFT SLOWLY NORTHEAST TONIGHT AND TUESDAY.
100 PM PDT MON MAY 18 2015 CORRECTED ISSUANCE TIME A SERIES OF THREE WEAK LOW PRESSURE SYSTEMS WILL MOVE INLAND THROUGH CALIFORNIA THIS WEEK.
A weak cold front will approach the Big Country late tonight, providing a low level focus for storm development.
FORECAST CHALLENGE WILL BE FREEZING TEMPERATURES TONIGHT. UPPER LOW WILL MOVE SOUTH OF THE STATE. HIGH PRESSURE WILL REMAIN OVER NORTH DAKOTA THROUGH THE WORK WEEK.
356 PM CDT Mon May 18 2015 Tonight - Tuesday: A seasonally cool area of high pressure over the Northern Plains will press southward overnight into Tuesday yielding temperatures 5 to 10 degrees below average.
ESPECIALLY IN THE HIGHER TERRAIN. MLV /ISSUED 545 AM MDT MON MAY 18 2015/ A WEAK RIDGE WILL BUILD INTO THE AREA BEHIND THE THE WEATHER SYSTEM THAT PRODUCE SIGNIFICANT RAINFALL AMOUNTS OVER THE WEEKEND. THE BIGGER WEATHER CONCERN IS GOING TO BE THE NEAR RECORD LOWS MONDAY MORNING AND TUESDAY MORNING AS TEMPERATURES ARE FORECAST TO DROP NEAR OR BELOW FREEZING AT MANY LOCATIONS.
410 PM CDT MON MAY 18 2015 A COLD FRONT LOCATED FROM WEST TEXAS. OVERNIGHT THE COLD FRONT SHOULD CONTINUE TO SAG TO THE SOUTHEAST AND BECOME NEARLY STATIONARY OVER SOUTHEAST OKLAHOMA LATE TONIGHT. THE FRONTAL BOUNDARY OVER SOUTHERN OKLAHOMA IS EXPECTED TO LIFT BACK NORTHWARD NEAR THE OKLAHOMA KANSAS BORDER AS A WARM FRONT.
400 PM CDT MON MAY 18 2015 STRONG NORTHWEST FLOW AND STRATOCUMULUS ON BACKSIDE OF EXITING LOW PRESSURE HAVE KEPT VERY COLD CONDITIONS IN PLACE FOR MUCH OF THE AREA. HOWEVER EVEN WITH THESE COOLER TEMPERATURES WINDS MAINLY LESS THAN 15 MPH WILL REALLY HELP IT FEEL MUCH BETTER THAN TODAY.
THE MOST LIKELY SCENARIO IS THAT THE COLD FRONT ACROSS CENTRAL/SOUTHWEST OKLAHOMA WILL CONTINUE TO MOVE SOUTH AND WEAKEN TODAY AND TONIGHT. WITH VERY WEAK CONVERGENCE NEAR THE FRONTAL BOUNDARY AND S/WV RIDGING OVER THE REGION. MORE IN THE WAY OF ORGANIZED STORMS WILL BE POSSIBLE LATE THIS EVENING AND OVERNIGHT IF ACTIVITY TO OUR WEST CAN MOVE INTO WESTERN OKLAHOMA AND ADJACENT PARTS OF NORTH TEXAS AS S/WV TROUGH APPROACHES.
THE FLOW ALOFT IS LIGHT SOUTHERLY BUT A FEW CELLS MAY DRIFT WEST OF THE CASCADES INTO THE LOWLANDS. AN UPPER LEVEL LOW ALONG THE WEST COAST WILL EXPAND AND MOVE INLAND ON TUESDAY.
345 PM CDT MON MAY 18 2015 A FEW THUNDERSTORMS FORMED THIS AFTERNOON NEAR A COLD FRONT OVER SOUTHERN AND EASTERN OKLAHOMA.
LARGE UPPER LOW MOVING INTO CALIFORNIA TODAY. CLOUDS ROTATING AROUND THE NORTHERN PORTION OF THE LOW INTO OREGON AND WASHINGTON. THE UPPER LOW MOVES INTO NEVADA TUESDAY. SCATTERED TO NUMEROUS SHOWERS WILL BE OVER MUCH OF THE HIGHER TERRAIN AOA 3K FT MSL IN CENTRAL AND NE OREGON TODAY THROUGH THIS EVENING. A BROAD UPPER LEVEL TROUGH OF LOW PRESSURE WILL REMAIN OVER THE WESTERN U. THIS LOW WILL CONTINUE TO WRAP MOIST, UNSTABLE AIR INTO THE PACIFIC NORTHWEST.
154 PM EDT MON MAY 18 2015 HIGH PRESSURE WILL WEAKEN AND SHIFT EAST TODAY ALLOWING HIGHER LEVELS OF ATMOSPHERIC MOISTURE INTO OUR REGION. THEN A COLD FRONT IS EXPECTED TO MOVE THROUGH TUESDAY NIGHT. AS THE RIDGE MOVES EAST MOISTURE ADVECTION WILL INCREASE OVER THE AREA ALLOWING PWAT VALUES TO RISE TO AROUND 1. UPPER RIDGE WILL CONTINUE TO WEAKEN AND SHIFT TO OUR EAST.
SLOW MID LEVEL RIDGING FROM TX INTO THE CENTRAL PLAINS WILL SLOWLY TRANSITION OUR FLOW FROM THE SW TO MORE WESTERLY.
310 PM EDT MON MAY 18 2015 SCATTERED SHOWERS AND THUNDERSTORMS WILL COME TO AN END AS A COLD FRONT MOVES THROUGH THE REGION TUESDAY MORNING.
A COLD FRONT CROSSES TUESDAY. WILL SEE A FEW DEGREES OF COOLING TUESDAY OVER TODAYS HIGHS AS COOLER AIRMASS MOVES IN. RAISED POPS A BIT IN THE EAST MONDAY NIGHT AHEAD OF THE COLD FRONT.
As storms move off the higher terrain toward the northeast, looking for merging of cells into a larger-scale complex aided by development of a southeasterly low level jet this evening which will sustain instability across the area.
A SEVERED RIDGE EXTENDS FROM THE NORTHWEST BAHAMAS TO EXTREME SOUTH FLORIDA.
548 PM EDT MON MAY 18 2015 AN APPROACHING LOW PRESSURE SYSTEM WILL BRING UNSETTLED WEATHER TO THE REGION THROUGH THE NEXT 48 HOURS. A WEAK COLD FRONT WILL MOVE THROUGH TOMORROW EVENING AND WILL PROVIDE THE FOCUS FOR SOME THUNDERSTORM ACTIVITY.
300 PM PDT MON MAY 18 2015 LOW PRESSURE ALOFT WILL REMAIN OVER CALIFORNIA AND NEVADA THROUGH THE END OF THE WORK WEEK, BRINGING BELOW AVERAGE TEMPERATURES AND ROUNDS OF SHOWERS AND THUNDERSTORMS, MAINLY IN THE AFTERNOONS AND EVENINGS. A TROUGH OF LOW PRESSURE REMAINS OVER THE WEST. AN UPPER DISTURBANCE OVER SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA IS ROTATING AROUND THE TROUGH, BRINGING INCREASED DIVERGENCE ALOFT AND HELPING TO INITIATE SHOWERS AND THUNDERSTORMS OVER SOUTHERN AND EASTERN NEVADA. AS FAR AS THUNDERSTORMS, LOW FREEZING LEVELS AND WEAK INSTABILITY MAKE IT HARD TO RULE OUT BRIEF, ISOLATED CELLS. LATE TONIGHT, THE HRRR AND LESS-SO THE GFS AND NAM ARE INDICATING WRAP-AROUND PRECIPITATION OVER NORTHEAST CALIFORNIA AND NORTHWEST NEVADA AS THE UPPER LOW ADVANCES INTO EASTERN NEVADA.
402 PM EDT MON MAY 18 2015 A COLD FRONT WILL CROSS THE AREA TONIGHT WITH SCATTERED SHOWERS.
350 PM CDT MON MAY 18 2015 FORECAST CHALLENGES INCLUDE FREEZING TEMPS TONIGHT.
STUNTED CLOUD LINE WITH CUMULUS PATHETICUS HAS PERSISTED IN THE VICINITY OF THE LOWER FLORIDA KEYS DURING THE LAST FEW HOURS.
559 PM CDT Mon May 18 2015 A thin band of cumulus clouds on the visible satellite shows nicely where the cold front is currently located across the Missouri Ozarks. A cooler and drier airmass will move in tonight. Dewpoints in the lower to middle 40s across northwest Missouri will move into the Missouri Ozarks by morning. It will be perfect open the windows type weather tonight with lows in the middle 40s across central Missouri to the lower 50s across southern Missouri. A very pleasant day is heading our way for Tuesday with high pressure filtering in and mostly sunny skies.
HIGHS TODAY AND THURSDAY WILL REACH THE LOWER 80S. PERSISTENT AMPLIFIED NOAM PATTERN WITH DEEP WEST COAST LONGWAVE TROF AND 70W RIDGE TO MAINTAIN DEEP SOUTHERLY FLOW ACRS REGION THROUGH SHORT TERM. QUITE COOL START /PRIMARILY IN LWR 50S/ ALONG WITH SMALL REGION OF COOLER 925/8H TEMPS ACRS KY/TN TO ADVECT NWD INTO INDIANA TODAY SHOULD SLIGHTLY OFFSET FULL INSOLATION POTENTIAL TODAY. SLOW/GRADUAL THERMAL MODERATION THEREAFTER SUPPORTS LOWS 3-5 WARMER/24HR WED NIGHT. ENERGY FROM A DEEPENING UPPER LEVEL TROF ALONG THE WESTERN NORTH AMERICA COAST WILL EVENTUALLY EJECT EAST ACROSS THE CONUS AND INTO THE MIDWEST AND UPPER GREAT LAKES REGIONS.
DEEP TROPICAL MOISTURE REMAINS IN PLACE ON E/SE FLOW ON THE BACK SIDE OF THE TROUGH IN THE GULF OF MEXICO. LOWERED TEMPERATURES SLIGHTLY IN THE MORNING HOURS DUE TO EXTENSIVE CLOUD COVER ALONG THE COASTS, BUT WITH A FEW BREAKS OUT THERE DIDN'T WANT TO LOWER THE HIGH TEMPERATURES MUCH. /ISSUED 401 AM EDT WED SEP 16 2015/ 7Z WV LOOP DEPICTS DEEP SHRTWV TROUGH OVER SOUTHERN ALABAMA. SHRTWV TROUGH ONLY SLOWLY PUSHING EASTWARD.
/ISSUED 355 AM CDT WED SEP 16 2015/ AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL BUILD EAST FROM THE SOUTHERN PLAINS THROUGH THE END OF THIS WEEK.
100 PM EDT WED SEP 16 2015 A LARGE AREA OF HIGH PRESSURE ALONG THE EAST COAST WILL WEAKEN AND MOVE EAST THIS WEEKEND.
DRY WX WILL CONTINUE WITH HIGHS MOSTLY IN THE LOW TO MID 80S. UPPER RIDGE.
919 AM EDT WED SEP 16 2015 A LARGE AREA OF HIGH PRESSURE ALONG THE EAST COAST WILL WEAKEN AND MOVE EAST THIS WEEKEND.
LATEST AVAILABLE IR IMAGERY OVERLAID WITH MODEL STREAMLINE ANALYSIS AS OF 900 AM DEPICTS THE CENTER OF A DEEP WARM ANTICYCLONE CENTERED OVER NORTHERN OLD MEXICO WELL TO THE WEST. THE AXIS OF A WEAK UPPER RIDGE (AT 250 MB) IS SITUATED FROM THE NORTHERN BAHAMAS SOUTHWEST TO THE KEYS AND THE SOUTHEASTERN GULF OF MEXICO. AT THE SURFACE AND IN THE LOWER TO MIDDLE LEVELS. NEAR 1030 MB SURFACE RIDGING WELL TO THE NORTH WILL REMAIN IN PLACE AS WE APPROACH THE AUTUMNAL EQUINOX.
THE UPPER LEVEL TROUGH OVER THE FOLLOWED BY A DRIER AND WARMER WESTERLY FLOW THROUGH THE END OF THE WEEK. MORNING OBJECTIVE ANALYSIS CLEARLY INDICATES A COLD FRONT STRETCHING FROM ROUGHLY GANDY TO SOUTHERN SALT LAKE COUNTY TO NEAR EVANSTON WYOMING. THE SURFACE COLD FRONT JUST TO SOUTH OF THE KSLC TERMINAL WILL CONTINUE TO PRESS SOUTH TODAY.
1014 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL STAY PARKED OVER THE MID ATLANTIC STATES INTO THE UPCOMING WEEKEND.
A BIT WARMER TONIGHT WITH DEWPOINTS CREEPING UPWARDS AND LIGHT EASTERLY WINDS. CANNOT COMPLETELY RULE OUT A SHOWER/STORM IN THE FAR SOUTHEAST TODAY OR TOMORROW AS WEAK UPPER TROUGH/LOW PULLS AWAY TO THE NORTHEAST. UPPER RIDGING WILL NOSE IN FROM THE WEST AND OUR WEATHER WILL REMAIN DRY WITH TEMPERATURES WARMING.
740 AM CDT WED SEP 16 2015 AN UPPER LEVEL RIDGE WILL BUILD ACROSS THE REGION DURING THE NEXT 48 HOURS. /ISSUED 349 AM CDT WED SEP 16 2015/ AN UPPER LEVEL HIGH WILL BEGIN TO BUILD INTO THE REGION FROM THE SOUTHWEST TODAY WHICH WILL RESULT IN INCREASING SUBSIDENCE AND A DRYING OF THE DEEP LAYER MOISTURE.
TEMPERATURES WILL BE SIMILAR TO YESTERDAY ALTHOUGH POSSIBLY COOLER IN THE CSRA AND SOUTH MIDLANDS WHERE CLOUDINESS SHOULD BE MORE EXTENSIVE. THE TIGHT MOISTURE GRADIENT WILL REMAIN NEAR THE FORECAST AREA TONIGHT WITH HIGH PRESSURE NORTH OF THE AREA WITH A LONG-FETCH ONSHORE FLOW MAINLY SOUTH OF THE AREA.
1126 AM EDT WED SEP 16 2015 A LARGE AREA OF HIGH PRESSURE ALONG THE EAST COAST WILL WEAKEN AND MOVE EAST THIS WEEKEND.
1117 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL PROVIDE DRY AND WARM WEATHER FOR THE REST OF THE WEEK. LARGE RIDGE ACROSS THE EASTERN CONUS WILL PROVIDE ANOTHER SUNNY DAY. HIGH TEMPERATURES SHOULD BE A DEGREE OR TWO WARMER THAN YESTERDAY. RIDGING WILL CONTINUE ACROSS THE MID ATLANTIC AND NORTHEAST CONUS THROUGH THE PERIOD. DRY AND WARM CONDITIONS ARE EXPECTED INTO THE BEGINNING OF THE WEEKEND WITH UPPER LEVEL RIDGE ACROSS THE EASTERN CONUS. THE UPPER FLOW IS PROGGED TO FLATTEN OVER THE WEEKEND AS THE RIDGE MOVES EAST.
900 AM CDT WED SEP 16 2015 252 AM CDT STRONG RIDGING WILL REMAIN ANCHORED OVER THE MID ATLANTIC COAST TODAY AND TOMORROW WHILE LOW PRESSURE LIFTS NORTHEAST ACROSS THE CANADIAN PRAIRIES. AFTERNOON GUSTS INTO THE HIGH TEENS TO LOW 20 KT RANGE ARE EXPECTED. PERHAPS A DEGREE WARMER. THEN THURSDAY WILL SEE ANOTHER DEGREE OR TWO ADDED AS THE THERMAL RIDGE INCHES CLOSER. LOW PRESSURE WILL LIFT ACROSS ONTARIO TO OVER HUDSON BAY WITH A TRAILING COLD FRONT STRETCHING INTO NORTHERN ILLINOIS WHICH WILL SERVE AS THE FOCUS FOR SHOWERS AND THUNDERSTORMS.
1113 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL REMAIN ANCHORED ACROSS THE NORTHEAST AND MID-ATLANTIC STATES FOR THE REMAINDER OF THE WORK WEEK. THE HIGH WILL SLOWLY DRIFT OFF THE EAST COAST LATE IN BRINGING THE NEXT CHANCE FOR UNSETTLED WEATHER. INLAND LOCATIONS IN THE SOUTHERN TIER WILL SEE STRONG RADIATIONAL COOLING / WHERE WINDS DECOUPLE IN THE VALLEYS / RESULTING IN LOWS IN THE LOWER 50S AND A REPEAT OF SOME PATCHY DENSE RIVER VALLEY FOG. DEEP LAYER RIDGE ACROSS THE NORTHEAST CONUS AND SOUTHEAST CANADA WILL REMAIN IN PLACE THROUGH THE PERIOD. AS A DEAMPLIFICATION IN THE PATTERN OVER WILL LEAD TO A VERY BROAD BASED LONG WAVE TROUGH OVER THE BULK OF NORTH AMERICA.
A TIGHT PRESSURE GRADIENT WILL PERSIST ACROSS THE GREAT PLAINS AGAIN TODAY AS A LEE TROUGH REMAINS ANCHORED OVER THE CENTRAL HIGH PLAINS AND HIGH PRESSURE REMAINS SITUATED ACROSS OHIO VALLEY AREA.
703 AM EDT WED SEP 16 2015 A LARGE AREA OF HIGH PRESSURE ALONG THE EAST COAST WILL WEAKEN AND MOVE EAST THIS WEEKEND.
1224 PM EDT WED SEP 16 2015 HIGH PRESSURE WILL BUILD INTO THE NORTHEAST THROUGH MUCH OF THE WORK WEEK.
612 AM CDT WED SEP 16 2015 FOR 12Z TAFS /ISSUED 331 AM CDT WED SEP 16 2015/ LATEST WATER VAPOR IMAGERY AND UPPER LEVEL ANALYSIS SHOWS A MID/UPPER LEVEL TROUGH MOVING ONTO THE WESTERN COAST WITH A RIDGE OVER TEXAS. WHILE DEEPLY AMPLIFIED RIDGE REMAINED ANCHORED OVER THE EASTERN HALF OF THE CONUS. A WEAK UPPER LOW WAS SITUATED OVER CENTRAL ALABAMA. THE HIGH CLOUDS SEEMS TO BE KEEPING THINGS SOMEWHAT MILD ACROSS THE TN VALLEY. THE UPPER LOW OVER THE AREA WILL SHIFT NORTHEAST TODAY. AND BECOME ABSORBED IN THE UPPER RIDGE BY THURSDAY. THE TN VALLEY WILL REMAIN UNDER THE INFLUENCE OF THE HIGH PRESSURE CENTERED ALONG THE APPALACHIAN MOUNTAINS. A WEAK AREA OF LOW PRESSURE OVER THE EASTERN GULF OF MEXICO WILL SLOWLY MOVE NORTHWEST. WITH DEWPOINTS RISING INTO THE LOW TO MID 60S DURING THE NEXT FEW DAYS.
THE PERSISTENT SOUTHWEST FLOW AHEAD OF THE MAIN TROUGH WILL CONTINUE TO PULL MOISTURE UP AND OVER THE AREA. IN ADDITION A WEAK ASSOCIATED COLD FRONT WILL APPROACH FROM THE NORTHWEST LATE IN THE AFTERNOON. THE APPROACHING COLD FRONT. THEREFORE EXPECT THAT THE STRONGEST WINDS WILL BE OVER THE HIGHER TERRAIN FROM AROUND THE CORNER OF NORTHWEST CO. THE COLD FRONT MOSTLY STALLS TO OUR NORTH/NORTHWEST LATE THIS EVENING. HOWEVER A LITTLE COOLER AIR IS FORECAST TO SPREAD INTO THE NORTH OVERNIGHT. THE MAIN TROUGH WEAKENS SOMEWHAT ON THU AND BEGINS TO SHIFT EAST. THE TROUGH AXIS IS PROGGED TO REACH WESTERN NV/ID BY 00Z FRI. TO A DEGREE OR SO COOLER. BUT TROUGH DOES NOT HAVE THE AMPLITUDE TO AFFECT THE SRN HALF OF THE FORECAST AREA.
1025 AM EDT WED SEP 16 2015 HIGH PRESSURE REMAINS OVER THE AREA THROUGH THE END OF THE WEEK.
AN UPPER LOW IS CURRENTLY LOCATED OVER EAST CENTRAL ALABAMA WITH MOST OF THE ENERGY/LIFT JUST TO OUR SOUTH AND EAST WHERE MOST OF THE SHOWER/STORM ACTIVITY IS EXPECTED TO BE TODAY. MOISTURE HAS RETURNED TO THE AREA BUT THE BEST LIFT REMAINS TO OUR SOUTH AND EAST OF A WEAK UPPER TROUGH/LOW AS IT PULLS AWAY TO THE NORTHEAST. WE HAVE SOME SCT TO BKN 4 TO 5 KFT CIGS WITH THE LOW ITSELF THAT WILL IMPACT THE NORTHERN SITES.
DESPITE THE 500MB RIDGE ACROSS NORTHERN MEXICO INTO TEXAS. RAIN CHANCES SHOULD FINALLY BEGIN TO DIMINISH TONIGHT INTO THURSDAY AS THE 500MB RIDGE ACROSS WEST TEXAS BRINGS DRIER AIR ALOFT INTO SOUTH TEXAS AND THE WEAK 500MB LOW ACROSS THE SOUTHWEST GULF OF MEXICO MOVES INLAND ACROSS EASTERN MEXICO.
723 AM EDT WED SEP 16 2015 A LARGE AREA OF HIGH PRESSURE ALONG THE EAST COAST WILL WEAKEN AND MOVE EAST THIS WEEKEND.
HIGH PRESSURE REMAINS IN CONTROL THROUGH THE TAF PERIOD AS LIGHT WINDS.
632 AM CDT WED SEP 16 2015 252 AM CDT STRONG RIDGING WILL REMAIN ANCHORED OVER THE MID ATLANTIC COAST TODAY AND TOMORROW WHILE LOW PRESSURE LIFTS NORTHEAST ACROSS THE CANADIAN PRAIRIES. AFTERNOON GUSTS INTO THE HIGH TEENS TO LOW 20 KT RANGE ARE EXPECTED. PERHAPS A DEGREE WARMER. THEN THURSDAY WILL SEE ANOTHER DEGREE OR TWO ADDED AS THE THERMAL RIDGE INCHES CLOSER. LOW PRESSURE WILL LIFT ACROSS ONTARIO TO OVER HUDSON BAY WITH A TRAILING COLD FRONT STRETCHING INTO NORTHERN ILLINOIS WHICH WILL SERVE AS THE FOCUS FOR SHOWERS AND THUNDERSTORMS.
A SHOWER OR TWO IS POSSIBLE WITH HEATING ALTHOUGH THE SRN PLAINS RIDGE SITUATED TO OUR WEST IS EXPECTED TO BUILD OVER AND EFFECTIVELY CUT OFF CONVECTIVE DEVELOPMENT. AT THE SURFACE A RIDGE IS OVER THE MID ATLANTIC COAST WITH A SE FLOW OVER THE LOCAL AREA OFF THE GULF. THE MORE STABLE AIR MASS BEHIND THE UPPER LOW WILL LINGER OVER THE REGION FOR THE NEXT FEW DAYS, HOWEVER A FEW ISOLATED THUNDERSTORMS MAY STILL OCCUR TODAY, BUT MAINLY ALONG THE SEA BREEZE. THURSDAY AND FRI AN UPPER RIDGE WILL NUDGE IN FROM NORTH MEXICO AS THE UPPER LOW MOVES EAST DECREASING RAIN CHANCES FARTHER FROM THE MINIMAL CHANCE TODAY. DURING THE WEEKEND AN AREA OF LOW PRESSURE IS EXPECTED TO MOVE FROM THE PLAINS TO THE GREAT LAKES AS A SHORT WAVE MOVES ACROSS THE CENTRAL SECTIONS OF THE COUNTRY.
1106 AM EDT WED SEP 16 2015 HIGH PRESSURE REMAINS IN CONTROL WITH LIGHT WINDS. WEAK COLD FRONT CROSSES OVER THE WEEKEND.
INCLUDED ISOLATED THUNDERSTORMS ACROSS SOUTHEAST IDAHO THIS MORNING AND AFTERNOON ALONG COLD FRONT. A BAND OF PRECIPITATION FORMING ALONG A COLD FRONT EXTENDING INTO CENTRAL NEVADA WILL CONTINUE. STRONG WINDS ARE EXPECTED ALONG AND BEHIND THE COLD FRONT THIS MORNING. BUT ANTICIPATING A LIGHTER INTENSITY AS THE INFLUENCE OF THE COLD FRONT WEAKENS. WE SHOULD SEE A BRIEF REPRIEVE FROM THE WET WEATHER THIS EVENING WHILE THE NEXT UPPER TROUGH SHIFTS FROM THE OR/CA COAST TO SOUTHWEST IDAHO TOMORROW MORNING. THIS WILL TRIGGER MORE SHOWERS ACROSS THE REGION WHILE THE TROUGH GETS SOME REINFORCEMENT TOMORROW AFTERNOON.
HIGHS WILL REACH THE LOWER 90S ACROSS THE WEST WHILE UPPER 80S WILL OCCUR ACROSS THE EASTERN HALF WHERE MOISTURE WILL BE SLOWER TO FILTER IN THANKS TO A LITTLE MORE EASTERLY FLOW. UPPER LEVEL RIDGING CENTERED ACROSS THE BIG BEND REGION OF TEXAS WILL BUILD EASTWARD ON THURSDAY. /28/ THE SUBTROPICAL RIDGE WILL CONTINUE OVER THE ARKLAMISS RESULTING IN MORE RAIN-FREE AND INCREASINGLY HOT WEATHER AS WE GO THROUGH THE WEEKEND. MODELS HAVE BEEN CONSISTENT WITH THE DEPICTION OF AN INTENSIFYING LOW LEVEL THERMAL RIDGE OVER THE LOWER MS VALLEY WITH H850 TEMPS APPROACHING 20 DEG C.
1049 AM CDT WED SEP 16 2015 252 AM CDT STRONG RIDGING WILL REMAIN ANCHORED OVER THE MID ATLANTIC COAST TODAY AND TOMORROW WHILE LOW PRESSURE LIFTS NORTHEAST ACROSS THE CANADIAN PRAIRIES. AFTERNOON GUSTS INTO THE HIGH TEENS TO LOW 20 KT RANGE ARE EXPECTED. PERHAPS A DEGREE WARMER. THEN THURSDAY WILL SEE ANOTHER DEGREE OR TWO ADDED AS THE THERMAL RIDGE INCHES CLOSER. LOW PRESSURE WILL LIFT ACROSS ONTARIO TO OVER HUDSON BAY WITH A TRAILING COLD FRONT STRETCHING INTO NORTHERN ILLINOIS WHICH WILL SERVE AS THE FOCUS FOR SHOWERS AND THUNDERSTORMS.
745 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL STAY PARKED OVER THE MID ATLANTIC STATES INTO THE UPCOMING WEEKEND.
827 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL PROVIDE DRY AND WARM WEATHER FOR THE REST OF THE WEEK. LARGE RIDGE ACROSS THE EASTERN CONUS WILL PROVIDE ANOTHER SUNNY DAY. HIGH TEMPERATURES SHOULD BE A DEGREE OR TWO WARMER THAN YESTERDAY. RIDGING WILL CONTINUE ACROSS THE MID ATLANTIC AND NORTHEAST CONUS THROUGH THE PERIOD. DRY AND WARM CONDITIONS ARE EXPECTED INTO THE BEGINNING OF THE WEEKEND WITH UPPER LEVEL RIDGE ACROSS THE EASTERN CONUS. THE UPPER FLOW IS PROGGED TO FLATTEN OVER THE WEEKEND AS THE RIDGE MOVES EAST.
A STRONG HIGH PRESSURE RIDGE TO THE NORTH OF THE FCST AREA THIS MORNING WEAKENS SLIGHTLY AND SHIFTS EAST A LITTLE THROUGH TONIGHT. THIS WILL MAINTAIN THE LOW LEVEL EAST TO NORTHEAST WINDFLOW ACROSS THE REGION THROUGH TONIGHT. LOW PRESSURE NOTED IN SATELLITE IMAGERY THIS MORNING OVER CENTRAL ALABAMA IS EXPECTED TO MOVE EAST INTO GEORGIA LATE TODAY AND TONIGHT. WITH THE LOCATION OF THE UPPER LOW. LOWS TONIGHT RANGING FROM THE MID 60S OVER FAR INLAND COUNTIES TO THE LOWER 70S AT THE COAST.
A 12Z surface analysis this morning shows a weak converge boundary and tight dewpoint gradient along the remnants of this past weekend's cold front.
LIGHT SE SFC FLOW IS EXPECTED WITH HIGH PRESSURE RIDGE ALONG THE APPALACHIAN MOUNTAINS.
/ISSUED 401 AM EDT WED SEP 16 2015/ 7Z WV LOOP DEPICTS DEEP SHRTWV TROUGH OVER SOUTHERN ALABAMA. SHRTWV TROUGH ONLY SLOWLY PUSHING EASTWARD.
CHATTANOOGA AIRPORT, TN 84 58 84 61 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 82 54 82 59 / 0 0 0 0 OAK RIDGE, TN 82 55 83 58 / 0 0 0 0 TRI CITIES AIRPORT, TN 82 48 81 53 / 0 0 0 0.
649 AM CDT WED SEP 16 2015 The overall pressure pattern across central Illinois looks to favor dry and mostly sunny conditions today as the area remains between high pressure east of IL and elongated low pressure in the Plains. Weak warm air advection ahead of the low is generating some lift as far east of western IL, which is evident in some weak radar returns just northwest of Knox and Stark counties.
724 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL BUILD INTO THE NORTHEAST THROUGH MUCH OF THE WORK WEEK.
927 AM EDT WED SEP 16 2015 HIGH PRESSURE WILL BUILD INTO THE NORTHEAST THROUGH MUCH OF THE WORK WEEK.
DRY HIGH PRESSURE WILL KEEP CONDITIONS MAINLY VFR AS GENERALLY LIGHT SSE WINDS CONTINUE. DRY WX WILL CONTINUE WITH HIGHS MOSTLY IN THE LOW TO MID 80S.
THERE IS ENOUGH LIFT IN SW FLOW FOR SHOWERS ACROSS THE HIGHEST TERRAIN OF CENTRAL IDAHO. THE NEXT MOIST UPPER LEVEL TROUGH WILL BE THE CHILLIEST.
AN UPPER LEVEL TROUGH WILL MAINTAIN A COOL AND SOMEWHAT UNSETTLED AIR MASS OVER THE REGION TODAY. A STRONGER LOW PRESSURE SYSTEM WILL SPREAD RAIN TO WESTERN WASHINGTON TONIGHT.
516 AM MDT WED SEP 16 2015 BROAD SOUTHWESTERLY FLOW ALOFT WILL CONTINUE THROUGH THURSDAY AHEAD OF A TROUGH DIGGING INTO THE NORTHERN ROCKIES. THAT SYSTEM WILL PUSH A COLD FRONT THROUGH THE AREA EARLY IN THE DAY ON THURSDAY AS IT EMERGES ONTO THE NORTHERN PLAINS.
652 PM EST SUN MAR 6 2016 A PRESSURE RIDGE WILL EXTEND THROUGH THE FORECAST AREA TONIGHT AND MONDAY. THE RIDGE WILL PERSIST ALONG THE CAROLINA COAST THROUGH AT LEAST MID WEEK. STAYED ON THE COOLER SIDE OF GUIDANCE.
A 1027 MB HIGH PRESSURE SYSTEM HAS SPILLED EAST OF THE APPALACHIANS AND LIES ACROSS THE EASTERN SEABOARD. RIDGING ALONG THE SOUTHERN FLANK OF THIS SYSTEM IS BUILDING SOUTHWARD DOWN THE FLORIDA PENINSULA. TEMPERATURES ARE IN THE UPPER 60S ACROSS THE ISLAND CHAIN WITH DEWPOINTS IN THE LOWER 60S. DUE TO THE BUILDING RIDGE. AND AN APPROACHING SHORT WAVE TROUGH IN THE SOUTHWESTERN GULF. A RIDGE OF HIGH PRESSURE ACROSS THE MID ATLANTIC STATES WILL MOVE OFF THE NORTH CAROLINA COAST OVERNIGHT AND INTENSIFY.
616 PM EST SUN MAR 6 2016 A RIDGE OF HIGH PRESSURE WILL BUILD OVER THE STATE TODAY.
LOW LEVEL FLOW AROUND THE BACK SIDE OF HIGH PRESSURE TO THE EAST AND LOW PRESSURE TO THE NORTHWEST SPREADING LOWER CLOUDS/CEILINGS AROUND 5-6 KFT OVER THE AREA. AS THE RIDGE MOVES EWD AND A STORM SYSTEM MOVES ONTO THE W COAST.
941 PM EST SUN MAR 6 2016 HIGH PRESSURE WILL EXTEND ACROSS THE AREA THROUGH THE WEEK. HIGH PRESSURE WILL PROVIDE MOSTLY CLEAR SKIES. CHARACTERIZED BY AN IMPRESSIVE MID-UPPER LEVEL RIDGE BECOMING SITUATED ACROSS THE EASTERN U. WITH A LARGE UPPER LEVEL CYCLONE CUTTING OFF ACROSS NORTHERN OLD MEXICO. LARGE HIGH PRESSURE WILL EXTEND WEST ACROSS THE SOUTHEAST U.
812 PM EST SUN MAR 6 2016 HIGH PRESSURE WILL CONTINUE TO BUILD OVER THE WESTERN ATLANTIC WATERS TONIGHT ALLOWING FOR THE NORTHEAST WINDS TO CONTINUE OVER SOUTH FLORIDA ALONG WITH DRY WEATHER.
649 PM EST SUN MAR 6 2016 HIGH PRESSURE WILL BUILD ACROSS THE REGION FROM THE WEST TONIGHT BEFORE SETTLING ACROSS THE SOUTHEAST COAST MONDAY. A WARM FRONT WILL PASS OVER THE REGION MONDAY. BRINGING WARMER THAN NORMAL TEMPERATURES TO THE REGION THAT WILL LAST THROUGH THE REST OF THE WEEK.
850 PM MST SUN MAR 6 2016 NEGATIVELY TILTED TROF IS WORKING SLOWLY WEST TO EAST THROUGH THE AREA THIS EVENING. AT THE SURFACE A COLD FRONT HAS PUSHED JUST EAST OF BILLINGS IN THE PAST HOUR. FALLING TO THE LOWER 40S OVER WESTERN FOOTHILLS ON THE OTHER SIDE. TEMPERATURES WILL BE COOLER BUT WILL STILL REMAIN SLIGHTLY ABOVE NORMAL. PRIMARILY FOR THE HIGH COUNTRY.