Aikyam-Lab/Synoptic-Bench huggingface dataset:
1038 PM EST THU FEB 11 2016 MOISTURE WILL INCREASE TONIGHT AHEAD OF WEAK LOW PRESSURE. THE LOW WILL BE NEAR THE SOUTH CAROLINA COAST EARLY FRIDAY THEN MOVE FARTHER OFFSHORE FRIDAY AFTERNOON. MUCH OF THE MOISTURE ASSOCIATED WITH THE LOW WILL BE EAST OF THE FORECAST AREA. MUCH OF THE MOISTURE WITH THIS LOW WILL REMAIN EAST OF THE CWA. MOST AREAS ACROSS THE CENTRAL AND SOUTH WILL BE AT OR ABOVE FREEZING. TEMPERATURES ACROSS THE NORTHEAST AT SUNRISE WILL BE NEAR OR SLIGHTLY BELOW FREEZING. MODELS DO BRING IN A LIGHT MIXTURE OF RAIN/SNOW/ICE PELLETS/FREEZING RAIN OVER PORTIONS OF THE NORTHEAST BETWEEN 12Z AND 17Z. DRYING WILL BEGIN BY THE AFTERNOON AS THE LOW PUSHES AWAY FROM THE AREA. AFTERNOON HIGHS CLIMB INTO THE LOWER 40S NORTH.
302 PM MST THU FEB 11 2016 HIGH PRESSURE CENTERED OVER THE GREAT BASIN AND DOMINATING WEATHER ACROSS MOST OF THE WESTERN U. THE TRAILING EDGE OF A WEAK WAVE RIDING DOWN THE EASTERN PERIPHERY OF THIS RIDGE WILL BRING SOME HIGH AND MID LEVEL CLOUDS TO NORTHERN AND CENTRAL CO BUT NO PRECIP IS EXPECTED. FRIDAY AND FRIDAY NIGHT THE RIDGE OVER UTAH FLATTENS AS A WAVE WORKS INTO THE PACIFIC NORTHWEST.
HIGH PRESSURE WILL REMAIN OVER THE INTERMOUNTAIN WEST THROUGH FRIDAY. WATER VAPOR LOOP SHOWS A RIDGE DOMINATING THE WEST. A STRONG RIDGE REMAINS IN PLACE OVER THE GREAT BASIN THIS AFTERNOON. WILL ALLOW LATER SHIFTS TO MONITOR TRENDS AS THE HIGH CLOUDS MAY AFFECT THE COVERAGE OF DENSE FOG. COOLER AIR ALOFT WILL GRADUALLY ERODE THE INVERSIONS FROM ABOVE.
THE WEEKEND WILL BE FAIRLY QUIET WEATHER AS HIGH PRESSURE BUILDS IN THEN SHIFTS EAST.
CURRENT WATER VAPOR IMAGERY INDICATES A TROUGH NEAR IOWA AND MISSOURI WITH SNOW DEVELOPING IN THE VICINITY OF THIS UPPER LEVEL SYSTEM. CHATTANOOGA AIRPORT, TN 30 50 25 34 / 10 10 10 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 28 41 22 27 / 20 40 20 10 OAK RIDGE, TN 27 40 21 28 / 40 50 10 0 TRI CITIES AIRPORT, TN 21 35 16 24 / 30 70 40 10 TN.
A WEAK COLD FRONT WILL CONTINUE TO WORK SLOWLY SWD THROUGH THE REGION OVERNIGHT AS IT BACKDOORS ITS WAY IN ACROSS NE LA AND ALONG THE I-20 CORRIDOR THIS EVENING. /ISSUED 306 PM CST THU FEB 11 2016/ WEAK COLD FRONT CONINTUES TO MAKE ITS WAY SLOWLY SWD UNDER NWLY FLOW ALOFT THIS AFTERNOON. WITH DEWPOINTS RECOVERING INTO THE LOW TO MID 40S TONIGHT ACROSS OUR SRN AREAS.
THIS IS MOST LIKELY RELATED TO AN INVERTED TROUGH THAT IS EVIDENT IN THE LATEST HOURLY RAP SURFACE ANALYSIS OVER WESTERN TN. EXPECT TEMPS TO BOTTOM OUT IN THE MID TO UPPER 20S FOR THE NORTHERN HALF AND AROUND THE FREEZING MARK FOR THE SOUTHERN HALF OF THE AREA. WITH WEAK HIGH PRESSURE SETTLING INTO THE TN/OH VALLEY REGIONS.
ARCTIC HIGH PRESSURE CURRENTLY OVER NRN SASK WILL DVDLP SWD INTO THE AREA DURING THE DAY ON FRIDAY AND WE WILL GENERALLY SEE STEADY OR SLOWLY FALLING TMPS WITH THE LOW- LEVEL CAA ON FRI. BUT JUST HOW FAR E THE MID-LVL RIDGE FLATTENS IS STILL IN DOUBT. GIVEN THE UNCERTAINTY OF THE WARMING WILL TREND WILL TREND A BIT COOLER WITH TMPS. PREVAILING S OR SE WINDS AT THE TAF SITES WILL BECOME NLY WITH THE PASSAGE OF THIS LOW PRESSURE.
928 PM CST THU FEB 11 2016 WEAK COLD FRONT HAS BECOME QUASI STNRY OVER SOUTHERN CWA. A WEAK COLD FRONT WILL CONTINUE TO WORK SLOWLY SWD THROUGH THE REGION OVERNIGHT AS IT BACKDOORS ITS WAY IN ACROSS NE LA AND ALONG THE I-20 CORRIDOR THIS EVENING. /ISSUED 306 PM CST THU FEB 11 2016/ WEAK COLD FRONT CONINTUES TO MAKE ITS WAY SLOWLY SWD UNDER NWLY FLOW ALOFT THIS AFTERNOON. WITH DEWPOINTS RECOVERING INTO THE LOW TO MID 40S TONIGHT ACROSS OUR SRN AREAS.
WINDS WILL CONTINUE IN THE HIGH COUNTRY INTO THIS EVENING. NO CHANGES TO PATTERN SO WILL LIKELY SEE SOME GUSTY WINDS IN THE HIGH COUNTRY TOMORROW. WE WILL BE ON THE EXTREME WEST SIDE OF THIS HIGH PRESSURE. SO SOME COOLER AIR IS EXPECTED TO SETTLE ACROSS NORTHEAST COLORADO.
A COLD FRONT IS STILL EXPECTED TO MOVE ACROSS THE OKLAHOMA AND TEXAS PANHANDLES THIS EVENING WHICH WILL SHIFT SOUTHERLY WINDS TO A MORE NORTHERLY DIRECTION. UPPER LEVEL RIDGING CONTINUES OVER THE WESTERN US WHICH HAS PROVIDED DOWNSLOPING NORTHWEST FLOW FOR THE PANHANDLES AND TEMPS INTO THE 60S AND EVEN SOME PLACES REACHING 70.
907 AM EDT FRI APR 24 2015 A COLD FRONT CONTINUES TO MOVE SOUTH INTO CENTRAL FLORIDA.
634 AM CDT FRI APR 24 2015 HIGH PRESSURE WILL SLIDE OFF TO THE EAST TODAY, ALLOWING A DEVELOPING STORM SYSTEM TO BEGIN TO APPROACH FROM THE WEST. AFTER CHILLY EARLY MORNING LOWS IN THE 30S, AFTERNOON HIGHS WILL REACH THE LOWER TO MIDDLE 60S. MODELS ARE IN GOOD AGREEMENT THAT THE LOW WILL BE LOCATED NEAR KANSAS CITY BY 12Z SAT, WITH WARM FRONT EXTENDING E/SE ACROSS SOUTHERN ILLINOIS. HAVE THEREFORE INCLUDED THUNDER MENTION AFTER MIDNIGHT, PARTICULARLY ACROSS THE SOUTHERN HALF OF THE AREA IN CLOSER PROXIMITY TO THE STRONGEST FORCING ALONG THE WARM FRONT.
752 AM EDT FRI APR 24 2015 UPPER LEVEL LOW PRESSURE WILL KEEP UNSETTLED CONDITIONS ACROSS THE REGION TODAY THROUGH THE WEEKEND. UPPER LEVEL LOW PRESSURE WILL REMAIN ACROSS THE REGION TODAY THROUGH TONIGHT KEEPING UNSETTLED CONDITIONS ACROSS THE FORECAST AREA. THE COLD POOL ALOFT WITH THE UPPER LOW WILL ALLOW A LIGHT RAIN/SNOW MIX EARLY TONIGHT TO TRANSITION TO LIGHT SNOW ACROSS NORTHERN PORTIONS OF THE FORECAST AREA OVERNIGHT WITH SNOW ACCUMULATIONS OF UP TO AROUND AN INCH AGAIN POSSIBLE. HIGH TEMPERATURES TODAY WILL RANGE FROM THE LOWER 40S NORTH. LOW TEMPERATURES TONIGHT WILL RANGE FROM AROUND 30 TO THE LOWER 30S NORTH. TO THE LOWER TO MID 30S DOWNEAST.
CHATTANOOGA AIRPORT, TN 71 55 75 62 / 10 80 90 40 KNOXVILLE MCGHEE TYSON AIRPORT, TN 70 51 72 58 / 10 70 90 60 OAK RIDGE, TN 70 51 72 58 / 10 70 90 50 TRI CITIES AIRPORT, TN 68 45 66 53 / 0 30 90 70.
1012 AM EDT FRI APR 24 2015 HIGH PRESSURE IN CONTROL INTO TONIGHT. LOW PRESSURE RIDES EAST ALONG FRONTAL BOUNDARY AND PASSES SOUTHERN WV LATE SATURDAY NIGHT.
/ISSUED 324 AM EDT FRI APR 24 2015/ HIGH PRESSURE WILL WILL OFF THE SOUTHEAST COAST TODAY AS THE NEXT FRONTAL SYSTEM BEGINS TO APPROACH FROM THE WEST. A STATIONARY BOUNDARY CURRENTLY ACROSS THE FLORIDA/GA LINE WILL BEGIN TO MOVE NORTH AS A WARM FRONT LATER TONIGHT AND EARLY SATURDAY. ANOTHER ROUND OF CONVECTION IS POSSIBLE LATER IN THE AFTERNOON ALONG AND AHEAD OF A COLD FRONT. THERE IS SOME QUESTION ON EXACTLY HOW FAST AND HOW FAR THE WARM FRONT WILL MOVE NORTH. SO CONFIDENCE ON THE NORTHWARD PROGRESSION OF THE WARM FRONT IS LOW AT THIS TIME. THE SECOND ROUND OF CONVECTION IS EXPECTED TO DEVELOP IN THE MID TO LATE AFTERNOON ALONG THE COLD FRONT. THE AFTERNOON EVENT WILL BE ALONG AND AHEAD OF A COLD FRONT.
IN THE LOW LEVELS OF THE ATMOSPHERE. A TROUGH OF LOW PRESSURE WILL BE LOCATED OVER THE BAHAMAS THIS AFTERNOON. AN AREA OF HIGH PRESSURE WILL BE CENTERED OVER THE YUCATAN CHANNEL TODAY. A RIDGE OF HIGH PRESSURE WILL BE LOCATED OVER THE CENTRAL GULF OF MEXICO THIS AFTERNOON.
1012 AM EDT FRI APR 24 2015 HIGH PRESSURE WILL BUILD OVER THE AREA THROUGH TONIGHT. THE HIGH WILL MOVE OFFSHORE SATURDAY AS DEVELOPING LOW PRESSURE APPROACHES FROM THE WEST.
905 AM EDT FRI APR 24 2015 HIGH PRESSURE WILL REMAIN IN CONTROL OF THE WEATHER TODAY. AN AREA OF LOW PRESSURE WILL TRACK ACROSS THE OHIO VALLEY ON SATURDAY.
THE UPPER LEVEL TROUGH THAT BROUGHT THESE SUCCESSIVE SYSTEMS THROUGH MOVES EAST WITH AN UPPER LEVEL RIDGE BUILDING OVER THE AREA RETURNING THE REGION TO A WARM AND DRY PATTERN. HIGH PRESSURE WILL BUILD IN SATURDAY.
914 AM EDT FRI APR 24 2015 UPPER LEVEL LOW PRESSURE WILL KEEP UNSETTLED CONDITIONS ACROSS THE REGION TODAY THROUGH THE WEEKEND. UPPER LEVEL LOW PRESSURE WILL CONTINUE TO SPIN ACROSS THE REGION TODAY. EXCEPT THERE WILL BE SOME SNOW THIS MORNING ESPECIALLY ACROSS THE HIGHER TERRAIN OF THE NORTH AND WEST. UPPER LEVEL LOW PRESSURE WILL REMAIN ACROSS THE REGION TODAY THROUGH TONIGHT KEEPING UNSETTLED CONDITIONS ACROSS THE FORECAST AREA. THE COLD POOL ALOFT WITH THE UPPER LOW WILL ALLOW A LIGHT RAIN/SNOW MIX EARLY TONIGHT TO TRANSITION TO LIGHT SNOW ACROSS NORTHERN PORTIONS OF THE FORECAST AREA OVERNIGHT WITH SNOW ACCUMULATIONS OF UP TO AROUND AN INCH AGAIN POSSIBLE. HIGH TEMPERATURES TODAY WILL RANGE FROM THE LOWER 40S NORTH. LOW TEMPERATURES TONIGHT WILL RANGE FROM AROUND 30 TO THE LOWER 30S NORTH. TO THE LOWER TO MID 30S DOWNEAST.
917 AM EDT FRI APR 24 2015 HIGH PRESSURE ACROSS THE AREA WILL MOVE EAST TONIGHT AND ALLOW LOW PRESSURE TO MOVE THROUGH THE LOWER OHIO VALLEY ON SATURDAY.
702 AM EDT FRI APR 24 2015 HIGH PRESSURE ACROSS THE AREA WILL MOVE EAST TONIGHT AND ALLOW LOW PRESSURE TO MOVE THROUGH THE LOWER OHIO VALLEY ON SATURDAY.
1216 PM EDT FRI APR 24 2015 HIGH PRESSURE ACROSS THE AREA WILL MOVE EAST TONIGHT AND ALLOW LOW PRESSURE TO MOVE THROUGH THE LOWER OHIO VALLEY ON SATURDAY.
1236 PM EDT FRI APR 24 2015 UPPER LEVEL LOW PRESSURE WILL KEEP UNSETTLED CONDITIONS ACROSS THE REGION TODAY THROUGH THE WEEKEND. UPPER LEVEL LOW PRESSURE WILL CONTINUE TO SPIN ACROSS THE REGION TODAY. EXCEPT THERE WILL BE SOME SNOW MIXED IN AT TIMES ACROSS THE HIGHER TERRAIN NORTH AND WEST. UPPER LEVEL LOW PRESSURE WILL REMAIN ACROSS THE REGION TODAY THROUGH TONIGHT KEEPING UNSETTLED CONDITIONS ACROSS THE FORECAST AREA. THE COLD POOL ALOFT WITH THE UPPER LOW WILL ALLOW A LIGHT RAIN/SNOW MIX EARLY TONIGHT TO TRANSITION TO LIGHT SNOW ACROSS NORTHERN PORTIONS OF THE FORECAST AREA OVERNIGHT WITH SNOW ACCUMULATIONS OF UP TO AROUND AN INCH AGAIN POSSIBLE. HIGH TEMPERATURES TODAY WILL RANGE FROM THE LOWER 40S NORTH. LOW TEMPERATURES TONIGHT WILL RANGE FROM AROUND 30 TO THE LOWER 30S NORTH. TO THE LOWER TO MID 30S DOWNEAST.
1242 PM EDT FRI APR 24 2015 HIGH PRESSURE WILL BUILD OVER THE AREA THROUGH TONIGHT. THE HIGH WILL MOVE OFFSHORE SATURDAY AS DEVELOPING LOW PRESSURE APPROACHES FROM THE WEST.
1019 AM EDT FRI APR 24 2015 GRADUAL CLEARING SHOULD TAKE PLACE LATER THIS MORNING AND THIS AFTERNOON AS HIGH PRESSURE BUILD IN FROM THE MIDWEST.
THE HIGH PRESSURE RIDGE OVER THE GULF WAS PROVIDING A STRONGER CAP OVER THE REMAINING SITES.
A LONG WAVE TROUGH IS NOW ALONG THE PACIFIC NORTHWEST COAST WITH MOST OF THE ASSOCIATED ENERGY DIRECTED INTO BRITISH COLUMBIA AND WASHINGTON STATE. THE GENERALLY UNSETTLED SHOWERY CONDITIONS OVER THE MEDFORD CWA IS DUE TO WEAK SHORT WAVES ROUNDING THE BOTTOM OF THE TROUGH. AFTER THAT A LONG WAVE RIDGE WILL BUILD INTO THE WEST COAST. WHICH WILL BRING A FEW DAYS OF DRY AND WARMER WEATHER TO THE AREA.
851 AM MST FRI APR 24 2015 THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE TODAY AS A WEAK LOW PRESSURE SYSTEM SLOWLY EXITS THE STATE.
A WARM FRONT AND SOME UPPER LEVEL ENERGY WILL MOVE INTO AR FROM THE SOUTHWEST.
1000 AM EDT FRI APR 24 2015 HIGH PRESSURE OVER INDIANA WILL BUILD ONTO THE EAST COAST TODAY. THE HIGH WILL MOVE OFFSHORE ON SATURDAY.
623 AM CDT FRI APR 24 2015 HAND ANALYSIS OF THE 07Z MSL DATA SHOWED LOW PRESSURE CENTERED IN SOUTHEAST MONTANA AND WESTERN SOUTH DAKOTA WITH A QUASI- STATIONARY FRONT ACROSS NORTHERN NEBRASKA INTO CENTRAL MONTANA. RIDGING ALOFT WILL BUILD ACROSS THE CENTRAL PLAINS SATURDAY AHEAD OF AN APPROACHING LONG WAVE TROUGH MOVING ONTO THE WEST COAST.
AN UPPER LOW OVER THE PACIFIC NORTHWEST WILL KEEP THE WEATHER COOL AND UNSETTLED THROUGH SATURDAY.
A BROAD TROF IS OVER THE AREA AND SCATTERED SHOWERS ARE MOVING THROUGH THE CENTRAL ZONES.
THE LINE WAS ASSOCIATED WITH A COLD FRONT THAT WAS MOVING THROUGH THE WESTERN MAGIC VALLEY. MAINLY OVER THE HIGHER TERRAIN OF SW IDAHO.
505 AM MST FRI APR 24 2015 THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE TODAY AS A WEAK LOW PRESSURE SYSTEM SLOWLY EXITS THE STATE.
835 AM EDT FRI APR 24 2015 DRY AND COOL WEATHER CAN BE EXPECTED TODAY AS HIGH PRESSURE SLIDES ACROSS THE REGION. BUT THE REPRIEVE WILL BE BRIEF AS LOW PRESSURE IS FORECAST TO GENERATE RAIN ON SATURDAY. IT WILL AT LEAST BE A BOATLOAD WARMER THAN YESTERDAY. MOIST ADVECTION INCREASES AHEAD OF LOW PRESSURE ADVANCING OUT OF THE MIDWEST. SUCH A TRACK WOULD KEEP THE FORECAST AREA ALONG OR JUST NORTH OF THE ASSOCIATED WARM FRONT.
NORTHERLY SURFACE FLOW IS NOW PRESENT ACROSS ALL OF CENTRAL ALABAMA LATE THIS MORNING AS AN UPPER LEVEL TROUGH DIGS ACROSS THE SOUTHEAST STATES. THE SURFACE FRONT THAT WILL PUSH A HIGHLY ANTICIPATED COOLER AIRMASS SOUTHWARD HAS NOW ENTERED THE FAR NORTHWEST ALABAMA COUNTIES. THE HIGHEST COVERAGE WILL CONTINUE TO BE ACROSS OUR SOUTHERN AND SOUTHEAST COUNTIES WHERE AMPLE AMOUNTS OF LOW LEVEL MOISTURE WILL BE PRESENT. HAVE ONLY INCLUDED VCTS AT KTOI WHERE THE HIGHEST CHANCE FOR PRECIPITATION WILL BE. 05/MA SHOWERS AND A FEW THUNDERSTORMS WILL BE POSSIBLE ON TODAY AS A COLD FRONT MOVES THROUGH THE AREA.
924 AM EDT WED SEP 30 2015 MARINE A LARGE AREA OF HIGH PRESSURE WILL REMAIN SITUATED OVER ONTARIO AND QUEBEC INTO THE WEEKEND.
633 AM CDT WED SEP 30 2015 HIGH PRESSURE OVER THE NORTHERN GREAT LAKES REGION. AND LOW PRESSURE OVER EASTERN MONTANA IS PRODUCING A MODERATE SOUTHERLY FLOW ACROSS WESTERN AND CENTRAL NORTH DAKOTA THIS MORNING. WITH A LOW PRESSURE TROUGH IN THE LEE OF THE ROCKIES. A LARGE LOW OVER HUDSON BAY AND A RIDGE OVER THE ROCKIES RESULTED IN SLIGHT NORTHWEST FLOW ALOFT OVER NORTH DAKOTA. THIS LOW LEVEL JET EXTENDS WELL NORTHWARD INTO MANITOBA. THIS LOW LEVEL JET IS FORECAST TO REMAIN OVER THE DAKOTAS TODAY AND TONIGHT. ON THE WEST SIDE OF THE LOW LEVEL JET. WITH DAYTIME HEATING THE SURFACE LAYER SHOULD LINK WITH THE LOW LEVEL JET. THE UPPER LOW EVENTUALLY GETS PULLED NORTWARD. BUT THERE SHOULD BE ENOUGH INSTABILITY ASSOCIATED WITH THE UPPER LOW TO PRODUCE SCATTERED SHOWERS MAINLY ACROSS CENTRAL NORTH DAKOTA ON THURSDAY.
THIS LOW IS EXPECTED TO CONTINUE TO WEAKEN AS IT SHIFTS SOUTH TO SOUTHEAST AS RIDGE OF HIGH PRESSURE BUILDS SOUTHWARD OVER THE CENTRAL/EASTERN CONUS. LOW CLOUDS ASSOCIATED WITH THIS LOW WILL CONTINUE TO BREAK UP INTO LATE MORNING WITH PARTLY SUNNY SKIES EXPECTED FOR MUCH OF THE AREA INTO THE AFT.
618 AM CDT WED SEP 30 2015 HIGH PRESSURE OVER THE UPPER GREAT LAKES IS WELL ENTRENCHED OVER THE MIDWEST EARLY TODAY. WITH THE RIDGE AXIS LINING UP FROM WISCONSIN TO KANSAS. UNDER THIS HIGH PRESSURES NORTHEAST FLOW. WE SHOULD RECOVER TO THE LOWER TO MID 60S AREA WIDE. THE CENTER OF THE HIGH WILL BE LOCATED ACROSS CANADA RESULTING IN A DRY N/NE SFC FLOW LOCALLY.
SATELLITE IMAGERY SHOWED AN UPPER LEVEL TROUGH SOUTHWEST OF THE REGION. MODELS CONTINUE TO BRING THE OFFSHORE TROUGH TOWARD THE COAST TONIGHT. BOTH THE GFS AND NAM12 INDICATE SHOWER POTENTIAL OVER THE EASTERN PORTIONS OF TRINITY AND MENDOCINO COUNTIES ON THU AS THE LOW ALOFT TRACKS ACROSS THE REGION.
1231 PM EDT WED SEP 30 2015 HYDRO A LARGE AREA OF HIGH PRESSURE WILL REMAIN SITUATED OVER ONTARIO AND QUEBEC INTO THE WEEKEND.
THE LOW CLOUDS WILL CREATE MVFR/SOME IFR CONDITIONS.
LITTLE CHANGE IN THE OVERALL PATTERN THURSDAY WITH AN UPPER LEVEL TROUGH MOVING INLAND TO THE SOUTH OF THE REGION.
A RIDGE OF HIGH PRESSURE OVER THE DESERT SOUTHWEST WILL MAINTAIN A VERY WARM AIR MASS ACROSS THE GREAT BASIN THROUGH THURSDAY.
945 AM PDT WED SEP 30 2015 HIGH PRESSURE WILL KEEP ABOVE NORMAL TEMPERATURES OVER THE AREA TODAY. AN AREA OF LOW PRESSURE WILL BRING A SLIGHT CHANCE OF SHOWERS TO SAN LUIS OBISPO COUNTY THURSDAY MORNING.
949 AM CDT WED SEP 30 2015 THE UPPER LOW CAN BE SEEN ON SATELLITE AND WATER VAPOR IMAGERY ACROSS SASKATCHEWAN. UPPER LOW FORMS OVER THE S SASK/MB BORDER AREA TONIGHT. MIXING AND WARMER COLUMN WILL HOLD TEMPERATURES UP WITH FROST NOT MUCH OF A CONCERN. UPPER LOW REMAINS STATIONARY THROUGH THURSDAY SO LITTLE CHANGE IN OVERALL PATTERN.
1254 PM EDT WED SEP 30 2015 A COLD FRONT JUST SOUTH OF THE AREA WILL CONTINUE TO MOVE SOUTHEAST AND AWAY FROM THE REGION TODAY. LOW PRESSURE IS EXPECTED TO MOVE NORTHEAST ALONG THE COLD FRONT TO EASTERN MAINE BY THIS AFTERNOON.
1040 AM EDT WED SEP 30 2015 AN AREA OF LOW PRESSURE WILL INTO NEW ENGLAND TODAY FOLLOWED BY A WEAK RIDGE OF HIGH PRESSURE.
1247 PM EDT WED SEP 30 2015 LOW PRESSURE WILL TRACK ALONG THE DOWNEAST COAST THIS AFTERNOON BRINGING A SOAKING TO FLOODING RAIN TO THE AREA. THE LOW WILL EXIT INTO THE MARITIMES TONIGHT. HIGH PRESSURE WILL BUILD NORTH OF MAINE THURSDAY INTO THE WEEKEND. ORGNL DISC: LOW PRESSURE TRACKING ALONG A FRONTAL BOUNDARY OVER THE COAST WILL BRING A SOAKING RAIN TODAY AS STRONG SURFACE FRONTAL CONVERGENCE COMBINED WITH UPPER LEVEL LIFT WORK TO PRODUCE MODERATE TO HEAVY RAINFALL. THE WAVE OF LOW PRESSURE WILL EXIT INTO THE MARITIMES TONIGHT AS STRONG, CHILLY HIGH PRESSURE TO THE NORTH PUSHES THE FRONTAL BOUNDARY WELL OFFSHORE AND PUSHES COOL DRY AIR ACROSS OUR REGION.
953 AM EDT WED SEP 30 2015 A COLD FRONT JUST SOUTH OF THE AREA WILL CONTINUE TO MOVE SOUTHEAST AND AWAY FROM THE REGION TODAY. LOW PRESSURE IS EXPECTED TO MOVE NORTHEAST ALONG THE COLD FRONT TO EASTERN MAINE BY THIS AFTERNOON.
A MID-UPPER LEVEL TROUGH HAS CARVED OUT LOWER HEIGHTS DOWN THE MISSISSIPPI RIVER VALLEY INTO THE NORTHERN GULF OF MEXICO. A TROUGH WILL SETTLE DOWN THE FLORIDA PENINSULA THIS AFTERNOON THROUGH THURSDAY.
AN UPPER TROUGH WILL DIVE INTO THE TENNESSEE VALLEY EARLY THURSDAY MORNING WITH ISENTROPIC LIFT DEVELOPING SHOWERS OVER THE AREA BETWEEN 08-12Z.
The synoptic pattern during the short term looks like it remains muddied thru the period as an upper level low develops over the Tn valley with time.
AN UPPER TROUGH WILL MOVE IN. THE UPPER TROUGH WILL CONTINUE TO DEEPEN WITH A CUT OFF LOW DEVELOPING OVER THE REGION TONIGHT.
1111 AM EDT WED SEP 30 2015 RATHER COMPLEX PATTERN ACROSS THE REGION WITH A COLD FRONT TO THE NORTH MOVING THROUGH THE SOUTHEAST U. JOAQUIN TO THE EAST SOUTHEAST AND ANOTHER WEAK LOW PRESSURE SWIRLING OFF THE NORTHEAST FLORIDA COAST.
CHATTANOOGA AIRPORT, TN 77 62 70 59 / 50 30 60 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 74 60 67 58 / 50 40 60 70 OAK RIDGE, TN 74 60 67 57 / 60 40 60 70 TRI CITIES AIRPORT, TN 71 57 67 58 / 70 60 70 70.
After that, partly-mostly cloudy skies are expected today in advance of a cold front. Dewpoints will be in the lower to mid 70s which could actually produce some heat indices in the mid-90s over much of our Florida zones and into south-central Georgia.
753 AM EDT WED SEP 30 2015 AN AREA OF LOW PRESSURE OVER THE POCONOS OF NORTHEASTERN PENNSYLVANIA HAD A COLD FRONT TRAILING SOUTHWEST THROUGH THE SUSQUEHANNA VALLEY THIS MORNING. AN UPPER LEVEL TROUGH MOVING ACROSS WESTERN AND NORTHERN PENNSYLVANIA WILL BRING ADDITIONAL SHOWERS THIS MORNING.
1038 AM EDT WED SEP 30 2015 LATEST VIS IMAGERY SHOWS A WEAK LOW PRESSURE SWIRL JUST EAST OF OUR OFFSHORE WATERS. TIDAL FLOODING: MINOR FLOODING WILL CONTINUE NEAR THE HIGH TIDE THROUGH THE THURSDAY MORNING TIDE CYCLE.
CURRENT WATER VAPOR IMAGERY INDICATES AN UPPER LEVEL TROUGH CURRENTLY MOVING ACROSS CENTRAL ALABAMA AND THE SOUTHEASTERN U. THANKS TO THIS MOISTURE AND LIFT FROM THE TROUGH. THE LOW LEVELS ARE HIGHLY SATURATED WITH DEWPOINTS IN THE LOW TO MID 70S. THE COLD FRONT WILL MOVE THROUGH THE AREA TODAY ALONG WITH THE UPPER LEVEL TROUGH. IT APPEARS THAT THE BEST COVERAGE WILL BE ACROSS THE SOUTHEASTERN COUNTIES AS THE FRONT AND TROUGH MOVE THROUGH NEAR THE PEAK HEATING OF THE DAY. MODEL SOUNDING INDICATE THAT SHALLOW MOISTURE HANGS AROUND THROUGHOUT THE OVERNIGHT ACROSS THE EASTERN COUNTIES AS A TROUGH DIVES SOUTHEAST ACROSS THE MID-MISSISSIPPI RIVER VALLEY.
1018 AM EDT WED SEP 30 2015 LOW PRESSURE WILL TRACK ALONG THE DOWNEAST COAST TODAY BRINGING A SOAKING RAIN TO THE AREA. THE LOW WILL EXIT INTO THE MARITIMES TONIGHT. HIGH PRESSURE WILL BUILD NORTH OF MAINE THURSDAY INTO THE WEEKEND. ORGNL DISC: LOW PRESSURE TRACKING ALONG A FRONTAL BOUNDARY OVER THE COAST WILL BRING A SOAKING RAIN TODAY AS STRONG SURFACE FRONTAL CONVERGENCE COMBINED WITH UPPER LEVEL LIFT WORK TO PRODUCE MODERATE TO HEAVY RAINFALL. THE WAVE OF LOW PRESSURE WILL EXIT INTO THE MARITIMES TONIGHT AS STRONG, CHILLY HIGH PRESSURE TO THE NORTH PUSHES THE FRONTAL BOUNDARY WELL OFFSHORE AND PUSHES COOL DRY AIR ACROSS OUR REGION.
1019 AM EDT WED SEP 30 2015 COOLER NORTH LOW LEVEL FLOW TODAY WITH PLENTY OF LINGERING MOISTURE IN WAKE OF FRONT. WILL BE MORE PESSIMISTIC ON THE LOW CLOUDS AND FOG ON HIGH GROUND THE REST OF THE DAY.
747 AM EDT WED SEP 30 2015 AN UPPER LEVEL TROUGH AND A MOIST ATMOSPHERE WILL CONTINUE TO AFFECT OUR REGION THROUGH AT LEAST LATE WEEK. WITH ADDITIONAL PRECIPITATION ACTIVITY ALONG AND BEHIND A COLD FRONT THAT WILL COME THROUGH TONIGHT.
THE LOW AND MID-LEVELS ARE RATHER MOIST THIS MORNING WITH THE EXCEPTION OF A DRIER LAYER OF AIR NEAR 10000 FEET. WINDS IN THE LOW LEVELS ARE FROM THE NORTHEAST OR NORTH AND THEN PRIMARILY FROM THE WEST OR WEST- SOUTHWEST IN THE MID AND UPPER LEVELS. /ISSUED 346 AM CDT WED SEP 30 2015/ AN ELONGATED TROUGH AXIS ACROSS THE FORECAST AREA THIS MORNING WILL BEGIN TO PULL TO THE EAST BY THE AFTERNOON AND EVENING HOURS. AS THIS TROUGH MOVES EAST OF THE REGION. A COLD FRONT WILL MOVE THROUGH THE REGION.
611 AM CDT WED SEP 30 2015 LATEST WATER VAPOR IMAGERY AND RAP 500MB HEIGHT ANALYSIS SHOWS LARGE RIDGE OF HIGH PRESSURE EXTENDING FROM NORTHWESTERN MEXICO INTO BRITISH COLUMBIA/ALBERTA. A LARGE TROUGH EXTENDS FROM HUDSON'S BAY TO EASTERN TEXAS PUTTING OUR REGION IN MODEST NORTHWESTERLY FLOW. THE UPPER RIDGE AXIS WILL SHIFT EAST TOWARD THE FORECAST AREA BY THE WEEKEND AHEAD OF A LARGE APPROACHING UPPER TROUGH. TEMPERATURES WILL REMAIN COOLER THAN NORMAL FOR THIS TIME OF THE YEAR WITH CONTINUED EASTERLY LOW LEVEL FLOW.
OVERCAST TO BROKEN LOW CLOUDS STILL LINGER AROUND THE TN VALLEY THIS MORNING WITH TEMPS HOLDING IN THE LOWER 70S. WATER VAPOR SATELLITE SHOWS AN UPPER LEVEL LOW SPINNING ACROSS KY WITH THE TROUGH AXIS EXTENDING THROUGH THE SOUTHEAST. A SFC COLD FRONT STRETCHES FROM THE NORTHEAST BACK INTO NORTH TX. WINDS HAVE ALREADY BECOME NORTHERLY ACROSS THE CWA BUT DEWPOINTS ARE STILL IN THE MID 60S HERE AND A REAL DROP IS BEHIND THE COLD FRONT IN NORTHERN TN. LOW CLOUDS MAY PERSIST THRU THE EARLY AFTERNOON HOURS AS AN UPR TROF PIVOTS ACROSS THE AREA.
CHATTANOOGA AIRPORT, TN 78 62 70 59 / 50 30 60 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 77 60 67 58 / 50 40 60 70 OAK RIDGE, TN 76 60 67 57 / 60 40 60 70 TRI CITIES AIRPORT, TN 75 57 67 58 / 70 60 70 70.
THE LEADING EDGE OF MVFR CEILINGS ACROSS SW AR MARKS THE ADVANCE OF THIS COOLER AIRMASS BUT SOLAR EFFECTS ARE WINNING THE BATTLE FROM THIS CLOUD COVER MAKING IT INTO OUR ELD/MLU TERMINALS.
/ISSUED 331 AM CDT WED SEP 30 2015/ WITH UPPER LEVEL RIDGING TODAY. WITH AN UPPER LEVEL RIDGE CENTERED OVER THE MEXICAN STATES OF CHIHUAHUA AND SONORA.
932 AM EDT WED SEP 30 2015 RAIN WILL DIMINISH TODAY AS A COLD FRONT MOVES EAST OF THE REGION. HAVE ADJUSTED POPS BASED ON RAPID DISSIPATION OF PRECIPITATION OVER THE NORTHEAST ZONES AS THE SYSTEM OF LOW PRESSURE SHIFTS NORTHEAST THIS MORNING. MODELS ARE IN AGREEMENT OF AN UPPER LEVEL LOW FORMING OVER THE TENNESSEE VALLEY.
750 AM EDT WED SEP 30 2015 RAIN WILL DIMINISH TODAY AS A COLD FRONT MOVES EAST OF THE REGION. HAVE ADJUSTED POPS BASED ON RAPID DISSIPATION OF PRECIPITATION OVER THE NORTHEAST ZONES AS THE SYSTEM OF LOW PRESSURE SHIFTS NORTHEAST THIS MORNING. MODELS ARE IN AGREEMENT OF AN UPPER LEVEL LOW FORMING OVER THE TENNESSEE VALLEY.
445 PM PST WED JAN 20 2016 UPDATED AVIATION SECTION WARMER TEMPERATURES AND BREEZY SANTA ANA WINDS WILL RETURN THURSDAY.
After looking at the latest NAM forecast soundings, light snow and freezing drizzle seem like the best bet across far north Oklahoma and into northwest Arkansas tonight. However, some heavier freezing rain/rain may also develop across these areas. With temperatures so close to freezing and still some uncertainty in the forecast will not issue and advisory at this time. however, a few pockets below the freezing mark will see freezing rain and possibly sleet.
550 PM CST WED JAN 20 2016 ISSUED A SPECIAL WEATHER STATEMENT AND UPDATED THE GRIDS TO REFLECT REPORTS OF PATCHY DENSE FOG AND LIGHT FREEZING MIST/DRIZZLE ACROSS PARTS OF NORTH CENTRAL SOUTH DAKOTA. EXPECT THE LOW CLOUDS ALONG WITH SOME FOG TO REMAIN AS SNOW BEGINS TO DEVELOP OUT WEST. THE MODELS SHOW A SHORT WAVE TROUGH DROPPING IN FROM THE NORTHWEST TONIGHT AND ACROSS THE REGION THROUGH THURSDAY. LIFT FROM THIS TROUGH WILL ENHANCE SNOWFALL ACROSS MUCH OF THE CWA INTO THURSDAY AFTERNOON.
AN UPPER LEVEL RIDGE HAS BUILT OVER THE REGION TODAY AND AN UPPER LEVEL TROUGH HAS DEEPENED OFF THE COAST. THIS SYSTEM WILL SEND A WARM FRONT THROUGH THE REGION OVERNIGHT AND LIFT INTO NORTHERN WASHINGTON ON THURSDAY. PRECIPITATION TYPE WILL MAINLY BE RAIN OR SNOW BUT COULD SEE SOME POCKETS OF FREEZING RAIN IN VALLEY AREAS FROM YAKIMA NORTHWARD. ICE ACCUMULATIONS WILL MINIMAL AS LOW TEMPERATURES WILL BE RIGHT AT OR NEAR FREEZING SO IT IS NOT A SITUATION WHERE MUCH IF ANY ICE BUILD UP IS EXPECT ON THE ROADS.