Aikyam-Lab/Synoptic-Bench huggingface dataset:
246 PM EDT FRI APR 10 2015 A WARM FRONT HAS PUSHED THROUGH SOUTHERN VIRGINIA AND INTO LOWER SOUTHERN MARYLAND. THIS WILL CONTINUE TO TRACK SLOWLY NORTH BEFORE A COLD FRONT PUSHES THROUGH THE MID ATLANTIC THIS EVENING. HIGH PRESSURE WILL BUILD INTO THE AREA FOR THE WEEKEND.
COLD FRONT WILL CONTINUE TO MOVE SOUTHEAST THROUGH THE AREA THIS EVENING.
215 PM PDT FRI APR 10 2015 THE WEEKEND TEMPERATURES WILL WARM TO AROUND NORMAL AS HIGH PRESSURE MOVES IN. HIGH PRESSURE WITH WEAK OFFSHORE FLOW WILL BUMP TEMPERATURES TO WELL ABOVE NORMAL. AFTER TODAY'S COOLER CONDITIONS THANKS TO A STRONGER ONSHORE FLOW AND A HEIGHT MINIMUM DUE TO THE TROUGH EXTENSION FROM THE CLOSED LOW TO OUR WEST MOVING TOWARD BAJA. WE WARM UP TOMORROW DUE TO WEAK RIDGING. WITH THE CLOSED LOW FINALLY MOVING SOUTH OVER BAJA LATE SATURDAY.
A SECOND UPPER LOW OVER NORTHERN MINNESOTA SHOULD MOVE INTO SOUTHWEST WISCONSIN BY LATE AFTERNOON AND WEAKEN.
MAIN NORTHERN STREAM FLOW SPLITS OVER THE NORTHEAST PACIFIC PUSHING ACROSS CANADA THEN DIPPING SOUTH OVER THE GREAT LAKES TONIGHT AS A PROGRESSIVE TROUGH EXITS EAST ACROSS THE NORTHEAST U. SUBTROPICAL U/L RIDGE WILL EXTEND OVER THE GULF OF MEXICO AND FLORIDA BUT WILL BE SUPPRESSED A BIT SOUTH ON SATURDAY AS THE TROUGH PASSES NORTH OF THE REGION. A COLD FRONT WILL APPROACH AND STALL ACROSS NORTH FLORIDA ON SATURDAY ASSOCIATED WITH THE MID ATLANTIC U/L TROUGH. TEMPS WILL GENERALLY BE IN THE MID TO UPPER 80S MOST DAYS WITH SLIGHTLY COOLER TEMPS ALONG THE IMMEDIATE COAST.
247 PM MDT FRI APR 10 2015 A MOISTURE-STARVED UPPER DISTURBANCE WAS CROSSING WRN CO THIS AFTERNOON BRINGING SOME HIGH CIRRUS CLOUDS TO THE REGION WHILE DAYTIME HEATING AND WEAK INSTABILITY AS GENERATING SOME HIGH- BASED CUMULUS OVER AND NEAR THE HIGHER TERRAIN. SATELLITE WATER VAPOR IMAGES THIS AFTERNOON SHOWED AN UPPER LOW SOUTHWEST OF CA NEAR 130W/30N WHILE AN UPPER TROUGH ALONG THE BRITISH COLUMBIA/PAC NW COAST WAS POISED TO MOVE INLAND. THE UPPER LOW IS EXPECTED TO MOVE OVER SRN CA/NRN BAJA SATURDAY AFTERNOON.
STILL LOOKING AT AN UNSTABLE ENVIRONMENT AHEAD OF THE COLD FRONT THOUGH DRY AIR HAS MIXED SOME OF THE MOISTURE OUT THROUGH THE BOUNDARY LAYER.
1020 AM PDT FRI APR 10 2015 THE WEEKEND TEMPERATURES WILL WARM TO AROUND NORMAL AS HIGH PRESSURE MOVES IN. HIGH PRESSURE WITH WEAK OFFSHORE FLOW WILL BUMP TEMPERATURES TO ABOVE NORMAL. SPIT OUT AHEAD OF THE CLOSED UPPER LEVEL LOW THAT CONTINUES TO MOVE SOUTHEAST TOWARD BAJA. SURFACE PRESSURE GRADIENTS HAVE BECOME MORE ONSHORE JUST AS ADVERTISED AND THE COOLER TEMPERATURES SO FAR REFLECT THAT TREND.
HIGH PRESSURE DRIFTING SLOWLY THROUGH THE REGION WILL ENSURE A COOLER AND LESS HUMID START TO THE WEEKEND. ESP ON SUN AS WINDS TURN SOUTHERLY ON THE WEST SIDE OF THE HIGH. MODELS DO TEND TO AGREE THAT ANOTHER COLD FRONT WILL MOVE IN TO START THE WORK WEEK.
RIDGE IN PROXIMITY WL BREAK WITH APCH OF A SURFACE FRONT OVER N FL. HIGH PRESSURE WILL SHIFT OFF THE EASTERN SEABOARD MON WITH RIDGE AXIS SETTLING INTO THE AREA TUE AS ANOTHER WEAK FRONTAL BOUNDARY STALLS OUT VICINITY NORTH FLORIDA. FAVORABLE BOATING CONDS EXPECTED THROUGH THE PERIOD AS WEAKENING HIGH PRESSURE ACROSS THE REGION SHIFTS SOUTHWARD DURING THE WEEKEND.
102 PM EDT FRI APR 10 2015 THE COLD FRONT THAT MOVED THROUGH THE AREA THIS MORNING CONTINUES TO MOVE EAST OF THE AREA. A SECONDARY SURGE OF COOLER AIR WILL MOVE IN THIS EVENING.
/ISSUED 312 AM CDT FRI APR 10 2015/ FLATTENING UA RIDGING WILL BE PROGRESSING OVERHEAD TODAY. A BACKDOOR COLD FRONT HAS PUSHED SOUTH ACROSS THE SOUTHERN PLAINS LATE LAST NIGHT AND HAS SINCE MOVED TO ACROSS THE DAVIS MOUNTAINS AND EDWARDS PLATEAU AREAS PER 07Z METARS. 75 INCHES /ESPECIALLY ACROSS THE SRN AND ERN ZONES/ ALL AID IN MOISTENING THE LOW LEVELS AS WELL AS PROMOTING A CHANCE OF PRECIP ACROSS PORTIONS OF THE THE SRN AND ERN ZONES. DUE TO THE INFILTRATION OF THE LOW LEVEL MOISTURE. OR SOME 8-10 DEGREES COOLER THAN YESTERDAY.
WITH UPPER RIDGING IN ITS WAKE ACROSS THE NRN PLAINS. SURFACE ANALYSIS SHOWS HIGH PRESSURE IN CONTROL OVER THE CENTRAL PLAINS. A COLD FRONT WILL CROSS THE AREA LATE SAT NIGHT.
COLD FRONT IS CLOSE TO PUSHING OFFSHORE AT THIS TIME.
417 PM CDT FRI APR 10 2015 THE COLD FRONT HAS PUSHED OFF THE SE TX COAST AS OF 20Z. AND THIS FARTHER SWD POSITION SHOULD RESULT IN A SLIGHTLY SLOWER RETURN OF MOISTURE AS IT BEGINS TO WORK BACK N AS A WARM FRONT SATURDAY. PREFER THE GFS HANDLING OF THE SLOWER NWD RETURN OF THE WARM FRONT SATURDAY.
304 PM CDT FRI APR 10 2015 THE 20Z SURFACE ANALYSIS INDICATED THAT THE COLD FRONT WAS NOW THROUGH THE FORECAST AREA. SKIES REMAINED MOSTLY CLOUDY ACROSS THE AREA WITH TEMPS RANGING FROM AROUND 70/LOWER 70S JUST BEHIND THE COLD FRONT. TO THE MID-UPPER 60S BEHIND THE COLD FRONT IN NORTHWEST ALABAMA/SOUTHERN MIDDLE TENNESSEE. EXPECT THAT CLOUDS WILL CONTINUE TO CLEAR AS WE HEAD INTO THE EVENING HOURS AS A BROAD AREA OF HIGH PRESSURE MOVES INTO THE TENNESSEE VALLEY REGION. THE MODELS ARE IN GOOD AGREEMENT INVOLVING MOVING THE AREA OF HIGH PRESSURE ACROSS THE OHIO AND TENNESSEE VALLEY REGION THROUGH THE WEEKEND. THE RIDGE WITH INCREASED LOW LEVEL MOISTURE EXPECTED TO SLOWLY MOVE NORTHWARD TOWARD THE FORECAST AREA.
1252 PM CDT Fri Apr 10 2015 Sunny skies prevail across central Illinois this morning in the wake of a strong cold front pushing into the Appalachians. Further upstream, a secondary cold front dropping into northern Iowa is expected to swing through the area this afternoon.
254 PM CDT FRI APR 10 2015 WARMER TEMPERATURES AND INCREASING LOW LEVEL MOISTURE WILL RETURN TO THE REGION TONIGHT INTO SATURDAY AS HIGH PRESSURE MOVES EAST OF THE AREA INTO THE OHIO VALLEY AND UPPER FLOW BECOMES MORE WESTERLY.
527 PM EDT FRI APR 10 2015 A WEAK DISTURBANCE WILL INCREASE SHOWER CHANCES TONIGHT BEFORE HIGH PRESSURE BRINGS DRY WEATHER FOR THE WEEKEND. YET ANOTHER SHORT WAVE TROUGH WILL AFFECT THE REGION BY MIDNIGHT. A WINDY AND RAW SHOWERY PATTERN IS EXPECTED NORTH OF PITTSBURGH WITH THE PASSAGE OF THIS SECOND SHORT WAVE TROUGH OVERNIGHT. BEHIND THE SECOND SHORT WAVE TROUGH. WHICH WILL BE A PRELUDE INTO A MUCH QUIETER AND COOLER SATURDAY. FRIES HIGH PRESSURE IS PROGGED TO BUILD IN UNDER AN UPPER TROUGH SATURDAY WITH DRY WEATHER EXPECTED.
125 PM EDT FRI APR 10 2015 AVIATION A DEEPENING SPRING STORM SYSTEM WILL BE DEPARTING THE AREA TODAY BUT AS IT DEPARTS EXPECT STRONG WINDS AND COOLER TEMPERATURE WITH MOSTLY CLOUDY SKIES.
152 PM EDT FRI APR 10 2015 HIGH PRESSURE WILL BUILD INTO THE AREA BEHIND THE FRONT TODAY. SFC COLD FRONT HAS PUSHED EAST OF ILN/S FA WITH ALL PRECIPITATION COMING TO AN END. SHARP H5 TROF DIGS INTO THE GREAT LAKES TONIGHT BRINGING WITH IT A SECONDARY TROF. ALONG THIS TROF THERE WILL BE A SLIGHT CHANCE OF RAIN SHOWERS IN THE EXTREME NORTHERN COUNTIES FOR THE FIRST HALF OF TONIGHT. THE CORE OF THE HIGH PRESSURE BUILDS IN FOR THE LATER PART OF TONIGHT. THE HIGH WILL PROVIDE PLENTY OF SUNSHINE FOR SATURDAY AND CLEAR SKIES SATURDAY NIGHT.
158 PM EDT FRI APR 10 2015 A FEW SHOWERS HAVE FORMED ALONG THE COLD FRONT AND ARE CURRENTLY PUSHING ACROSS SOUTHEASTERN KY AS OF 1130 AM. THE LATEST SURFACE MAP FEATURES DEEP LOW PRESSURE WRAPPING INTO MICHIGAN. WITH A COLD FRONT ALIGNED SOUTH AND THEN SOUTHWEST. TWO DISTINCT SHORT WAVE TROUGHS ARE ROTATING THROUGH WITHIN THE NORTHERN STREAM. PLENTY OF CONVECTION HAS BEEN FIRING UP JUST AHEAD OF THE COLD FRONT. AS THE COLD FRONT PASSES THROUGH AND LIKELY CLEARS THE EASTERN END OF THE COMMONWEALTH BY NOON. HIGH PRESSURE WILL SETTLE IN ACROSS THE OHIO VALLEY TONIGHT. WITH CLEARING SKIES AND MUCH COOLER LOWS THAN WE HAVE BEEN SEEING OVER THE PAST SEVERAL DAYS.
/ISSUED 1135 AM CDT FRI APR 10 2015/ ALL LINGERING RAIN BEHIND COLD FRONT HAS PUSHED SOUTH THUS HAVE UPDATED POPS ACCORDINGLY. COLD FRONT IS CURRENTLY LOCATED ROUGHLY ALONG A LINE FROM JACKSON TENNESSEE.
A COLD FRONT IS APPROACHING FROM THE NORTHWEST. THE COLD FRONT IS CURRENTLY (2 PM EDT) OVER NORTHERN AL AND MODELS SUGGEST THAT IT WILL WEAKEN AND STALL OVER OUR AREA.
WEAK LOW PRESSURE TROUGHS IN THE FLOW. SATURDAY NIGHT THROUGH FRIDAY AN APPROACHING WAVE OF LOW PRESSURE WILL CONTINUE TO MOVE THROUGH THE INTERMOUNTAIN WEST SATURDAY EVENING.
230 PM MST FRI APR 10 2015 A SLOW WARMING TREND WILL COMMENCE TODAY THROUGH SATURDAY AS HIGH PRESSURE RIDGING GRADUALLY REBUILDS OVER THE DESERT SOUTHWEST.
319 PM CDT Fri Apr 10 2015 A secondary cold front currently pushing into the Illinois River Valley will quickly swing through the area late this afternoon, causing winds to veer to the W/NW and increase markedly. High pressure will build into the region overnight and will be centered directly over central Illinois by 12z. Due to the clear skies and diminishing winds, overnight lows will dip into the middle to upper 30s across much of the area, but will remain a bit warmer around 40 degrees south of I-70.
I WENT WITH SLIGHTLY LOWER POPS ON WED AND THURS DUE TO SLIGHTLY WEAKER FORCING AT THE LOWER LEVELS AND RELATIVELY LOW MOISTURE VALUES.
A much cooler air mass was spreading over extreme southeast Kansas and the Missouri Ozarks this morning. Temperatures fell into the low to mid 40s, under clearing skies and light northwest breezes.
453 PM EDT FRI APR 10 2015 UPPER LOW THAT HAS BEEN IMPACTING THE AREA SINCE THU EVENING HAS MOVED E OF LAKE SUPERIOR THIS AFTERNOON. LOWS TONIGHT COULD GET QUITE COLD OVER THE INTERIOR W AS SKIES CLEAR AND THE RIDGE MOVES IN. SUNNY SKIES AND A WARMER AIRMASS ON SAT WILL ALLOW TEMPS TO RISE INTO THE MID-UPPER 40S E AND 50S ELSEWHERE. A RIDGE ACROSS THE REGION INTO MID WEEK AND ANOTHER TROUGH TOWARD THE AREA BY THU INTO FRI.
A fast moving cold front arrives late tonight into Saturday morning. This will bring showery, breezy and cooler conditions into Saturday, along with the potential for snow over the mountain passes, especially in the Cascades.
220 PM MST FRI APR 10 2015 A SLOW WARMING TREND WILL COMMENCE TODAY THROUGH SATURDAY AS HIGH PRESSURE RIDGING GRADUALLY REBUILDS OVER THE DESERT SOUTHWEST.
COLD FRONT MOVING SOUTHEAST THROUGH THE AREA EARLY IN THE PERIOD.
/ISSUED 417 AM EDT FRI APR 10 2015/ SHOWERS AND THUNDERSTORMS ALONG AND AHEAD OF THE COLD FRONT APPROACHING NORTHWEST GA WILL SPREAD ACROSS THE FORECAST AREA TODAY.
653 PM EDT FRI APR 10 2015 A WEAK TROF WILL BE MOVING ACROSS THE AREA EARLY TONIGHT AND THEN HIGH PRESSURE WILL BUILD IN LATE TONIGHT.
203 PM EDT FRI APR 10 2015 A COLD FRONT WILL MOVE EAST OF THE REGION BY LATER TODAY AND THIS EVENING.
WEAK LOW PRESSURE TROUGHS IN THE FLOW. SATURDAY NIGHT THROUGH FRIDAY AN APPROACHING WAVE OF LOW PRESSURE WILL CONTINUE TO MOVE THROUGH THE INTERMOUNTAIN WEST FRIDAY EVENING.
244 PM EDT FRI APR 10 2015 A STRONG COLD FRONT WILL APPROACH FROM THE WEST THIS EVENING AND SWEEP ACROSS THE AREA LATE TONIGHT.
930 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL REMAIN OVERHEAD THIS AFTERNOON.
1242 PM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CROSS THE REGION TUESDAY. A WARM FRONT WILL LIFT ACROSS THE REGION WEDNESDAY NIGHT.
A MUCH WARMER DAY WEDNESDAY WITH THE RISK FOR SHOWERS. THE FLOW WILL SWING AROUND TO THE SOUTH-SOUTHWEST ALLOWING WARMER AIR TO SURGE NORTHWARD LATER IN THE DAY. WARM AIR ADVECTION WILL CONTINUE TONIGHT WITH RIDGE BUILDING IN FROM THE WEST. A SURFACE WARM FRONT WILL APPROACH FROM THE SOUTHWEST LATE TONIGHT. SHOWERS WILL BE MORE SPOTTY OR SCATTERED IN NATURE AS THE WARM FRONT WILL BE RUNNING UNDERNEATH THE AFOREMENTIONED RIDGE. A DRIER ATMOSPHERE WILL FILL IN BEHIND THE WARM FRONT. STILL SEEING SOME TIMING AND LOCATION DIFFERENCES BETWEEN MODELS ON WHERE THE NEXT SURFACE WAVE DEVELOPS ALONG THE COLD FRONT AND WHERE IT WILL EVENTUALLY GO.
UPPER LEVEL PATTERN HAS A WEAK RIDGE OVER TX AND THE PLAINS. A COUPLE OF SHORT WAVE TROUGHS WERE MOVING THROUGH THE PAC NW AND INTER-MTN WEST. SHORT WAVE TROUGHS OVER THE INTER- MTN WEST SHOULD MOVE EAST QUICKLY AND PHASE TOGETHER DURING THIS TIME. BY THUR A RIDGE SHOULD DEVELOP OVER THE PAC COAST WITH A BROAD TROUGH OVER THE GREAT LAKES STRETCHING INTO TX. NW/N FLOW ALOFT SHOULD SUPPORT A COLD FRONT PUSHING THROUGH THE AREA ON THUR. AMPLIFIED PATTERN CONTINUES INTO THE WEEKEND WITH A NOW WEAKER SURGE OF COOLER AIR LATE FRI. GFS HAS A VERY POTENT TROUGH MOVING ACROSS THE STATE WHICH COULD PRODUCE SIGNIFICANT RAINFALL ACROSS THE AREA. SPEEDS WILL INCREASE SLIGHTLY ON WEDNESDAY AS THE LOW BEGINS TO DEEPEN AND MOVE NORTHEAST.
LOW CLOUDS WILL CONTINUE TO BE WIDESPREAD THROUGH THE MORNING WITH A SLOW IMPROVEMENT IN CLOUD COVER BY THE AFTERNOON ALONG THE SW AND W ZONES BUT ALONG THE COAST AND PARTS OF INLAND SE GA MAY SEE THE LOW CLOUDS LINGER THROUGH MUCH OF THE AFTERNOON. LINGERING COASTAL TROUGH AND A FEW SHOWERS STILL ANTICIPATED AT LEAST IN THE EVENING. WITH LOW CLOUDS A GOOD POSSIBILITIES UNTIL THE TROUGH BREAKS DOWN.
NORTH/NORTHWEST WINDS WILL GET GUSTY THIS MORNING BEHIND A COLD FRONT. /ISSUED 415 AM CDT TUE MAR 24 2015/ WEAK COLD FRONT WILL PASS THROUGH THE TEXAS AND OKLAHOMA PANHANDLES TODAY. ANOTHER COLD FRONT ON WEDNESDAY EXPECTED TO DROP MAXIMA TO NEAR 60 IN THE NORTHEAST. AS JET STREAK PASSES THROUGH QUICKLY-MOVING TROF AXIS ABOVE REGION OF MODEST UPSLOPE FLOW.
MORNING RAOB SHOWED A SUBSTANTIAL DRY-LAYER ABOVE 850MB BUT AMPLE MOISTURE REMAINS TRAPPED IN THE LOWEST 5KFT WHICH IS ALLOWING THE LOW CLOUDS TO PERSIST. TEMPS SHOULD WARM QUICKLY INTO THE LOW/UPPER 80S ACROSS THE AREA. COASTAL SPOTS SHOULD STAY A BIT COOLER AS LOCAL HI-RES MODELS SHOW A DECENT SEABREEZE DEVELOPING BY EARLY AFTERNOON WHICH WILL HELP TO KEEP THE COAST IN THE MID/UPPER 70S.
1052 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL REMAIN IN CONTROL OF OUR WEATHER INTO WEDNESDAY BRINGING DRY BUT CHILLY CONDITIONS. A WARM FRONT WILL PUSH THROUGH THE AREA BRINGING MIXED PRECIPITATION FOLLOWED BY RAIN. AN APPROACHING UPPER-LEVEL TROUGH/PSBL CLOSED LOW FROM THE NW FRI NGT INTO SAT. HIGH PRESSURE OVER THE EAST COAST WILL CONTROL OUR WEATHER OVER THE NEXT 24 HOURS, CLEARING SKIES THIS AFTERNOON AND BRINGING VFR CONDITIONS WITH LIGHT WINDS.
942 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CROSS THE REGION TUESDAY. A WARM FRONT WILL LIFT ACROSS THE REGION WEDNESDAY NIGHT.
929 AM EDT TUE MAR 24 2015 HIGH PRESSURE HAS WEDGED DOWN FROM THE NORTHEAST THIS MORNING. /ISSUED 411 AM EDT TUE MAR 24 2015/ WEDGE OF HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE AREA TODAY AND WEDNESDAY. AFTERNOON HIGHS TODAY AND WEDNESDAY WILL REACH THE LOW TO MID 70S.
THE LOW CLOUDS WILL BE SLOW TO BURN OFF AND MAY LAST INTO THE AFTERNOON IN SOME PLACES. THOUGH THESE NUMBERS COULD BE IN DANGER OF NOT REALIZING DEPENDING ON HOW QUICKLY/IF AT ALL THE LOW CLOUDS BREAK UP. SOME LIGHT DRIZZLE BEING REALIZED WITH ALL OF THE LOW CLOUDS HANGING AROUND. COASTAL TROUGHING HAS SET UP OFF OF THE EAST COAST OF FLORIDA.
A RIDGE WILL BUILD INTO THE AREA WEDNESDAY BRINGING WARMING AND DRYING FOR THE REMAINDER OF THE WEEK. A WARM FRONT BROUGHT HEAVY RAIN TO DEL NORTE COUNTY EARLY THIS MORNING WITH LIGHT TO MODERATE RAIN FARTHER SOUTH. THE RIVERS ARE RISING RAPIDLY AND IT IS POSSIBLE THAT THE SMITH RIVER AT DR FINE BRIDGE COULD COME CLOSE TO MONITOR STAGE.
EXPECT 850 MB TEMPERATURES BY THIS AFTERNOON TO BE A BIT WARMER THAN YESTERDAY. SFC WINDS WILL VEER TO SSW AND INCREASE BRIEFLY THIS EVENING AS THE LOW-LVL JET STRENGTHENS.
1028 AM EDT TUE MAR 24 2015 WEAK COLD FRONT/LOW PRESSURE AND THETA-E GRADIENT CURRENTLY HUNG UP BETWEEN MIA AND FLL. MAX T SHOULD BE A LITTLE COOLER THAN YESTERDAY, WITH MORE LOW CLOUDS TO START THE DAY.
STRONG HIGH PRESSURE ALOFT WILL RETURN FOR THE LATTER HALF OF THE WEEK. ENOUGH MOISTURE AND INSTABILITY IS STILL LINGERING OVER CENTRAL AND SOUTHERN UTAH THAT THE NAM AND HRRR ARE PRODUCING SPOTTY CONVECTION OVER THE HIGHER TERRAIN. AS WELL AS THE STRENGTH OF WINDS BEHIND THE COLD FRONT TONIGHT. BUT THERE IS A CHANCE THAT WINDS REMAIN SOUTHERLY UNTIL THE TRUE COLD FRONTAL PASSAGE AROUND 00Z.
DRY WEATHER CONDITIONS THEN RETURN REGION-WIDE BY TONIGHT WITH A SUBSTANTIAL WARMING TREND EXPECTED THROUGH WEEK'S END AS HIGH PRESSURE BUILDS OVER THE STATE. ONSHORE FLOW WILL WEAKEN OVER THE REGION ON WEDNESDAY AS A MID/UPPER LEVEL RIDGE BUILDS OFF OF THE WEST COAST.
818 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE REGION FROM THE NORTH TODAY WITH DRY WEATHER EXPECTED. BELOW NORMAL TEMPERATURES WILL OCCUR THROUGH MID WEEK THEN A WARMING TREND AHEAD OF A COLD FRONT WILL OCCUR LATE IN THE WEEK. THE POSSIBILITY OF NEAR FREEZING TEMPERATURES MAY OCCUR OVER THE WEEKEND. UPPER FLOW BECOMES WEST TO SOUTHWESTERLY TONIGHT THROUGH WEDNESDAY NIGHT AHEAD OF A DEVELOPING AND DEEPENING UPPER TROUGH IN THE MIDDLE OF THE COUNTRY. HIGH PRESSURE WILL SHIFT EASTWARD AND OFF THE ATLANTIC COAST TONIGHT INTO WEDNESDAY. READINGS IN THE LOWER 70S NORTH. PREFER WARMER OVERNIGHT LOWS DUE TO EXPECTED CLOUDS/COOL MOS BIAS.
CENTRAL TAF SITES WILL RECOVER TO VFR BY 16-17Z WITH THE LOW CLOUDS MIXING OUT AND SHIFTING EAST. AFTERNOON HIGHS INTO THE LOW 80S ACROSS MUCH OF THE REGION. A MID AND UPPER LEVEL TROUGH WILL DEEPEN OVER THE CENTRAL AND NORTHERN PLAINS WEDNESDAY AFTERNOON AND NIGHT.
Following a brief drying trend, light rain returns Wednesday then warmer and drier weather returns to close out the work week.
THE LOW LEVEL INVERSION FROM LAST NIGHT HAS STAYED IN PLACE KEEPING PLENTY OF MOISTURE TRAPPED AT LOW LEVELS. TEMPERATURES WILL BE SLIGHTLY WARMER THAN LAST NIGHT WITH 60S ALONG THE COAST AND UPPER 50S FURTHER INLAND.
636 AM CDT TUE MAR 24 2015 AN INITIAL FRONTOGENETIC BAND OF LIGHT RAIN SET UP ALONG A LINE FROM ABOUT MOBRIDGE TO GETTYSBURG TO MILLER EARLY THIS MORNING. THE COLD FRONT WILL QUICKLY TRACK ACROSS THE REGION LATE TUESDAY INTO WEDNESDAY. NORTHWEST FLOW ALOFT AND ARCTIC HIGH PRESSURE AT THE SFC WILL SHIFT EAST AS AN UPPER RIDGE BRIEFLY BUILDS OVER THE REGION ON FRI NIGHT/SAT.
954 AM MDT TUE MAR 24 2015 SUBSIDENCE BEHIND THE EXITING TROUGH AS BROUGHT AN END TO MOST OF THE SHOWERS IN THE MOUNTAINS THIS MORNING. FOR THIS AFTN OUTSIDE OF A CHC OF LIGHT SHOWERS OVER THE HIGHER TERRAIN IT WILL BE DRY. MODELS HAVE A WEAK UPPER TROUGH TO PUSH EASTWARD ACROSS THE CWA ON WEDNESDAY.
1043 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL BUILD IN TODAY. A WARM FRONT WILL BRING THE CHANCE FOR SHOWERS LATE TONIGHT AND WEDNESDAY. SUBSIDENCE IS EXPECTED TO INCREASE THROUGH THE AFTERNOON AS HIGH PRESSURE BUILDS IN BEHIND A WEAK EXITING UPPER TROUGH. THIS SHOULD GRADUALLY DECREASE THE LOWER LEVEL STRATOCU. WARM AIR ADVECTION WILL CONTINUE TONIGHT WITH RIDGE BUILDING IN FROM THE WEST. A SURFACE WARM FRONT WILL APPROACH FROM THE SOUTHWEST LATE TONIGHT. SHOWERS WILL BE MORE SPOTTY OR SCATTERED IN NATURE AS THE WARM FRONT WILL BE RUNNING UNDERNEATH THE AFOREMENTIONED RIDGE. A DRIER ATMOSPHERE WILL FILL IN BEHIND THE WARM FRONT. STILL SEEING SOME TIMING AND LOCATION DIFFERENCES BETWEEN MODELS ON WHERE THE NEXT SURFACE WAVE DEVELOPS ALONG THE COLD FRONT AND WHERE IT WILL EVENTUALLY GO.
1039 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY AND WILL SHIFT OFFSHORE ON WEDNESDAY AS A WARM FRONT APPROACHES FROM THE SOUTHWEST. THE WARM FRONT WILL LIFT NORTHEAST THROUGH THE REGION WEDNESDAY NIGHT.
THE LOW STRATUS REMAINS SOCKED IN OVER THE REST OF THE FORECAST AREA. HAVE ADJUSTED SKY COVER GRIDS UPWARD TO REFLECT THE HIGHER AMOUNT OF CLOUD COVER FOR AREAS AROUND BATON ROUGE AND NEW ORLEANS FOR THE REMAINDER OF THE DAY.
1237 PM EDT TUE MAR 24 2015 HIGH PRESSURE OVER THE NORTHEAST U. AN AREA OF LOW PRESSURE WILL TRACK INTO THE REGION TONIGHT AND BRING A PERIOD OF RAIN. HIGH PRESSURE OVER SE CANADA/NE CONUS WILL PROVIDE FAIR WEATHER ACROSS OUR AREA EARLY IN THE PERIOD. SOME CONCERN THAT TEMPS WILL REMAIN BLO FREEZING ACROSS THE NE PORTION OF THE CWA FOR A SHORT PERIOD AS RAIN MOVES IN TONIGHT. BUT HELD OFF ADDING FREEZING RAIN TO THE FCST SINCE TEMPS MARGINAL AND IF FREEZING RAIN ESPECIALLY CONSIDERING SOME SUNSHINE WILL WARM ROADS TODAY AND SUB-SFC TEMPS REMAIN ABOVE FREEZING. AS LONGWAVE TROUGH MOVES THROUGH THE REGION LOW PRESSURE WILL DEVELOP AND MOVE NE THROUGH THE OHIO VALLEY.
SATELLITE PIX SHOWED A WEAK SHORT WAVE TROUGH BEHIND THE MAIN ONE JUST REACHING THE OREGON COAST AT 8 AM MDT. THIS WILL BRING 1 TO 3 INCHES OF SNOW ACROSS THE HIGHWAY 55 AND 95 CORRIDORS. LATER THIS MORNING SOUTH WINDS WILL INCREASE THEN STRONGER WINDS ARE ON TAP WHEN A COLD FRONT CROSSES INTO SW IDAHO. NW FLOW ALOFT WILL PUSH A DOME OF HIGH PRESSURE WITH LIGHT WINDS ACROSS SE OREGON AND SW IDAHO LATE TONIGHT THROUGH WEDNESDAY. ENOUGH MOISTURE LOOKS TO SLIDE THROUGH THE DIRTY RIDGE FOR A SMALL THREAT OF SHOWERS NORTH OF A BURNS TO BOISE LINE.
LOW PRESSURE WILL DEVELOP IN NORTH TEXAS DURING THE DAY LEADING TO AN INCREASE IN WIND THIS EVENING AND TONIGHT.
TEMPERATURES ARE IN THE LOWER TO MID 70S. A TROUGH OF LOW PRESSURE WILL REMAIN IN THE VICINITY OF THE FLORIDA KEYS THIS AFTERNOON.
1112 AM EDT TUE MAR 24 2015 A WARM FRONT WILL MOVE NORTH TOWARD THE OHIO RIVER TODAY. SHOWERS WILL BE LIKELY AND THUNDERSTORMS WILL BE POSSIBLE TONIGHT INTO WEDNESDAY WHEN THE WARM FRONT IS FORECAST TO MOVE NORTH ACROSS THE AREA.
1121 AM CDT TUE MAR 24 2015 A WEAK COLD FRONT WILL MOVE INTO THE AREA THIS AFTERNOON AND WILL BE THE FOCUS FOR SHOWER AND THUNDERSTORM DEVELOPMENT BY LATE AFTERNOON AND EARLY EVENING ACROSS FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
A STRONGER STORM SYSTEM WILL BE APPROACHING FROM THE WEST AS A TROUGH LOW LOW PRESSURE AMPLIFIES SOUTH. SENDING A STRONGER COLD FRONT TOWARD THE FOUR STATE REGION. THIS WILL PRODUCE MORE WIDESPREAD SHOWERS AND THUNDERSTORMS ALONG AND AHEAD OF THE SURFACE COLD FRONT.
942 AM EDT TUE MAR 24 2015 AN UPPER-LEVEL RIDGE AXIS WILL MOVE OVER THE TENNESSEE VALLEY AND SOUTHERN APPALACHIAN REGION TODAY. THE AMPLE SUNSHINE AND WINDS VEERING TO THE SOUTHWEST WILL CREATE AN EVEN WARMER DAY IN MOST LOCATIONS. WITH HIGHS IN THE LOW TO MID 70S BEING COMMON ACROSS MOST OF THE VALLEY. CHATTANOOGA AIRPORT, TN 75 55 72 57 / 0 10 10 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 74 54 74 56 / 10 10 10 20 OAK RIDGE, TN 74 54 75 57 / 10 10 10 20 TRI CITIES AIRPORT, TN 68 48 72 50 / 10 20 10 30.
AS WELL AS A TROUGH OVER THE NORTHERN PLAINS. WEAK UPPER LEVEL RIDGING WAS OCCURRING AND EXTENDING SOUTHWARD OVER THE FORECAST AREA. WEAK HIGH PRESSURE WAS DOMINATING THE PATTERN WITH CALM WINDS AND MOSTLY CLEAR SKIES. WITH THE LOWEST VISIBILITIES EXPECTED ALONG THE AREA WATER BODIES AND IN THE VALLEY LOCATIONS. A FEW SPOTS MAY SEE HIGHS IN THE LOWER 80S BY TOMORROW. THE HIGH PRESSURE SITUATED OVER THE EAST COAST IS EXPECTED TO MOVE EASTWARD DURING THE DAY TODAY. AN AMPLIFIED UPPER RIDGE WILL MOVE ASHORE THE WEST COST. STRENGTHENING A TROUGH OVER THE CENTRAL CONUS. AS THIS TROUGH MOVES EAST OVERNIGHT WEDNESDAY.
SURFACE WARM FRONT WILL CONTINUE TO DEVELOP NORTH OF THE AREA.
549 AM MDT TUE MAR 24 2015 12Z TAF CYCLE WEST TO NORTHWEST WINDS IN THE HIGHER TERRAIN AND IMMEDIATE EAST SLOPES WILL REMAIN BREEZY THROUGH TODAY. AN UPPER LEVEL TROUGH WILL DIVE ACROSS THE AREA FROM THE NORTHWEST WEDNESDAY AND WEDNESDAY NIGHT AND SEND A COLD FRONT INTO THE STATE.
1102 AM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE REGION FROM THE NORTH THIS AFTERNOON WITH DRY WEATHER EXPECTED. BELOW NORMAL TEMPERATURES WILL OCCUR THROUGH MID WEEK THEN A WARMING TREND AHEAD OF A COLD FRONT WILL OCCUR LATE IN THE WEEK. THE POSSIBILITY OF NEAR FREEZING TEMPERATURES MAY OCCUR OVER THE WEEKEND. MODELS INDICATE LOW CLOUDS OVERSPREADING THE REGION WITH LOWS OVERNIGHT IN THE LOW TO MID 50S. PREFER WARMER OVERNIGHT LOWS DUE TO EXPECTED CLOUDS/COOL MOS BIAS. UPPER FLOW BECOMES SOUTHWESTERLY WEDNESDAY AHEAD OF A DEVELOPING AND DEEPENING UPPER TROUGH IN THE MIDDLE OF THE COUNTRY. HIGH TEMPERATURES WILL RANGE FROM THE LOWER 70S NORTH.
THIS CLOUDINESS CONTINUES TO LINGER TO THE NORTH OF A LOW LEVEL TROF EXTENDING THROUGH THE NORTHERN GULF. TEMPERATURES RANGE FROM THE UPPER 40S IN CENTRAL LA TO THE LOWER 60S IN SOUTH CENTRAL LA WHILE ACROSS SOUTHEAST TEXAS TEMPERATURES WERE IN THE MID 50S. THIS LOW WILL MOVE NORTHEAST INTO THE MIDWEST WEDNESDAY NIGHT AND THE TRAILING COLD FRONT WILL BEGIN TO MOVE SOUTH.
A WEAK TROUGH WILL BRING A SLIGHT CHANCE OF A FEW LIGHT SHOWERS MAINLY FOR THE WHITE MOUNTAINS REGION WEDNESDAY.