Aikyam-Lab/Synoptic-Bench huggingface dataset:
520 PM CST THU FEB 26 2015 HIGH PRESSURE SHIFTS ACROSS THE MISSOURI VALLEY OVERNIGHT. HIGH PRESSURE SHIFTS EAST OF THE REGION FRIDAY WITH A WEAK RETURN SOUTHEASTERLY FLOW DEVELOPING.
419 PM CST THU FEB 26 2015 PARTLY CLOUDY SKIES AND NORTHERLY WINDS GUSTING 15-25 MPH HAVE BEEN COMMON ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON IN THE WAKE OF A COLD FRONT THAT MOVED THROUGH LAST NIGHT. KEEPING HIGH TEMPS FRIDAY BELOW FREEZING FOR MOST LOCATIONS. DRIER AIR OVER THE REGION BEHIND LAST NIGHTS COLD FRONT ALONG WITH SURFACE WINDS BECOMING MORE EASTERLY COULD SLOW THE PROGRESSION OF PRECIP MAKING IT TO THE GROUND FRIDAY AND LIMIT THE OVERALL AMOUNT OF ACCUMULATION.
A LARGE AREA OF HIGH PRESSURE WILL BUILD ACROSS THE AREA FOR THE FIRST PART OF THE WEEKEND. RADAR SHOWS SCATTERED LIGHT SNOW WHICH SO FAR HAS ALL BUT EVAPORATED AS ACTIVITY MOVED OUT OF THE WESTERN HIGHLANDS INTO THE CENTRAL RIDGE-VALLEY AREA. THE UPPER TROUGH AXIS FLATTENS OUT AN MOVES ACROSS THE REGION FRIDAY. TO THE LOWER AND MID 20S ACROSS THE LOWER SUSQ VALLEY. CLEAR SKIES AND LIKELY THE COLDEST NIGHT UNTIL NEXT WINTER WILL OCCUR FRIDAY NIGHT AS THE CENTER OF HIGH PRESSURE MOVES OVER PENN.
228 PM PST THU FEB 26 2015 A RIDGE OF HIGH PRESSURE OVER THE EASTERN PACIFIC WILL KEEP SKIES MOSTLY CLEAR THROUGH TONIGHT.
DRY COLD FRONT HAS ENTERED NW AL AND WILL CONTINUE TO PUSH SE THRU THE NIGHT. SEEING SOME LIGHT FREEZING FOG DEVELOPING WITHIN THE CLOUD FREE AREAS WHERE TEMPS HAVE DROPPED A BIT QUICKER. HAVE ADDED PATCHY FREEZING FOG FOR AREAS WITHIN ABOUT 40-50 MILES ON EITHER SIDE OF I-20 THRU MIDNIGHT. THE PASSAGE OF THE COLD FRONT AND EXPECTED INCREASE IN CLOUD COVER AND WINDS SHOULD HELP DISSIPATE THE FOG. LOW TEMPS WILL BE IN THE LOW/MID 20S NORTHERN HALF AND UPPER 20S/LOW 30S SOUTHERN HALF. MEANWHILE AREAS IN THE EAST ARE ACTUALLY COOLER THAN THOSE IN THE WEST AS THE THICKER STRATUS CLOUDS HAVE NOT ALLOWED TEMPERATURES TO GO FAR. TONIGHT WE WILL SEE ANOTHER LOBE OF ENERGY SLIDE AROUND THE BASE OF THE TROUGH IN THE EAST.
958 PM CST THU FEB 26 2015 COLD FRONT OFFSHORE AND WINDS HAVE PICKED UP ACROSS THE COASTAL AREAS. TRENDS SHOWING THAT TEMPS AND DEWPOINTS NEEDED LOWERING AND HAVE EXPANDED THE NEXT TWO TIERS OF COUNTIES SOUTHWARD TO INCLUDE CONROE IN FREEZING TEMPERATURES TONIGHT.
558 PM CST THU FEB 26 2015 ARCTIC HIGH PRESSURE OVER FAR SOUTHEAST SASKATCHEWAN WILL DROP SOUTHEAST ACROSS WESTERN AND CENTRAL NORTH DAKOTA TONIGHT BRINGING ANOTHER FRIGID NIGHT WITH DANGEROUS WIND CHILLS. CURRENT SURFACE ANALYSIS PLACES HIGH PRESSURE SLIDING THROUGH EASTERN MONTANA INTO WESTERN NORTH DAKOTA. UPPER LEVEL ANALYSIS PLACES TROUGH THROUGH THE GREAT LAKES INTO THE MIDWEST WITH RIDGE OVER THE PACIFIC BRINGING NORTHERLY FLOW TO OUR AREA. LIGHT SOUTHERLY WINDS BEHIND DEPARTING HIGH WILL BRING SLIGHTLY WARMER TEMPERATURES.
A COLD FRONT IS GRADUALLY PROGRESSING THROUGH CENTRAL TEXAS AND SHOULD PASS THROUGH THE RIO GRANDE VALLEY AND DEEP SOUTH TEXAS AROUND SUNRISE FRIDAY MORNING. CURRENTLY FRONT IS LOCATED OVER NORTH CENTRAL TEXAS HEADING SOUTH WITH HIGH PRESSURE GRADUALLY BUILDING ACROSS THE COASTAL WATERS. MOST LOCATIONS WEST OF HWY 77 AND 281 WILL EXPERIENCE TEMPERATURES IN THE LOW 40S WHILE EAST OF HWY 77 TEMPERATURES WILL BE NEAR 50.
1056 PM EST THU FEB 26 2015 LOW PRESSURE OFF THE MID-ATLANTIC COAST WILL CONTINUE MOVING OUT TO SEA OVERNIGHT. CANADIAN HIGH PRESSURE WILL BUILD INTO THE AREA FOR THE WEEKEND. LOW PRESSURE OFF THE MID-ATLANTIC COAST WILL CONTINUE MOVING NORTHEAST AND OUT TO SEA. CANADIAN HIGH PRESSURE CENTERED OVER THE NORTHERN PLAINS WILL SLIP SOUTHEAST INTO THE CENTRAL MS RIVER VALLEY OVERNIGHT.
WITH TEMPERATURES CURRENTLY BELOW FREEZING. ADDED SOME PATCHY FREEZING FOG FOR EASTERN HALF OF THE FORECAST AREA THROUGH 06Z. A COLD FRONT ENTERING NW ALABAMA AS OF 03Z SHOULD PUSH THROUGH THE REMAINDER OF THE AREA BY 06Z. TEMPERATURES WILL FALL INTO THE LOW TO MID 20S TONIGHT WITH PARTLY TO MOSTLY CLOUDY SKIES. PATCHY BLACK ICE IS POSSIBLE TONIGHT FROM A REFREEZING OF THE SNOW MELT THAT OCCURRED DURING THE DAY. STUMPF /ISSUED 537 PM CST THU FEB 26 2015/ COLD FRONT MOVING INTO WESTERN TENNESSEE SHOULD ARRIVE AT BOTH TERMINALS BETWEEN 02-03Z THIS EVENING. HIGH PRESSURE AND DRIER AIR MOVING IN WILL HELP TO CLEAR OUT ANY REMAINING MVFR CIGS FRIDAY MORNING BUT.
WILL FOLLOW THIS MORE AGRESSIVE TREND OVER THE MORE CONSERVATIVE MOS GUIDANCES AS NAM WIND FORECASTS SUGGEST UPSTREAM TROUGHING TO THE NW WILL BRING A SLIGHT ENHANCEMENT ISENTROPIC LIFT BY 06Z. UPPER AIR ANALYSIS THIS MORNING SHOWED A BROAD TROUGH ACROSS THE COUNTRY. AT THE SURFACE A COLD FRONT WAS MOVING THROUGH THE CWA FROM THE NORTH BRINGING ANOTHER COLD. DURING THIS PERIOD THE UPPER TROUGH WILL BECOME SHARPER OVER THE WEST COAST AND THE UPPER FLOW OVER TEXAS WILL BECOME MORE SOUTHWESTERLY. THE COLD FRONT WILL BE SOUTH OF OUR AREA BY THE START OF THIS PERIOD WITH COLD AIR SETTLING IN. MODELS HAVE TRENDED WARMER THIS MORNING. SOME MID-LEVEL WARMING WILL MEAN FREEZING RAIN OR SLEET OVER THE NORTH. BRIDGES.
MODERATE NORTHEAST WINDS INCREASE TONIGHT BEHIND A PASSING COLD FRONT. WAA JUST ABOVE THE SURFACE INCREASES FURTHER FRIDAY NIGHT AS SOME WEAK COASTAL TROUGHING OCCURS. TROUGH MAY SHIFT INLAND JUST ENOUGH ACROSS SE AREAS FRI NIGHT TO ALLOW TEMPS THERE TO WARM A FEW DEGREES OVERNIGHT.
419 PM CST THU FEB 26 2015 MINIMAL SENSIBLE WEATHER HIGHLIGHTS IN THE SHORT TERM PERIOD OTHER THAN THE LOW TEMPERATURES TONIGHT. HIGH PRESSURE WILL BUILD ACROSS THE REGION.
HIGH PRESSURE IN EASTERN MONTANA THIS AFTN WILL TRACK SOUTHEAST THROUGH SOUTH DAKOTA AND INTO IOWA TONIGHT. SKIES CLEAR TONIGHT BUT ENOUGH OF A GRADIENT ON THE NORTH SIDE OF THE HIGH TO CONTINUE 5-7 KT WIND IN ERN ND/RRV WHILE EASTERN FCST AREA GOES LIGHT/VARIABLE. TONIGHT WILL SEE LOW TEMPS A BIT WARMER THAN LAST NIGHT IN MOST AREAS AS THE COLDEST 925 MB WINDS SHIFT SOUTH OF THE AREA. A BIT WARMER AGAIN ON FRIDAY WITH SUNSHINE AS WARMER 850MB/925MB AIR DROPS SOUTH.
555 PM EST THU FEB 26 2015 A WEAK COLD FRONT IS MOVING ACROSS SOUTH FLORIDA THIS EVENING.
COLD FRONT STILL SET TO MOVE THROUGH OVERNIGHT AND IS JUST BACK TO OUR WEST. CHATTANOOGA AIRPORT, TN 24 36 23 44 / 10 10 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 23 32 20 41 / 10 10 10 10 OAK RIDGE, TN 22 33 19 42 / 10 10 10 10 TRI CITIES AIRPORT, TN 21 28 16 39 / 20 20 10 10.
824 PM EST THU FEB 26 2015 LOW PRESSURE WILL TRACK WELL TO OUR SOUTH LATER TODAY AND TONIGHT.
BUT IS BREAKING UP AS A SHORT WAVE RIDGE SLIDES INTO THE REGION FROM THE NORTHWEST.
THESE ARE SLOWLY ERODING FROM THE NORTHWEST AS STRONG HIGH PRESSURE MOVES INTO ARKANSAS.
717 PM EST THU FEB 26 2015 LOW PRESSURE OFF THE MID-ATLANTIC COAST WILL CONTINUE MOVING OUT TO SEA OVERNIGHT. CANADIAN HIGH PRESSURE WILL BUILD INTO THE AREA FOR THE WEEKEND. LOW PRESSURE OFF THE MID-ATLANTIC COAST WILL CONTINUE MOVING NORTHEAST AND OUT TO SEA. CANADIAN HIGH PRESSURE CENTERED OVER THE NORTHERN PLAINS WILL SLIP SOUTHEAST INTO THE CENTRAL MS RIVER VALLEY OVERNIGHT.
815 PM EST THU FEB 26 2015 HIGH PRESSURE WILL BUILD FROM THE NORTHWEST TONIGHT. WEAK TROUGHING WILL KEEP CLOUDS IN PLACE THROUGH MUCH OF THE NIGHT.
531 PM CST THU FEB 26 2015 LARGE AREA OF ARCTIC HIGH PRESSURE TO BUILD INTO THE STATE TONIGHT BECOMING CENTERED OVER SW TO CENTRAL IA BY 12Z FRIDAY. HIGH PRESSURE MOVES OFF TO THE EAST ON FRIDAY NIGHT WITH RETURN FLOW COMING IN OVERNIGHT.
1037 PM EST THU FEB 26 2015 CURRENTLY - A PREFRONTAL TROUGH MIGRATING ACROSS THE FLORIDA KEYS AREA. IS WELL AHEAD OF A COLD FRONTAL ZONE. TEMPERATURES ARE CURRENTLY IN THE MID 70S WITH DEW POINT TEMPERATURES IN THE LOWER 70S. SHORT TERM UPDATE (OVERNIGHT) - THE PREFRONTAL TROUGH WILL MOVE SOUTHEASTWARD THROUGH THE FLORIDA KEYS. DESPITE THE MAIN BODY OF THE COLD FRONT BEING WELL NORTH OF OUR AREA. ALONG WITH THE COOLER WATERS TO OUR NORTH SHOULD ALLOW TEMPERATURES TO SETTLE DOWN TO NEAR 70 OR THE UPPER 60S. A WEAK COLD FRONT WILL PUSH INTO KEYS WATERS OVERNIGHT. CEILINGS WILL SWING BETWEEN MVFR AND IFR AS THE COLD FRONT LINGERS ACROSS OUR AREA ON FRIDAY.
THE WEATHER GETS MORE INTERESTING AS AN UPPER LOW DROPS SOUTH ALONG THE WEST COAST.
537 PM CST THU FEB 26 2015 FOR 00Z TAFS /ISSUED 204 PM CST THU FEB 26 2015/ THE 20Z SURFACE ANALYSIS AND IR/VISIBLE SATELLITE IMAGERY INDICATED THAT TEMPS WERE IN THE MID 30S ACROSS SOUTHERN MIDDLE TENNESSEE TO AROUND 40 DEGREES IN PORTIONS OF NORTHERN ALABAMA UNDER SOME BREAKS IN THE LOW CLOUDS. THE SHORT TERM MODELS ARE IN DECENT AGREEMENT INVOLVING MOVING ANOTHER REINFORCING COLD FRONT THROUGH THE FORECAST AREA BY AROUND 06Z TONIGHT.
/ISSUED 419 PM CST THU FEB 26 2015/ PARTLY CLOUDY SKIES AND NORTHERLY WINDS GUSTING 15-25 MPH HAVE BEEN COMMON ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON IN THE WAKE OF A COLD FRONT THAT MOVED THROUGH LAST NIGHT. KEEPING HIGH TEMPS FRIDAY BELOW FREEZING FOR MOST LOCATIONS. DRIER AIR OVER THE REGION BEHIND LAST NIGHTS COLD FRONT ALONG WITH SURFACE WINDS BECOMING MORE EASTERLY COULD SLOW THE PROGRESSION OF PRECIP MAKING IT TO THE GROUND FRIDAY AND LIMIT THE OVERALL AMOUNT OF ACCUMULATION.
557 PM EST THU FEB 26 2015 A WEAK COLD FRONT IS MOVING ACROSS SOUTH FLORIDA THIS EVENING.
AND THE FACT THAT 03Z TEMPS ARE STILL RUNNING 2-3 DEGREES WARMER THAN MOS ATTM. WITH TEMPS EXPECTED TO STRUGGLE TO CLIMB ABOVE FREEZING N OF I-30 FRIDAY. /ISSUED 525 PM CST THU FEB 26 2015/ COLD FRONT HAS MOVED SOUTH ACROSS AREA.
DUE TO ADDITIONAL CLOUDS MOVING IN FROM THE WEST ASSOCIATED WITH AN APPROACHING COLD FRONT.
Lows tonight will range from near 20 across northern counties, to the lower and middle 20s elsewhere. Given the high confidence for accumulating snowfall, a Winter Weather Advisory will be issued for the Big Country for Friday.
627 AM EST FRI MAR 6 2015 A COLD PRESSURE RIDGE WILL BE CENTERED NORTHWEST OF THE FORECAST AREA TODAY. THE RIDGE WILL EXTEND THROUGH THE AREA TONIGHT AND SATURDAY. THE PRESSURE RIDGE TO OUR NORTHWEST TODAY WILL EXTEND THROUGH THE FORECAST AREA TONIGHT. THE PRESSURE GRADIENT WILL CONTINUE TO RELAX AS THE RIDGE GETS CLOSER TO THE AREA. THE DRY PRESSURE RIDGE WILL REMAIN NEAR THE FORECAST AREA SATURDAY AND SATURDAY NIGHT. AIR MASS MODIFICATION WILL RESULT IN WARMER TEMPERATURES.
556 AM CST FRI MAR 6 2015 THE LATEST SFC ANALYSIS WAS INDICATING PASSING RIDGE AXIS SINKING EAST-SOUTHEASTWARD TOWARD THE MOUTH OF THE OH RVR VALLEY. SFC TROF OR EVEN A TYPE OF WARM FRONT WAS EVIDENT ACRS THE CENTRAL AND UP INTO THE NORTHERN PLAINS. GUSTY SOUTH TO SOUTHWEST WINDS AND WARM AIR ADVECTION REGIME TO DRAW UPON PLAINS THERMAL POOL AND MAKE FOR LATE AFTERNOON HIGHS GENERALLY IN THE LOW TO MID 30S NORTH OF I80.
STRONG HIGH PRESSURE OF 1035+ MB WILL BE SITUATED OVER THE MIDSOUTH TODAY THEN GRADUALLY SINK SOUTHWARD TONIGHT AS IT SLOWLY WEAKENS. HIGHS TEMPERATURES TODAY WILL REMAIN NEAR OR SLIGHTLY BELOW FREEZING WHERE THE DEEPEST SNOW COVER EXISTS FROM NORTHEASTERN AR AND THE MO BOOTHEEL INTO NORTHWEST TN. TO THE SOUTH TEMPERATURES WILL MANAGE TO CLIMB ABOVE FREEZING WITH NEAR 40 DEGREES OR A LITTLE ABOVE EXPECTED ACROSS PORTIONS OF NORTHEAST MS WHERE THE WINTRY PRECIPITATION WAS LESS. TEMPERATURES WILL DROP TO WELL BELOW FREEZING AGAIN ACROSS THE AREA. THUS REFREEZING AND BLACK ICE WILL REMAIN A PROBLEM IN MANY LOCATIONS. HIGHS ON SATURDAY WILL CLIMB INTO THE LOWER 40S TO MIDDLE 50S. THUS WILL FEEL MUCH WARMER AND MUCH MORE MELTING WILL OCCUR.
911 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL BRING COLD BUT DRY CONDITIONS TODAY. HIGH PRESSURE CURRENTLY IN CONTROL ACROSS THE AREA THIS MORNING. THE RIDGE AXIS IS CURRENTLY JUST EAST OF THE AREA ALLOWING WINDS TO TURN TO THE SOUTHWEST. THE CENTER OF THE HIGH DROPS INTO THE DEEP SOUTH TONIGHT. LOWERED PCPN DOWN TO A CHANCE OF FLURRIES SATURDAY NIGHT AHEAD OF A WEAK CDFNT/TROF.
645 AM EST FRI MAR 6 2015 A RIDGE OF HIGH PRESSURE WILL DEPART TO THE EAST TODAY ALLOWING FOR STRENGTHENING SOUTHERLY WINDS.
TEMPERATURES WILL TREND A LITTLE WARMER EACH DAY THROUGH THE WEEKEND.
548 AM EST FRI MAR 6 2015 A COLD PRESSURE RIDGE WILL BE CENTERED NORTHWEST OF THE FORECAST AREA TODAY. THE RIDGE WILL EXTEND THROUGH THE AREA TONIGHT AND SATURDAY. THE PRESSURE RIDGE TO OUR NORTHWEST TODAY WILL EXTEND THROUGH THE FORECAST AREA TONIGHT. THE PRESSURE GRADIENT WILL CONTINUE TO RELAX AS THE RIDGE GETS CLOSER TO THE AREA. THE DRY PRESSURE RIDGE WILL REMAIN NEAR THE FORECAST AREA SATURDAY AND SATURDAY NIGHT. AIR MASS MODIFICATION WILL RESULT IN WARMER TEMPERATURES.
EAST TEXAS HIGH PRESSURE WILL MAINTAIN A NORTHEAST FLOW WITH SOME COLD ADVECTION. /ISSUED 417 AM CST FRI MAR 6 2015/ A COLD NIGHT ACROSS THE FORECAST AREA AS HIGH PRESSURE RIDGES FROM THE GREAT LAKES DOWN THE MISSISSIPPI VALLEY AND THROUGH THE FORECAST AREA. AIR TEMPERATURES HAVE FROM TO FREEZING AND BELOW ALL THE WAY DOWN TO THE COAST. AND WILL HELP "WARM" TEMPERATURES TO AROUND 50F TO THE LOWER 50S. THIS WILL HELP PROVIDE ONE MORE NIGHT OF SUBFREEZING TEMPERATURES DOWN TO I-10.
HIGH PRESSURE THROUGH THE WEEKEND WILL BRING CLEAR SKIES AND ABOVE NORMAL TEMPERATURES.
605 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL BUILD IN TODAY. A WEAK COLD FRONT IS EXPECTED LATE SATURDAY. MUCH OF THE COLD AIR ALOFT WILL HAVE EJECTED TO THE NORTHEAST AS THE TROUGH RUSHES TO THE EAST COAST. AS A WEAK COLD FRONT MOVES THROUGH THE GREAT LAKES. I THINK THE MAIN FOCUS SATURDAY NIGHT WILL NEED TO BE ON THE THREAT FOR FREEZING DRIZZLE TO DEVELOP.
1030 AM EST FRI MAR 6 2015 A COLD PRESSURE RIDGE WILL BE CENTERED NORTHWEST OF THE FORECAST AREA TODAY. THE RIDGE WILL EXTEND THROUGH THE AREA TONIGHT AND SATURDAY. THE PRESSURE RIDGE TO OUR NORTHWEST TODAY WILL EXTEND THROUGH THE FORECAST AREA TONIGHT. THE PRESSURE GRADIENT WILL CONTINUE TO RELAX AS THE RIDGE GETS CLOSER TO THE AREA THROUGH THE DAY. THE DRY PRESSURE RIDGE WILL REMAIN NEAR THE FORECAST AREA SATURDAY AND SATURDAY NIGHT. AIR MASS MODIFICATION WILL RESULT IN WARMER TEMPERATURES.
STRONG HIGH PRESSURE ACROSS OUR REGION WILL MOVE TO THE MID ATLANTIC STATES AND SOUTHEAST U. A WEATHER PATTERN CHANGE WILL FINALLY TAKE PLACE AS THE STRONG UPPER TROUGH ACROSS GREAT LAKES AND EASTERN U. MODELS INDICATE THE UPPER RIDGE OVER THE WESTERN U. ISSUED AT 345 A EST FRI MAR 6 2015 HIGH PRESSURE ACROSS OUR REGION WILL MOVE WILL MOVE TO THE SOUTHEAST U. AND MID ATLANTIC STATES LATER TODAY AND WARM ADVECTION ON THE BACK SIDE OF THIS HIGH WILL ALLOW TEMPERATURES TO MODERATE SOME LATER TODAY. HIGH PRESSURE TO OUR SOUTHEAST WILL KEEP EVERYTHING DRY THROUGH THE PERIOD. A VERY WEAK AND DRY COLD FRONT WILL MOVE ACROSS OUR REGION SATURDAY NIGHT.
649 AM EST FRI MAR 6 2015 HIGH PRESSURE WITH DRY AND COLD WEATHER WILL REMAIN INTO TONIGHT.
708 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL BUILD SOUTH OF NEW ENGLAND TODAY. A COLD FRONT WILL APPROACH FROM THE NORTHWEST ON SATURDAY AND WILL CROSS THE AREA SATURDAY NIGHT.
417 AM CST FRI MAR 6 2015 A COLD NIGHT ACROSS THE FORECAST AREA AS HIGH PRESSURE RIDGES FROM THE GREAT LAKES DOWN THE MISSISSIPPI VALLEY AND THROUGH THE FORECAST AREA. AIR TEMPERATURES HAVE FROM TO FREEZING AND BELOW ALL THE WAY DOWN TO THE COAST. AND WILL HELP "WARM" TEMPERATURES TO AROUND 50F TO THE LOWER 50S. THIS WILL HELP PROVIDE ONE MORE NIGHT OF SUBFREEZING TEMPERATURES DOWN TO I-10.
THIS RIDGE AXIS WILL SLIDE EAST OF THE METROPLEX THIS MORNING. WACO WILL STAY CLOSER TO THE RIDGE AXIS.
CHATTANOOGA AIRPORT, TN 42 26 57 32 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 24 52 31 / 0 0 0 0 OAK RIDGE, TN 36 22 52 31 / 0 0 0 0 TRI CITIES AIRPORT, TN 36 18 50 28 / 0 0 0 0.
542 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL SLIDE SOUTH OF THE AREA TODAY AND TONIGHT. A COLD FRONT WILL APPROACH LATER SATURDAY THEN CROSS THE REGION SATURDAY NIGHT.
HIGH PRESSURE AT THE SURFACE WILL MAKE FOR MAINLY LIGHT AND VRBL WINDS TODAY. THE UPPER LEVEL LOW PRESSURE CURRENTLY LOCATED OFF THE BAJA CALIFORNIA COAST. WINDS ARE EXPECTED TO BECOME SOUTH TO SOUTHWEST IN THE LOWER LEVELS. ALLOWING FOR WARMER OVERNIGHT TEMPERATURES AND MAYBE A FEW SHOWERS OVER EAST TEXAS.
1036 AM EST FRI MAR 6 2015 HIGH PRESSURE DOMINATES. BUT STILL WELL BELOW FREEZING. HIGH PRESSURE BUILDS STRONG FROM THE WEST TO BE IN CONTROL OF THE WEATHER CONDITIONS THROUGH TONIGHT. TEMPERATURES SHOULD STAY BELOW FREEZING THIS AFTERNOON. HIGH PRESSURE BUILDS IN WITH DRY ATMOSPHERIC COLUMN IN PLACE.
EVEN THEN THE UPPER RIDGE AXIS AND WARMEST AIR WILL STILL BE TO OUR WEST.
THE LOW CLOUDS THAT WERE MENTIONED IN THE EARLIER DISCUSSION HAVE MOVED WEST INTO DEKALB COUNTY. STILL EXPECTING IT TO TAKE TILL 11AM-12PM TO GET THE WHOLE AREA ABOVE FREEZING. FOR TODAY AND SATURDAY A LARGE AREA OF HIGH PRESSURE WILL KEEP SKIES MOSTLY SUNNY/CLR ALONG WITH A WARMING TREND. TEMPS WILL GO ABOVE FREEZING BY 11 AM/NOON TODAY AND WITH PLENTY OF SUNSHINE. BUT BY SATURDAY THE WARMING TREND REALLY STARTS TO KICK IN WITH AFTN HIGHS IN THE LOW/MID 50S.
640 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL BRING COLD BUT DRY CONDITIONS TODAY. AXIS OF THE HIGH PRESSURE RIDGE IS ACROSS THE REGION THIS MORNING. AS THE RIDGE AXIS DROPS SOUTHEAST DURING THE DAY WINDS WILL PICK UP FROM THE SOUTH. THE CENTER OF THE HIGH DROPS INTO THE DEEP SOUTH TONIGHT. LOWERED PCPN DOWN TO A CHANCE OF FLURRIES SATURDAY NIGHT AHEAD OF A WEAK CDFNT/TROF.
COLD FRONT FROM FORT MYERS TO JUPITER WAS BEGINNING TO SLOW DOWN AND WILL STALL OVER THE FLORIDA STRAITS THIS EVENING. CLOUDY AND COOL NORTH OF THIS AREA WHILE AREAS TO SEE A FEW BREAKS IN THE CLOUDS AS THE LOW CLOUDS BURN OFF. WEAK COLD FRONT MOVING THROUGH SOUTH FLORIDA WITH IFR CIGS IN TAMPA BAY AND AREAS TO THE EAST AND NORTH. WINDS TO PICKUP BEHIND COLD FRONT SO SMALL CRAFT EXERCISE CAUTION 20 TO 60 MILES OFFSHORE FROM ENGLEWOOD TO THE SUWANNEE RIVER.
1028 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL SLIDE SOUTH OF THE AREA TODAY AND TONIGHT. A COLD FRONT WILL APPROACH LATER SATURDAY THEN CROSS THE REGION SATURDAY NIGHT.
414 AM CST FRI MAR 6 2015 LARGE PORTION OF SE TX WILL HAVE FREEZING TEMPS AS THE SUN COMES UP THIS MORNING.
457 AM CST Fri Mar 6 2015 Update to add low clouds and freezing fog to portions of the forecast area, and send the latest Aviation Discussion. Since temperatures are well below freezing, freezing fog will likely allow a thin layer of ice to form on vehicles and other raised surfaces. Low clouds and fog continue to develop just east of the higher terrain over southeast New Mexico and west Texas early this morning, and drift north and east. By 06/15Z, or shortly thereafter, expect the low clouds and fog to lift with VFR conditions prevailing areawide thereafter.
THIS AFTERNOON THE LOW/MID LEVEL 850 MB TROUGH AXIS WILL BEGIN TO PUSH DOWNSTREAM OF THE AREA WITH SOME ENHANCED SHALLOW LIFT PERHAPS INVIGORATING SHOWER ACTIVITY A BIT MORE ACROSS NE FL AND ADVERTISED SHOWER CHANCES AROUND 30-40%. AS THIS TROUGH AXIS SHIFTS EASTWARD INTO THE EVENING.
THROUGH THE AFTERNOON A WEAK COLD FRONT JUST NORTH OF LAKE OKEECHOBEE IS EXPECTED TO SLOWLY SAG TO THE SOUTH. THIS COMBINED WITH AFTERNOON SEA BREEZE CONVERGENCE SHOULD INCREASE THE COVERAGE OF SHOWERS ACROSS THE AREA WITH THE HIGHEST COVERAGE ACROSS THE INTERIOR. A WEAK COLD FRONT WILL MOVE INTO THE SOUTH FLORIDA AREA TODAY, THEN STALL.
HIGH PRESSURE OVER THE WESTERN STATES WILL CONTINUE TO PUSH THE STORM TRACK WELL TO THE NORTH OF ARIZONA.
532 AM CST FRI MAR 6 2015 A THERMAL RIDGE WILL CONTINUE TO MOVE OFF THE NRN/CNTL ROCKIES AND INTO WRN AND NCNTL NEB TODAY. THE RAP SUGGESTED HIGHS IN THE UPPER 50S TO LOWER 60S AND THE FORECAST IS SLIGHTLY COOLER THAN THIS MODEL.
546 AM MST FRI MAR 6 2015 WIDESPREAD FREEZING FOG. TEMPERATURES WILL TREND A LITTLE WARMER EACH DAY THROUGH THE WEEKEND.
THIS GRADIENT WAS COMBINING WITH COLD TEMPERATURES IN YELLOWSTONE PARK AND WARMER AIR OVER KLVM TO CREATE GAP FLOW. AN UPPER RIDGE OVER THE GREAT BASIN DOMINATES THE PATTERN.
GETTING SOME SPOTTY REPORTS OF FREEZING DRIZZLE. /ISSUED 317 AM EST FRI MAR 6 2015/ YESTERDAYS COLD FRONT IS CURRENTLY ACROSS CENTRAL FLORIDA. HIGH PRESSURE CENTERED ACROSS THE MID MISSISSIPPI RIVER VALLEY WILL BUILD SOUTHWARD THROUGH SATURDAY. BUT SHOULD SWITCH BACK TO THE NW AFTER THE 500MB TROUGH MOVES THROUGH DURING THE LATE AFTERNOON/EARLY EVENING. NEARLY ZONAL FLOW ALOFT AND WEAK HIGH PRESSURE DOMINATING AT THE SURFACE AT THE BEGINNING OF THE EXTENDED.
THESE DOWNSLOPING WINDS WILL LEAD TO A SIGNIFICANT WARM UP TODAY WITH HIGHS REACHING INTO THE LOWER 60S THIS AFTERNOON. MEDIUM RANGE MODELS INDICATE A WESTERLY FLOW ALOFT PREVAILING ACROSS THE WESTERN HIGH PLAINS THROUGH THE WEEKEND AS A RIDGE OF HIGH PRESSURE REMAINS SETTLED ACROSS THE CALIFORNIA COAST. A WARMING TREND WILL CONTINUE INTO SATURDAY EVEN AS A WEAK TROUGH MIGRATES ACROSS WESTERN KANSAS. UNDER MOSTLY SUNNY SKIES, HIGHS CAN BE EXPECTED GENERALLY UP INTO THE UPPER 50S(F) TO THE LOWER 60S(F).
ARCTIC HIGH PRESSURE WILL BUILD INTO THE AREA TODAY AND SETTLE OVER THE REGION TONIGHT NIGHT AND SATURDAY.
ARCTIC HIGH PRESSURE WILL BUILD INTO THE AREA THROUGH FRIDAY AND SETTLE OVER THE REGION FRIDAY NIGHT AND SATURDAY.
A WEAK COLD FRONT WILL MOVE INTO THE SOUTH FLORIDA AREA TODAY, THEN STALL.
THE NORTHEAST CORNER WILL BE WARMER DUE TO LITTLE OR NO SNOW COVER AND DOWNSLOPE WINDS OFF THE CHEYENNE RIDGE. IT COULD APPROACH 60 IN JULESBURG WHILE SOME OF THE LOWER SNOW COVERED AREAS WILL BE STUCK IN THE UPPER 40S. WITH A RIDGE OF HIGH PRESSURE OVER THE WEST COAST AND A WEAK TROUGH OVER THE DESERT SOUTHWEST.
INHERITED DAYTIME HIGH TEMPERATURES WERE MORE REFLECTIVE OF WARMER MAV GUIDANCE INSTEAD OF COOLER MET.
ARCTIC HIGH PRESSURE PROVIDING FOR A FRIGID START THIS MORNING UNDER CLEAR SKIES AND LIGHT WIND CONDITIONS. JUST LOOKING AT CONTINUED CHILLY CONDITIONS WITH VALLEY HIGHS MAINLY IN THE LOWER 20S. WITH THE HIGHEST ACCUMULATIONS LIKELY ACROSS ST. LAWRENCE/FRANKLIN NY COUNTIES AND THE HIGHER ELEVATIONS OF VERMONT (ISOLD 3" AMT POSSIBLE ACROSS THE NRN SUMMITS).
859 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL BUILD IN TODAY. A WEAK COLD FRONT IS EXPECTED LATE SATURDAY. SO HIGHS GENERALLY IN THE LOWER TO MIDDLE 20S WERE PROJECTED BY AFTERNOON. MUCH OF THE COLD AIR ALOFT WILL HAVE EJECTED TO THE NORTHEAST AS THE TROUGH RUSHES TO THE EAST COAST. AS A WEAK COLD FRONT MOVES THROUGH THE GREAT LAKES. I THINK THE MAIN FOCUS SATURDAY NIGHT WILL NEED TO BE ON THE THREAT FOR FREEZING DRIZZLE TO DEVELOP.
WITH HIGH PRESSURE CRESTING OVERHEAD, ABUNDANT SUNSHINE AND SLOWLY WARMING TEMPS INTO THE TEENS AND 20'S IS EXPECTED FOR THE REST OF TODAY, WHICH THE PREVIOUS FORECAST HAS COVERED WELL. ARCTIC HIGH PRESSURE PROVIDING FOR A FRIGID START THIS MORNING UNDER CLEAR SKIES AND LIGHT WIND CONDITIONS. JUST LOOKING AT CONTINUED CHILLY CONDITIONS WITH VALLEY HIGHS MAINLY IN THE LOWER 20S. WITH THE HIGHEST ACCUMULATIONS LIKELY ACROSS ST. LAWRENCE/FRANKLIN NY COUNTIES AND THE HIGHER ELEVATIONS OF VERMONT (ISOLD 3" AMT POSSIBLE ACROSS THE NRN SUMMITS).
A COLD FRONT HAS DECELERATED ACROSS THE FLORIDA PENINSULA. A COLD FRONT DRAPED ACROSS THE FLORIDA PENINSULA WILL GRADUALLY SLIDE SOUTHEASTWARD TONIGHT.
FOR TODAY AND SATURDAY A LARGE AREA OF HIGH PRESSURE WILL KEEP SKIES MOSTLY SUNNY/CLR ALONG WITH A WARMING TREND. TEMPS WILL GO ABOVE FREEZING BY 11 AM/NOON TODAY AND WITH PLENTY OF SUNSHINE. BUT BY SATURDAY THE WARMING TREND REALLY STARTS TO KICK IN WITH AFTN HIGHS IN THE LOW/MID 50S.
526 AM CST FRI MAR 6 2015 HIGH PRESSURE WILL SLOWLY MOVE EAST TODAY.
636 AM EST FRI MAR 6 2015 SOUTHWEST RETURN FLOW WILL STRENGTHEN THROUGH THE DAY AS THE GRADIENT STRENGTHENS BETWEEN APPROACHING UPSTREAM LOW PRESSURE AND A HIGH OVER THE EASTERN US. TODAY AND TONIGHT HIGH PRESSURE DRAPED ACROSS THE SOUTHEAST UNITED STATES COUPLED WITH LOW AMPLITUDE NORTHWEST FLOW ALOFT WILL FACILITATE PERSISTENCE OF DRY CONDITIONS THROUGH THE FORECAST PERIOD AND A CONTINUATION OF SOUTHWEST GRADIENT FLOW. ONGOING LIGHT WARM ADVECTION WILL WARM 925MB TEMPERATURES BY 10 OR MORE DEGREES OVER THE NEXT 24 HOURS, ENSURING HIGH TEMPERATURES IN THE MID 20S, OR ABOUT 5 TO 10 DEGREES WARMER THAN YESTERDAY. BRIEF SHOT OF ISENTROPIC ASCENT ON THE FRONT END AND A LATE DAY COLD FRONTAL PASSAGE WARRANTS A LOW END POP MENTION THROUGHOUT THE DAY.
540 AM EST FRI MAR 6 2015 HIGH PRESSURE WILL SLIDE SOUTH OF THE AREA TODAY AND TONIGHT. A COLD FRONT WILL APPROACH LATER SATURDAY THEN CROSS THE REGION SATURDAY NIGHT.
728 AM EDT TUE APR 14 2015 HIGH PRESSURE WILL SLOWLY SHIFT ACROSS THE GREAT LAKES THROUGH MID-WEEK.