Aikyam-Lab/Synoptic-Bench huggingface dataset:
1151 PM EST MON FEB 9 2015 LOW PRESSURE SOUTH OF THE NEW ENGLAND COAST WILL DRIFT OFF TO THE EAST TONIGHT AND TUESDAY AS HIGH PRESSURE BUILDS IN FROM THE NORTHWEST.
257 AM CST TUE FEB 10 2015 WATER VAPOR IMAGERY AND RAP H5 ANALYSIS INDICATED A DEPARTING TROF TO THE EAST OF THE CWFA, WITH AN UPPER RIDGE SHIFTING EASTWARD ACROSS THE CENTRAL PLAINS. OTHERWISE, AT THE SFC, HIGH PRESSURE OVER THE OHIO VALLEY WILL SHIFT TO THE EAST THROUGH THE DAY, ALLOWING WINDS TO SHIFT FROM NORTHERLY TO NORTHEASTERLY BY THIS AFTN. AS A RESULT OF THE RIDGING ALOFT AND INCREASED SUNSHINE TODAY, TEMPERATURES WILL WARM INTO THE UPPER 40S TO AROUND 50.
1150 PM EST MON FEB 9 2015 HIGH PRESSURE FROM THE UPPER MIDWEST WILL MOVE TO NORTHWEST OHIO OVERNIGHT AND SLIDE EASTWARD ACROSS THE AREA TUESDAY INTO TUESDAY NIGHT.
A 925-850MB THERMAL RIDGE WILL NOSE INTO OUR WESTERN WE HAVE RAISED HIGHS INTO THE LOWER 80S WEST OF I-35.
OTHERWISE, HIGH PRESSURE BUILDING OVERHEAD WILL BRING SEVERAL DAYS OF DRY WEATHER. HUMIDITY VALUES ARE GENERALLY ABOVE 80 PERCENT AND A FEW MORE HOURS OF COOLING REMAIN, SO FREEZING FOG REMAINS POSSIBLE IN VALLEY LOCATIONS GENERALLY FROM HIGHWAY 50 NORTHWARD. SOME FACTORS THAT COULD LIMIT FOG DEVELOPMENT INCLUDE A PERIOD OF DRYING YESTERDAY AFTERNOON SINCE MOST OF THE RAIN ENDED BEFORE NOON, AND SOME NORTHEAST WIND SHOWING UP AT RIDGE LEVEL ALONG THE SIERRA CREST AT THE ALPINE MEADOWS LOCATION.
DEEPENING LOW PRESSURE ACROSS THE FAR NORTHERN HIGH PLAINS INTO WYOMING AND MONTANA WILL CAUSE THE LEADING EDGE OF A PACIFIC HIGH TO CREATE NORTH SURFACE WINDS INTO WESTERN KANSAS. THE SOURCE AIR HOWEVER IS STILL IN THE LOW TEENS CELSIUS ACROSS THE SOURCE REGION, AND AS SUCH, SIGNIFICANT COLD ADVECTION IS NOT ANTICIPATED INITIALLY.
AN UPPER LEVEL TROUGH WILL MOVE THROUGH THE AREA TONIGHT. SHOWERS WILL GRADUALLY COME TO AN END TUESDAY AS AN UPPER LEVEL RIDGE BUILDS AND MOVES EAST. THE UPPER RIDGE WILL COMBINE WITH LOW LEVEL OFFSHORE FLOW TO GIVE DRY AND MILD WEATHER TO THE REGION.
GIVEN THE FACT THAT WINDS HAVE VEERED AROUND TO A NE DIRECTION IN THE LOWEST 3KFT PER LZK'S 00Z RAOB. SHOULD SEE A QUICK PROGRESSION FROM NNE WINDS CURRENTLY TO E AND THEN SE WINDS DURING THE DAY TUESDAY AS THE RIDGE AXIS CONTINUES TO MOVE EAST OF OUR REGION.
357 AM CST TUE FEB 10 2015 ANOTHER PLEASANT DAY IS IN STORE FOR SOUTHEAST TEXAS AS THE REGION REMAINS ON THE EASTERN PERIPHERY OF A 500 MB RIDGE. ONSHORE FLOW WILL HELP ADVECT SOME COOLER AIR TOWARDS COASTAL SITES.
TYPICALLY COOLER LOCATIONS IN THE FAR NORTHWEST WILL FALL INTO THE UPPER 20S. 08/MK /ISSUED 330 PM CST MON FEB 9 2015/ COLD FRONT HAS EXITED THE CWA BUT SOME SCATTERED SHOWERS. WILL REMAIN POSSIBLE ACROSS THE FAR EAST THRU 00Z WHEN THE UPPER TROF FINALLY PUSHES EAST INTO GA. WITH SEVERAL DRY COLD FRONTS EXPECTED TO PUSH THRU THE REGION FOLLOWED BY SOME FAIRLY STRONG ARCTIC HIGHS.
1231 AM EST TUE FEB 10 2015 HIGH PRESSURE OVER THE WESTERN GREAT LAKES WILL SETTLE INTO OUR REGION OVERNIGHT. HIGH PRESSURE WILL KEEP THE SHORT TERM PERIOD QUIET WITH BELOW NORMAL TEMPERATURES. THE STRONG INVERSION WILL STRENGTHEN AND LOWER AS SUBSIDENCE INCREASES WITH THE APPROACHING HIGH PRESSURE SYSTEM. DRY AIR ADVECTION FROM THE NORTH WILL SCOUR OUR THE LOW LEVEL MOISTURE BY LATE THIS EVENING WHICH WILL ALLOW SKIES TO CLEAR FROM NORTH TO SOUTH OVERNIGHT.
910 PM PST Mon Feb 9 2015 Drier and warmer conditions return Tuesday and will last through the remainder of the week. A ridge of high pressure will be building over the over the next day and will bring the return of dry and warmer weather.
1250 AM EST TUE FEB 10 2015 SCATTERED FLURRIES OR EVEN SOME PATCHY FREEZING DRIZZLE IN SOME AREAS WILL LINGER OVERNIGHT.
AFTER THE LOW CLOUDS CLEAR TUESDAY MOSTLY CLEAR SKIES WILL PREVAIL AS A SANTA ANA WIND EVENT DEVELOPS.
133 AM EST TUE FEB 10 2015 LOW PRESSURE WILL MOVE FARTHER OFF THE SOUTHEAST COAST TODAY.
/ISSUED 519 PM CST MON FEB 9 2015/ REINFORCING SHOT OF COOLER DRIER AIR HAS ARRIVED TODAY IN THE FORM OF A SECONDARY COLD FRONT. A STRONG PRESSURE GRADIENT IS CURRENTLY IN PLACE ACROSS THE LOWER MISS VALLEY RESULTING IN NNE WIND GUSTS PUSHING 20KTS ACROSS SOME TERMINAL SITES THIS AFTERNOON. SFC RIDGING QUICKLY SHIFTS EAST OF OUR REGION BY 00Z WED ALLOWING FOR SE WINDS RETURNING TO OUR NE TX TERMINALS DURING THE DAY TUESDAY WITH MOSTLY E TO NE WINDS ACROSS REMAINING TERMINALS. A WEAK COLD FRONT HAS MOVED ACROSS THE AREA TODAY BUT MOST OF THE COOLER AIR IS LAGGING WELL TO THE NORTH. TEMPS ARE EXPECTED TO BE SEVERAL DEGREES COOLER ON TUESDAY AS NELY LOW LVL FLOW FINALLY BRINGS SOME OF THIS COOLER AIR INTO THE REGION BUT AFTERNOON HIGHS WILL STILL BE WELL ABOVE NORMAL.
315 AM CST Tue Feb 10 2015 Overnight lows holding generally in the low 30s across much of the area. Temperature advections also progged to be neutral in the lower levels, and southeast winds also continue. A mix to 925mb would bring high temperatures into the 50s with warmer temperatures out west under the warmer thermal ridge aloft.
EXPANSIVE AREA OF MOIST AIR IN THE LOW LEVELS EXTENDS BACK ACROSS MUCH OF THE MIDWESTERN U.
234 AM MST TUE FEB 10 2015 UPPER FLOW WILL BE WESTERLY TODAY AS A TROUGH MOVES INTO THE NORTHERN PLAINS.
THE LOW WILL MOVE EAST AND INTO THE JAMES RIVER VALLEY BY MID AFTERNOON. ROUGHLY A 14MB PRESSURE GRADIENT FROM NORTHWEST TO SOUTHEAST SETS UP BEHIND THE DEPARTING THE LOW PRESSURE THIS AFTERNOON. WITH THE ONGOING PRECIPITATION AND EXPECTATION THAT THE FREEZING RAIN/SLEET WILL CHANGE TO SNOW IN THE JAMES RIVER VALLEY.
1202 AM EST TUE FEB 10 2015 AVIATION MAINLY CLEAR AND COLD CONDITIONS ARE EXPECTED TONIGHT AS HIGH PRESSURE DRIFTS OVERHEAD.
Areas of the eastern Ozarks will be noticeably cooler given the later arrival of the warm advection. Tonight will then be relatively mild with a cold front moving into extreme southeastern Kansas and west-central Missouri around sunrise.
1220 AM EST TUE FEB 10 2015 A COLD FRONT WILL CONTINUE PUSHING EAST TONIGHT BRINGING SHOWERS TO THE AREA.
/ISSUED 946 PM CST MON FEB 9 2015/ HIGH PRESSURE SETTLING INTO THE LOWER MISSISSIPPI VALLEY WILL LEAD TO LIGHT NORTHEAST WINDS ACROSS THE REGION OVERNIGHT WHILE CLEAR SKIES ALLOW FOR GOOD RADIATIONAL COOLING. SINCE WE'LL START OUT A LITTLE COOLER IN THE MORNING (AND WITH WINDS GOING E/SE) DON'T ANTICIPATE QUITE AS WARM READING ON TUE BUT DID GO A TOUCH ABOVE GUIDANCE SUGGESTIONS.
253 AM EST TUE FEB 10 2015 LOW PRESSURE WILL EXIT INTO THE CANADIAN MARITIMES TODAY AS HIGH PRESSURE BUILDS IN FROM THE NORTHWEST.
443 AM EST TUE FEB 10 2015 THE LOW PRESSURE AREA THAT TRAVERSED THE EASTERN GULF OF MEXICO AND FLORIDA PENINSULA DURING THE LAST 24 HOURS IS NOW INTENSIFYING/ EXPANDING OVER THE ATLANTIC OCEAN NORTH OF THE BAHAMAS. AND PROGRESSIVE MIDLATITUDE CYCLONES EVOLVING FROM THE GREAT LAKES TO THE NORTH ATLANTIC. A LOW PRESSURE SYSTEM WILL INTENSIFY OVER THE ATLANTIC OCEAN NORTH OF THE BAHAMAS TODAY AND TONIGHT.
404 AM EST TUE FEB 10 2015 A TROUGH EXTENDED FROM EASTERN CANADA SOUTH ALONG THE EASTERN SEABOARD. A BROAD TROUGH WAS OVER MUCH OF THE WESTERN CONUS. SOME VERY LIGHT FREEZING DRIZZLE AND FLURRIES ARE ONGOING ACROSS MUCH OF THE CWA THIS MORNING. IT IS A MIX OF FREEZING DRIZZLE AND FLURRIES AND IF WHAT HAS OCCURRED AT JKL IS ANY INDICATION IT IS VERY LIGHT FREEZING DRIZZLE. ESPECIALLY BRIDGES AND OVERPASSES AS WELL AS ANY UNTREATED ROADS. LATER ON THIS WILL BE FOLLOWED BY A GRADUAL CLEARING DURING THE AFTERNOON AND EVENING OF THE LOWER LEVEL CLOUDS.
A COLD FRONT WILL MOVE ACROSS THE REGION ON SATURDAY BRINGING ANOTHER CHANCE FOR PRECIPITATION OVER THE REGION. OTHERWISE FAIR WEATHER AS WE GET INTO A DRIER SRLY FLOW OF AIR AHEAD OF AN APPRCHING COLD FRONT.
HIGH PRESSURE WILL REMAIN IN PLACE ACROSS THE REGION TODAY. THE RIDGE OF HIGH PRESSURE IS PROVIDING CLEAR SKIES ACROSS THE ENTIRE CWA THIS MORNING AND THIS WILL BE THE CASE FOR THE REMAINDER OF THE DAY AS LEADING EDGE OF ANY HIGH CLOUDS FROM APPROACHING WEATHER SYSTEM STILL OVER EXTREME WESTERN NEVADA.
AREA OF LOW PRESSURE WAS POSITIONED OVER NORTHEAST MONTANA WILL MOVE ACROSS THE NORTHERN PLAINS AND INTO MINNESOTA TODAY. A COLD FRONT WAS DRAPED ALONG THE INTERNATIONAL BORDER LINKING THE APPROACHING CLIPPER AND AN AREA OF LOW PRESSURE OVER HUDSON BAY. THE FRONT WILL SAG SOUTH INTO MINNESOTA THIS MORNING AS THE LOW MOVES ACROSS THE DAKOTAS. SNOW MAY BEGIN AS RAIN OR FREEZING RAIN BEFORE QUICKLY CHANGING OVER TO ALL SNOW. TO THE LOW 50S SOUTHEAST. AND COOL AS A RIDGE OF HIGH PRESSURE SLIDES ACROSS THE CANADIAN PRAIRIES AND WESTERN GREAT LAKES.
CHATTANOOGA AIRPORT, TN 59 43 70 49 / 50 10 10 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 57 41 66 44 / 50 10 0 10 OAK RIDGE, TN 57 40 65 44 / 50 10 0 10 TRI CITIES AIRPORT, TN 53 39 63 41 / 60 10 0 10.
(PREV DISC) A WEAK PRESSURE PATTERN WILL AFFECT THE AREA AS LOW PRESSURE DEVELOPS ALONG COASTAL TROUGH VICINITY OF THE CAROLINAS. THE GFS HINTS AT A WEAK FRONTAL TROUGH EXTENDING SOUTH FROM THE LOW AND SLIDING EAST OF THE AREA.
932 AM EDT FRI MAR 20 2015 THE RIDGE OF HIGH PRESSURE WILL OVER THE FLORIDA STRAITS WILL BUILD NORTH INTO SOUTH FLORIDA TODAY. AS LOW PRESSURE MOVES EAST NORTHEAST UP THE MID ATLANTIC STATES COASTLINE.
TEMPS ARE WARMER SLOWER THAN ANTICIPATED BUT SOME CLEARING AND THE SWITCH TO WESTERLY WINDS SHOULD HELP FACILITATE THE RISE IN MERCURY THIS AFTERNOON.
COOLER AIR WILL LINGER OVER THE RAIN SOAKED SOUTHWEST DELTA COUNTIES THROUGH EARLY THIS AFTERNOON. /ISSUED 354 AM CDT FRI MAR 20 2015/ A SPLIT UPPER LEVEL FLOW PATTERN WILL CONTINUE OVER THE LOWER 48 STATES THROUGH SATURDAY. UNDER DIFFLUENT FLOW AHEAD OF AN ADVANCING SOUTHERN BRANCH UPPER LOW.
920 AM EDT FRI MAR 20 2015 LOW PRESSURE CROSSING THE OHIO VALLEY WILL BRING PRECIPITATION THROUGH MIDDAY. A WEAK COLD FRONT MAY PROVIDE A FEW SHOWERS TO NORTHERN PENNSYLVANIA ON SATURDAY. ELSEWHERE PREVIOUS SNOW AMOUNTS ACROSS THE RIDGES COUNTIES APPEAR IN GOOD SHAPE AS SYSTEM WILL BEGIN TO EXIT EAST BY EARLY AFTERNOON. BEFORE A COLD FRONT INVADES FROM THE NORTH. WITH VERY LITTLE BREAK BETWEEN THE EXITING SYSTEM FRIDAY NIGHT AND THE COLD FRONT SATURDAY NIGHT. A TONGUE OF WARMER AIR WILL PUSH IN FROM THE WEST AND DRIVE DAYTIME HIGHS ABOVE AVERAGE. HAVE TEMPERATURES HOLDING CLOSE TO WARMER NAM AND MAV NUMBERS. SATURDAY NIGHT A WEAK MID-LEVEL WAVE EJECTED FROM THE NORTHERN ROCKIES WILL PUSH THROUGH THE EASTERN GREAT LAKES AND BE CONSUMED BY THE LARGER UPPER LEVEL LOW. THE ASSOCIATED COLD FRONT WILL MOISTURE STARVED.
/ISSUED 354 AM CDT FRI MAR 20 2015/ A SPLIT UPPER LEVEL FLOW PATTERN WILL CONTINUE OVER THE LOWER 48 STATES THROUGH SATURDAY. UNDER DIFFLUENT FLOW AHEAD OF AN ADVANCING SOUTHERN BRANCH UPPER LOW.
912 AM MST FRI MAR 20 2015 TODAY IS A TRANSITION DAY TO FAIR WEATHER AS THE UPPER LEVEL LOW MOVES OUT OF THE STATE.
DEEP LAYERED RIDGING CENTERED OVER THE WESTERN CARIBBEAN IS PROVIDING A GENERALLY STABLE PROFILE. HIGHS WILL BE IN THE LOWER 80S WITH DEW POINTS IN THE UPPER 60S. THE LOW TEMPERATURE AT KEY WEST INTERNATIONAL AIRPORT WAS 79 DEGREES.
1028 AM EDT FRI MAR 20 2015 LOW PRESSURE WILL CONTINUE TO MOVE AWAY FROM THE REGION THROUGH THE DAY.
Northern branch upper trough was passing through the Central Plains early this morning with high cloud downstream of the southern branch cutoff system in the southwest states moving out of Kansas, with low cloud also exiting. The modifying airmass should keep fog in check for tonight with lows several degrees warmer. Split flow pattern starts off the forecast Saturday with an upper level trough over Mexico with a trough moving into the Pacific northwest.
1234 PM EDT FRI MAR 20 2015 LOW PRESSURE WILL TRACK OFF THE MID ATLANTIC COAST THIS EVENING BRINGING AN END TO OUR LATE SEASON SNOWFALL. A WEAK RIDGE OF HIGH PRESSURE WILL DRIFT EAST ACROSS THE COMMONWEALTH SATURDAY BRINGING DRY AND MILDER CONDITIONS.
1253 PM EDT FRI MAR 20 2015 LOW PRESSURE IMPACTS THE MID ATLANTIC TODAY. HIGH PRESSURE WILL BRIEFLY BUILD IN SATURDAY. THE NEXT COLD FRONT PUSHES THROUGH SATURDAY NIGHT WITH HIGH PRESSURE RETURNING TO START THE NEW WEEK. 5" AT THE HIGHER ELEVS. HAVE INCLUDED PATCHY DRIZZLE/FREEZING DRIZZLE EVERYWHERE THROUGH THE NIGHT. HAVE HELD OFF FROM ISSUING AN ADVISORY TONIGHT FOR THE FREEZING DRIZZLE POTENTIAL DUE TO LOWER CONFIDENCE ON TEMPS FOR THE PERIOD. DRY WX SETTING UP WITH ONLY SLIGHT CHC OF SHOWERS OVER THE WESTERN SLOPES AS A COLD FRONT APPROACHES AND MOVES THROUGH LATE SAT.
A SPLIT FLOW PATTERN IS IN PLACE ALOFT CUT OFF UPPER LEVEL LOW LIES OVER THE SWRN CONUS AND NW MEXICO WITH MOSTLY ZONAL FLOW OVER THE SERN CONUS AND A WEAK TROUGH OVER THE GREAT LAKES REGION. THIS IS PART OF A LARGE SWATH OF CLOUD COVER CAUSED BY THE JET BETWEEN THE TWO UPPER LEVEL LOWS.
1007 AM EDT FRI MAR 20 2015 LOW PRESSURE IMPACTS THE MID ATLANTIC TODAY. HIGH PRESSURE WILL BRIEFLY BUILD IN SATURDAY. THE NEXT COLD FRONT PUSHES THROUGH SATURDAY NIGHT WITH HIGH PRESSURE RETURNING TO START THE NEW WEEK. 5-4" AT THE HIGHER ELEVS. PCPN IS EXPECTED TO TRANSITION BACK TO ALL RAIN BY LATE MORNING/MIDDAY AS SOUTHERLY FLOW ALONG THE LLJ NUDGES IN JUST ENOUGH WARMER AIR TO PUSH TEMPS INTO THE UPPER 30S TO MID 40S. HAVE INCLUDED PATCHY DRIZZLE/FREEZING DRIZZLE EVERYWHERE THROUGH THE NIGHT. HAVE HELD OFF FROM ISSUING AN ADVISORY TONIGHT FOR THE FREEZING DRIZZLE POTENTIAL DUE TO LOWER CONFIDENCE ON TEMPS FOR THE PERIOD. DRY WX SETTING UP WITH ONLY SLIGHT CHC OF SHOWERS OVER THE WESTERN SLOPES AS A COLD FRONT APPROACHES AND MOVES THROUGH LATE SAT.
A COLD FRONTAL PASSAGE WILL OCCUR EARLY SAT AM. HIGH A RIDGE OF HIGH PRESSURE WILL DOMINATE RIGHT THROUGH SATURDAY NIGHT. COLDEST 925 TEMPS ARRIVE SATURDAY NIGHT AS NORTHEAST WINDS USHER IN COLDER AROUND THE HIGH.
900 AM PDT FRI MAR 20 2015 HIGH PRESSURE BUILDING OVER SOUTHERN CALIFORNIA WILL BRING WARMER AND DRIER WEATHER TODAY AND SATURDAY. A TROUGH MOVING OVER THE PACIFIC NORTHWEST WILL BRING A DEEPER MARINE LAYER.
WE HAVE A SOUTHERN STREAM SHORT WAVE TROUGH MOVING ACROSS THE AREA.
UPPER LEVEL RIDGE AXIS WILL CENTER ITSELF ACROSS THE FORECAST AREA TODAY RESULTING IN SUNNY SKIES AND WARMER TEMPERATURES. THIS WILL ALLOW FOR GOOD RADIATIONAL COOLING ALTHOUGH LOCATIONS IN/NEAR THE FOOTHILLS WILL BE A LITTLE WARMER WITH LIGHT DOWNSLOPE COMPONENT. 850-700 MB TEMPS RISE A FEW DEGREES SO WILL HAVE HIGHS IN THE LOWER TO MID 70S OVER NERN CO. FOR MON NIGHT INTO TUE AN UPPER LEVEL TROUGH WILL MOVE ACROSS WY AND THEN CLOSE OFF INTO AN UPPER LEVEL LOW OVER SOUTH DAKOTA. TEMPS WILL BE COOLER OVER NERN CO WITH READINGS IN THE LOWER TO MID 60S. IN ADDITION COOLER AIR WILL MOVE ACROSS NERN CO IN ASSOCIATION WITH A COUPLE OF FNTS.
BUT WILL BE SLIGHTLY COOLER ALONG THE COAST AS THE SEA BREEZE SETS UP ALONG THE WEST COAST THIS AFTERNOON. SEA FOG AND LOW STRATUS HAS DEVELOPED OVER THE COOLER GULF WATERS ALONG THE NATURE COAST.
1025 AM EDT FRI MAR 20 2015 LOW PRESSURE WILL TRACK ACROSS THE MID ATLANTIC STATES AND BRING A LATE SEASON SNOWFALL TO THE AREA TODAY. A WEAK RIDGE OF HIGH PRESSURE WILL DRIFT EAST ACROSS THE COMMONWEALTH SATURDAY BRINGING DRY AND MILDER CONDITIONS.
940 AM EDT FRI MAR 20 2015 WEAK LOW PRESSURE OFF THE SOUTH CAROLINA COAST WILL TRACK TO THE NORTH TODAY. SUNSHINE AND WARMER TEMPERATURES WILL BRIEFLY RETURN SATURDAY.
701 AM EDT FRI MAR 20 2015 A BROAD AREA OF LOW PRESSURE WILL MOVE THROUGH KENTUCKY THIS MORNING.
WHILE IN THE LOWER 5OS IN NORTHEAST AL AND SOUTHERN MIDDLE TN. THE LIFT PROVIDED BY THE WEAK COLD FRONT MOVING THROUGH THE CWA TODAY WILL ALLOW FOR SHOWERS TO CONTINUE THROUGH THIS AFTERNOON. AS HIGH PRESSURE BUILDS ACROSS THE TN VALLEY THIS AFTN/TONIGHT.
829 AM PDT Fri Mar 20 2015 Cooler today and this weekend as a weak system clips the north state with a chance of precipitation well north of Sacramento Friday night and Saturday.
A COLD FRONT IS CURRENTLY MOVING THROUGH THE REGION AND IS LOCATED ALONG A LINE FROM COMANCHE TO HILLSBORO TO CANTON. THE COLD FRONT SHOULD CONTINUE INTO CENTRAL TEXAS BY THIS EVENING BEFORE STALLING OUT. A LARGE UPPER LEVEL TROUGH CURRENTLY OVER BAJA CALIFORNIA WILL BEGIN TO EJECT EASTWARD. THE UPPER LOW WILL PASS ACROSS NORTH TEXAS SATURDAY EVENING WITH THE STRONGEST FORCING FOR ASCENT DURING THIS TIME.
623 AM CDT FRI MAR 20 2015 LOW PRESSURE ACROSS EASTERN MONTANA INTO WESTERN NORTH DAKOTA WILL SHIFT EAST TODAY. WHILE THE LOW WILL REMAIN CENTERED TO THE NORTH. THE COLD FRONT WILL SHIFT THROUGH THE AREA THIS EVENING INTRODUCING COOLER AIR TO THE REGION. COLD FRONT WILL SHIFT FROM NORTH TO SOUTH TONIGHT ACROSS THE REGION. COOLING THINGS SLIGHTLY IN THE NORTH AND KEEPING TEMPERATURES IN THE LOWER 30S ACROSS THE SOUTH.
1223 PM EDT FRI MAR 20 2015 A WEAK LOW PRESSURE SYSTEM WILL MOVE EAST OUT OF THE OHIO VALLEY THIS MORNING. CAUSING LIGHT FREEZING RAIN AND SNOW TO END ACROSS OUR AREA. SKIES ARE EXPECTED TO BECOME PARTLY SUNNY THIS AFTERNOON AS HIGH PRESSURE MOVES QUICKLY EAST THROUGH THE AREA ALLOWING TEMPERATURES TO RISE INTO THE UPPER 40S AND LOWER 50S. A COLD FRONT WILL DROP SOUTH ACROSS THE UPPER GREAT LAKES TONIGHT. DRY COLD FRONT EMANATING FROM SHEARED PV FILAMENT PASSING TO OUR NORTH WILL CROSS THE AREA DURING THE EARLY PART OF THE DAY SATURDAY. AS IS OFTEN THE CASE WITH MORNING COLD FRONTAL PASSAGES. COULD REMAIN STUCK IN THE LOW 40S WHILE A LATER FRONTAL PASSAGE IN OUR SOUTHEAST COULD ALLOW TEMPS TO APPROACH 60F.
1157 AM EDT FRI MAR 20 2015 LOW PRESSURE CROSSING THE OHIO VALLEY WILL BRING PRECIPITATION THROUGH MIDDAY. A WEAK COLD FRONT MAY PROVIDE A FEW SHOWERS TO NORTHERN PENNSYLVANIA ON SATURDAY. ELSEWHERE PREVIOUS SNOW AMOUNTS ACROSS THE RIDGES COUNTIES APPEAR IN GOOD SHAPE AS SYSTEM WILL BEGIN TO EXIT EAST BY EARLY AFTERNOON. BEFORE A COLD FRONT INVADES FROM THE NORTH. WITH VERY LITTLE BREAK BETWEEN THE EXITING SYSTEM FRIDAY NIGHT AND THE COLD FRONT SATURDAY NIGHT. A TONGUE OF WARMER AIR WILL PUSH IN FROM THE WEST AND DRIVE DAYTIME HIGHS ABOVE AVERAGE. HAVE TEMPERATURES HOLDING CLOSE TO WARMER NAM AND MAV NUMBERS. SATURDAY NIGHT A WEAK MID-LEVEL WAVE EJECTED FROM THE NORTHERN ROCKIES WILL PUSH THROUGH THE EASTERN GREAT LAKES AND BE CONSUMED BY THE LARGER UPPER LEVEL LOW. THE ASSOCIATED COLD FRONT WILL MOISTURE STARVED.
COLD FRONT OFFSHORE AT 9 AM MDT WILL SPREAD THROUGH OREGON TONIGHT AND CROSS SW IDAHO 6-9 AM SATURDAY. COOLER SATURDAY AND BREEZY IN THE AFTERNOON.
PRECIPITATION CHANCES SHOULD START TO SHOW UP LATER TONIGHT/EARLY FRIDAY MORNING AS THE NEXT LOW PRESSURE SYSTEM DIVING SOUTHWARD OUT OF CANADA WORKS THROUGH THE NORTHERN PLAINS. HIGH PRESSURE WILL SETTLE IN OVER THE REGION TONIGHT.
852 PM CDT THU MAR 26 2015 COLD FRONT MOVING ACROSS LOWER ACADIANA INTO THE EASTERN COASTAL WATERS THIS EVENING. /ISSUED 426 PM CDT THU MAR 26 2015/ A COLD FRONT IS EXITING LOWER ACADIANA THIS EVENING WITH TEMPERATURES FALLING ACROSS SOUTHEAST TEXAS AND WESTERN LOUISIANA. HIGH PRESSURE WILL BUILD OVER THE REGION THROUGH THE WEEKEND WITH COOL MORNING LOWS AND MILD AFTERNOON HIGH TEMPERATURES.
COLD FRONT HAS MOVED SOUTH OF THE REGION IN THE PAST SEVERAL HOURS. THE COMBINATION OF THE UPPER TROUGH WITH GOOD SPEED DIVERGENCE AND DIFFLUENCE ALOFT AS THE TROUGH MOVES EAST IS PROVIDING A FAVORABLE MID LEVEL ASCENT FOR SOME THUNDERSTORMS TO DEVELOP AND PRODUCE HAIL. HIGH PRESSURE WILL REMAIN IN CONTROL THROUGH THE DAY AND FRIDAY NIGHT WITH TEMPERATURES IN THE UPPER 50S.
COLD FRONT HAS MOVED EAST ACROSS INTERIOR SOUTHEAST MISSISSIPPI AND WILL SOON PASS MOB/BFM AND ACROSS PNS A SHORT TIME LATER BY 27.
STRENGTHENING HIGH PRESSURE ALOFT WILL CONTINUE TO RESULT IN DRY CONDITIONS AND ABOVE NORMAL DAYTIME TEMPERATURES THROUGH THE UPCOMING WEEKEND.
W/NW SFC WINDS LESS THAN 10KTS AS HIGH PRESSURE REMAINS IN CONTROL. /ISSUED 308 PM CDT THU MAR 26 2015/ NORTHWEST WINDS HAVE INCREASED TO AROUND 15 TO 20 MPH WITH HIGHER GUSTS BEHIND A COLD FRONT THAT MOVED ACROSS THE REGION TODAY. TEMPERATURES TONIGHT TO FALL INTO THE UPPER 30S TO LOWER 40S AREAWIDE AS COOL HIGH PRESSURE BUILDS ACROSS THE REGION.
/ISSUED 229 PM CDT THU MAR 26 2015/ FRONTAL SYSTEM NOW EAST OF NASHVILLE WITH MUCH COOLER TEMPS POURING INTO THE MID STATE AT EARLY AFTERNOON. SHARP UPPER TROUGH AXIS DOWN THROUGH FAR WESTERN TENNESSEE WILL SHIFT SLOWLY EAST TONIGHT. LOWS TONIGHT DOWN INTO THE LOW TO MIDDLE 30S. THERE COULD BE AN ISOLATED SPOT OR TWO THAT CLIPS THE FREEZING MARK NEAR THE KENTUCKY BORDER TONIGHT FROM STEWART COUNTY EAST INTO ROBERTSON COUNTY. FRIDAY NIGHT TEMPS DOWN INTO THE LOW TO MIDDLE 20S SO LOOKING FOR A HARD FREEZE SOME AREAS.
TEMPERATURES MAY FLIRT WITH THE FREEZING MARK IN SOME SPOTS IN THIS REGION.
AREA OF RAIN CONTINUES MOVING SLOWLY EASTWARD ACROSS MIDDLE TENNESSEE THIS EVENING, WITH TEMPERATURES DROPPING IN THE COOLER, POST-FRONTAL AIR MASS. CLEARING LINE HAS ALREADY REACHED CLARKSVILLE WITH THE UPPER TROUGH POISED TO MOVE ACROSS THE MID STATE OVERNIGHT. /ISSUED 229 PM CDT THU MAR 26 2015/ FRONTAL SYSTEM NOW EAST OF NASHVILLE WITH MUCH COOLER TEMPS POURING INTO THE MID STATE AT EARLY AFTERNOON. SHARP UPPER TROUGH AXIS DOWN THROUGH FAR WESTERN TENNESSEE WILL SHIFT SLOWLY EAST TONIGHT. LOWS TONIGHT DOWN INTO THE LOW TO MIDDLE 30S. THERE COULD BE AN ISOLATED SPOT OR TWO THAT CLIPS THE FREEZING MARK NEAR THE KENTUCKY BORDER TONIGHT FROM STEWART COUNTY EAST INTO ROBERTSON COUNTY. FRIDAY NIGHT TEMPS DOWN INTO THE LOW TO MIDDLE 20S SO LOOKING FOR A HARD FREEZE SOME AREAS.
A FAIRLY STRONG COLD FRONT CONTINUES TO MOVE ACROSS THE CWA THIS EVENING. THE UPPER TROUGH IS STILL HANGING BACK WELL TO OUR WEST WITH ENOUGH LIFT FOR POST-FRONTAL SHOWERS. THE SFC COLD FRONT WAS JUST NW OF A KTCL-KBHM LINE AT ISSUANCE TIME. THE COLD FRONT WILL BE NEAR KMGM BY 05Z AND DRIER AIR WILL BEGIN TO OVERSPREAD NORTH ALABAMA AFTER 09Z. MUCH COOLER TEMPS EXPECTED BEHIND FRONT.
H5 TROUGH AXIS IS JUST NOW ENTERING NW COUNTIES AND THUS AN ISOLATED SHOWER WILL REMAIN POSSIBLE ACROSS SOUTHERN 1/4 OF THE CWA THROUGH LATE EVENING /UNTIL DRIER AIR THEN SPREADS FARTHER S AND MID LEVEL TROUGH AXIS SHIFTS OVERHEAD/.
TEMPS HAVE FALLEN INTO THE LOWER 50S AREA WIDE WITH A FEW UPPER 40S. WHERE DEWPOINTS HAVE FALLEN INTO THE LOWER AND MIDDLE 30S. W/NW SFC WINDS LESS THAN 10KTS AS HIGH PRESSURE REMAINS IN CONTROL. /ISSUED 308 PM CDT THU MAR 26 2015/ NORTHWEST WINDS HAVE INCREASED TO AROUND 15 TO 20 MPH WITH HIGHER GUSTS BEHIND A COLD FRONT THAT MOVED ACROSS THE REGION TODAY. TEMPERATURES TONIGHT TO FALL INTO THE UPPER 30S TO LOWER 40S AREAWIDE AS COOL HIGH PRESSURE BUILDS ACROSS THE REGION.
As high pressure aloft builds over the area Friday morning, clouds should decrease after 18z.
HIGH PRESSURE OVER THE REGION TODAY PRODUCED RECORD WARMTH WITH SEVERAL NEW RECORD HIGHS BEING SET ACROSS THE FORECAST AREA. THE HIGH PRESSURE WILL REMAIN IN PLACE OVERNIGHT AND EARLY FRIDAY BEFORE A FAST MOVING TROUGH ARRIVES FROM THE WEST FRIDAY NIGHT. INSTABILITY WILL BEGIN TO INCREASE OVER CENTRAL AND NORTHEAST OREGON LATE FRIDAY AFTERNOON WHICH WILL LEAD TO SOME CONVECTIVE SHOWERS TO DEVELOP AHEAD OF THE APPROACHING TROUGH.
HIGH PRESSURE ALOFT WILL RESULT IN A SUNNY AND WARM DAY FOR FRIDAY. EVENING SATELLITE IMAGERY SHOWING CLEAR SKIES ACROSS THE ENTIRE REGION AS STRONG HIGH PRESSURE SITS OVER THE WESTERN CONUS.
930 PM PDT THU MAR 26 2015 HIGH PRESSURE ALOFT OVER CALIFORNIA WILL BRING ANOTHER UNSEASONABLY WARM DAY FRIDAY. THOUGH IT WILL BE A LITTLE BIT COOLER NEAR THE COAST DUE TO DEVELOPING ONSHORE FLOW.
1152 PM CDT THU MAR 26 2015 ACTIVE AND COOLER PATTERN IS IN PLACE ACROSS THE CONUS. SUBJECTIVE 12Z UPPER AIR ANALYSIS INDICATES 500MB TROUGH DIGGING INTO THE GREAT LAKES. WITH A COLD FRONT ACROSS MN/CENTRAL NEB TOWARD NM. THE REST OF THE NIGHT WILL BE DRY AND COOL AS HIGH PRESSURE SLIDES THROUGH THE AREA. A SHARP THERMAL GRADIENT WILL REMAIN ACROSS THE CWA AS UPPER-LEVEL TROUGH CONTINUES TO DIG INTO THE EAST AND RIDGING BUILDS TO THE WEST.
ANOTHER COLD FRONT IS NOW MAKING ITS WAY SOUTH INTO NORTHWEST OKLAHOMA. /ISSUED 336 PM CDT THU MAR 26 2015/ AS AN UPPER LEVEL TROUGH CONTINUES TO MOVE OFF TO OUR EAST TODAY.
Mid and high level clouds will continue to move across the area but as high pressure aloft builds, clouds should decrease after 18z Friday.
/ISSUED 426 PM CDT THU MAR 26 2015/ A COLD FRONT IS EXITING LOWER ACADIANA THIS EVENING WITH TEMPERATURES FALLING ACROSS SOUTHEAST TEXAS AND WESTERN LOUISIANA. HIGH PRESSURE WILL BUILD OVER THE REGION THROUGH THE WEEKEND WITH COOL MORNING LOWS AND MILD AFTERNOON HIGH TEMPERATURES.
MAIN ROUND OF SHOWERS/STORMS IS EXPECTED ON FRI AHEAD OF A STRONG COLD FRONT. SOUTH/SOUTHWEST WINDS WILL INCREASE AHEAD OF APPROACHING COLD FRONT.