Aikyam-Lab/Synoptic-Bench huggingface dataset:
A WEAK UPPER LOW WAS CENTERED OVER GA WHICH PUTS THE TN VALLEY IN AN UPPER NE FLOW WHILE IN THE MID LEVELS THE FLOW WAS EASTERLY. HIGH PRESSURE SITUATED ACROSS THE MID- ATLANTIC AND APPALACHIANS REGION CONTROLLED THE WEATHER ACROSS MUCH OF THE EASTERN CONUS. SOUTH OF THE HIGH. AN UPPER LEVEL LOW WAS PRESENT EAST OF THE SC/GA COAST. THIS LOW. AND UPPER RIDGING ACROSS THE SOUTHERN PLAINS WAS BRINGING A NORTHERLY UPPER FLOW ACROSS THE FORECAST AREA. THE HIGH SHOULD EXERT ITS INFLUENCE FURTHER WESTWARD. BUT WITH THE UPPER LOW STAYING NEAR THE SE COAST.
THE LOW THAT IS OVER THE PACIFIC NORTHWEST IS OPENING UP AND MOVING EAST. THE DOWNSTREAM RIDGE.
500MB RIDGING OVER TEXAS WILL PROVIDE SUBSIDENCE ACROSS DEEP SOUTH TEXAS THROUGH THE FORECAST PERIOD. HIGH TEMPERATURES TODAY AND LABOR DAY WILL RANGE FROM THE LOWER 90S NEAR THE COAST TO THE TRIPLE DIGITS ACROSS THE UPPER VALLEY.
HIGH PRESSURE SITUATED ACROSS THE MID- ATLANTIC AND APPALACHIANS REGION CONTROLLED THE WEATHER ACROSS MUCH OF THE EASTERN CONUS. SOUTH OF THE HIGH. AN UPPER LEVEL LOW WAS PRESENT EAST OF THE SC/GA COAST. THIS LOW. AND UPPER RIDGING ACROSS THE SOUTHERN PLAINS WAS BRINGING A NORTHERLY UPPER FLOW ACROSS THE FORECAST AREA. THE HIGH SHOULD EXERT ITS INFLUENCE FURTHER WESTWARD. BUT WITH THE UPPER LOW STAYING NEAR THE SE COAST.
936 AM EDT SUN SEP 6 2015 HIGH PRESSURE WILL KEEP VERY WARM CONDITIONS ACROSS THE REGION THROUGH THE REMAINDER OF THE LABOR DAY WEEKEND.
1251 PM EDT SUN SEP 6 2015 THE AVIATION SECTION HAS BEEN UPDATED BELOW HOT AND HUMID WEATHER WILL CONTINUE THROUGH LABOR DAY AS WEAK BUT BROAD HIGH PRESSURE OVER THE MID ATLANTIC STATES CONTINUES TO PROVIDE WARM AND MOIST SOUTHERLY FLOW TO CENTRAL INDIANA.
1007 AM EDT SUN SEP 6 2015 ISOLATED TO SCATTERED SHOWERS WITH A FEW THUNDERSTORMS WERE NEAR THE LOWER KEYS OVER THE PAST HOUR OR SO.
/ISSUED 445 AM CDT SUN SEP 6 2015/ WATER VAPOR IMAGERY SHOWS HIGH PRESSURE CENTERED OVER CENTRAL TEXAS AND OKLAHOMA THIS MORNING. WITH THE RIDGE AXIS EXTENDING NORTHEAST INTO MISSOURI AND ILLINOIS. THE ARKLATEX REMAIN UNDER THE INFLUENCE OF THIS RIDGE.
1018 AM EDT SUN SEP 6 2015 AVIATION SECTION UPDATED HOT AND HUMID WEATHER WILL CONTINUE THROUGH LABOR DAY AS WEAK BUT BROAD HIGH PRESSURE OVER THE MID ATLANTIC STATES CONTINUES TO PROVIDE WARM AND MOIST SOUTHERLY FLOW TO CENTRAL INDIANA.
The seemingly permanent subtropical ridge is centered right over the Southern Plains. There could be a little more convection over the Mtns with the thetae ridge. There is hope on the horizon for wetter and potentially cooler weather. A trough moving through the northern tier of states will flatten the ridge and drop a cold front south.
649 AM CDT SUN SEP 6 2015 SHORT TERM CONCERNS DOMINATED BY RAIN CHANCES AS THE COLD FRONT APPROACHES AND THEN MOVES THROUGH. THIS IS WELL AHEAD OF THE COLD FRONT. THE LOW LEVEL JET WILL WEAKEN.
HOWEVER MOST AREAS SHOULD REMAIN DRY WITH HIGHS TODAY IN THE LOW TO MID 90S. /ISSUED 610 AM CDT SUN SEP 6 2015/ THE MID SOUTH REMAINS POSITIONED BETWEEN AN UPPER LEVEL RIDGE AXIS CENTERED OVER THE SOUTHERN PLAINS AND AN UPPER LEVEL LOW MOVING SOUTHWESTWARD ACROSS THE SOUTHEASTERN STATES TODAY. THE UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE INTO THE NORTH CENTRAL GULF OF MEXICO BY MONDAY AS THE UPPER RIDGE EXPANDS EASTWARD.
/ISSUED 314 AM CDT SUN SEP 6 2015/ THE RIDGE. THE MONSOON MOISTURE IS BEGINNING TO MOVE A LITTLE FURTHER EAST AS THE RIDGE BREAKS DOWN. AM INCLINED TO KEEP POPS ON THE LOW SIDE ATTM. BY MONDAY MORNING UPPER LEVEL LOW WILL BE POSITIONED OVER CENTRAL SASKATCHEWAN AS THE FEATURE HELPS TO SQUASH HIGH PRESSURE OVER TEXAS.
652 AM CDT SUN SEP 6 2015 ANOTHER UNSEASONABLY WARM SEPTEMBER DAY IS ANTICIPATED ACROSS THE LOCAL AREA THIS AFTERNOON AS A COLD FRONT ACROSS NORTHERN NEBRASKA WORKS ITS WAY SOUTHEASTWARD. LIGHTER NORTHERLY WINDS AND MUCH COOLER TEMPERATURES AREA EXPECTED IN THE WAKE OF THIS APPROACHING FRONT. BIGGEST ISSUE WILL BE GETTING A GOOD HANDLE ON HOW FAST COOLER AND DRIER AIR MOVES IN. SOMEWHAT MODEST UPPER LEVEL FLOW AT THE BASE OF THE TROUGH WILL MOVE INTO OUR REGION.
A mid/upper level low centered over the GA/SC/NC region will gradually drift southwest through the afternoon. On the western side of this low, drier air is funneling south through parts of AL, GA, and the FL panhandle. At the surface, high pressure centered just about under the upper low, is nosing southwest as well.
911 AM EDT SUN SEP 6 2015 A RIDGE EXTENDING FROM HIGH PRESSURE ALONG THE EAST COAST WILL REMAIN OVER THE AREA THROUGH LABOR DAY.
The mid-level trough responsible for sending a cold front towards the area is currently tracking over southern Canada. Ahead of the front temperatures will range from the low 90s across east central KS to near 100 in central KS. How much of this develops in the daytime hours will impact storm strength later in the day, as shear is on the low end, and intensity will be more dependent on available CAPE.
DOUBT THERE WILL BE A LOT OF EASTWARD PROGRESS WITH THIS FOG/STRATUS BECAUSE BY THE TIME THE COLD FRONT/WIND SHIFT HITS OUR WESTERN ZONES. WITH MUCH DRIER AIR MOVING IN BEHIND THE COLD FRONT THIS AFTERNOON. LOWS TONIGHT WILL BE MUCH COOLER BEHIND THE FRONT.
618 AM CDT SUN SEP 6 2015 12Z TAF CYCLE UPPER HIGH OVER OKLAHOMA AND NORTH TEXAS WILL CONTINUE TO ALLOW MONSOONAL MOISTURE TO SPREAD NORTHEAST OUT OF THE SOUTHWESTERN STATES AND SOUTHERN ROCKIES ACROSS THE WESTERN PORTIONS OF THE FORECAST AREA TODAY THROUGH TONIGHT. AN ACTIVE SOUTHWESTERLY UPPER FLOW PATTERN ON THE WESTERN PERIPHERY OF THE UPPER HIGH SHOULD ALLOW FOR ISOLATED TO SCATTERED CONVECTION TO DEVELOP ACROSS MAINLY THE WESTERN PORTIONS OF THE PANHANDLES AND PERHAPS AS FAR EAST AS THE CENTRAL PORTIONS AS WELL. THE RIDGE THAT HAS BEEN ENTRENCHED OVER THE REGION WILL CONTINUE TO ERODE AND RETROGRADE BACK TOWARD THE DESERT SOUTHWEST THROUGH THE MIDDLE OF THE WEEK.
THE UPPER HIGH PRESSURE RIDGE HAS NOW CENTERED OVER TX. TEMPS WILL STILL WARM TO THE LOWER TO MID 90S WITH A FEW UPPER 90S.
HOT AND HUMID WEATHER WILL CONTINUE THROUGH LABOR DAY AS WEAK BUT BROAD HIGH PRESSURE OVER THE MID ATLANTIC STATES CONTINUES TO PROVIDE WARM AND MOIST SOUTHERLY FLOW TO CENTRAL INDIANA.
531 AM CST WED FEB 24 2016 DEEP LOW PRESSURE MOVING NORTHEAST THROUGH THE OHIO VALLEY TODAY WILL BRING CYCLONIC FLOW TO IOWA THROUGH TODAY.
Temperatures will warm back into the lower 60s across the area with abundant sunshine available for heating. This will keep temperatures on the cool side, with highs on Thursday ranging from the upper 50s across the Big Country, to the lower and middle 60s across southern portions of the forecast area.
AS LOW PRESSURE TO THE NORTH MOVES AWAY CEILINGS WILL GRADUALLY LIFT AND CLEAR AND WINDS WILL DECREASE THIS AFTERNOON AND EVENING. /ISSUED 517 AM CST WED FEB 24 2016/ STRONG AND GUSTY WEST WINDS ACROSS THE AREA THIS MORNING AS THE PRESSURE GRADIENT REMAINS TIGHT BEHIND A DEPARTING LOW PRESSURE SYSTEM OVER WRN TN. GRADIENT WILL GRADUALLY LOOSEN TODAY AND TONIGHT AS THE LOW CONTINUES TO PULL AWAY TO THE NE AND HIGH PRESSURE BUILDS INTO THE WRN GULF. COOLER AND DRIER WEATHER EXPECTED TO PREVAIL INTO THE WEEKEND.
MEANWHILE THE UPPER LOW IS CENTERED OVER WRN TN. TEMPS WILL FALL INTO THE LOWER 40S BY THE LATE AFTN.
CURRENT SURFACE ANALYSIS SHOWS RIDGE AXIS POSITIONED IN NW MINNESOTA. THE WAVE THEN ELONGATES AS IT ROUNDS THE BASE OF THE LONG WAVE TROUGH. AND PHASES WITH THE UPPER LEVEL FLOW FROM THE CLOSED LOW OVER THE CENTRAL GREAT LAKES THROUGH THE NIGHT. SUPPORTED PRIMARILY BY AN UPPER LEVEL LONGWAVE RIDGE OVER THE WEST COAST AND AN UPPER LOW OVER HUDSON BAY.
COLD FRONT HAS SWEPT THROUGH THE PLAINS WITH NORTHERLY SURFACE FLOW IN PLACE AREA WIDE. TO ALLOW HIGHS TO SOAR INTO THE LOW 70S FOR AREAS WEST OF I-135.
636 AM MST WED FEB 24 2016 A BROKEN LINE OF SNOW SHOWERS HAS DEVELOPED ALONG THE COLD FRONT AS IT HAS MOVED QUICKLY ACROSS NORTHWEST SD EARLY THIS MORNING. TODAY THROUGH THURSDAY NIGHT WITH COLD FRONT TRAILING WESTWARD ACROSS MT. WITH NORTHWEST FLOW OVER THE REGION AHEAD OF RIDGING OVER THE WEST COAST. COLD FRONT AND WEAKENING UPPER LEVEL SYSTEM WILL TRACK SOUTHEAST ACROSS THE REGION TODAY. BRINGING GUSTY WINDS AND COOLER AIR. WEAKENING UPPER LOW WILL TRACK EAST OF THE CWA TODAY. THE FRONT TO THE SOUTH AND WEST OF THE REGION ON THURSDAY WILL BEGIN TO MOVE BACK EAST ACROSS THE CWA AS A WARM FRONT THURSDAY NIGHT.
HIGH PRESSURE WILL REMAIN THE DOMINANT WEATHER FEATURE THROUGH THE WEEKEND. DRY NORTHWESTERLY FLOW ALOFT OVER ARIZONA WILL PERSIST OVER THE NEXT SEVERAL DAYS AS AN UPPER LEVEL RIDGE REMAINS STATIONARY ALONG THE WEST COAST. COOLER AIR IN THE WAKE OF THE TROUGH THAT BRUSHED BY THE AREA YESTERDAY WILL GET DISPLACED TODAY INTO THURSDAY WITH WARMING ALOFT TRANSLATING TO THE SURFACE. WE WILL GAIN ROUGHLY 10 DEGREES OF SURFACE WARMING THROUGH THURSDAY AS HIGHS AGAIN WARM BACK INTO THE LOWER TO MIDDLE 80S OVER THE DESERTS BY THURSDAY.
WE ARE STILL CONTENDING WITH SOME LIGHT RAIN AS THE UPPER LOW ASSOCIATED WITH YESTERDAYS WEATHER IS SPINNING ACROSS NORTHWEST MISSISSIPPI/EAST ARKANSAS/WEST TENNESSEE. AS THE UPPER TROUGH SWINGS NORTH INTO TENNESSEE THROUGH THE DAY. WE ARE ALREADY SEEING THESE WINDS INCREASE ACROSS THE AREA FOLLOWING THE COLD FRONTAL PASSAGE HOWEVER MOST LOCATIONS OUTSIDE OF THE DELTA IS NOT REACHING WIND ADVISORY CRITERIA AND HAVE GONE AHEAD AND CANCELED MOST AREAS EARLY. TEMPERATURES WILL CONTINUE TO BE COOLER THAN NORMAL THROUGH THE REST OF THE PERIOD AS A DRY FRONT MOVES THROUGH ON THURSDAY. THIS WILL REINFORCE THE COOLER. HIGHS ON THURSDAY WILL BE SLIGHTLY WARMER BUT IN THE 50S. OVERNIGHT LOWS TONIGHT WILL BE IN THE MID 30S BUT COOLER AND CLOSER TO FREEZING OR BELOW ON THURSDAY NIGHT.
DRY AND WARM AS AN UPPER RIDGE CONTROLS THE WEATHER. A WEAK COLD FRONT WILL BRING LIMITED SHOWERS TO NORTHERN NEVADA ON THE WEEKEND.
438 AM MST WED FEB 24 2016 12Z TAF CYCLE AREAS OF VLIFR CONDITIONS IN LOW STRATUS AND FREEZING FOG WILL CONTINUE THROUGH THE MID MORNING HOURS. TRANQUIL WEATHER RETURNS TO NEW MEXICO TODAY AS HIGH PRESSURE SLOWLY BUILDS IN FROM THE WEST. TEMPERATURES WILL WARM ALL AREAS TODAY BUT A WEAK BACKDOOR COLD FRONT WILL BRING A BRIEF COOL DOWN TO EASTERN NEW MEXICO THURSDAY.
A DEEP AREA OF LOW PRESSURE THAT MOVED ACROSS THE LOWER MS RIVER VALLEY AND CENTRAL GULF STATES YESTERDAY WILL CONTINUE TO SHIFT NORTHEAST OVER THE TN AND OH RIVER VALLEYS THROUGH TONIGHT AS THE MAIN UPPER TROF AXIS MOVES FROM THE TX/LA BORDER TO EAST OF THE FORECAST AREA THROUGH TONIGHT. SOME LIGHT RAIN WILL ALSO BE POSSIBLE WITH THE LOWER CLOUD DECK MOVING DOWN FROM THE NORTHWEST MOSTLY THIS MORNING. AS FOR TEMPS WILL LEAN TOWARDS THE COOLER MOS GUIDANCE THROUGH TONIGHT DUE TO MORE CLOUDS THROUGHOUT THE DAY AND ALONG WITH STRONG COLD AIR ADVECTION ACROSS THE DEEP SOUTH THROUGH TONIGHT.
445 AM MST WED FEB 24 2016 UPDATED FORECAST TO INCLUDE PATCHY FREEZING FOG ACROSS MUCH OF NWRN AND WEST-CENTRAL VALLEYS AS WELL AS MID AND UPPER RGV INCLUDING THE SANTA FE AND ABQ METRO AREAS THROUGH LATE MORNING. PATCHY FREEZING FOG. DEVELOPING ACROSS THE LOWER ELEVATIONS OF THE NW THIRD OR SO OF THE STATE THIS MORNING. 12Z TAF CYCLE AREAS OF VLIFR CONDITIONS IN LOW STRATUS AND FREEZING FOG WILL CONTINUE THROUGH THE MID MORNING HOURS. TRANQUIL WEATHER RETURNS TO NEW MEXICO TODAY AS HIGH PRESSURE SLOWLY BUILDS IN FROM THE WEST. TEMPERATURES WILL WARM ALL AREAS TODAY BUT A WEAK BACKDOOR COLD FRONT WILL BRING A BRIEF COOL DOWN TO EASTERN NEW MEXICO THURSDAY.
616 AM CST WED FEB 24 2016 Band of snow on the nw side of an upper level low over ne AR extends from the St. The band is associated with a trowal and deformation zone feature wrapping around the upper low. Accumulation has been more efficient in the higher elevation terrain where sfc temps have been just a bit colder.
HIGH PRESSURE WILL BUILD INTO THE WESTERN GREAT BASIN TONIGHT AND REMAIN IN PLACE THROUGH THE REMAINDER OF THE WEEK.
HIGH PRESSURE WILL MOVE OVER THE REGION AND IT WILL BE A BIT COOLER. TEMPS WILL BE COOL IN THE EAST WHERE THE HIGH WILL LINGER THE LONGEST.
WINDS WILL SHIFT OUT OF THE NORTH TO NORTHEAST LATE TONIGHT AS A COLD FRONT MOVES THROUGH THE PANHANDLES. /ISSUED 416 AM CST WED FEB 24 2016/ AS THE UPPER LEVEL LOW CONTINUES TO MOVE OFF TO OUR EAST. AN INTENSIFYING UPPER LEVEL RIDGE TO OUR WEST WILL PROVIDE NORTHWESTERLY FLOW ALOFT.
A STRONG LONG WAVE RIDGE IS NOW OVER THE AREA WITH THE RIDGE AXIS OVER EASTERN OREGON. A SHORT WAVE WILL RIDE OVER THE RIDGE LATE TONIGHT AND EARLY WEDNESDAY. THE ASSOCIATED COLD FRONT WILL MOVE ONSHORE WEDNESDAY MORNING. THE RIDGE WILL RETROGRADE BACK TO THE COAST THROUGH WEDNESDAY NIGHT.
WITH A FEW REPORTS OF 6 TO 8 INCHES IN THE HIGHEST ELEVATIONS. TEMPS HAVE RMND ABV FREEZING AT THE SFC/UPWARDS TO 1000 FEET ALOFT TO KEEP PRECIP ALL RAIN. OVERALL SNOW ACCUMULATIONS WL BE CONFINED TO THE HIGHER ELEVATIONS. FOLLOWED BY A REINFORCING SHOT OF COOLER AND DRIER AIR TO CLOSE OUT THE SHORT TERM.
DRY WEATHER CONDITIONS AND UNSEASONABLY WARM TEMPERATURES WILL CONTINUE THROUGH THE REMAINDER OF THE WORK WEEK AS HIGH PRESSURE REMAINS ALOFT.
431 AM CST WED FEB 24 2016 A LOOK AT WATER VAPOR IMAGERY THIS MORNING INDICATES UPPER LEVEL LOW HAS EJECTED NEWD INTO THE MID MS VALLEY WITH WRAP AROUND STILL ENCOMPASSING MUCH OF OUR REGION. PARTS OF E TX ARE ALREADY CLEARING WITH THE ADVECTION OF MUCH DRIER AIR WITH DEEP NW FLOW SETTING UP BEHIND OUR RECENT COLD FRONT.
243 AM PST WED FEB 24 2016 DRY WEATHER WILL CONTINUE FOR THE NEXT SEVERAL DAYS AS A RIDGE OF HIGH PRESSURE DOMINATES THE PATTERN. A STUBBORN RIDGE OF HIGH PRESSURE REMAINS ANCHORED SOUTHWEST OF SAN DIEGO AND THIS CONTINUES TO PUSH ANY INCOMING PACIFIC SYSTEMS TO THE NORTH OF CENTRAL CALIFORNIA.
830 AM MST WED FEB 24 2016 CANCELLED THE HIGH WIND WARNING EARLY FOR SOUTHWEST PLATTE COUNTY.
STRONG S/WV TROUGH/CLIPPER ADVANCING SOUTHEAST INTO THE NORTHERN PLAINS. HIGH PRESSURE BUILDING ACROSS THE WEST WILL SEE ANY PRECIPITATION ENDING THERE THIS EVENING. THERMAL RIDGE THEN BUILDS INTO THE AREA THROUGH THE END OF THE WEEK.
FURTHER WEST INTO SOUTH CENTRAL MONTANA THIS FRONT WILL STALL A BIT SO COOLER AIR WILL BE PRESENT BUT TEMPERATURES WILL BE STILL IN THE MID 40S. TONIGHT WILL SEE TEMPERATURES FALL INTO THE TEENS FOR MANY AREAS THAT HAVE SEEN LOW TEMPERATURES CLOSER TO FREEZING ALL MONTH. A FEW MORE DAYS OF DRY WEATHER EXPECTED UNDER UPPER-LEVEL RIDGING.
The general weather pattern for today and the rest of the workweek is still forecast to be dominated by high pressure.
DRY COLD FRONT IS EXPECTED TONIGHT. /ISSUED 219 AM CST WED FEB 24 2016/ NORTHWEST FLOW ALOFT WILL PERSIST NEXT 24 HOURS WHILE LOW ACROSS THE SRN CANADIAN PRAIRIES DIVES SE AND PHASES WITH MISSISSIPPI VALLEY LOW TO CREATE A MORE OR LESS EAST-WEST ORIENTED TROUGH FROM LAKE ERIE TO NEBRASKA BY THURSDAY MORNING. A BIT OF A COMPLICATED SURFACE FLOW CHANGE REGIME IS ANTICIPATED WITH NORTHWESTERLIES BECOMING WESTERLY BY LATE THIS AFTERNOON FOLLOWED BY A COLD FRONT TONIGHT WHICH WILL VEER DIRECTIONS BACK AROUND TO THE NORTH/NORTHEAST BY THURSDAY MORNING. MUCH WARMER TODAY THAN WE SAW YESTERDAY WITH MOSTLY CLEAR SKIES UNTIL SOME HIGH CLOUDS PASS OVERHEAD TOWARD MIDNIGHT. HOWEVER THIS COOL-DOWN WILL BE SHORT- LIVED AS AMPLIFIED UA RIDGING ACROSS THE WRN CONUS GRADUALLY EDGES EWRD TOWARDS THE SOUTHERN PLAINS FROM LATE WEEK THRU EARLY WEEKEND.
Surface dewpoints in the low to mid teens, even a few single digits. As such, radiational cooling has allowed many locales to fall well below freezing as of midnight.
Light northwest winds will back to the southwest/south this afternoon, ahead of a cold front that will begin to move through the area late in the forecast period. /issued 300 AM CST WED FEB 24 2016/ The upper low has passed well to the east as an upper ridge centered over the West Coast begins to build in.
A STRENGTHENING LOW PRESSURE SYSTEM IS LOCATED JUST SOUTH OF PADUCAH KENTUCKY MOVING NORTH NORTHEAST AT 35-40 MPH. WINDS ARE INCREASING ON THE LOW END OF GUIDANCE AND WITH PRECIPITATION STAYING TO OUR EAST WILL BE USED TO ADJUST MAX GUSTS TODAY. UPPER LOW IN NORTH DAKOTA IS DIVING SOUTHEAST BEHIND OHIO VALLEY STORM SYSTEM SUPPORTING CLOUDS AND POSSIBLY FLURRIES TONIGHT AND MAYBE ISOLATED THURSDAY. ANY SNOW THAT WOULD FALL THERE WITH TEMPERATURES ABOVE FREEZING WOULD HAVE NO IMPACT AND LIKELY WOULD BE A QUARTER OF AN INCH IN DEPTH OR LESS ANYWAY IN GRASSY AREAS.
444 AM CST WED FEB 24 2016 WRAPAROUND CLOUDS FINALLY CLEARING SE TX THIS MORNING AS THE MAIN UPPER LOW MOVES OFF TO THE E/NE. NO SIGNIFICANT ISSUES THESE NEXT SEVERAL DAYS AS UPPER LEVEL RIDGING TO THE WEST KEEPS A STEADY NW FLOW ALOFT IN PLACE ACROSS THE REGION. THE STRONG NW WINDS MIXING DOWN TO THE SFC SHOULD BE WEAKENING BY THIS AFTN AS HIGH PRESSURE BUILDS OVER THE AREA. A REINFORCING SHOT OF COOL/DRY AIR EXPECTED THURS WITH ANOTHER COLD FRONT. THE UPPER RIDGE BREAKING DOWN OVER THE WEEKEND WILL ALSO COINCIDE WITH THE RETURN OF ONSHORE WINDS ACROSS THE AREA. RAIN CHCS COULD BE ENHANCED BY TUES/WEDS WITH THE POSSIBLE DEVELOPMENT OF A STRONG UPPER LOW TO OUR W/NW. HIGH PRESSURE BUILDS BRIEFLY BEFORE THE NEXT FRONT ARRIVES THURSDAY LATE AFTERNOON.
OTHER PRIMARY ISSUE OF COURSE WILL BE THESE STIFF NWRLY WINDS TODAY AS A TIGHT GRADIENT JUST SLOWLY RELAXES WITH HIGH PRESSURE APPROACHING. WITH A TRAILING COLD FRONT NOW MOVING OFF THE SERN LA COASTLINE. WATER VAPOR IMAGERY SHOWS A CLOSED LOW CROSSING THE LOWER MISSISSIPPI VALLEY ATTM. LIKEWISE LIGHT PRECIP SHOULD BE DEPARTING THE ERN ZONES RIGHT ABOUT 12Z AS THE LOWS CONTINUE MAKING STEADY EWD/NEWD PROGRESS AWAY FROM THE FORECAST AREA. MUCH COOLER TEMPS ARE EXPECTED IN THEIR WAKE WITH MAXES TODAY RUNNING ABOUT 10 DEGREES COOLER THAN THE PAST COUPLE OF DAYS. EXPECTING A RATHER CHILLY NIGHT TONIGHT AS THE CORE OF THE HIGH SETTLES TO OUR WEST ALLOWING FOR A DECENT RADIATING NIGHT.
416 AM CST WED FEB 24 2016 AS THE UPPER LEVEL LOW CONTINUES TO MOVE OFF TO OUR EAST. AN INTENSIFYING UPPER LEVEL RIDGE TO OUR WEST WILL PROVIDE NORTHWESTERLY FLOW ALOFT.
WHERE MVFR CONDITIONS CONTINUE AS LOW CLOUDS CONTINUE TO WRAP AROUND A LOW PRESSURE SYSTEM IN ARKANSAS. EXPECT VFR CONDITIONS TO SPREAD TO ALL THE SITES BY 24/21Z AS THE LOW CONTINUES TO MOVE ENE OUT OF THE REGION. /ISSUED 431 AM CST WED FEB 24 2016/ A LOOK AT WATER VAPOR IMAGERY THIS MORNING INDICATES UPPER LEVEL LOW HAS EJECTED NEWD INTO THE MID MS VALLEY WITH WRAP AROUND STILL ENCOMPASSING MUCH OF OUR REGION. PARTS OF E TX ARE ALREADY CLEARING WITH THE ADVECTION OF MUCH DRIER AIR WITH DEEP NW FLOW SETTING UP BEHIND OUR RECENT COLD FRONT.
COLD FRONT NOW PROGRESSING NEAR THE I-65 CORRIDOR AND WILL CONTINUE TO PRESS EASTWARD THROUGH THE MORNING. THESE CELLS ARE JUST AHEAD OF THE COLD FRONT AND ARE MOVING A FAIRLY GOOD PACE. AN UPPER LOW WILL THEN SWING THROUGH THE NORTHERN HALF OF THE AREA DURING THE DAY AND EARLY EVENING.
NORTHERLY FLOW ALOFT CONTINUES TODAY AS STRONG UPPER LOW PRESSURE SYSTEM MOVES NE INTO THE OHIO RIVER VALLEY.
OTHERWISE THE PERSISTENT WESTERN RIDGE REBOUNDS THROUGH THESE PERIODS FOR A DRY WARMING TREND.
CONCUR WITH THE GFS THAT STRONG SUBSIDENCE EXPECTED TODAY OVER THE CWA/MSA BEHIND AN UPPER LOW THAT LIFT RAPIDLY TOWARD THE NORTHEAST. SIGNIFICANTLY WARMER THURSDAY OWING TO AIRMASS MODIFICATION.
ISSUED BY NATIONAL WEATHER SERVICE LAKE CHARLES LA 448 AM CST WED FEB 24 2016 STRONG AND GUSTY WEST WINDS ACROSS THE AREA THIS MORNING AS THE PRESSURE GRADIENT REMAINS TIGHT BEHIND A DEPARTING LOW PRESSURE SYSTEM OVER WRN TN. GRADIENT WILL GRADUALLY LOOSEN TODAY AND TONIGHT AS THE LOW CONTINUES TO PULL AWAY TO THE NE AND HIGH PRESSURE BUILDS INTO THE WRN GULF. COOLER AND DRIER WEATHER EXPECTED TO PREVAIL INTO THE WEEKEND.
629 AM EST WED FEB 24 2016 A DYNAMIC LOW PRESSURE SYSTEM CONTINUES TO LIFT NE TOWARDS WESTERN KY/SOUTHERN INDIANA THIS MORNING ALLOWING FOR ROUNDS OF SHOWERS TO CROSS THROUGH THE FORECAST AREA. IN ADVANCE OF THE APPROACHING LOW AND WARM FRONT. THE LOW LEVEL JET WILL CONTINUE TO STRENGTHEN WITH AN INCREASE IN SHOWER ACTIVITY EXPECTED THROUGH THE AFTERNOON. HAVE EXTENDED THE HIGH WIND ADVISORY FOR HARLAN AND LETCHER COUNTIES THROUGH 1AM TONIGHT. AS THE LOW LIFTS OFF TO THE NE. EXPECT TO SEE SNOW EVEN WITH SFC TEMPS ABOVE FREEZING. A VERY LARGE AND INTENSE LOW PRESSURE SYSTEM OVER SOUTHERN QUEBEC AT THE START OF THE PERIOD WILL BE DEPARTING TO THE NORTHEAST.
543 AM CST WED FEB 24 2016 RIDGE CONTINUES TO DOMINATE THE WESTERN CONUS. WHILE A DEEP TROUGH IS IN THE EAST. THIS PLACES THE HIGH PLAINS IN FAST MOVING NORTHWEST FLOW. WHERE WINDS HAVE FALLEN TO AROUND 5 MPH OR LESS TEMPS HAVE COOLED INTO THE LOWER 20S AND TEENS. WHICH IS ACTUALLY CLOSE TO SEASONAL NORMS AND ONE OF THE COOLER NIGHTS FOR MANY LOCATIONS IN RECENT DAYS. LINGERING CLOUDS IN THE EAST TOWARDS MORNING WILL KEEP TEMPS IN THE LOWER TO MID 20S.
Strong southwesterly winds will become westerly after the cold front passes. The associated cold front is currently over Mississippi and will move through the region late this morning. Temperatures will be cooler today once the cold front passes.
AN UPPER LOW WILL DROP THROUGH THE DAKOTAS TODAY AND TONIGHT.
A DYNAMIC LOW PRESSURE SYSTEM CONTINUES TO LIFT NE TOWARDS WESTERN KY/SOUTHERN INDIANA THIS MORNING ALLOWING FOR ROUNDS OF SHOWERS TO CROSS THROUGH THE FORECAST AREA. IN ADVANCE OF THE APPROACHING LOW AND WARM FRONT. THE LOW LEVEL JET WILL CONTINUE TO STRENGTHEN WITH AN INCREASE IN SHOWER ACTIVITY EXPECTED THROUGH THE AFTERNOON. HAVE EXTENDED THE HIGH WIND ADVISORY FOR HARLAN AND LETCHER COUNTIES THROUGH 1AM TONIGHT. AS THE LOW LIFTS OFF TO THE NE. EXPECT TO SEE SNOW EVEN WITH SFC TEMPS ABOVE FREEZING. A VERY LARGE AND INTENSE LOW PRESSURE SYSTEM OVER SOUTHERN QUEBEC AT THE START OF THE PERIOD WILL BE DEPARTING TO THE NORTHEAST.
1046 AM EST WED FEB 24 2016 SHOWERS AND POSSIBLE THUNDERSTORMS TODAY AS A POTENT LOW PRESSURE SYSTEM MOVES IN. EXPECTING CLOUDS AND PRECIPITATION TO FILL BACK IN FROM THE SOUTHWEST TODAY AS THE CENTER OF THE LOW APPROACHES. THIS WILL STEEPEN LOW-LEVEL LAPSE RATES THIS AFTERNOON AHEAD OF THE COLD FRONT. BRIEF RESPITE FROM HEAVIER PRECIPITATION AND WINDS LATE THIS EVENING AS THE LOW PIVOTS TO OUR NORTHWEST AND BECOMES VERTICALLY STACKED. COLD AIR WILL BEGIN TO POUR IN BEHIND THE LOW OVERNIGHT. TAX SNOW SHOWERS WILL INCREASE THURSDAY INTO THURSDAY NIGHT AS BACKLASH SNOW WILL WORK ACROSS REGION WITH UPSLOPE FLOW AND FAIRLY DEEP MOISTURE BRINGING BETTER ACCUMULATIONS IN THE RIDGES. WITH 2 TO 4 IN THE HIGHER RIDGES.
HOWEVER MODELS DID TEND TO NOT HAVE THE WESTERN RIDGE STRONG ENOUGH AND TOO FAR EAST. THE GFS/CANADIAN WERE DOING A LITTLE BETTER THAN THE NAM/SREF ON THE LOW LEVEL THERMAL FIELD. SYSTEM MOVING IN FROM CANADA WILL PUSH A BACKDOOR COLD FRONT THROUGH THE AREA. GUIDANCE WAS EITHER THE SAME OR WARMER FROM YESTERDAY. WENT TOWARD THE COOLER GUIDANCE. MAINLY A LITTLE COOLER IN THE EAST.
THIS FOG IS NOT EXPECTED TO BE AS BAD AS YESTERDAY AS WINDS WILL CONTINUE TO INCREASE AHEAD OF AN APPROACHING LOW PRESSURE SYSTEM FROM THE SOUTH. A STRONG LOW PRESSURE SYSTEM OVER THE SOUTHERN MISSISSIPPI VALLEY WILL TRACK NORTH NORTHEAST TOWARDS THE OHIO VALLEY TODAY. HIGHS THURSDAY WILL BE COOLER. WITH TEMPERATURES RANGING FROM THE MIDDLE 20S TO THE LOWER 30S.
AN UPPER RIDGE WILL REMAIN STRONG OVER THE WEST COAST THROUGH THURSDAY.
TODAY THROUGH THURSDAY NIGHT WITH COLD FRONT TRAILING WESTWARD ACROSS MT. WITH NORTHWEST FLOW OVER THE REGION AHEAD OF RIDGING OVER THE WEST COAST. COLD FRONT AND WEAKENING UPPER LEVEL SYSTEM WILL TRACK SOUTHEAST ACROSS THE REGION TODAY. BRINGING GUSTY WINDS AND COOLER AIR. WEAKENING UPPER LOW WILL TRACK EAST OF THE CWA TODAY. THE FRONT TO THE SOUTH AND WEST OF THE REGION ON THURSDAY WILL BEGIN TO MOVE BACK EAST ACROSS THE CWA AS A WARM FRONT THURSDAY NIGHT.
845 AM MST WED FEB 24 2016 HIGH PRESSURE WILL REMAIN THE DOMINANT WEATHER FEATURE THROUGH THE WEEKEND. THE SWRN CONUS REMAINS WITHIN A NWLY FLOW REGIME THIS MORNING DOWNSTREAM OF RIDGING SITUATED ALONG THE NORTH AMERICAN WEST COAST. HOWEVER A STOUT INVERSION AND ELEVATED MIXED LAYER AROUND THE H7 LAYER HAS TRAPPED MUCH COOLER AIR IN THE SFC-H8 LAYER. TEMPERATURES IN THIS LOWER BOUNDARY LAYER ONLY FALL IN THE MEDIAN VALUE THRESHOLD. HOWEVER A COOLER BEGINNING THIS MORNING AND WEAKENING PRESSURE GRADIENT MAY NOT ALLOW THE FULL POTENTIAL OF WARMING TO OCCUR.
WARMER AND LESS WIND TODAY. TEMPS WERE QUITE COOL WITH READING AOA 20F ON THE PLAINS AND TEENS AND SINGLE DIGITS IN THE HIGHER TERRAIN.