Aikyam-Lab/Synoptic-Bench huggingface dataset:
933 AM EDT SUN APR 12 2015 HIGH PRESSURE CENTERED ACROSS THE VIRGINIAS WILL MOVE OFF THE COAST BY MONDAY. A COLD FRONT ACROSS THE NORTHERN AND CENTRAL PLAINS WILL MOVE ACROSS THE MIDWEST AND WESTERN GREAT LAKES TODAY AND ACROSS THE LOCAL AREA ON MONDAY. HIGH PRESSURE AND FAIR WEATHER WILL FOLLOW FOR MID WEEK. EXCEPT LOCATIONS THAT ARE STILL DECOUPLED AND HAVE TEMPERATURES IN THE LOWER/MID 30S. EXPECT HIGHS TODAY UNDER NEARLY FULL SUN TO BE SEVERAL DEGREES WARMER THAN YESTERDAY. STILL COOLER NEAR THE LAKE WITH A LAKE BREEZE EXPECTED. EVEN BETTER FRONTAL TIMING AGREEMENT THIS MORNING WITH THE COLD FRONT FOR MONDAY.
NUDGED HIGH TEMPS UP A FEW DEGREES ACROSS POST-COLD FRONTAL PORTION OF THE CWA. AHEAD OF A COLD FRONT THAT IS NOW INTO WESTERN COUNTIES. HIGH PRESSURE MOVES ACROSS THE INTERMOUNTAIN WEST TONIGHT SO WINDS WILL SHIFT TO WESTERLY AND WEAKEN. AS THE HIGH PRESSURE SYSTEM MOVES EAST. THE REGION WILL BE BETWEEN HIGH PRESSURE TO THE EAST AND LOW PRESSURE TO THE WEST WHEN THE PERIOD STARTS. THE LOW WILL TRACK EAST.
957 AM EDT SUN APR 12 2015 HIGH PRESSURE WILL BRING DRY AND MILD WEATHER TODAY AND MONDAY.
754 AM EDT SUN APR 12 2015 HIGH PRESSURE WILL PROVIDE DRY WEATHER TODAY. THE NEXT COLD FRONT ARRIVES MONDAY NIGHT. HIGH PRESSURE OVER THE MID ATLANTIC REGION WILL CONTINUE TO BRING DRY AND SESONABLY WARM WEATHER TODAY. MAIN EVENT DURING THE SHORT TERM PERIOD IS APPROACH AND PASSAGE OF A COLD FRONT MONDAY AND MONDAY NIGHT. SHEARING OUT SLIGHTLY AS IT BUMPS INTO EAST COAST RIDGE. OVERNIGHT LOWS WILL REMAIN ABOVE NORMAL AS WELL WITH COOLER AIR ARRIVING LATE.
1009 AM EDT SUN APR 12 2015 HIGH PRESSURE WILL BUILD OVER THE REGION TODAY AND MOVE OFFSHORE MONDAY AS A COLD FRONT APPROACHES FROM THE WEST.
AND ON INTO MONDAY AS A SERIES OF DISTURBANCES CONTINUE TO MOVE ACROSS THE AREA IN THE SOUTHWEST FLOW ALOFT AND A STRONGER MID/UPPER LEVEL LOW MOVES INTO WEST TEXAS. AS UPPER LOW MOVES EWD AND INTO WEST TX TONIGHT LARGE SCALE LIFT WILL FURTHER INCREASE AND DIFFLUENCE ALOFT BECOMES BETTER DEFINED. WILL MAINTAIN LIKELY UPPER LOW HEADS INTO THE PLAINS EARLY IN THE WEEK AND SHEARS OUT. PACIFIC NW TROF DIGS SWD INTO THE DESERT SW LATER IN THE WEEK THEN KICKS OFF THE THE EAST ACROSS N TX/OK THIS WEEKEND. WINDS ACROSS THE COASTAL WATERS WILL REMAIN FROM THE S/SE THESE NEXT SEVER- AL DAYS AS THE COLD FRONT INITIALLY FCST FOR LATE MON IS NOW NOT EXP- ECTED TO EVEN REACH THE COASTLINE.
MID AND HIGH CLOUDS WILL SPREAD ACROSS MIDDLE TENNESSEE THIS MORNING, WITH WINDS PICKING UP FROM THE SOUTH AS THE SURFACE PRESSURE GRADIENT TIGHTENS UP AHEAD OF AN APPROACHING WARM FRONT.
CURRENT WATER VAPOR IMAGE SHOWS AN UPPER TROUGH STARTING TO DIG NEAR 42N AND 155W. THIS WILL ALLOW WEAK RIDGING TO BUILD INTO THE AREA TODAY BRINGING DRY AND MILDER CONDITIONS. TEMPERATURES THIS AFTERNOON WILL END UP BETWEEN 10-15 DEGREES WARMER THAN YESTERDAY. THE ABOVE MENTIONED TROUGH WILL MOVE EAST AND EVOLVE INTO AN UPPER LOW. AT THE SURFACE, A COLD FRONT WILL REACH THE COAST MONDAY AFTERNOON THEN MOVE INLAND MONDAY NIGHT.
1001 AM EDT SUN APR 12 2015 HIGH PRESSURE ALONG THE MID ATLANTIC COAST WILL PROVIDE DRY WEATHER AND MODERATING TEMPERATURES THROUGH MONDAY. A COLD FRONT WILL CROSS THE REGION MONDAY NIGHT BRINGING A BRIEF PERIOD OF SHOWERS.
COLD FRONT HALLOCK THROUGH GRAND FORKS TO WEST OF FARGO. BUT IT WILL BE CLOSE ENOUGH TO KEEP SOME THUNDER NEAR THE COLD FRONT. AND TEMPS WILL BE COOLER THAN YESTERDAY.
THE FRONT ALONG THE GULF COAST WILL GRADUALLY MOVE NORTH AS A WARM FRONT THROUGHOUT THE DAY. A COLD FRONT WILL ALSO BE APPROACHING THE REGION FROM THE NORTHWEST ON MONDAY.
NEAR THE UPPER LEVEL TROUGH AXIS ASSOCIATED WITH THIS DISTURBANCE. HOWEVER REDEVELOPMENT OF AN ALMOST BROKEN DECK IS OCCURRING THIS MORNING ALONG THE UPPER LEVEL TROUGH AXIS ASSOCIATED WITH THIS ENTITY IN NW ALABAMA. MODELS SEEM TO BE UNDERESTIMATING THE SHARPNESS OF THE TROUGHING ASSOCIATED WITH THE DISTURBANCE MOVING ALONG THE FRONT. AND DEWPOINT DEPRESSIONS DO DROP NEAR THIS TROUGH AXIS FROM 4 TO 8 DEGREE AT 500 MB. MODEL RH VALUES IN THE UPPER LEVELS ALSO ASSOCIATED WITH THIS TROUGH AXIS SEEM TO BE A BIT LOW BASED ON 500 MB ANALYSIS.
AHEAD OF A COLD FRONT THAT IS NOW INTO WESTERN COUNTIES. HIGH PRESSURE MOVES ACROSS THE INTERMOUNTAIN WEST TONIGHT SO WINDS WILL SHIFT TO WESTERLY AND WEAKEN. AS THE HIGH PRESSURE SYSTEM MOVES EAST. THE REGION WILL BE BETWEEN HIGH PRESSURE TO THE EAST AND LOW PRESSURE TO THE WEST WHEN THE PERIOD STARTS. THE LOW WILL TRACK EAST.
WE WILL CONTINUE WITH THE HIGH CHANCE POPS IN THIS AREA AS THE WAVE PASSES. THIS SYSTEM WILL ALLOW FOR THE CURRENT WESTERN SD/NEB COLD FRONT TO ADVANCE EASTWARD THIS AFTERNOON AND INTO FAR NORTHEAST NEBRASKA AROUND 21Z. THIS COUPLED WITH THE ADVECTION OF THE EML FROM THE HIGH PLAINS WILL CREATE AROUND 1000-1300 J/KG OF MLCAPE ALONG THE BOUNDARY. THE COLD FRONT IS PUSHING THROUGH THE AREA. ANY LINGERING SHOWERS AND ISOLATED THUNDERSTORMS SHOULD BE PUSHING OUT OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA BY MIDNIGHT WITH THE COLD FRONT GENERALLY JUST OUT OF THE COUNTY WARNING AREA BY 06Z.
640 AM CDT Sun Apr 12 2015 Wave of showers and embedded storms over the Plains this morning is associated with a 35-knot low-level jet and an elevated warm front around 850 hPa. Still expect another round of thunderstorms to develop later this evening as a cold front moves in from the north.
BUT THE WIND CHILL MAKES IT FELL SLIGHTLY COOLER. W TO NW FLOW ALOFT CONTINUES THROUGH TONIGHT AS AN UPPER LEVEL TROUGH MOVES FROM EASTERN MT INTO THE DAKOTAS.
NEAR CRITICAL FIRE WEATHER CONDITIONS POSSIBLE TODAY ACROSS THE MAIN PLAYER IN THE WEATHER TODAY WILL BE THE UPPER TROF MOVING ACROSS NORTHERN CO. AND ALREADY SEEING GUSTS TO NEAR 20 KTS OFF AND ON ALONG THE LOWER EASTERN SLOPES OF THE MOUNTAINS. AS THE UPPER TROF PASSES. NAM12 CONTINUES TO SPIT OUT SOME SPOTTY SHOWERS ACROSS THE HIGH COUNTRY. TEMPERATURES TONIGHT WILL BE COOLER AS WINDS SWING AROUND FROM THE NORTHEAST THEN EAST AND DIMINISH TOWARDS MORNING. UPPER LOW OVER OLD MEXICO WILL TRANSLATE EASTWARD ALONG THE SRN U.
1114 AM EDT SUN APR 12 2015 HIGH PRESSURE WILL DRIFT ACROSS NORTHERN VIRGINIA TODAY PROVIDING PLENTY OF SUNSHINE FOR OUR REGION. A COLD FRONT WILL BRING A FEW SHOWERS IN MOST PLACES MONDAY AFTERNOON AND NIGHT.
Will see decent cloud cover today, so will trend towards the cooler guidance and kept highs in the upper 60s far north to the mid 70s far south, where the cloud cover may be thinner.
THE MORNING CONVECTION SHOULD EXIT STAGE RIGHT BY MIDDAY WITH RENEWED SURFACE BASED CONVECTION EXPECTED DURING THE LATE AFTERNOON ALONG THE SURFACE COLD FRONT AND DRY-LINE WHICH IS PROGGED TO MOVE INTO CENTRAL KANSAS. DRIER AND COOLER WEATHER STILL LOOKS TO BE ON TRACK FOR MONDAY AND MONDAY NIGHT.
ANY SHRA ASSOCIATED WITH THE TROUGH WILL QUICKLY DEPART MONDAY MORNING WITH GUSTY WEST WINDS/DRYING AND NVA TAKING HOLD. FORECAST CONFIDENCE HIGH MAY BE A BREAK IN THE SHOWERS BETWEEN THE DEPARTING AFTERNOON SHORT WAVE AND FORCING ALONG FRONT AND AHEAD OF MID-LEVEL TROUGH. WILL START POPS IN THE CHANCE CATEGORY AND RAISE THEM TO CATEGORICAL IN THE WEST BY 06Z THEN TAKE THE HIGHER POPS ACROSS THE REST OF THE CWA OVERNIGHT WITH THE FRONT.
918 AM PDT Sun Apr 12 2015 Weak high pressure over region for fair skies and warmer temperatures today.
WITH MOST LOCATIONS IN THE LOW TO MID 70S THIS AFTERNOON.
HIGH PRESSURE CENTERED ACROSS THE MIDDLE ATLANTIC REGION WILL MOVE OFF THE COAST TONIGHT. THE RIDGE WILL MOVE OFF THE COAST TONIGHT. A FRONT ACROSS SOUTH GEORGIA INTO THE LOW COUNTRY SOUTH CAROLINA WILL REMAIN NEARLY STATIONARY. MODELS INDICATE MOISTURE RETURN INTO THE AREA WITH RIDGE OFFSHORE.
SKIES WILL BE MOSTLY SUNNY TO SUNNY ACROSS THE AREA THIS AFTERNOON THEN HIGH CLOUDS WILL INCREASE EARLY THIS EVENING IN ADVANCE OF THE NEXT COLD FRONT.
1040 AM EDT SUN APR 12 2015 HIGH PRESSURE CENTERED OVER THE AREA TODAY WILL MOVE OFFSHORE THIS EVENING.
Q-VECTOR PLOTS INDICATE THAT UPPER-LEVEL FORCING FOR ASCENT IS FOCUSED MOSTLY TO THE NORTH OF THE CWA WHERE STRONGER DCVA WILL BE AS THE MID-LEVEL TROUGH AXIS WILL BE MUCH MORE DEFINED ACROSS MN/WI. 50 INCHES POOL ALONG AND AHEAD OF THE COLD FRONT BETWEEN 03Z-12Z. BELOW AVERAGE CONFIDENCE OF LOW CHANCE POPS LATE IN THE WEEK WITH CLOSED UPPER LOW IN SOUTH PLAINS.
439 AM PDT SUN APR 12 2015 A RIDGE OF HIGH PRESSURE WILL PROVIDE DRY WEATHER AND ABOVE NORMAL AFTERNOON TEMPERATURES TO THE CENTRAL CALIFORNIA INTERIOR THROUGH MONDAY.
FIRST OFF EARLY MORNING SFC ANALYSIS SHOWS AN IMPRESSIVE COLD FRONT JUST NORTH OF THE I-10 CORRIDOR.
549 AM CST SUN FEB 22 2015 A STRONG COLD FRONT IS MOVING THROUGH THE AREA WITH GUSTY NORTH WINDS AND IFR-MVFR CIGS ACROSS NORTHERN OKLAHOMA. THERE MAY BE ENOUGH OF A WARM LAYER TO PARTIALLY MELT THE SNOW AS IT FALLS BEFORE REFREEZING IN THE COLD LAYER BELOW. BUT THERE ARE ALSO SUGGESTIONS THAT WE MAY LOSE MOISTURE IN THE DENDRITIC GROWTH ZONE REGIONS ALOFT AT TIMES THROUGH THIS EVENT SUGGESTING SUPERCOOLED WATER FREEZING IN THE COLD LAYER. ALTHOUGH FREEZING RAIN IS NOT COMPLETELY OUT OF THE QUESTION IN THE SOUTH TODAY.
HIGH PRESSURE ALOFT WILL PREVAIL OVER THE REGION THROUGH MONDAY FOR CONTINUED DRY WEATHER.
/ISSUED 241 AM EST SUN FEB 22 2015/ THE PRESSURE GRADIENT WILL BEGIN TO WEAKEN TODAY AS HIGH PRESSURE OVER THE WESTERN ATLANTIC SHIFTS FURTHER TO THE NORTHEAST. A WEAK AREA OF LOW PRESSURE WILL ALSO FORM ACROSS THE SOUTHEAST. TEMPERATURES WILL WARM TO NEAR 80 INTO THE LOWER 80S TODAY. A COLD FRONT WILL MOVE INTO NORTH FLORIDA ON MONDAY. TEMPERATURES WILL WARM INTO THE LOWER 80S ONCE AGAIN.
321 AM MST SUN FEB 22 2015 THE FLOW ALOFT OVER NRN CO WILL BACK TODAY AS AN UPPER LEVEL TROUGH INTENSIFIES OVER THE WRN US. MEANWHILE IN THE LOWER LEVELS THE FLOW WILL BECOME MORE ESE TODAY AND THEN SELY TONIGHT. AT THE SFC WIL PROBABLY SEE SOME TYPE OF DENVER CYCLONE SPIN UP OVER DOUGLAS COUNTY WHICH COULD ENHANCE LOW LVL FLOW INTO THE FOOTHILLS THIS AFTN INTO THE EVENING HOURS.
A COLD FRONT WAS PROGRESSING THROUGH NORTHERN PORTION OF THE AREA SLIGHTLY BEHIND SCHEDULE.
WARMER AIR MASS STILL ON TAP FOR MONDAY AND EVEN WITHOUT GREAT MIXING WE SHOULD BE QUITE A BIT WARMER THAN TODAY.
AN ARCTIC HIGH PRESSURE TRACKING SOUTHEASTWARD ACROSS THE REGION WILL PRODUCE BITTER COLD TEMPERATURES TODAY AND TONIGHT. WHICH SHOULD RESULT IN HIGHS IN THE SINGLE DIGITS BELOW TO THE LOWER TEENS.
ARCTIC HIGH PRESSURE OVER THE NORTHERN PLAINS WILL PLUNGE SOUTHEAST TO CENTRAL INDIANA ON MONDAY.
321 AM MST SUN FEB 22 2015 CORRECTED WATCH/WARNING/ADVISORY SECTION THE FLOW ALOFT OVER NRN CO WILL BACK TODAY AS AN UPPER LEVEL TROUGH INTENSIFIES OVER THE WRN US. MEANWHILE IN THE LOWER LEVELS THE FLOW WILL BECOME MORE ESE TODAY AND THEN SELY TONIGHT. AT THE SFC WIL PROBABLY SEE SOME TYPE OF DENVER CYCLONE SPIN UP OVER DOUGLAS COUNTY WHICH COULD ENHANCE LOW LVL FLOW INTO THE FOOTHILLS THIS AFTN INTO THE EVENING HOURS.
EXPECT A GRADUAL RISE TO LIFR TO IFR CEILINGS THRU 23/12Z AS THE LOWEST LEVEL OF MOISTURE MIXES OUT AS NLY WINDS STREGTHEN FROM AROUND 5 KTS TO 10 TO 15 KTS BY 23/12Z. SOME FREEZING FOG NORTH. AN OVERALL NORTHERLY SFC FLOW WILL BE ENFORCED AS CANADIAN HIGH PRESSURE CONTINUES TO EXERT ITS INFLUENCE ACROSS A LARGE SNOW PACK COVERED AREA TO OUR NORTH. AS INFLUENCES OF UPPER MIDWEST/CANADIAN HIGH PRESSURE BASED SYSTEM WORKS INTO MID STATE.
MOUNTAIN SNOW AND MUCH COOLER CONDITIONS TO THE AREA.
WITH COOLER AND POSSIBLY UNSETTLED WEATHER MOVING BACK INTO THE GREAT BASIN BY THE END OF THE WEEK.
OTHER THAN SPOTTY LIGHT FREEZING DRIZZLE. THE COLD FRONT WILL BE PROGRESSING THROUGH SERN ZONES EARLY TODAY. A PERIOD OF WEAK RIDGING AND SUBSIDENCE WILL FOLLOW FOR MUCH OF THE DAYLIGHT HOURS. THE LOWER SUSQ AND PORTIONS OF SOUTHERN AND CENTRAL MTNS SHOULD CLIMB INTO THE MID/UPPER 30S WITH A FEW LOCATIONS TOPPING 40.
716 AM EST SUN FEB 22 2015 HIGH PRESSURE AND AN UNSEASONABLY COLD AIR MASS WILL BUILD INTO THE AREA THROUGH MONDAY.
Early this morning an elongated mid-level trough extended from west of the Great Lakes region into northern Nevada with a storm system anchored over the central Rockies and western Kansas. In case the low-levels are able to saturate more this morning, have kept slight to low-end chance PoPs in across the far southern part of the forecast area with snow accumulations likely ranging from a dusting to around one-half inch. This cold air advection combined with overcast skies will result in well below-normal temperatures today as highs should only reach into the low/mid 20s.
WITH TROF DIGGING SOUTHEASTWARD ACROSS THE GREAT BASIN AND INTO THE SOUTHERN ROCKIES. SKIES WILL BE MOSTLY SUNNY ACROSS MUCH OF THE AREA AS HIGH PRESSURE BUILDS SOUTHEAST INTO THE DAKOTAS. SOME WARMER AIR WILL BEGIN TO BUILD IN FROM THE WEST LATE TONIGHT. WARMER AIR ALOFT WILL ADVECT ACROSS THE AREA IN EARNEST ON MONDAY.
LIGHT FREEZING RAIN POSSIBLE IF MIN TEMPS FALL BELOW 32 DEGS. CHATTANOOGA AIRPORT, TN 47 31 37 25 / 30 40 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 44 28 33 18 / 20 30 10 10 OAK RIDGE, TN 43 27 32 18 / 20 20 10 10 TRI CITIES AIRPORT, TN 44 26 28 13 / 30 20 10 10 NC.
643 AM EST SUN FEB 22 2015 THE LOW PRESSURE THAT BROUGHT THE SNOW TO THE REGION WILL TRACK WELL OFF THE EAST COAST TODAY AS YET ANOTHER ARCTIC FRONT CROSSES THE REGION THIS EVENING.
UNTIL THE COLD FRONT ARRIVES JUST AFTER MIDNIGHT. WITH THE NEXT COLD FRONT BRIEFLY STALLING TO THE NORTH. THE COLD FRONT WILL PICK UP SPEED RIGHT AROUND SUNSET. A BRISK NORTH WIND WILL ACCOMPANY THE COLD FRONT.
THIS TROUGH IS PROGGED TO CUT OFF A LOW OVER THE DESERT SOUTHWEST TONIGHT INTO MONDAY KEEPING THE AREA UNDER A MOIST AND UNSTABLE SOUTHWEST FLOW. IN THE LOWER VALLEYS SNOW LEVELS WILL BECOME A CONCERN DURING THE AFTERNOONS. THE WARMER TEMPS IN THESE VALLEYS MAY MAY LIMIT SNOW ACCUMULATIONS EVEN IF THE PHASE DOES NOT BECOME LIQUID. BY LATE EVENING PRECIPITATION SHOULD PRETTY MUCH BE ALL SNOW EVEN IN THE LOWEST VALLEYS. THIS PATTERN CONTINUES ON MONDAY AS THE LOW DEVELOPS OVER THE SOUTHWEST. SNOW LEVELS AGAIN COME INTO PLAY MONDAY AFTERNOON IN THE LOWER VALLEYS. MODELS TAKE THE CLOSED LOW SYSTEM FROM SOUTHERN NEVADA TO NORTHEAST ARIZONA MONDAY NIGHT.
THERE MAY BE ENOUGH OF A WARM LAYER TO PARTIALLY MELT THE SNOW AS IT FALLS BEFORE REFREEZING IN THE COLD LAYER BELOW. BUT THERE ARE ALSO SUGGESTIONS THAT WE MAY LOSE MOISTURE IN THE DENDRITIC GROWTH ZONE REGIONS ALOFT AT TIMES THROUGH THIS EVENT SUGGESTING SUPERCOOLED WATER FREEZING IN THE COLD LAYER. ALTHOUGH FREEZING RAIN IS NOT COMPLETELY OUT OF THE QUESTION IN THE SOUTH TODAY.
BY TONIGHT A COLD FRONT WILL BE MOVING INTO THE AREA FROM THE WEST. THE COLD FRONT WILL CONTINUE CROSSING THE AREA FROM THE NORTHWEST TONIGHT AND WILL BE ALONG THE COAST BY 12Z MONDAY MORNING. BROAD TROUGH OVER THE EASTERN HALF OF THE COUNTRY WILL PROMOTE WESTERLY FLOW ALOFT FOR MONDAY. RIDGING INTO THE REGION.
615 AM EST SUN FEB 22 2015 HIGH PRESSURE AND AN UNSEASONABLY COLD AIR MASS WILL BUILD INTO THE AREA THROUGH MONDAY.
610 AM CST Sun Feb 22 2015 An upper level storm system was currently moving southward down the High Plains Region and Rockies. Temperatures are falling this morning behind a cold front that just passed through.
MESO ANAL SHOWS A WEAK AND FAIRLY HARD TO FIND COLD FRONT BISECTING THE FCST AREA FROM NE-SW. WEAK FRONTOGENETIC FORCING UNDER THE TAIL OF A RETREATING JET STREAK MOVING UP INTO NEW ENGLAND IS HELPING SUPPORT SOME LINGERING LIGHT FREEZING RAIN OVER MY FAR SERN COUNTIES. THE COLD FRONT WILL BE PROGRESSING THROUGH SERN ZONES EARLY TODAY. A PERIOD OF WEAK RIDGING AND SUBSIDENCE WILL FOLLOW FOR MUCH OF THE DAYLIGHT HOURS. THE LOWER SUSQ AND PORTIONS OF SOUTHERN AND CENTRAL MTNS SHOULD CLIMB INTO THE MID/UPPER 30S WITH A FEW LOCATIONS TOPPING 40.
504 AM EST SUN FEB 22 2015 WE WILL CONTINUE TO SEE THE POTENTIAL FOR SLICK SPOTS THIS MORNING AS FREEZING TO NEAR FREEZING ROAD TEMPERATURES COUPLED WITH SOME AREAS SEEING NEAR FREEZING AIR TEMPS AND SLUSHY ROADS. OTHERWISE THE AREA OF LOW PRESSURE THAT AFFECTED THE REGION YESTERDAY WILL BE MOSTLY OFF TO THE SE TO START THE DAY. THIS FOG SHOULD SUBSIDE AND WE WILL BE LEFT WITH MOSTLY CLOUDY DAY ACROSS THE REGION AND HIGHS IN THE LOWER TO UPPER 30S. HIGH PRESSURE WILL CONTINUE TO BUILD EAST THROUGH THE PERIOD AND THIS WILL USHER IN SOME COLDER AIR ACROSS THE REGION.
SOME PARTIAL CLEARING NORTH AS UPPER TROUGH SHIFTS SOUTHEAST AND BRINGS MUCH DRIER AIR INTO NORTHERN NEBRASKA. PROVIDING COOLER THAN AVERAGE TEMPERATURES AND A CHANCES FOR LIGHT QPF.
MELTING SNOW/ICE COVER ALONG WITH WET BULBS ABOVE FREEZING ARE PRODUCING AREAS OF DENSE FOG. CHATTANOOGA AIRPORT, TN 47 31 37 25 / 30 40 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 44 28 33 18 / 20 30 10 10 OAK RIDGE, TN 43 27 32 18 / 20 20 10 10 TRI CITIES AIRPORT, TN 44 26 28 13 / 30 20 10 10 NC.
1047 AM EST SUN FEB 22 2015 AN ARCTIC COLD FRONT MOVES THROUGH THE REGION LATE TODAY WITH COLD AIR FOR THE START OF THE WEEK.
619 AM EST SUN FEB 22 2015 AN ARCTIC COLD FRONT MOVES THROUGH THE REGION LATE TODAY WITH COLD AIR FOR THE START OF THE WEEK.
DRIER AND COOLER AIR MASS SETTLES OVER THE AREA TODAY IN WAKE OF EXITING UPPER TROUGH. MONDAY IS DRY AND SUNNY AS WARMER AIR BUILDS IN FROM THE NORTH.
425 AM MST SUN FEB 22 2015 A COLD FRONT WILL STALL JUST SOUTH OF THE UTAH BORDER TODAY.
414 AM CST SUN FEB 22 2015 TODAY & TONIGHT: ARCTIC HIGH SPREADING SE ACROSS THE NORTHERN PLAINS IS TEAMING WITH LOW PRESSURE POSITIONED OVER THE AZ/NM BORDER TO PRODUCE INCREASING ISENTROPIC ASCENT IN 280-295K LAYER OVER GENERALLY THE WESTERN HALVES OF KS AND OK.
WE WILL CONTINUE TO SEE THE POTENTIAL FOR SLICK SPOTS THIS MORNING AS FREEZING TO NEAR FREEZING ROAD TEMPERATURES COUPLED WITH SOME AREAS SEEING NEAR FREEZING AIR TEMPS AND SLUSHY ROADS. OTHERWISE THE AREA OF LOW PRESSURE THAT AFFECTED THE REGION YESTERDAY WILL BE MOSTLY OFF TO THE SE TO START THE DAY. THIS FOG SHOULD SUBSIDE AND WE WILL BE LEFT WITH MOSTLY CLOUDY DAY ACROSS THE REGION AND HIGHS IN THE LOWER TO UPPER 30S. HIGH PRESSURE WILL CONTINUE TO BUILD EAST THROUGH THE PERIOD AND THIS WILL USHER IN SOME COLDER AIR ACROSS THE REGION.
This will likely result in difficult driving conditions particularly for high profile vehicles and the High Wind Watch has been upgraded to a High Wind Warning for this location. Currently have SW flow developing aloft as an upper trough digs south toward the SW ConUS. Precip chances will continue through much of Monday with the highest chances generally NE of the Pecos River. As the colder air advances southward overnight, forecast model soundings continue to support rain changing over to freezing rain and/or sleet for all but the far southern zones by midnight tonight. For northern Lea County, think its possible for a snow/sleet mix rather than freezing rain.
CURRENT READINGS ARE HOVERING NEAR OR SLIGHTLY ABOVE FREEZING ACROSS THE MIDSOUTH. THAT PRECIPITATION MAY FALL AS FREEZING RAIN. THE GREATEST POTENTIAL FOR FREEZING RAIN WILL BE SOUTH OF A LINE FROM TUPELO MISSISSIPPI TO MARIANA ARKANSAS. ALTHOUGH ACCUMULATIONS OF FREEZING RAIN ARE NOT EXPECTED TO BE HIGH. FOR NOW WILL WORD AN ADVISORY WITH UP TO AN INCH OF ICE/SLEET ACCUMULATION AND LESS THAN ONE QUARTER OF AN INCH OF ICE/FREEZING RAIN. HIGHS MONDAY WILL REMAIN BELOW FREEZING ACROSS MOST OF THE MIDSOUTH. WITH HIGHS AS COLD AS THE LOW 20S IN NORTHWEST TENNESSEE.
ISOLATED SHOWERS ARE BEING DETECTED ON THE DISTANT WATERS BEYOND 20 NM SOUTH OF THE LOWER KEYS. TEMPERATURES ARE MOSTLY IN THE LOWER 70S WITH EAST TO SOUTHEAST WINDS OF AROUND 10 MPH. A WESTERN ATLANTIC RIDGE EXTENDS ACROSS NORTHERN FLORIDA AND WELL INTO THE GULF OF MEXICO. A DEEP LAYERED WESTERN ATLANTIC RIDGE LYING ACROSS THE ARCHIPELAGO OF CUBA EARLY THIS MORNING WILL LIFT NORTHWARD. WITH THE WESTERN ATLANTIC RIDGE EXTENDING ACROSS THE NORTH FLORIDA EARLY THIS MORNING DROPPING INTO CENTRAL FLORIDA THIS AFTERNOON AND EVENING. WITH LESS THAN 15 KNOTS NORTH OF THE ISLAND CHAIN DUE TO COOLER WATERS AND A WEAKENING PRESSURE GRADIENT.
COLD FRONT NOW THRU JAS. FIRST OFF EARLY MORNING SFC ANALYSIS SHOWS AN IMPRESSIVE COLD FRONT JUST NORTH OF THE I-10 CORRIDOR.
1013 AM EST SUN FEB 22 2015 HIGH PRESSURE AND AN UNSEASONABLY COLD AIR MASS WILL BUILD INTO THE AREA THROUGH MONDAY.
809 AM EST SUN FEB 22 2015 A COLD FRONT CONTINUES TO NUDGE SOUTH TOWARDS THE LOCAL AREA FROM NORTHERN GA.
631 AM EST SUN FEB 22 2015 MELTING SNOW/ICE COVER ALONG WITH WET BULBS ABOVE FREEZING ARE PRODUCING AREAS OF DENSE FOG. CHATTANOOGA AIRPORT, TN 47 31 37 25 / 30 40 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 44 28 33 18 / 20 30 10 10 OAK RIDGE, TN 43 27 32 18 / 20 20 10 10 TRI CITIES AIRPORT, TN 44 26 28 13 / 30 20 10 10 NC.
SKIES WILL BE CLEARING WITH DIMINISHING WINDS SO THE HIGHS IN THE SINGLE DIGITS TO LOWER TEENS ABOVE ZERO WILL NOT FEEL QUITE SO BAD. SOUTHWESTERLY FLOW WILL INCREASE ON MONDAY BETWEEN THE DEPARTING HIGH AND OUR NEXT APPROACHING COLD FRONT.
EARLY MORNING SURFACE OBSERVATIONS SHOW A COLD FRONT LOCATED JUST NORTH OF A COTULLA TO VICTORIA LINE AS OF 22/09Z. THE COLD FRONT MAY BRIEFLY RETREAT NORTHWARD AS A WARM FRONT THIS AFTERNOON AND THIS WILL YIELD SOME SIGNIFICANT DIFFERENCES IN HIGH TEMPERATURES ACROSS SOUTH CENTRAL TEXAS TODAY. NORTH OF THE COLD FRONT. TEMPERATURES WILL FALL QUICKLY BEHIND THE FRONT WITH THE SURFACE FREEZING LINE EXPECTED TO MOVE INTO THE FAR NORTHERN HILL COUNTRY AROUND MIDNIGHT. THE LATEST ROUND OF GUIDANCE CONTINUES TO TREND COOLER. CONCERNS FOR LIGHT FREEZING RAIN CONTINUE TO INCREASE ON MONDAY AND WE HAVE OPTED TO ISSUE A WINTER WEATHER ADVISORY FOR THE SOUTHERN EDWARDS PLATEAU.
PRIMARY FEATURES AT 500 MB WERE STILL THE STRONG RIDGE THAT EXTENDED FROM THE EASTERN PACIFIC UP INTO NORTHWEST CANADA AND A CLOSED LOW OVER THE SOUTHERN PART OF HUDSON BAY. THE RIDGE WILL WEAKEN THROUGH MONDAY WHILE A NEW CLOSED LOW FORMS OVER NEVADA TODAY/TONIGHT.
TODAY & TONIGHT: ARCTIC HIGH SPREADING SE ACROSS THE NORTHERN PLAINS IS TEAMING WITH LOW PRESSURE POSITIONED OVER THE AZ/NM BORDER TO PRODUCE INCREASING ISENTROPIC ASCENT IN 280-295K LAYER OVER GENERALLY THE WESTERN HALVES OF KS AND OK.
THE MAIN UPPER TROUGH CONTINUES TO DIG INTO THE GREAT LAKES. WITH STRONG ARCTIC HIGH PRESSURE REMAINING OVER THE AREA THROUGHOUT THE DAY. COLD HIGH PRESSURE WILL KEEP TEMPS BELOW ZERO EVEN WITH MOSTLY SUNNY SKIES. WARM AIR ADVECTION WILL CONTINUE AND TEMPS WILL BE VERY MUCH WARMER WITH HIGHS TOPPING OUT IN THE 20S AGAIN.
LOW LEVEL RIDGE AXIS DIRECTLY OVERHEAD EAST CENTRAL FLORIDA THIS MORNING. WEAK SOUTH-SOUTHEAST FLOW UNDER THE RIDGE AND WARM TEMPS WILL ALLOW BOTH EAST AND WEST COAST SEA BREEZES TO DEVELOP AND MOVE INLAND THIS AFTERNOON. WITH SURFACE DEWPOINTS IN THE LOW-MID 60S AND AFTERNOON HIGHS TOPPING OUT IN THE UPPER 70S AND LOW 80S. PREVAILING SOUTHERLY FLOW 5-10KTS OVER THE LOCAL ATLANTIC WITH RIDGE AXIS OVERHEAD.
The 7 am EST regional surface analysis showed a cold front from north GA through southern LA. Vapor imagery and upper air data showed mostly zonal flow over the Gulf Coast states, with a few embedded minor short wave troughs.
High pressure and dry conditions are expected through mid-week, though both overnight lows and daytime highs will start to moderate.
Vsbys should fall also as rain develops today and changes over to freezing rain and sleet tonight. This will likely result in difficult driving conditions particularly for high profile vehicles and the High Wind Watch has been upgraded to a High Wind Warning for this location. Currently have SW flow developing aloft as an upper trough digs south toward the SW ConUS. Precip chances will continue through much of Monday with the highest chances generally NE of the Pecos River. As the colder air advances southward overnight, forecast model soundings continue to support rain changing over to freezing rain and/or sleet for all but the far southern zones by midnight tonight. For northern Lea County, think its possible for a snow/sleet mix rather than freezing rain.