Aikyam-Lab/Synoptic-Bench huggingface dataset:
/ISSUED 438 AM EDT TUE APR 14 2015/ LOOKS LIKE A SMALL BREAK IN THE AFTERNOON CONVECTION FOR SOUTH FLORIDA AS THE HIGH PRESSURE TO THE WEST AND THE UPPER LEVEL RIDGE REMAIN IN PLACE, AND STRENGTHEN EVER SO SLIGHTLY. ALSO, IT LOOKS AS THOUGH WE WILL BE MISSING ANY DECENT SHORT WAVES AT 500MB, WHICH WE HAVE BEEN GETTING OVER THE LAST SEVERAL DAYS, AS THE UPPER LEVEL RIDGE BUILDS. THEN, BY TOMORROW, THE RIDGE WEAKENS SOME AGAIN AND A SMALL SHORT WAVE WILL MOVE OVER THE AREA ONCE AGAIN.
Breezy to windy conditions along with much cooler temperatures will be left in its wake for today.
1112 AM EDT TUE APR 14 2015 HIGH PRESSURE WILL DRIFT INTO THE GREAT LAKES AND PROVIDE THE REGION WITH FAIR WEATHER AND SEASONABLE TEMPERATURES INTO WEDNESDAY.
SO WILL BUCK THE CURRENT CONDITION OF 2100 FT IN FAVOR OF THE LOWER CIGS. SURFACE OBSERVATIONS SHOW A COLD FRONT LOCATED ROUGHLY ALONG A VICTORIA TO LAREDO LINE EARLY THIS MORNING. RADAR TRENDS HAVE SHOWN A DECREASE IN CONVECTION ACROSS OUR REGION AND WITH DRIER AIR MOVING IN BEHIND THE COLD FRONT. WITH AN UPPER LOW TO OUR NORTH AND DECENT LOW-LEVEL MOISTURE. THE UPPER LOW WEAKENS AND LIFTS INTO THE CENTRAL PLAINS ON WEDNESDAY. SOUTHERLY WINDS IN THE LOW-LEVELS RETURN AND MOISTURE WILL QUICKLY INCREASE.
SURFACE RIDGING ACROSS THE CENTRAL FLORIDA PENINSULA OVER THE NEXT 24 HOURS. SURFACE RIDGING OVER THE AREA FOR THE NEXT 24 HOURS.
1100 AM CDT TUE APR 14 2015 WEAK COLD FRONT JUST SOUTH OF I-20. /ISSUED 450 AM CDT TUE APR 14 2015/ WATER VAPOR IMAGERY REVEALS LITTLE MOVEMENT IN THE UPPER LOW ALONG THE RED RIVER OF N TX/SW OK. AS AMPLE LIFT AHEAD OF THE LOW AND A STALLED FRONTAL BOUNDARY CONTINUE TO INITIATE AREAS OF ISOLATED CONVECTION OVER PARTS OF THE REGION THIS MORNING. THIS LOW WILL MIGRATE NEWRD AS THE FRONT SLOWLY RETREATS BACK NORTH. THIS BREAK IN THE RAINFALL WILL BE SHORT-LIVED AS THE NEXT MAJOR UPPER TROF ACROSS THE FOUR CORNERS REGION WILL SEND A SERIES OF DISTURBANCES INTO OUR REGION.
EXPECT SOMEWHAT LESS CONVECTIVE COVERAGE THIS AFTN AS LOW AMPLITUDE RIDGING MOVES OVER THE AREA.
620 AM CDT TUE APR 14 2015 HIGH PRESSURE SPRAWLED N/S ACROSS THE UPPER MISSISSIPPI RIVER VALLEY PROVIDING THE REGION WITH CLEAR SKIES AND LIGHT/CALM WINDS. HIGH PRESSURE WILL REMAIN IN CONTROL TODAY THROUGH TONIGHT FOR QUIET/MOSTLY CLEAR CONDITIONS. LOOK FOR HIGHS TODAY IN THE 60S AND LOWS TONIGHT BOTTOMING OUT IN THE UPPER 30S TO THE LOWER 40S.
1034 AM EDT TUE APR 14 2015 HIGH PRESSURE WILL SLOWLY SHIFT ACROSS THE GREAT LAKES THROUGH MID-WEEK.
1158 AM CDT TUE APR 14 2015 HIGH PRESSURE SPRAWLED N/S ACROSS THE UPPER MISSISSIPPI RIVER VALLEY PROVIDING THE REGION WITH CLEAR SKIES AND LIGHT/CALM WINDS. HIGH PRESSURE WILL REMAIN IN CONTROL TODAY THROUGH TONIGHT FOR QUIET/MOSTLY CLEAR CONDITIONS. LOOK FOR HIGHS TODAY IN THE 60S AND LOWS TONIGHT BOTTOMING OUT IN THE UPPER 30S TO THE LOWER 40S.
BREEZY AND COOL WEATHER TODAY BEHIND LAST NIGHTS COLD FRONTAL PASSAGE.
940 AM CDT TUE APR 14 2015 AREA OF HIGH PRESSURE WILL STAY IN CONTROL OVER THE REGION TODAY. DEW POINTS LOOK TO DROP INTO THE LOWER 20S AND UPPER TEENS AS THE BOUNDARY LAYER LOOKS TO MIX UP TO NEAR THE 800MB LEVEL ACCORDING TO RAP MODEL BUFKIT SOUNDINGS. TEMPS WILL BE COOLER ALONG THE LAKE SHORE THAN FURTHER INLAND DUE TO THE SEA BREEZE. DEEP RIDGING WILL BRING QUIET WEATHER ACROSS THE AREA. SO MUCH COOLER NEAR THE LAKE VS INLAND AREAS. THOUGH AS THE RIDGE SLIDES EAST OF US BY EVENING.
THIS AHEAD OF STALLED NE-SW ORIENTED COLD FRONT EXTENDING FROM NORTHEAST LOUISIANA TO JUST INLAND OF THE TEXAS COAST. AN UPPER LEVEL LOW BACK TO THE WEST AND A WEAK FRONT THIS MORNING IS THE FOCUSING MECHANISM FOR THE STORM DEVELOPMENT.
A TROUGH OF LOW PRESSURE WILL MOVE THROUGH THE CENTRAL CALIFORNIA INTERIOR TODAY WITH WINDY AND COOLER WEATHER. HIGH PRESSURE WILL BRING A RETURN OF DRY AND WARMER WEATHER FOR THE LATTER HALF OF THE WEEK. SATELLITE IMAGERY AND SURFACE OBSERVATIONS SHOW THE TROUGH OF LOW PRESSURE NOW MOVING INTO SOUTHERN CALIFORNIA. THE TROUGH IS PROGGED TO RACE QUICKLY EAST TODAY AND THEN FORM A CLOSED LOW OVER THE ROCKIES. THIS WILL OCCUR AS A RIDGE OF HIGH PRESSURE AMPLIFIES OVER THE WEST COAST.
THE UPPER LOW THAT WAS CENTERED JUST SOUTH OF THE FOUR CORNERS REGION OF THE DESERT SOUTHWEST PART OF THE U. DESPITE THE REDUCTION OF THE MAIN PRECIPITATION SHIELD EAST OF THE AREA BY NOON, THE COMBINATION OF A WEAKENING DEFORMATION ZONE ALOFT AND APPROACHING POSITIVE DIFFERENTIAL ADVECTION AHEAD OF THE LOW AS IT MOVES INTO EASTERN KANSAS/WESTERN MISSOURI.
928 AM EDT TUE APR 14 2015 A COLD FRONT WILL PUSH OFFSHORE EARLY TODAY AND WILL BE FOLLOWED BY A SECONDARY COLD FRONT TONIGHT.
COLD FRONT WILL BEGIN TO MOVE ACROSS THE AREA THIS AFTERNOON.
CHATTANOOGA AIRPORT, TN 76 61 70 57 / 50 60 70 60 KNOXVILLE MCGHEE TYSON AIRPORT, TN 73 57 69 55 / 60 50 60 60 OAK RIDGE, TN 72 60 69 55 / 60 50 60 60 TRI CITIES AIRPORT, TN 71 54 65 49 / 90 50 50 70.
A CUT OFF LOW IN THE LOWER PLAINS IS PROVIDING UPPER LEVEL SOUTHWESTERLY FLOW INTO THE REGION WHERE WV SATELLITE SHOWS A TRAIL OF MOISTURE FROM MS/AL. SLIGHTLY COOLER TEMPS AND LOWER DEWPOINTS CAN BE FOUND BEHIND THE FRONT WITH THE NORTHWESTERLY WINDS. A COLD FRONT WILL STALL ACROSS SOUTHERN TN AND NWRN AL LATE THIS AFTERNOON AND TONIGHT.
621 AM CDT TUE APR 14 2015 HIGH PRESSURE IS RIDGE ACROSS THE STATE THIS MORNING WITH GENERALLY LIGHT WINDS AND SOME HIGH THIN CIRRUS PASSING THROUGH. THE AREA OF HIGH PRESSURE WILL SHIFT SLOWLY EAST/NORTHEAST TODAY. AN UPPER LEVEL LOW PRESSURE OVER NORTHERN TEXAS EARLY THIS MORNING WILL LIFT NORTHEAST INTO KANSAS BY LATE AFTERNOON.
913 AM EDT TUE APR 14 2015 HIGH PRESSURE IN THE GREAT LAKES AND LOW PRESSURE IN THE TENNESSEE VALLEY WILL HAVE A COOL AIRMASS OVER THE OHIO VALLEY WITH RAIN ENDING OVER THE SOUTHERN OHIO VALLEY THIS MORNING. THE HIGH WILL CONTINUE TO PUSH DRIER AND SOMEWHAT COOL AIR TO THE REGION THROUGH WEDNESDAY.
955 AM EDT TUE APR 14 2015 A COLD FRONT WILL MOVE ACROSS THE AREA THIS MORNING.
A LOW PRESSURE SYSTEM IN SOUTHWESTERN OKLAHOMA WILL MAINTAIN SOUTHWESTERLY 850MB FLOW OVER THE COOL POSTFRONTAL BOUNDARY LAYER. THIS WILL RESULT IN DRIER AND COOL CONDITIONS TODAY WITH AFTERNOON HIGHS RANGING FROM THE LOWER 60S ALONG THE RED RIVER TO THE LOWER AND MIDDLE 70S IN THE SOUTH.
A COLD LOW PRESSURE SYSTEM APPROACHING ARIZONA FROM THE NORTH WILL BRING STRONG GUSTY WINDS TODAY. COLDER UNSETTLED AIR WILL MOVE IN WITH THE LOW AND CHANCES FOR A FEW SHOWERS ARE POSSIBLE.
935 AM PDT TUE APR 14 2015 A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE MOUNTAINS AND DESERTS TODAY.
1110 AM EDT TUE APR 14 2015 HIGH PRESSURE WILL SETTLE OVER THE REGION TODAY AND CONFINE SHOWERS TO AREAS SOUTH OF INTERSTATE 70. LITTLE CHANGE HAS BEEN MADE TO THE NEAR TERM FORECAST AS BUILDING HIGH PRESSURE IS DRYING OUT THE LOW LEVELS. AND PRECLUDING ANY MEASURABLE PRECIPITATION FOR BEING REPORTED BEYOND THE WV/MD RIDGES.
A DRY COLD FRONT PUSHES THROUGH SOUTHEAST CALIFORNIA AND ARIZONA TUESDAY NIGHT AND WEDNESDAY. THE FRONTAL PASSAGE WILL ALSO LEAD TO MUCH COOLER TEMPERATURES.
731 AM EDT TUE APR 14 2015 HIGH PRESSURE WILL BUILD EAST INTO THE AREA TODAY FOLLOWED BY ANOTHER HIGH PRESSURE THAT WILL MOVE EAST INTO THE CENTRAL GREAT LAKES REGION BY TONIGHT.
LATEST SURFACE ANALYSIS SHOWS A WEAKENING COLD FRONT SAGGING INTO WEST TN WITH AN UPPER DISTURBANCE PRODUCING A WAVE ALONG THE FRONT. STABLE SURFACE WEDGE OF HIGH PRESSURE BEGINS TO BUILD IN FROM THE EAST BY MID-LATE WEDNESDAY AFTERNOON. SHOULD SEE SLIGHTLY COOLER HIGHS ON WEDNESDAY WITH PLENTY OF CLOUDS.
609 AM CDT TUE APR 14 2015 FOR 12Z TAFS /ISSUED 310 AM CDT TUE APR 14 2015/ WATER VAPOR ANALYSIS AS OF 08Z IS SHOWING A BIT OF A DRY SLOT PUSHING INTO MISSISSIPPI AND NW ALABAMA AND AN UPPER LOW OPENING UP OVER TEXAS. WAVES OF LOW PRESSURE ARE FORECAST TO DEVELOP AND RIDE ALONG THIS FRONT BRINGING ADDITIONAL RAINFALL FOR TUESDAY AFTERNOON THROUGH WEDNESDAY.
424 AM PDT TUE APR 14 2015 A cold front will produce showers and windy conditions today. Drier and warmer weather is expected for the rest of the work week.
613 AM CDT TUE APR 14 2015 A WEAK RIDGE OF HIGH PRESSURE WILL MOVE EAST OF THE AREA WITH STRONG SOUTHERLY WINDS EXPECTED TO DEVELOP TODAY. THIS SEEMS BEST GIVEN THE LOW POPS.
WITH THE HIGHEST POPS AND STORM COVERAGE EXPECTED ALONG AND TO THE EAST OF THE I-75 CORRIDOR DURING THE MID AND LATE AFTERNOON HOURS.
TONIGHT MORE WIDESPREAD CLOUD COVER WILL RETURN ALONG WITH HIGHER RAIN CHANCES AS THE COLD FRONT PASSES OUR AREA.
A WARM FRONT HAS FORMED UP ASSOCIATED WITH A LOW OFF CORPUS CHRISTI. THIS AHEAD OF STALLED NE-SW ORIENTED COLD FRONT EXTENDING FROM NORTHEAST LOUISIANA TO JUST INLAND OF THE TEXAS COAST. AN UPPER LEVEL LOW BACK TO THE WEST AND A WEAK FRONT THIS MORNING IS THE FOCUSING MECHANISM FOR THE STORM DEVELOPMENT.
733 AM EDT TUE APR 14 2015 HIGH PRESSURE WILL SETTLE OVER THE REGION TODAY AND CONFINE SHOWERS TO AREAS SOUTH OF INTERSTATE 70. NO APPRECIABLE CHANGES WERE NEEDED FOR THE DAWN UPDATE AS HIGH PRESSURE WILL KEEP MOST OF THE AREA DRY FOR THE NEAR TERM.
1043 AM EDT TUE APR 14 2015 1026 MB HIGH PRESSURE STRETCHED FROM THE EASTERN PLAINS INTO THE WESTERN GREAT LAKES. HEIGHT RISES AND INCREASING HIGH PRESSURE SLOWLY WORK INTO THE REGION. THE CLEAR SKIES WILL PERSIST WITH HIGH PRESSURE OVERHEAD. HIGH PRESSURE AT THE SFC AND AT 500 MB WILL KEEP THE REGION DRY THROUGH THE DAY AND NIGHT.
A CUT OFF LOW IN THE LOWER PLAINS IS PROVIDING UPPER LEVEL SOUTHWESTERLY FLOW INTO THE REGION WHERE WV SATELLITE SHOWS A TRAIL OF MOISTURE FROM MS/AL. SLIGHTLY COOLER TEMPS AND LOWER DEWPOINTS CAN BE FOUND BEHIND THE FRONT WITH THE NORTHWESTERLY WINDS.
A WESTERN ATLANTIC RIDGE REMAINS DRAPED ACROSS CENTRAL FLORIDA AND WELL INTO THE GULF OF MEXICO. WITH THE WESTERN ATLANTIC RIDGE HOLDING ACROSS THE FLORIDA PENINSULA AND HEATING ON THE SURROUNDING LARGE LAND MASSES.
841 AM EST THU JAN 22 2015 HIGH PRESSURE WILL LINGER ACROSS NORTHERN NEW ENGLAND TODAY AND TONIGHT AS A LOW PRESSURE SYSTEM PASSES WELL TO OUR SOUTH. A WEAK WARM FRONT WILL CROSS THE REGION ON FRIDAY. LOW PRESSURE LOOKS TO DEVELOP OFF THE MID ATLANTIC COAST FRIDAY NIGHT AND RACE NORTHEASTWARD.
955 AM EST THU JAN 22 2015 HIGH PRESSURE WILL BUILD IN THROUGH FRIDAY BEHIND AN EXITING COLD FRONT. SEVERAL AREAS OF LOW PRESSURE WILL BRING UNSETTLED WEATHER OVER THE WEEKEND. UPDATE MADE TO PROLONG MENTION OF SNOW SHOWERS IN THE RIDGES AND TO ADD THE MENTION OF SNOW FURTHER NORTH AS SOME RADAR RETURNS ARE SHOWING UP DOWNWIND OF LAKE ERIE.
959 AM EST THU JAN 22 2015 HIGH PRESSURE WILL MOVE ACROSS THE OHIO VALLEY LOWER GREAT LAKES TODAY THEN MOVE OFF THE MID ATLANTIC COAST FRIDAY.
626 AM EST THU JAN 22 2015 HIGH PRESSURE WILL MOVE ACROSS THE OHIO VALLEY LOWER GREAT LAKES TODAY THEN MOVE OFF THE MID ATLANTIC COAST FRIDAY.
SLIGHTLY WARMER TEMPERATURES ARE LIKELY FRIDAY AS A COOL FRONT DROPS THROUGH THE REGION AND ALLOWS STRONGER MIXING TO OCCUR.
827 AM EST THU JAN 22 2015 A HIGH PRESSURE SYSTEM WILL BRING IN SLIGHTLY COOLER AND DRY CONDITIONS THROUGH THE REST OF THE WEEK. BEFORE AN APPROACHING LOW PRESSURE SYSTEM FROM THE SOUTH MAY BRING A WINTRY MIX TO AREAS ALONG AND SOUTH OF THE OHIO RIVER BY FRIDAY EVENING. PATCHY DRIZZLE/FREEZING DRIZZLE HAS JUST ABOUT ENDED THIS MORNING. HIGHS WILL RANGE FROM THE LOWER 30S NORTH TO THE UPPER 30S FAR SOUTH. HAVE GENERALLY GONE WITH A MIX BETWEEN THE ECMWF AND GFS IN TERMS OF PLACEMENT/TRACK OF THE LOW.
630 AM EST THU JAN 22 2015 AVIATION A RIDGE OF HIGH PRESSURE WILL BUILD INTO THE LOWER GREAT LAKES REGION AND BRING TRANQUIL WEATHER TODAY THROUGH FRIDAY.
THE SOUTHWEST WINDS WILL ALSO BRING A WARMER AIR MASS BACK INTO THE REGION. SFC TEMPS IN THE EVENING MAY ACTUALLY STILL BE ABOVE FREEZING BUT AS THE BOUNDARY LAYER COOLS OFF SOME FREEZING RAIN IS DEFINITELY POSSIBLE.
MODELS SHOW A WEAK SFC COLD FRONT SLIPPING SWRD ACRS NERN COLORADO FRIDAY MORNING. WHEREAS MODELS SHOW POCKETS OF VERY LIGHT QPF/SNOW ACCUM IN THE NORTHERN MTNS LATE FRIDAY AFTERNOON AND EVENING AS THE S/W TROUGH PASSES BY. EVEN WITH THE PASSAGE OF A COLD FRONT AND ALL OF THE CLOUD COVER.
Temperatures are holding steady in the lower to middle 30s beneath the cloud deck, but have dipped into the upper 20s where less cloud cover prevails. Thanks to the clouds and a very light N/NW wind, temps will be cooler than in previous days. Thanks to high pressure, mostly sunny and mild conditions will prevail on Friday, with high temps rebounding into the 40s.
THE HIGHER THE TOTALS. THE REASON IS SURFACE TEMPERATURES IN MANY AREAS ARE EITHER RIGHT AT OR A DEGREE OR TWO ABOVE FREEZING. MID LEVEL RIDGING WILL MOVE INTO THE AREA. ALLOWING FOR WARMER TEMPERATURES.
SURFACE RIDGING WILL PASS BY TO OUR NORTH TODAY AND TONIGHT AND PROVIDE A CONTINUATION OF FAIR WEATHER. A MID/UPPER LEVEL TROUGH OVER NEW MEXICO EARLY THIS MORNING WILL SHIFT EASTWARD. ASSOCIATED LOW PRESSURE OVER THE WESTERN GULF OF MEXICO WILL MOVE ENE AND REACH THE FLORIDA PANHANDLE BY LATE FRIDAY.
557 AM EST THU JAN 22 2015 HIGH PRESSURE WILL MOVE ACROSS THE OHIO VALLEY LOWER GREAT LAKES TODAY THEN MOVE OFF THE MID ATLANTIC COAST FRIDAY.
MOISTURE HAS BEGUN TO MOVE INTO THE REGION AHEAD OF A DEVELOPING LOW PRESSURE SYSTEM WHICH IS LOCATED OVER SOUTH TEXAS. AS THE LOW MOVES EAST TODAY SOME LIGHT RAIN IS EXPECTED TO SPREAD INTO THE FORECAST AREA. AS TEMPERATURES TURN COLDER AND GET CLOSE TO FREEZING LATE TONIGHT A MIX OF RAIN AND SNOW WILL BE POSSIBLE. BY FRIDAY NIGHT THE LOW WILL BE MOVING TOWARD THE CAROLINA COAST WITH PRECIPITATION ENDING FROM WEST TO EAST.
All eyes to the west as the upper level trough axis itself approaches. With temperatures very near freezing. Precipitation will becoming to an end Friday morning, as the axis of the upper trough moves east. Clearing otherwise in subsidence behind the upper trough.
SEASONAL TEMPERATURES ARE EXPECTED THROUGH FRIDAY THEN HIGH PRESSURE WILL RESULT IN WELL ABOVE NORMAL TEMPERATURES OVER THE WEEKEND.
935 AM EST THU JAN 22 2015 LOW PRESSURE WILL TRACK SOUTH AND EAST OF THE GULF OF MAINE TODAY. HIGH PRESSURE WILL BUILD ACROSS THE STATE LATER TONIGHT INTO FRIDAY.
UPPER AIR ANALYSIS LAST EVENING SHOWED ZONAL FLOW ACROSS MOST OF THE SOUTHERN PART OF THE COUNTRY WITH A TROUGH OVER THE WEST EXTENDING FROM THE DAKOTAS TO THE BAJA PENINSULA. DURING THIS PERIOD THE WESTERN UPPER TROUGH WILL SHARPEN AND MOVE THROUGH THE SOUTHWEST AND ACROSS TEXAS. WITH THE SURFACE BOUNDARY AND APPROACHING UPPER TROUGH SHOWERS WILL CONTINUE THROUGH THE DAY TODAY. AS THE UPPER TROUGH MOVES ACROSS TONIGHT AND FRIDAY THERE WILL CONTINUE TO ISOLATED TO SCATTERED SHOWERS. TEMPERATURES OVER THE NORTH CENTRAL REGION WILL FALL TO FREEZING FOR A FEW HOURS FRIDAY MORNING. MODEL SOUNDINGS SHOW DEEPER ATMOSPHERE ALSO MOSTLY BELOW FREEZING. WITH PREVIOUS RAIN AND FREEZING SURFACE TEMPERATURES FOR ONLY A COUPLE OF HOURS NOT EXPECTING ANY ACCUMULATION OR IMPACTS.
COLD FRONT TIMING. WITH COLD FRONT APPROACHING THE WESTERN ZONES BY 12Z. SOME MAX TEMPS ARE COOLER THAN CURRENT TEMPERATURES IN WEST/NORTHWEST. THIS GOES ALONG WITH VERY HIGH POPS AS COLD FRONT APPROACHES AND PWAT VALUES EXPECTED AS HIGH AS 1. UPPER LEVEL TROUGH LINGERS TONIGHT AND WILL CONTINUE THE RAIN CHANCES BEHIND THE FRONT. TEMPERATURES FRIDAY WILL BE MUCH COOLER WITH HIGHS ONLY IN THE LOWER TO MID 50S.
333 AM MST THU JAN 22 2015 SATELLITE WATER VAPOR LOOP SHOWED A CLOSED LOW OVER THE NW CORNER OF NM AT 09Z WITH MOISTURE WRAPPING COUNTERCLOCKWISE BACK OVER THE SWRN SAN JUAN MTNS AND SOUTHERN FOOTHILLS. THE UPPER LOW WILL BE DROPPING SOUTHWARD ACROSS WRN NM TODAY WITH A SUBSEQUENT DIMINISHING OF SNOW AND CLOUDS ACROSS SWRN CO EARLY THIS MORNING. WIND OVER SE UT/SW CO WILL WEAKEN THIS MORNING AS THE HIGH MOVES IN AND THE GRADIENT LESSENS. A SPLITTING PACIFIC TROUGH CURRENTLY APPROACHING THE WEST COAST WILL FIGHT ITS WAY THROUGH THE UPPER RIDGE TONIGHT. HIGH PRESSURE CONTINUES TO BUILD FRIDAY NIGHT AS A CLOSED LOW SETS UP OFF THE BAJA COAST CAUSING A REX BLOCK TO FORM. THESE WAVES WILL HIT THE APEX OF THE RIDGE AND THEN DROP SOUTHEASTWARD TOWARDS US THROUGH THE WEEKEND.
635 AM EST THU JAN 22 2015 A WEAK TROUGH OF LOW PRESSURE WILL MOVE ACROSS EASTERN CANADA AND THE NORTHEAST UNITED STATES TODAY. HIGH PRESSURE RETURNS FOR FRIDAY WITH A DEVELOPING SOUTHWEST FLOW.
243 AM PST THU JAN 22 2015 HIGH PRESSURE OVER THE PACIFIC WILL EXPAND INTO THE WEST COAST THIS WEEKEND.
WINDS BECOME MORE OUT OF THE NORTH TONIGHT AS THE LOW EDGES OFF TO THE EAST AND A COLD FRONT MOVES OFF THE COAST. /ISSUED 353 AM CST THU JAN 22 2015/ WIDESPREAD RAINFALL IS ONGOING ACROSS MUCH OF THE STATE THIS MORNING AS SOUTHWESTERLY FLOW ALOFT IS CAUSING OVERRUNNING ACROSS THE COOLER AIRMASS IN PLACE BEHIND THE FRONT THAT MOVED TO THE COAST YESTERDAY. RAINFALL COVERAGE WILL INCREASE ACROSS THE REGION LATER THIS MORNING WITH THE APPROACH OF A LARGE UPPER LEVEL TROUGH AND THE DEVELOPMENT OF A COASTAL TROUGH AHEAD OF IT. BULK OF THE RAIN WILL EXIT TO THE EAST LATE THIS EVENING BUT SCATTERED SHOWERS WILL LINGER ACROSS THE REGION THROUGH FRIDAY BEFORE THE TROUGH AXIS MOVES OFF TO OUR EAST.
WILL HAVE DECENT WARM ADVECTION HELPING TO KEEP MOST AREAS ABOVE FREEZING AND BOTH THE NAM AND GFS BUFR SOUNDINGS KEEP TEMPERATURES TONIGHT ABOVE FREEZING AT BRASSTOWN BALD. ENDED UP WITH SOME TEMPERATURES IN THE MOUNTAINS TONIGHT IN THE MID 30S TO JUST AT FREEZING AND THUS MENTIONED RAIN/SLEET/SNOW MIX IN THE GRIDS BUT NOT EXPECTING MUCH IN TERMS OF ACCUMULATION. WITH THE POTENTIAL OF TEMPERATURES NEAR FREEZING TONIGHT IN PARTS OF THE NE GEORGIA MOUNTAINS. TODAY WILL BE THE LAST DAY FOR THE WARMER TEMPERATURES. ALTHOUGH IT WILL BE 5-10 DEGREES COOLER THAN YESTERDAY. TEMPERATURES ON FRIDAY WILL BE VERY LIMITED BY THE CLOUDS AND PRECIPITATION WITH HIGHS IN SOME AREAS ONLY A FEW DEGREES ABOVE THE LOW FRIDAY MORNING. VERY SHARP UPPER TROUGH AXIS TO MOVE INTO NRN GA 12Z SAT. UPPER TROUGH ALMOST CUTOFF BUT NOT QUITE.
628 AM EST THU JAN 22 2015 WEAK RIDGE OF HIGH PRESSURE WILL BE ACROSS THE FORECAST AREA THROUGH TODAY AS LOW PRESSURE DEVELOPS OVER THE WESTERN GULF WATERS. INCREASING MOISTURE WILL RETURN TO THE AREA TONIGHT AS LOW PRESSURE MOVES INTO THE CENTRAL GULF COAST WITH SHOWERS MOVING INTO THE SOUTHERN MIDLANDS AND CSRA BY DAYBREAK FRIDAY.
1028 AM EST THU JAN 22 2015 A WEAK TROUGH OF LOW PRESSURE WILL MOVE ACROSS EASTERN CANADA AND THE NORTHEAST UNITED STATES TODAY. HIGH PRESSURE RETURNS FOR FRIDAY WITH A DEVELOPING SOUTHWEST FLOW.
PARTIAL CLEARING WAS NOTED NEAR THE RIDGE AXIS IN MN. AN UPPER TROF. RRQ OF AN UPPER LEVEL JET STREAK AND WEAK COLD FRONT WILL BRING A CHANCE OF PCPN TO THE REGION ON FRIDAY. BUT GENERALLY AGREE THAT THE HIGHEST QPF WILL OCCUR OVER NC/NE WI. WHICH IS MOST PRONOUNCED AND A BIT WARMER ON THE NAM MODEL. AS LOW-LEVEL WET BULB TEMPS ARE EXPECTED TO REMAIN BLO FREEZING.
THROUGHOUT THE DAY TODAY LOW CLOUDS WILL MEANDER ACROSS THE REGION AS THE LOW LEVEL MOISTURE REMAINS TRAPPED BENEATH A STOUT INVERSION. BUT THE CONCERN IS FREEZING DRIZZLE/SLEET GIVEN THE WARM LAYER ALOFT AND SUB- FREEZING SURFACE TEMPS. FIRST CONCERN WILL BE FRIDAY AS A COLD FRONT DROPS THROUGH THE UPPER MIDWEST. WITH THERMAL RIDGING JUST ALOFT MAKING FOR A LESS THAN CLEAR CUT PTYPE SCENARIO. FORECAST SOUNDINGS ALSO SHOW A FAIRLY SIZABLE SUBFREEZING LAYER NEAR THE SURFACE. DEEPEST SUBFREEZING LAYER AND THUS HIGHEST CHANCE FOR SLEET WOULD BE ACROSS FAR EASTERN MN AND WESTERN WI. THAT LEAVES A RAIN AND/OR FREEZING RAIN SET UP DEPENDING ON SURFACE TEMPS FURTHER WEST INTO MN.
HIGH PRESSURE ALOFT WILL EXPAND EAST ACROSS THE WESTERN STATES THROUGH THE LATTER HALF OF THE WEEK.
HIGH PRESSURE OVER THE REGION WILL MAINTAIN DRY WEATHER CONDITIONS THROUGH THE WEEKEND. CONSIDERABLE MID AND HIGH LAYER CLOUDS WITH A MID LEVEL TROUGH HAS BEEN MOVING ACROSS THE REGION OVERNIGHT. THE TROUGH AND HIGH LEVEL CLOUDS WILL QUICKLY EXIT TO THE SOUTHEAST THIS MORNING. A RIDGE WILL SPRING BACK OFFSHORE THIS AFTERNOON AND THEN START TO BUILD OVER NORTHERN CALIFORNIA TONIGHT INTO FRIDAY. SOME HIGH LAYER CLOUDS ASSOCIATED WITH ANOTHER IMPRESSIVE LOOKING SYSTEM WEST OF 140W WILL SPILL OVER THE RIDGE FROM TIME TO TIME TONIGHT INTO FRIDAY.
HIGH TEMPERATURES TODAY WILL BE 5 TO 10 DEGREES WARMER THAN YESTERDAY.
629 AM EST THU JAN 22 2015 A RIDGE OF HIGH PRESSURE WILL BUILD INTO THE OHIO VALLEY TODAY AND THEN MOVE INTO THE MID ATLANTIC STATES FRIDAY.
HIGH PRESSURE RIDGE TO THE NORTH WILL PRODUCE A GRADUAL VEERING/ONSHORE WIND FLOW. THE LOW LEVEL FLOW WILL BE INCREASING AS LOW PRESSURE ADVANCES FROM THE WESTERN GULF. DEVELOPING GULF LOW CONTINUES TO SLIDE EASTWARDS LIFTING A DIFFUSE WARM FRONT THROUGH THE REGION OVERNIGHT. ACTIVITY WILL LIFT NORTH WITH WARM FRONT OUT OF THE REGION TOWARDS DAYBREAK. ONSHORE FLOW WILL KEEP OVERNIGHT LOWS MILD IN THE LOW-MID 60S. HIGHEST HELICITIES WILL STAY WELL TO OUR NORTH ALONG THE WARM FRONT ON FRIDAY.
THE MAIN FORECAST ISSUES IN THE SHORT TERM PERIOD ARE POTENTIAL FOR A SLICK MORNING COMMUTE WITH FLURRIES/FREEZING DRIZZLE. LINGERING MOISTURE FREEZING ON ROADS. AS WELL AS OVERNIGHT FLURRIES AND FREEZING DRIZZLE. FLURRIES/FREEZING DRIZZLE EXPECTED TO CONTINUE MAINLY EAST HALF OF FORECAST AREA THROUGH AT LEAST MID MORNING. SLIGHTLY WARMER IN EASTERN IOWA WITH A BIT STRONGER SOUTHWEST FLOW.
A WEAK WARM FRONT WILL SPREAD LIGHT RAIN TO WESTERN WASHINGTON TODAY. A STRONGER WARM FRONT WILL BRING MORE WET WEATHER FRIDAY AND FRIDAY NIGHT.
ALL OF THIS PRECIP WAS IN RESPONSE TO A POSITIVELY TILTED LONGWAVE TROF LOCATED OVER NEW MEXICO. TEMP PROFILES CONTINUE TO SHOW THE FREEZING LINE RANGING IN THE 2-3KFT RANGE AGL WHICH COULD ALLOW FOR SOME SNOW TO MIX IN WITH THE RAIN SHOWERS. COOLER SURFACE TEMPS TONIGHT WILL ALLOW FOR ANY PRECIP TO BE A RAIN SNOW MIX. ESPECIALLY WITHIN THE HIGHER TERRAIN LOCATIONS OF PUSHMATAHA AND LE FLORE COUNTIES. LOWS ACROSS THE CWA ARE FORECAST TO RANGE FROM THE MID 20S NORTH TO THE LOW/MID 30S SOUTH. PRECIP CHANCES BEGIN TO TAPER OFF AND EXIT THE REGION DURING THE DAY FRIDAY AS THE UPPER LEVEL LOW FINALLY PUSHES OFF TOWARD THE GULF COAST STATES.
MODERATE THREAT OF VALLEY FREEZING RAIN FOR NORTHWEST MONTANA. Stable conditions under this large scale high pressure system are expected through much of today. A weak weather systems will move through this ridge.
A RIDGE BEGINS REBUILDING ALONG THE COAST TONIGHT INTO FRIDAY. THE RIDGE CONTINUES TO AMPLIFY OVER US THROUGH THE WEEKEND WHICH WILL PUSH ANY THREAT FOR RAIN WELL NORTH OF US AND BRING IN VERY WARM AIR ALOFT.
UPPER RIDGE OVER THE ROCKIES TODAY PROTECTING OUR REGION FROM ANY SIGNIFICANT WEATHER SYSTEMS. WE WILL SEE A COUPLE OF SHORT WAVES ROUND THE RIDGE AND TRACK SOUTHEAST ACROSS OUR FORECAST AREA. SO WE HAVE CONTINUED TO KEEP POPS ON THE LOW SIDE.
659 AM EST THU JAN 22 2015 HIGH PRESSURE WILL LINGER ACROSS NORTHERN NEW ENGLAND TODAY AND TONIGHT AS A LOW PRESSURE SYSTEM PASSES WELL TO OUR SOUTH. A WEAK WARM FRONT WILL CROSS THE REGION ON FRIDAY.
BUT WITH LITTLE TO NO ACCUMULATIONS IN MOST AREAS GIVEN ABOVE FREEZING TEMPERATURES. MOISTURE WILL ERODE FROM THE NORTH SURROUNDING HIGH PRESSURE.
SATELLITE WATER VAPOR LOOP SHOWED A CLOSED LOW OVER THE NW CORNER OF NM AT 09Z WITH MOISTURE WRAPPING COUNTERCLOCKWISE BACK OVER THE SWRN SAN JUAN MTNS AND SOUTHERN FOOTHILLS. THE UPPER LOW WILL BE DROPPING SOUTHWARD ACROSS WRN NM TODAY WITH A SUBSEQUENT DIMINISHING OF SNOW AND CLOUDS ACROSS SWRN CO EARLY THIS MORNING. WIND OVER SE UT/SW CO WILL WEAKEN THIS MORNING AS THE HIGH MOVES IN AND THE GRADIENT LESSENS. A SPLITTING PACIFIC TROUGH CURRENTLY APPROACHING THE WEST COAST WILL FIGHT ITS WAY THROUGH THE UPPER RIDGE TONIGHT. HIGH PRESSURE CONTINUES TO BUILD FRIDAY NIGHT AS A CLOSED LOW SETS UP OFF THE BAJA COAST CAUSING A REX BLOCK TO FORM. THESE WAVES WILL HIT THE APEX OF THE RIDGE AND THEN DROP SOUTHEASTWARD TOWARDS US THROUGH THE WEEKEND.
1031 AM EST THU JAN 22 2015 HIGH PRESSURE BUILDS IN LATE TODAY.
644 AM EST THU JAN 22 2015 A WEAK TROUGH OF LOW PRESSURE WILL MOVE ACROSS EASTERN CANADA AND THE NORTHEAST UNITED STATES TODAY. HIGH PRESSURE RETURNS FOR FRIDAY WITH A DEVELOPING SOUTHWEST FLOW.
611 AM EST THU JAN 22 2015 HIGH PRESSURE WILL BUILD IN THROUGH FRIDAY BEHIND AN EXITING COLD FRONT. SEVERAL AREAS OF LOW PRESSURE WILL BRING UNSETTLED WEATHER OVER THE WEEKEND. WITH LLVL MOISTURE IN PLACE SOME FLURRIES OR PTCHY FRZG DRIZZLE IS PSBL THIS MRNG MAINLY IN THE RIDGES AND S OF PIT AS MUCH OF THE MOISTURE IS BLO THE SNW GROWTH RGN.