Aikyam-Lab/Synoptic-Bench huggingface dataset:
757 PM EDT FRI APR 3 2015 A STRONG COLD FRONT OVER THE OHIO VALLEY WILL CROSS THE APPALACHIANS TONIGHT. HIGH PRESSURE WILL RETURN WITH DRY WEATHER FOR THE LATER HALF OF THE WEEKEND.
SHOWERS WILL CONTINUE THROUGH SATURDAY OVER THE MOUNTAINS OF CENTRAL AND SOUTHWEST IDAHO WITH PASSAGE OF A WEAK COLD FRONT.
ATLANTIC LOW LEVEL HIGH PRESSURE RIDGE WITH AXIS ACROSS SOUTH CENTRAL FLORIDA WILL CONTINUE TO DRIFT EASTWARD THROUGH THE WEEKEND AHEAD OF A WEAK COLD FRONT. ASSOCIATED WITH AN UPPER RIDGE CENTERED OVER CENTRAL MEXICO/WESTERN GULF OF MEXICO RESULTS IN DRY AND WARM WEATHER. A COLD FRONT WILL PUSH INTO NORTHERN FLORIDA AND THEN STALL ACROSS CENTRAL FLORIDA SATURDAY NIGHT.
1015 PM CDT FRI APR 3 2015 THE COLD FRONT CONTINUES TO MAKE GOOD PROGRESS SEWRD THIS EVENING. ALTHOUGH WEAK OVERRUNNING N OF THE FRONT HAS RESULTED IN WIDELY SCT -SHRA REDEVELOPING NEAR THE 850MB TROUGH GENERALLY ALONG AND JUST S OF THE I-20 CORRIDOR OF E TX/N LA. DID KEEP LOW POPS AFTER 06Z FOR THE SRN ZONES UNTIL THE 850MB TROUGH IS ABLE TO CLEAR THESE AREAS BY 12Z SATURDAY. /ISSUED 631 PM CDT FRI APR 3 2015/ COLD FRONT HAS MOVED ACROSS THE KTXK.
836 PM EDT FRI APR 3 2015 PERIODS OF SHOWERS ARE EXPECTED TO CONTINUE INTO THE EARLY MORNING HOURS AS LOW PRESSURE AND A COLD FRONT TRACK ACROSS THE AREA. HIGH PRESSURE WILL BUILD IN FOR MUCH OF THE WEEKEND. SCATTERED RAIN SHOWERS WILL CONTINUE THROUGH THE LATE AFTERNOON IN ADVANCE OF LOW PRESSURE AND A COLD FRONT THAT WILL TRACK ACROSS THE REGION. AS THE LOW MOVES INTO THE REGION. ANY ACCUMULATION WOULD LIKELY BE LIMITED TO THE INTERSTATE 80 CORRIDOR AND THE HIGHER ELEVATIONS OF PA/WV/MD. HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE SOUTHWEST ON SATURDAY.
1224 AM EDT SAT APR 4 2015 AFTER LOW PRESSURE EXITS OVERNIGHT. HIGH PRESSURE WILL BUILD IN FOR THE WEEKEND. A FEW ADDITIONAL RAIN OR SNOW SHOWERS ARE POSSIBLE THROUGH EARLY MORNING AS THE MAIN UPPER TROUGH AXIS PASSES. THEN HIGH PRESSURE IS PROGGED TO QUICKLY BUILD IN BRINGING A CLEARING TREND TO START THE WEEKEND.
/ISSUED 633 PM CDT FRI APR 3 2015/ /00Z TAFS/ A COLD FRONT IS MOVING ACROSS SOUTH CENTRAL TEXAS LATE THIS AFTERNOON/EARLY EVENING. LIGHT SHOWERS ARE POSSIBLE AS THE COLD FRONT PUSHES ACROSS THE COASTAL PLAINS. A COLD FRONT ALONG A LANGTRY TO ROCKSPRINGS TO BURNET TO TEMPLE LINE WILL MOVE SOUTH ACROSS THE REMAINDER OF SOUTH CENTRAL TEXAS THIS AFTERNOON INTO EARLY EVENING.
1158 PM EDT FRI APR 3 2015 A WAVE OF LOW PRESSURE WILL RIDE NORTHEASTWARD ALONG A FRONT STALLED ACROSS CENTRAL PENNSYLVANIA THROUGH TONIGHT.
ADJUSTED THE HOURLY VALUES TO ACCOUNT FOR THE SLIGHTLY COOLER TEMPS.
909 PM PDT FRI APR 3 2015 A cold front will pass through the region tonight bringing a chance of showers.
HIGH PRESSURE RIDGE AXIS ACROSS THE REGION WILL KEEP WINDS OUT OF THE S/SE UP TO 10-15KTS TONIGHT. A COLD FRONT WILL MOVE THROUGH N FL SATURDAY MORNING AND IS FORECAST TO APPROACH NRN PORTIONS OF EAST CENTRAL FL BY EARLY EVENING. UPPER LEVEL RIDGE OVER THE SOUTHERN PLAINS TRACKS TO THE SOUTHEAST STATES. A FRONTAL BOUNDARY THAT HAS BECOME ORIENTED WEST TO EAST WAS SLOWLY DROPPING SOUTH DOWN FLORIDA WITH HIGH PRESSURE OVER KENTUCKY TENNESSEE. NORMALLY THE HIGH WOULD MOVE INTO FLORIDA BEHIND THE FRONT BUT INSTEAD BEGINS TO ELONGATED WEST TO EAST INTO THE ATLANTIC AS THE MID/UPPER LEVEL FLOW BECOMES ZONAL.
BY LATE MORNING SOUTHERLY WINDS WILL INCREASE AS LEE TROUGH STRENGTHENS AND MIXING DEEPENS. WINDS WILL THEN INCREASE AGAIN INTO THE 20 TO 30 MPH RANGE WITH HIGHER GUSTS AS A NEW LEE-SIDE TROUGH TAKES SHAPE OVER EASTERN COLORADO AND EASTERN NEW MEXICO.
1043 PM CDT FRI APR 3 2015 VFR CONDITIONS WILL PREVAIL THROUGH THE DAY SATURDAY AS HIGH PRESSURE BUILDS INTO THE OHIO RIVER VALLEY.
BROKEN LINE OF THUNDERSTORMS MOVING ACROSS CENTRAL ALABAMA TONIGHT AHEAD OF A COLD FRONT. THESE WINDS WILL USHER IN COOLER AIR.
SEVERE RISK WILL BE MAINLY LIMITED TO A FEW OF OUR SERN COUNTIES FOR THE NEXT HOUR OR SO AHEAD OF SFC COLD FRONT. A RATHER DRY AND CHILLY AIRMASS WILL FOLLOW FOR MOST OF THE WEEKEND WITH HIGH PRESSURE GRADUALLY BUILDING IN THE FROM THE PLAINS. AS THE HIGH PRESSURE WILL BE CLOSER AND WINDS SHOULD DECOUPLE. HIGH PRESSURE WILL BE OFF TO THE EAST BY THE FIRST OF THE WORK WEEK WITH A QUASI STATIONARY FRONT MEANDERING OVER THE AREA FOR MOST OF THE WEEK.
748 PM EDT FRI APR 3 2015 PERIODS OF SHOWERS ARE EXPECTED TO CONTINUE INTO THE EARLY MORNING HOURS AS LOW PRESSURE AND A COLD FRONT TRACK ACROSS THE AREA. HIGH PRESSURE WILL BUILD IN FOR MUCH OF THE WEEKEND. SCATTERED RAIN SHOWERS WILL CONTINUE THROUGH THE LATE AFTERNOON IN ADVANCE OF LOW PRESSURE AND A COLD FRONT THAT WILL TRACK ACROSS THE REGION. AS THE LOW MOVES INTO THE REGION. ANY ACCUMULATION WOULD LIKELY BE LIMITED TO THE INTERSTATE 80 CORRIDOR AND THE HIGHER ELEVATIONS OF PA/WV/MD. HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE SOUTHWEST ON SATURDAY.
1013 PM CDT FRI APR 3 2015 RADAR IMAGERY/SFC OBS SHOW THE COLD FRONT MAKING STEADY SWD PROGRESS INTO THE FORECAST AREA. A THIN BAND OF SHOWERS OVER EAST TEXAS ASSOCIATED WITH A COLD FRONT WILL CONTINUE TO MOVE SOUTHEAST AT 13 KNOTS. /ISSUED 230 PM CDT FRI APR 3 2015/ COLD FRONT MOVING SE ACROSS C TO NE TX THIS AFTERNOON. NORTHERLY WINDS WILL USHER COOLER AND DRIER AIR TO THE REGION. LOOKS LIKE THE HIGHEST CHANCES WILL BE ACROSS INLAND SE TX/C LA. DML LIGHT TO MODERATE ONSHORE FLOW IS EXPECTED THIS AFTERNOON AND EVENING AHEAD OF A COLD FRONT THAT WILL MOVE THROUGH THE AREA TONIGHT. A STRONG OFFSHORE FLOW WILL DEVELOP IN THE WAKE OF THE COLD FRONT BY EARLY SATURDAY MORNING.
807 PM EDT FRI APR 3 2015 A COLD FRONT AND WAVES OF LOW PRESSURE WILL MOVE EAST TONIGHT.
756 PM EDT FRI APR 3 2015 A WAVE OF LOW PRESSURE WILL RIDE NORTHEASTWARD ALONG A FRONT STALLED ACROSS CENTRAL PENNSYLVANIA THROUGH TONIGHT.
EXPECT CLEARING THIS EVENING WITH MUCH COOLER CONDITIONS OVERNIGHT. A RATHER DRY AND CHILLY AIRMASS WILL FOLLOW FOR MOST OF THE WEEKEND WITH HIGH PRESSURE GRADUALLY BUILDING IN THE FROM THE PLAINS. AS THE HIGH PRESSURE WILL BE CLOSER AND WINDS SHOULD DECOUPLE. HIGH PRESSURE WILL BE OFF TO THE EAST BY THE FIRST OF THE WORK WEEK WITH A QUASI STATIONARY FRONT MEANDERING OVER THE AREA FOR MOST OF THE WEEK.
1037 PM MDT FRI APR 3 2015 A FLAT RIDGE WILL MOVE OVER THE REGION TONIGHT AND ON SATURDAY. THEN BY SAT NIGHT THE FLOW WILL TAKE ON A MORE SOUTHWEST COMPONENT AS THE RIDGE SHIFTS EAST AND LOW PRESSURE STRENGTHENS OFF THE PACIFIC NORTHWEST COAST. BELOW FREEZING TEMPERATURES ARE AGAIN EXPECTED AREA-WIDE. SINCE THE UPPER RIDGE WILL BE QUITE FLAT. SAT NIGHT WILL ALSO BE SIGNIFICANTLY WARMER. COOLER WITH SHOWERS LATE A FLAT WEST TO EAST FLOW BUCKLES LATE IN THE WEEK AS A SEASONABLY STRONG LOW PRESSURE SYSTEM PASSES OVER THE REGION.
COLD DRY CANADIAN HIGH PRESSURE WL RIDGE/BUILD SEWD TOWARD LAKE SUPERIOR BENEATH THE UPR CONFLUENT ZONE.
837 PM EDT FRI APR 3 2015 A WAVE OF LOW PRESSURE WILL RIDE NORTHEASTWARD ALONG A FRONT STALLED ACROSS CENTRAL PENNSYLVANIA THROUGH TONIGHT.
809 PM EDT FRI APR 3 2015 HIGH PRESSURE OFF THE COAST WILL DIRECT A WARM SOUTHERLY FLOW INTO THE FORECAST AREA AHEAD OF AN APPROACHING COLD FRONT.
RADAR SHOWS SOME ENHANCEMENT IN THE LOW/MID LEVEL REFLECTIVITIES IN NORTHEASTERN MONTANA AND NORTHWESTERN NORTH DAKOTA. COULD POSSIBLY BE A CLAP OF THUNDER OVER THE FAR SOUTHEAST CWA AHEAD OF THE LOW. LEFT SOME SMALL POPS NORTH CENTRAL ALONG THE COLD FRONTAL ZONE.
1037 PM CDT TUE MAR 24 2015 A COLD FRONT WILL PASS THROUGH THE PANHANDLES DURING THE LATE MORNING. CONFIDENCE IS NOT HIGH ENOUGH TO MENTION THE LOWER CIGS AT THIS TIME. WINDS WILL SHIFT TO NORTHWEST AND NORTH BEHIND A COLD FRONT WEDNESDAY MORNING. A STRONG COLD FRONT WILL MOVE ACROSS THE OK AND TX PNHDLS WEDNESDAY.
A LOW PRESSURE SYSTEM PUSHING THROUGH THE REGION TONIGHT INTO EARLY WEDNESDAY WILL BRING THE OPPORTUNITY FOR SHOWERS AND PERHAPS A RUMBLE OF THUNDER TO THE AREA.
1156 PM EDT TUE MAR 24 2015 LOW PRESSURE TRACKS TOWARD THE GREAT LAKES OVERNIGHT. LIFTING A WARM FRONT NORTH OF THE AREA ON WEDNESDAY.
SOME OF THE HIGHER RESOLUTION MESOSCALE MODELS SUGGEST THAT EARLY AM -SHRA COULD LIFT UP OFF THE GULF SO WILL ADD A TEMPO GROUP FOR THIS TOWARD DAYBREAK.
1012 PM EDT TUE MAR 24 2015 LOW PRESSURE TRACKS TOWARD THE GREAT LAKES OVERNIGHT. LIFTING A WARM FRONT NORTH OF THE AREA ON WEDNESDAY.
810 PM MDT TUE MAR 24 2015 UPDATED THE SHORT TERM POP GRIDS TO SHOW THAT SNOW WILL OCCUR OVER THE HIGH COUNTRY. "COLDER" COLD FRONT (COMPARED TO 24 HOURS AGO) SWEEPS SOUTHWARD OVERNIGHT WITH A DECENT THERMAL PACKING FOR A FEW HOURS. COLD FRONT MOVES TOO FAST TO GENERATE ADVISORY LEVEL AMOUNTS. PRECIP TODAY THROUGH TONIGHT WILL BE SUPPORTED BY THE WEST TO EAST JET AND IT IS SOMEWHAT LACKING BUT DOES PICK UP AS THE JET BECOMES NORTH TO SOUTH AND SUPPORTS AN UPPER LEVEL TROUGH. A LARGE AREA OF HIGH PRESSURE WILL START BUILDING INTO THE AREA AS SOON AS NOON TOMORROW WITH SKIES BECOMING SUNNY FROM WEST TO EAST THOUGH UNSETTLED WX WILL CONTINUE FOR THE MTNS. JUST ABOUT ALL THE SNOW WILL BE OVER AS RIDGING CONTINUES TO BUILD IN.
IT WILL BE SIGNIFICANTLY COOLER TONIGHT THAN IN RECENT NIGHTS FOR MOST OF THE AREA. ENERGY FROM THE UPPER TROUGH HAS HELPED INCREASE WINDS TO ADVISORY SPEEDS IN THE CENTRAL SNAKE BASIN.
731 PM CDT TUE MAR 24 2015 DOUBLE-BARRELED LOW PRESSURE TO AFFECT THE NORTHLAND THROUGH WEDNESDAY NIGHT WITH PRECIPITATION TYPE THE MAIN CONCERN. BOTH LOWS WILL MOVE EAST WITH THE UPPER TROF. PRECIPITATION HAS BROKEN OUT ALONG THE BAROCLINIC ZONE BETWEEN THE LOW WITH RAIN TO THE SOUTH OVER MN AND IOWA AND SNOW OVER THE OTHER IN NORTH DAKOTA.
755 PM EDT TUE MAR 24 2015 HIGH PRESSURE OVER THE EASTERN GREAT LAKES WILL BUILD SOUTHEAST ACROSS PENNSYLVANIA TONIGHT.
1048 PM EDT TUE MAR 24 2015 HIGH PRESSURE OVER THE EASTERN GREAT LAKES WILL BUILD SOUTHEAST ACROSS PENNSYLVANIA TONIGHT.
HIGH PRESSURE IS MOVING OFF TO THE NE THIS EVENING WITH A WARM FRONT DEVELOPING ACROSS THE MID STATE THAT WILL BECOME THE FOCUS FOR ADDITIONAL LOW-LEVEL MOISTURE ADVECTION OVER THE NEXT SEVERAL HOURS. LOOK FOR VFR STRATOCU CIGS TO DEVELOP LATER TONIGHT OR TOMORROW MORNING, BUT POP'S WILL REMAIN ~20% THRU TOMORROW, SO WILL LEAVE PRECIP OUT OF THE TAF'S GIVEN THE LOW RAIN CHANCES. NOTE THE NORTH WIND AND SLIGHTLY COOLER TEMPS AT CKV. SOUTH WINDS WERE PUSHING TEMPS INTO THE LOWER 70S FOR MOST LOCATIONS. A LOW PRESSURE SYSTEM FROM THE MID MS VALLEY WILL MOVE NORTHEAST TO THE GREAT LAKES REGION. WILL LIFT NORTHEASTWARD WITH THE LOW PRESSURE.
A WARM FRONT WILL BRING RAIN TO THE AREA OVERNIGHT THROUGH WEDNESDAY. HIGH PRESSURE ALOFT WILL BUILD OVER THE REGION WEDNESDAY NIGHT.
TEXT BULLETIN GUIDANCE (GFS/NAM) BOTH HAVE CONDS GOING DOWN TO VLIFR (100FT/1/4SM) BUT HI-RES GUIDANCE (NARRE/SREF/HRRR) HAS MIXED SIGNALS WITH SOME SHOWING JUST IFR CIGS/VSBYS WHILE SOME OF THIS GUIDANCE HAS THE LOWEST CIGS/VSBYS PROJECTED ALONG THE SE GA COAST. THEN TOWARDS MORNING THE LOWERING OF THE STRATUS DECK CLOSE TO THE GROUND AS WINDS WEAKEN CLOSER TO 2-4 KTS OR LESS.
929 PM EDT TUE MAR 24 2015 A WARM FRONT WILL INITIATE THE CHANCE FOR RAIN LATE TONIGHT AND WEDNESDAY.
MLC/FSM WILL HAVE THE HIGHER POTENTIAL OF REPORTING PRECIP AND WILL THUS CARRY VCTS FOR THESE LOCATIONS. DRAGGING A COLD FRONT ACROSS THE CENTRAL AND SOUTHERN PLAINS. WITH THE COLD FRONT STALLING ACROSS CENTRAL AND WESTERN ARKANSAS. BRINGING A STRONGER COLD FRONT INTO THE AREA AND A SECOND ROUND OF SHOWERS AND THUNDERSTORMS.
1142 PM EDT TUE MAR 24 2015 HIGH PRESSURE OVER THE EASTERN GREAT LAKES WILL BUILD SOUTHEAST ACROSS PENNSYLVANIA TONIGHT.
STRENGTHENING HIGH PRESSURE ALOFT WILL THEN BRING EVEN WARMER TEMPERATURES. OVERNIGHT THE LOW TEMPERATURES WILL AGAIN BE COOLING TO WITHIN A FEW DEGREES OF NORMAL VALUES IN MOST LOCATIONS. WATER VAPOR SATELLITE IMAGERY AND MODEL DATA SHOW A VERY WEAK TROUGH PASSING OVERHEAD TONIGHT. AND SLIGHTLY COOLER TEMPERATURES. THE BIGGEST INFLUENCE TO THE AREA THE REST OF THIS WEEK AND INTO THE WEEKEND WILL BE A RIDGE MOVING IN FROM THE WEST. CURRENTLY THE RIDGE IS BEGINNING TO BUILD JUST OFF THE WEST COAST. THE RIDGE WILL CONTINUE TO PUSH WEST.
AHEAD OF THE NEXT COLD FRONT ARRIVING SHORTLY AFTER THIS TAF CYCLE.
A 1010 MB LOW IS SITUATED JUST NORTH OF STL THIS HOUR, WITH A WARM FRONT DRAPED JUST NORTH OF MIDDLE TENNESSEE AND A LARGE AREA OF PRECIP OCCURRING NORTH OF THE FRONT.
Unseasonable cold is expected late in the week as a deep upper level trough develops over much of the eastern CONUS. Nighttime temperatures will drop below freezing late in the week. Flight conditions will continue to deteriorate into Wednesday night as a cold front moves across the region and widespread rainfall continues.
934 PM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE FORECAST AREA FROM THE NORTH TONIGHT.
STRONG HIGH PRESSURE ALOFT WILL RETURN FOR THE LATTER HALF OF THE WEEK. PRECIPITATION DEVELOPED OVER THE NORTHERN MOUNTAINS AND ALONG THE IDAHO BORDER EARLIER TODAY AHEAD OF SAID TROUGH. WITH THE TROUGH APPROACHING THE AREA. BUT IN GENERAL THESE WINDS WILL BE CONFINED MAINLY TO ALONG THE HIGHWAY 10 CORRIDOR AND THE CANYONS OF WASHINGTON COUNTY.
943 PM EDT TUE MAR 24 2015 HIGH PRESSURE WILL SHIFT OFFSHORE ON WEDNESDAY.
/ISSUED 318 PM CDT TUE MAR 24 2015/ WEAK UPPER LEVEL RIDGING PERSISTS ACROSS THE MID SOUTH THIS AFTERNOON AND HAS PROVIDED FOR VERY PLEASANT WEATHER OVER MUCH OF THE REGION TODAY WITH DRY CONDITIONS AND WARM TEMPERATURES. LOW PRESSURE IS ORGANIZING OVER SOUTHEAST KANSAS WITH A COLD FRONT EXTENDING TO THE SOUTHWEST INTO OKLAHOMA AND A WARM FRONT STRETCHED EAST ACROSS CENTRAL MISSOURI. THE LOW LEVEL AIR MASS BECOMES MUCH MORE STABLE WITH STORMS DIMINISHING IN COVERAGE AND INTENSITY AS THEY PUSH EAST INTO THE MID SOUTH.
THESE SHOWERS AND THUNDERSTORMS ARE ASSOCIATED WITH AN UPPER LEVEL TROUGH MOVING EASTWARD. THINK THE WEAKENING TREND WILL CONTINUE AS SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE EASTWARD ALONG WITH THE UPPER LEVEL TROUGH MOVING INTO A MORE STABLE AND CAPPED ENVIRONMENT ACROSS THE MIDSOUTH. /ISSUED 318 PM CDT TUE MAR 24 2015/ WEAK UPPER LEVEL RIDGING PERSISTS ACROSS THE MID SOUTH THIS AFTERNOON AND HAS PROVIDED FOR VERY PLEASANT WEATHER OVER MUCH OF THE REGION TODAY WITH DRY CONDITIONS AND WARM TEMPERATURES. LOW PRESSURE IS ORGANIZING OVER SOUTHEAST KANSAS WITH A COLD FRONT EXTENDING TO THE SOUTHWEST INTO OKLAHOMA AND A WARM FRONT STRETCHED EAST ACROSS CENTRAL MISSOURI. THE LOW LEVEL AIR MASS BECOMES MUCH MORE STABLE WITH STORMS DIMINISHING IN COVERAGE AND INTENSITY AS THEY PUSH EAST INTO THE MID SOUTH.
HIGH PRESSURE WILL BUILD OVER THE AREA THROUGH THE END OF THE WORK WEEK. RESULTING IN DRY WEATHER AND WARMER TEMPERATURES. SLIGHTLY COOLER CONDITIONS WILL DEVELOP OVER THE WEEKEND. EVENING WATER VAPOR SATELLITE IMAGERY SHOWS AN UPPER RIDGE AMPLIFYING JUST OFF THE WEST COAST.
1012 PM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE FORECAST AREA FROM THE NORTH TONIGHT.
A COLD FRONT WILL MOVE ACROSS THE AREA WEDNESDAY SHIFT WINDS. 19Z SFC ANALYSIS SHOWS THE COLD FRONT HAS CLEARED CENTRAL OK AND SHOULD REACH THE RED RIVER VALLEY AROUND 3 TO 4 PM. STRONGER COLD FRONT WILL MOVE SOUTHWARD OFF THE CENTRAL PLAINS INTO N/NW OK THROUGH THE MORNING HOURS. STORMS WILL INITIALIZE ON THE COLD FRONT.
743 PM EDT TUE MAR 24 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE FORECAST AREA FROM THE NORTH TONIGHT.
735 PM EDT TUE MAR 24 2015 HIGH PRESSURE IS CENTERED ACROSS FAR EASTERN ONTARIO PROVINCE. THE RIDGE STRETCHES DOWN ALONG THE EASTERN SEABOARD INTO THE EASTERN CWFA. THE LOW LEVEL MOISTURE WILL INCREASE OVERNIGHT ACROSS MUCH OF THE CWFA AND LOW LEVEL CLOUDS WILL SETTLE OVER MUCH OF THE REGION. THE WEDGE SHOULD START TO ERODE OVERNIGHT WEDNESDAY AS A COLD FRONT APPROACHES FROM THE NW.
The low ceilings will mix out shortly after sunrise, with VFR again for late morning and afternoon. At the surface, a weak cold front is moving into our northern zones this afternoon. The large trough currently in the northwestern U. will dig farther south into the south plains tomorrow as a strong northerly jet streak develops on the western side of the trough. This will send a cold front south toward the area tomorrow.
ZONAL FLOW ALOFT AND HIGH PRESSURE AT THE SURFACE WILL RESULT IN ANOTHER BENIGN NIGHT ACROSS THE REGION.
A COLD FRONT WILL MOVE ACROSS THE AREA WED AFTN/EVENING SHIFTING WINDS TOWARDS THE NORTH AND BECOMING STRONG. A COLD FRONT WILL MOVE ACROSS THE AREA WEDNESDAY SHIFT WINDS. 19Z SFC ANALYSIS SHOWS THE COLD FRONT HAS CLEARED CENTRAL OK AND SHOULD REACH THE RED RIVER VALLEY AROUND 3 TO 4 PM. STRONGER COLD FRONT WILL MOVE SOUTHWARD OFF THE CENTRAL PLAINS INTO N/NW OK THROUGH THE MORNING HOURS. STORMS WILL INITIALIZE ON THE COLD FRONT.
THUNDERSTORM CHANCES INCREASE WEDNESDAY AFTERNOON AND EVENING AS THE FRONTAL BOUNDARY PUSHES BACK SOUTHWARD AS A COLD FRONT. MVFR CONDITIONS WILL BE POSSIBLE WITHIN ANY THUNDERSTORM ACTIVITY WEDNESDAY AFTERNOON AND LOOKS TO BE MORE COMMON ACROSS THE REGION WEDNESDAY NIGHT AS THE COLD FRONT MOVES THROUGH.
803 PM EDT TUE MAR 24 2015 HIGH PRESSURE OVER THE EASTERN GREAT LAKES WILL BUILD SOUTHEAST ACROSS PENNSYLVANIA TONIGHT.
CHATTANOOGA AIRPORT, TN 55 75 59 71 / 10 10 10 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 53 74 54 72 / 10 10 10 80 OAK RIDGE, TN 53 74 54 70 / 10 10 20 80 TRI CITIES AIRPORT, TN 49 70 50 73 / 20 10 20 80.
900 PM CDT Tue Mar 24 2015 Weakening low pressure, currently centered over Missouri, will lift northeast into central Illinois by shortly after midnight. Still expect temperatures to rise for a time tonight to the east of the low track, although confidence is not as high as it was earlier tonight. Given the weakening nature of the low, and fairly strong high pressure over the eastern Great Lakes, the warm sector of the low is having a tough time making it northward. Brief surface/upper ridging will produce dry conditions with high temperatures ranging from the upper 50s north to the upper 60s south of I-70.
Skies have been clearing this evening in the interior as a ridge of high pressure begins to build over the area. The ridge of high pressure will be building over the state the next couple of days. Some high clouds may drift through the region on Wednesday but expect mostly sunny skies and warmer temperatures.
THE REMNANTS OF OUR PREVIOUS COLD FRONT REMAIN DRAPED OVER THE STRAITS OF FLORIDA AND THE BAHAMAS THIS EVENING. HIGH PRESSURE WILL RIDGE DOWN TO FLORIDA FROM THE EASTERN SEABOARD. OVER THE NEXT FEW DAYS THE HIGH WILL MOVE OFFSHORE FROM NEW YORK AND SHIFT OUR WINDS FROM THE NORTHEAST TO THE SOUTHEAST.
SLIGHT INCREASE IN SOUTH WINDS AND THERMAL TROUGH SLIDING EAST OVER THE AREA WILL ERODE LOW AND MID LAYER CEILINGS AT ALL TAF SITES BY 17Z WEDNESDAY.
804 PM EDT TUE MAR 24 2015 LOW PRESSURE TRACKS TOWARD THE GREAT LAKES TONIGHT. LIFTING A WARM FRONT NORTH OF THE AREA ON WEDNESDAY.
1045 PM CST THU JAN 29 2015 SKIES WILL RAPIDLY CLEAR FROM WEST TO EAST LATE THIS AFTERNOON INTO THIS EVENING AS MIXING DIES AWAY AND HIGH PRESSURE BUILDS INTO THE AREA.
HOWEVER, WITH THE LOW LEVELS REMAINING DRY THIS PRECIPITATION WILL MOST LIKELY EVAPORATE BEFORE IT REACHES THE GROUND LEADING TO VIRGA TO BE OBSERVED. THE BETTER CHANCE OF PRECIPITATION OCCURS OVERNIGHT AS THE LOWER PORTIONS OF THE ATMOSPHERE BECOMES SATURATED. TEMPERATURES FALL NEAR FREEZING AFTER MIDNIGHT AND THIS IS WHEN THE PRECIPITATION COULD MIX OR TURN OVER TO SNOW BY SUNRISE TOMORROW. LOWS TONIGHT LOOK TO DIP TO AROUND FREEZING (32F).
A WEAK UPPER LEVEL LOW HAS FORMED NEAR THE DALLES. THIS LOW WILL DRIFT SOUTH OVERNIGHT AS AN UPPER LEVEL RIDGE BUILDS INTO WASHINGTON. SOME LIGHT DRIZZLE IS POSSIBLE IN CENTRAL OREGON OVERNIGHT AS THE LOW DRIFTS SOUTH. THE LOW HAS WEAKENED THE SURFACE INVERSIONS OVER THE LOWER COLUMBIA BASIN SO THAT THE BASE OF THE STRATUS LIFTED THIS AFTERNOON. AS THIS LOW MOVES SOUTH OVERNIGHT THE SURFACE INVERSIONS WILL STRENGTHEN AGAIN TOMORROW MORNING. AS THE RIDGE REBUILDS TOMORROW FOG WILL BECOME MORE WIDESPREAD.
900 PM PST THU JAN 29 2015 A SLOW-MOVING TROUGH WILL BRING LIGHT RAIN AND HIGH ELEVATION SNOW TONIGHT AND FRIDAY.
INITIAL ROUND OF PRECIP IS EXPECTED TO SPREAD INTO SOUTHEAST NEBRASKA LATE TONIGHT WITH GFS FORECAST SOUNDINGS SHOWING MAINLY RAIN OR A MIX OF RAIN/SNOW WITH SURFACE TEMPERATURES IN THE LOWER TO MID 30S.
SATELLITE SHOWING THE LOW CLOUDS IN EASTERN SD SHRINKING THIS EVENING.
1156 PM CST THU JAN 29 2015 HIGH PRESSURE IN THE PLAINS WILL MOVE EAST THROUGH THE MIDWEST THROUGH THE PERIOD.
CLOUDS WILL CONTINUE TO THICKEN AND LOWER ACROSS THE AREA DURG THE NEXT 24 HOURS AS AN UPPER LEVEL LOW PRESSURE STORM SYSTEM BEGINS TO IMPACT THE REGION. /ISSUED 456 PM CST THU JAN 29 2015/ AN UPPER LEVEL TROUGH WILL MOVE INTO THE SOUTHWEST ON FRIDAY. WHILE MODELS HAVE TRENDED WARMER AND SOMEWHAT DRIER OVER THE PAST FEW DAYS. TEMPERATURES WILL APPROACH FREEZING AND A CHANGE OVER TO A WINTRY MIX OF RAIN/SNOW/SLEET IS POSSIBLE MAINLY WEST OF A GUYMON TO SPEARMAN TO CLARENDON LINE.
COLD FRONT FROM NEAR ROME GEORGIA TO DEMOPOLIS LATE THIS EVENING. BROUGHT IN A BRIEF PERIOD OF MVFR CEILINGS IN JUST BEHIND AN APPROACHING COLD FRONT. MOISTURE CONVERGENCE AHEAD OF THE COLD FRONT WILL ALLOW VFR CEILINGS TO QUICKLY DEVELOP OVER CENTRAL ALABAMA. 75 /ISSUED 256 PM CST THU JAN 29 2015/ AN UPPER-LEVEL TROUGH AXIS PASSING BY TO OUR NORTH IS SUPPORTING A COLD FRONT TO OUR NORTHWEST. MUCH COOLER CONDITIONS ARE EXPECTED ON FRIDAY AS HIGH PRESSURE MOVES IN BEHIND THE FRONT.
/ISSUED 938 PM CST THU JAN 29 2015/ 9 PM CST SURFACE ANALYSIS SHOWED A COLD FRONT WELL SOUTH OF THE MIDSOUTH. WITH A RIDGE AXIS EXTENDING SOUTHWARD INTO THE SOUTHERN PLAINS. /ISSUED 313 PM CST THU JAN 29 2015/ CLOUDS ARE INCREASING FROM NORTH TO SOUTH ACROSS THE FORECAST AREA AS A COLD FRONT CONTINUES TO MOVE THROUGH NORTH MISSISSIPPI THIS AFTERNOON. TEMPERATURES AHEAD OF THE COLD FRONT ARE IN THE 60S WHILE BEHIND THE FRONT READINGS HAVE DROPPED INTO THE 40S AND 50S. THE COLD FRONT SHOULD MOVE THROUGH THE REMAINDER OF THE FORECAST AREA BY THIS EVENING AND HIGH PRESSURE WILL START TO BUILD INTO THE REGION. DRY CONDITIONS WILL CONTINUE TONIGHT WITH LOWS FRIDAY MORNING IN THE LOW TO MID 30S. HIGH PRESSURE WILL REMAIN OVER THE CENTRAL U.
HIGH PRESSURE WILL BUILD IN FROM THE WEST LATE THIS AFTERNOON.
STAGNANT PATTERN CONTINUES OVER THE AREA WITH RIDGING TO THE NORTH AND AN UPPER LEVEL TROUGH TO THE SOUTH. THE UPPER LEVEL TROUGH WILL DEVELOP INTO A CLOSED LOW OVER SOUTHERN CALIFORNIA ON FRIDAY. THE LOW WILL BE TOO FAR SOUTH AND EAST OF THE DISTRICT TO PRODUCE ANY WRAPAROUND SHOWERS INTO OUR CWA. INSTEAD AN UPPER LEVEL RIDGE WILL BUILD OFF THE CALIFORNIA COAST BEHIND THE LOW.
THE NEXT SHORT WAVE TROUGH WILL ROTATE IN BY AROUND DAWN. SUB- FREEZING TEMPERATURES ARE STILL WELL UPSTREAM AND WILL TAKE A GOOD CHUNK OF THE NIGHT TO SEE THEM GET HERE. BUT IT LOOKS LIKE SOMETIME AFTER 2 AM WE SHOULD SEE THOSE SUBFREEZING TEMPS WORKING INTO OUR AREA. A SURFACE COLD FRONT WAS ENTERING THE JKL FORECAST AREA FROM THE NW AT MID AFTERNOON. IT WILL BE FURTHER AIDED BY THE SUPPORT OF THE MID/UPPER LEVEL TROUGH AXIS PASSING OVER TONIGHT AND EARLY FRIDAY. THE LAST OF THE SNOW SHOWERS WILL TAPER OFF DURING THE DAY FRIDAY AS HIGH PRESSURE BUILDS IN AND UPSLOPE FLOW IS LOST. THIS PERIOD STARTS OUT QUIET WITH HIGH PRESSURE OVERHEAD AND TEMPERATURES NEAR 40 DEGREES.
THEN ANOTHER CHANCE FOR LIGHT SNOW AHEAD OF A COLD FRONT SAT IN THE SOUTH.
1132 PM CST Thu Jan 29 2015 Nice cold frontal passage this morning; we got everything but cold air. Went very pessimistic on clearing of the low clouds. If the low clouds prove to be more stubborn, we will not be cold enough.
LATEST SURFACE ANALYSIS SHOWS COLD FRONT HAS PUSHED ITS WAY INTO NW GEORGIA. THE EXCEPTION TO THIS WILL BE THE HIGHER ELEVATIONS OF THE MOUNTAINS WHERE THE LOCAL WRF IS INDICATING POSSIBLE GUSTS TO 40 KTS FOR MUCH OF THE DAY.
This would put most of our forecast area in a warmer low lvl southeasterly flow regime, which does not bode well for significant winter weather in this region.
SUNNY TO MOSTLY SUNNY SKIES PREVAIL THIS AFTERNOON WITH A BROAD AREA OF HIGH PRESSURE ANCHORED OVER THE CWA. WE WILL BE SANDWICHED IN BETWEEN THE UPPER LOW TO THE SOUTH AND A FAIRLY ACTIVE NORTHERN STREAM. SO KEPT OUR POPS ON THE LOW END EVEN IN THE MOUNTAINS. SO CONFIDENCE IS DEFINITELY HIGHER WITH LIGHT SNOW SPREADING INTO THE LOWER ELEVATIONS.