Aikyam-Lab/Synoptic-Bench huggingface dataset:
1254 PM CST SAT MAR 7 2015 A WEAK SHORT WAVE TROUGH WILL MOVE THROUGH THE NORTHERN PLAINS. WARMER THAN EARLIER THOUGH TODAY SO RAISED HIGH TEMPS 2 TO 5 DEGREES ACROSS THE SNOW FREE AREAS ACROSS THE WEST AND SOUTH CENTRAL. ABUNDANT SUNSHINE ACROSS THE SOUTH CENTRAL THIS MORNING WITH A MIXING NORTHWEST WIND OF 10 TO 15 MPH SHOULD BUMP TEMPERATURES A BIT INTO THE LOWER 50S SOUTHWEST TO MID 40S SOUTH CENTRAL. THE NAM12/RAP13 KEEP THE HIGHEST RELATIVE HUMIDITIES CONFINED MAINLY TO FAR WEST AND SOUTHWEST THROUGH 15Z SATURDAY. REFLECTION AT THE SURFACE WITH LOW PRESSURE FORECAST TO SLIDE ACROSS CENTRAL SASKATCHEWAN THROUGH 18Z SATURDAY AFTERNOON AND THEN INTO MANITOBA BY LATE AFTERNOON. A LITTLE COOLER BUT STILL MILD TEMPERATURES ARE EXPECTED OVER THE NORTHEAST HALF OF THE FORECAST AREA.
A FAIRLY WEAK AND MOISTURE-STARVED NORTHERN STREAM SHORT WAVE TROUGH WILL MOVE THROUGH THE AREA THIS AFTERNOON. WITH THE LOSS OF ICE CRYSTALS FALLING INTO THE LOWER CLOUD LAYER AND A HIGH SNOW GROWTH ZONE. A WEAK COLD FRONT WILL CROSS THE AREA LATE TONIGHT SETTING UP A PUSH OF COLDER AIR THROUGH SUNDAY.
256 PM EST SAT MAR 7 2015 HIGH PRESSURE WILL DRIFT SOUTH OF THE COMMONWEALTH TODAY. THE UPPER TROF SHOULD SWING THROUGH THE EASTERN GR LAKES TONIGHT AND TRACK NORTH OF LAKE ONTARIO BY 06Z. TONIGHT'S TEMPS WILL AVERAGE 10 TO PERHAPS AS MUCH AS 30 DEGREES WARMER THAN LAST NIGHT'S FRIGID LOWS. HOWEVER THE LOW LEVEL THERMAL TROUGH WILL ONLY GRADUALLY LIFT AND PULL EAST OF THE AREA DURING THE LATTER HALF OF THE DAY. BUT HIGHS OVERALL WILL STILL GENERALLY RANGE FROM THE LOWER TO MIDDLE 30S. UPPER LOW NOW OVER SRN CALIF IS FORECAST TO MOVE EVER-SO-SLOWLY EAST INTO THE CENTRAL/SRN PLAINS BY MID WEEK.
EARLY THIS MORNING A COLD FRONT WAS JUST ENTERING THE FORECAST AREA FROM NEAR INTERNATIONAL FALLS TO WALKER. THERE WILL BE ABOUT A 12 HOUR PERIOD OF RIDGING ACROSS THE REGION BEFORE ANOTHER STRONG SHORT WAVE AND CANADIAN LOW PRESSURE ENTERS NWRN MN TNT AND MOVES ACROSS THE REGION. IN THAT THEY BRING A SERIES OF S/WVS THROUGH THE UPPER TROF IN A FAIRLY CONSISTENT PATTERN. IT WILL BE A BIT WARMER SUNDAY. THEN AN UPPER RIDGE REDEVELOPS LATE IN THE PERIOD OVER THE WESTERN CONUS/WESTERN CANADA.
357 PM EST SAT MAR 7 2015 A DRY RIDGE OF HIGH PRESSURE WILL DOMINATE OUR WEATHER THROUGH SUNDAY. HIGH PRESSURE WILL PERSIST OVER THE REGION TONIGHT WITH REASONABLE RADIATIONAL COOLING EXPECTED THROUGH A DRY AIRMASS. LOWS SHOULD BE A BIT WARMER TONIGHT THAN THIS MORNING DUE TO THE LOW LEVEL JET AND GENERAL MODIFICATION OF THE AIRMASS UNDER A FULL DAY OF SUNSHINE. THE AREA OF HIGH PRESSURE WILL BEGIN SHIFTING EASTWARD AND OFF THE CAROLINA COAST SUNDAY THROUGH SUNDAY NIGHT. EXPECT HIGH CLOUDS TO INCREASE THROUGH SUNDAY NIGHT AHEAD OF THE MAIN MID/UPPER LEVEL TROUGH ACROSS THE WESTERN PORTION OF THE COUNTRY. EXPECT HIGHS AROUND 70 WITH LOWS IN THE LOWER AND MIDDLE 40S.
WILL RAISE TEMPS A FEW DEGREES MORE IN THE SW AS ONCE THE CLOUDS THERE DEPART TEMPS ARE ALREADY IN THE LOW 40S TO THE WEST. THE LOWER CEILINGS/VSBYS IN SOUTHEAST SASKATCHEWAN WILL PROBABLY NOT GET INTO THE NW FA UNTIL MID AFTERNOON OR LATER. TEMPS TODAY WILL BE A BIT COOLER THAN YESTERDAY. ALTHOUGH WITH A WARMER START FOR MOST AREAS IF THERE IS SUNSHINE NEAR SNOW FREE AREAS SHOULD STILL GET BACK INTO THE MID 30S AT LEAST.
115 PM EST SAT MAR 7 2015 HIGH PRESSURE OVER THE AREA THIS MORNING SLIDES OFFSHORE THIS AFTERNOON. A WEAK TROUGH OF LOW PRESSURE DROPS INTO THE AREA LATE SUNDAY.
/ISSUED 344 AM EST TUE FEB 24 2015/ DENSE FOG CONTINUES TO ENVELOP MUCH OF SOUTHWEST FLORIDA EARLY THIS MORNING AS A WEAK COLD FRONT REMAINS DRAPED ROUGHLY ACROSS THE LAKE OKEECHOBEE AREA. SEA FOG IS ALSO SEEN ACROSS THE RELATIVELY COOL GULF WATERS WHERE WATER TEMPERATURES HAVE AVERAGED IN THE LOW TO MID 60S OVER THE PAST FEW DAYS.
HIGH PRESSURE OVER THE GREAT BASIN WILL RESULT IN DRY WEATHER WITH TEMPERATURES NEAR NORMAL.
711 AM EST TUE FEB 24 2015 A WEAK RIDGE OF HIGH PRESSURE WILL BE OVER THE NORTH COUNTRY TODAY. A LOW PRESSURE AREA MOVING SOUTHEAST FROM CANADA WILL BRING A CHANCE OF SNOW SHOWERS TO THE REGION TONIGHT AND WEDNESDAY. AN ARCTIC COLD FRONT WILL MOVE THROUGH THE REGION ON WEDNESDAY BRINGING YET ANOTHER ROUND OF ARCTIC AIR TO THE NORTH COUNTRY.
446 AM MST TUE FEB 24 2015 OLD CLOSED LOW OVER NW AZ IS FORECAST TO MOVE SLOWLY TO THE EAST SOUTHEAST INTO NM BY THIS AFTERNOON. ALREADY SEEING TEMPERATURES WARMING ACROSS THE HIGH COUNTRY AND SPREADING DOWN INTO THE LOWER EASTERN SLOPES WITH THE WESTERLY WINDS. COLORADO SPRINGS WHICH WAS IN THE SINGLE DIGITS LAST EVENING HAS WARMED INTO THE LOWER 20S. AND NORTH TO NORTHWEST BREEZES THIS MORNING SHOULD HELP TEMPERATURES WARM TO ABOVE FREEZING. KEPT THEM IN THE LOWER 30S ACROSS THE SAN LUIS VALLEY. SO SOME AREAS MAY ACTUALLY END UP SLIGHTLY COOLER THAN YESTERDAY. INCREASING NORTHWEST FLOW LEADS TO LEE TROFFING AND INCREASING WESTERLY WINDS. THIS SHOULD KEEP LOWS IN THE 20S ALONG THE LOWER EASTERN SLOPES. WHILE THE LOWER ARKANSAS RIVER VALLEY DROPS INTO THE TEENS.
CHATTANOOGA AIRPORT, TN 42 26 41 27 / 60 0 50 60 KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 22 39 25 / 80 10 30 60 OAK RIDGE, TN 39 23 39 25 / 60 0 30 40 TRI CITIES AIRPORT, TN 36 19 36 22 / 80 10 20 50 NC.
CHATTANOOGA AIRPORT, TN 42 26 41 29 / 60 0 50 60 KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 22 39 32 / 80 10 30 60 OAK RIDGE, TN 39 23 39 28 / 60 0 30 40 TRI CITIES AIRPORT, TN 36 19 36 27 / 80 10 20 50 NC.
A decaying warm frontal boundary intersects the first boundary along the coastline and extends east-northeastward from near Cross City, FL to Jacksonville, FL. As a +PV anomaly ejects through the upper level trough over the eastern CONUS today, this boundary will push eastward. A coastal low pressure system tomorrow is forecast to produce a widespread total of 1.
1006 AM EST TUE FEB 24 2015 A FEW SNOW SHOWERS WILL BE POSSIBLE TONIGHT AS A COLD FRONT MOVES THROUGH THE REGION.
602 AM CST TUE FEB 24 2015 SENT A QUICK UPDATE TO ACCOUNT FOR PATCHY FREEZING DRIZZLE OR SNOW FLURRIES THIS MORNING.
417 AM CST Tue Feb 24 2015 Upper closed low over AZ this morning will swing into NM later today and will pass across the area overnight.
616 AM EST TUE FEB 24 2015 ARCTIC HIGH PRESSURE WILL CREST ACROSS THE REGION TODAY. WEAK LOW PRESSURE WILL CROSS THE AREA TONIGHT INTO WEDNESDAY.
423 AM CST TUE FEB 24 2015 FREEZING LINE THIS MORNING STRETCHES FROM JUST SOUTH OF COLLEGE STATION TO CONROE AND EASTWARD INTO NORTHERN LIBERTY COUNTY. WILL KEEP THE FREEZING RAIN ADVISORY IN PLACE TO ACCOUNT FOR ANY DRIZZLE ACROSS SUB FREEZING AREAS ALTHOUGH IMPACTS ARE EXPECTED TO BE SLIGHT. PRIMARILY TO ELEVATED ROADWAYS AND BRIDGES. TEMPERATURES WILL RISE ABOVE FREEZING BY 9AM WITH AFTERNOON HIGHS IN THE LOW TO MID 40S ACROSS THE REGION. WONT TOTALLY RULE OUT THE CHANCE TO SEE A BRIEF PERIOD WEDNESDAY MORNING WITH SOME SLEET MIXED IN ACROSS HOUSTON OR TRINITY COUNTIES GIVEN THE STRENGTH OF THE LIFT ASSOCIATED WITH THE TROUGH.
LATEST AVAILABLE IR IMAGERY OVERLAID WITH MODEL STREAMLINE ANALYSIS AS OF 900 AM DEPICT LOW AMPLITUDE TROUGHING IN PLACE ACROSS THE NORTHERN HALF OF THE CONUS. AT THE SURFACE AND IN THE LOWER TO MIDDLE LEVELS. NEARSHORE GULF WATERS INSIDE THE FIVE FATHOM LINE NORTH OF THE LOWER AND MIDDLE KEYS. WHERE WATER TEMPERATURES ARE SLIGHTLY WARMER. AS ACROSS PORTIONS OF THE LOWER AND MIDDLE KEYS. AM LESS OPTIMISTIC REGARDING IMPROVEMENT OF THE DENSE FOG ACROSS THE GULF WATERS NORTH OF THE LOWER KEYS AS WELL AS GMZ033-GMZ034.
A FAST MOVING DRY COLD FRONT WILL PASS THROUGH THE SIERRA AND NORTHWEST NEVADA WEDNESDAY NIGHT, WITH LITTLE IMPACT TO THE REGION. ADDITIONAL WARMING IS EXPECTED WEDNESDAY AS MIXING IMPROVES AHEAD OF A DRY COLD FRONT, WHICH WILL SHIFT THROUGH THE REGION WEDNESDAY NIGHT.
632 AM EST TUE FEB 24 2015 A FEW SNOW SHOWERS WILL BE POSSIBLE TONIGHT AS A COLD FRONT MOVES THROUGH THE REGION.
A VERY LIGHT BAND OF FREEZING DRIZZLE IS MOVING THROUGH KSHV AT THE TIME OF THIS DISCUSSION. CIGS ARE A MIX OF MVFR/IFR AND SHOULD SLOWLY RISE THROUGH THE DAYTIME HRS WITH MANY LOCATIONS IMPROVING INTO AT LEAST THE LOW END OF VFR. ANOTHER STRONG UPPER TROUGH WILL MOVE ACROSS THE SRN PLAINS TONIGHT WHICH WILL LIKELY LEAD TO ANOTHER ROUND OF WIDESPREAD WINTRY PRECIP ACROSS THE REGION BEGINNING LATE IN THE TAF PERIOD AND CONTINUING INTO WEDNESDAY MORNING. /ISSUED 602 AM CST TUE FEB 24 2015/ SENT A QUICK UPDATE TO ACCOUNT FOR PATCHY FREEZING DRIZZLE OR SNOW FLURRIES THIS MORNING.
1004 AM EST TUE FEB 24 2015 A MIX OF WINTRY PRECIPITATION WILL CONTINUE ACROSS THE REGION TODAY AS LOW PRESSURE OFF THE COAST PROVIDES COLD AIR AND MOISTURE. WEAK HIGH PRESSURE WILL BUILD IN EARLY WEDNESDAY.
A cold front is expected to move into the area late this afternoon/early this evening with northerly winds behind it. There is also a slight chance of light freezing rain tonight for CNM and MAF. /ISSUED 417 AM CST Tue Feb 24 2015/ Upper closed low over AZ this morning will swing into NM later today and will pass across the area overnight.
FREEZING LINE ALONG I-10 NORTHWARD EARLY THIS MORNING. WITH THE FREEZING TEMPS. WITH THE CONTINUED THREAT TO BE ON ELEVATED ROADWAYS/BRIDGES & EXPOSED OBJECTS ABOVE GROUND. WILL KEEP THE FREEZING RAIN ADVISORY. GRADUALLY TAPERING OFF BY 10-11 AM AS TEMPS RISE ABOVE FREEZING. NO ACCUMULATIONS WITH THE TEMPS ABOVE FREEZING. AS SCHOOLS ARE ALREADY CLOSED FOR TODAY'S FREEZING RAIN THREAT. A MUCH NOTICEABLE WARMING TREND AND CHANCE OF SHOWERS EXPECTED BY SUN AS THE HIGH MOVES EAST WITH MOIST GULF RETURN FLOW COUPLED WITH ANOTHER UPPER AIR PERTURBATION. STRONGER OFFSHORE FLOW EXPECTED WEDNESDAY FROM AN AREA OF LOW PRESSURE TRACKING ACROSS THE NORTHERN GULF.
MUCH OF THE CWA WAS IN THE WARM SECTOR AHEAD OF A COLD FRONT MOVING INTO THE INTERNATIONAL BORDER REGION. THE MAIN FOCUS FOR TODAY WILL CONTINUE TO BE THE STRONG COLD FRONT THAT WILL MOVE SOUTHWARD ACROSS THE CWA DURING THE DAY. HIGHS SHOULD REACH NEAR ZERO IN THE FAR NORTH AND IN THE LOWER TEENS IN THE SOUTH.
AN UPPER RIDGE REMAINS CENTERED OFF THE COAST THIS MORNING, AND DEEP OFFSHORE FLOW CONTINUES OVER OUR REGION. WE WILL SEE ONE MORE DAY OF THAT TODAY, THEN THE RIDGE BEGINS TO BREAK DOWN AND RETROGRADE WEST, AND THE FLOW BECOMES ONSHORE LATER TONIGHT AND WEDNESDAY.
1011 AM EST TUE FEB 24 2015 ARCTIC HIGH PRESSURE WILL CREST ACROSS THE REGION TODAY. WEAK LOW PRESSURE WILL CROSS THE AREA TONIGHT INTO WEDNESDAY.
924 AM EST TUE FEB 24 2015 ARCTIC HIGH PRESSURE OVER THE REGION WILL SHIFT OFFSHORE TODAY. A COLD FRONT APPROACHES TONIGHT AND WILL PASS THROUGH THE REGION ON WEDNESDAY. HIGH PRESSURE BUILDS FROM THE WEST AS LOW PRESSURE PASSES TO THE SOUTH LATE THIS WEEK. THE HIGH MOVES OVER THE AREA THIS WEEKEND.
Looks like temperatures will rise above freezing today for a change. Temperatures will warm well above freezing Wednesday ahead of the approaching clipper system.
BOUNDARY WILL OSCILLATE ACROSS THE CENTRAL PENINSULA TODAY WITH AREAS TO ITS NORTH REMAINING IN A SHALLOW POST FRONTAL COOL AIRMASS AND WARMER/DRIER CONDITIONS TO THE SOUTH. AFTERNOON HIGHS A TOUGH CALL GIVEN THE LOW CLOUDS.
SEA FOG MAY REDEVELOP OVER THE WATERS WEDNESDAY AND WEDNESDAY NIGHT AS INCREASING SOUTHERLY FLOW AHEAD OF A COLD FRONT ONCE AGAIN ADVECTS WARM MOIST AIR OVER THE RELATIVELY COOLER SHELF WATERS.
THE CIRCULATION AROUND THIS LOW WAS DRAGGING DOWNSLOPE WARMED AIR SE INTO THE FCST AREA. THE COLD FRONT ASSOCIATED WITH THIS LOW WILL DROP S. MOST MODELS ARE CLUSTERED AROUND THE SREF MEAN WHICH HAS THE LOW OVER THE SANDHILLS BY DAYBREAK WED. 850-700 MB THICKNESS FROM THE NAM/GFS/EC SUGGEST A WARM NOSE AND A LOW-LVL THERMAL RIDGE WILL BE MOVING THRU. A SFC TROF WILL CROSS THE TERMINALS IN THE 09Z-12Z TIMEFRAME WITH A WSHFT FROM SW TO WNW. WINDS BECOME NW BEHIND THE TROF AND GRADUALLY DECREASE THRU THE DAY.
300 AM PST TUE FEB 24 2015 DRY AND WARMER TODAY BUT WITH GUSTY NORTH WINDS IN PARTS OF SAN BERNARDINO.
722 AM EST TUE FEB 24 2015 AVIATION A LOW PRESSURE SYSTEM MOVING THROUGH THE GREAT LAKES REGION TODAY WILL BRING WINDY CONDITIONS AND SOME LIGHT SNOW. A LOW PRESSURE SYSTEM AND APPROACHING COLD FRONT WILL CAUSE SNOW TO DEVELOP FROM NW TO SE ACROSS OUR FCST AREA LATER THIS MORNING AND AFTERNOON. SNOW SHOWERS WILL LINGER INTO THIS EVENING BEFORE HIGH PRESSURE BUILDS IN TO PRODUCE FAIR BUT COLD WX WEDNESDAY.
756 AM CST TUE FEB 24 2015 HAVE UPDATED THE FREEZING RAIN ADVISORY AND ENDED THE ADVISORY ACROSS THE I-10 CORRIDOR. FREEZING LINE ALONG I-10 NORTHWARD EARLY THIS MORNING. WITH THE FREEZING TEMPS. WITH THE CONTINUED THREAT TO BE ON ELEVATED ROADWAYS/BRIDGES & EXPOSED OBJECTS ABOVE GROUND. WILL KEEP THE FREEZING RAIN ADVISORY. GRADUALLY TAPERING OFF BY 10-11 AM AS TEMPS RISE ABOVE FREEZING. NO ACCUMULATIONS WITH THE TEMPS ABOVE FREEZING. AS SCHOOLS ARE ALREADY CLOSED FOR TODAY'S FREEZING RAIN THREAT. A MUCH NOTICEABLE WARMING TREND AND CHANCE OF SHOWERS EXPECTED BY SUN AS THE HIGH MOVES EAST WITH MOIST GULF RETURN FLOW COUPLED WITH ANOTHER UPPER AIR PERTURBATION. STRONGER OFFSHORE FLOW EXPECTED WEDNESDAY FROM AN AREA OF LOW PRESSURE TRACKING ACROSS THE NORTHERN GULF.
1024 AM EST TUE FEB 24 2015 A REINFORCING COLD FRONT WILL MOVE THROUGH TUESDAY NIGHT WITH LIGHT SNOW MAINLY NORTH OF PITTSBURGH. EXPECT THE SURFACE FRONT TO BE ACROSS THE RIDGES BY 12Z WEDNESDAY. UPPER LOW EJECTS OUT OF THE SOUTHWEST U.
temperatures remain in the lower to mid 20s this morning. With surface observations indicating areas of light fog and the San Angelo radar indicating light precipitation, areas of freezing drizzle will continued to mentioned through mid morning. For today, went with the lower MET MOS highs, as the GFS model was not indicating the more extensive upper level cloudiness that extended along/north of the I-20 corridor that extended west across southern New Mexico.
923 AM EST TUE FEB 24 2015 A WEAK RIDGE OF HIGH PRESSURE WILL BE OVER THE NORTH COUNTRY TODAY. A LOW PRESSURE AREA MOVING SOUTHEAST FROM CANADA WILL BRING A CHANCE OF SNOW SHOWERS TO THE REGION TONIGHT AND WEDNESDAY. AN ARCTIC COLD FRONT WILL MOVE THROUGH THE REGION ON WEDNESDAY BRINGING YET ANOTHER ROUND OF ARCTIC AIR TO THE NORTH COUNTRY.
AND WITH THE LOW LEVEL MIXING. HIGH PRESSURE WILL BUILD INTO THE AREA TONIGHT. THE LOW WILL BRING A SWATH OF ACCUMULATING SNOW TO THE MIDWEST. THE EXACT TRACK OF THE LOW IS IN QUESTION AND IS DEPENDENT ON THE POSITIONING OF THE 850 MB BAROCLINIC ZONE.
CONDITIONS ARE STILL SUPPORTIVE OF LIGHT FREEZING RAIN OVER THE EXTREME NORTHWEST PORTION OF THE AREA. AND WHILE WILL CONTINUE WITH THE FREEZING RAIN ADVISORY WITH THIS ISSUANCE. AN UPPER TROF MEANWHILE ADVANCES ACROSS THE SOUTHWEST STATES INTO THE SOUTH CENTRAL STATES TONIGHT.
AN UPPER LOW WILL EXIT UTAH THROUGH THIS MORNING. HIGH PRESSURE WILL BRIEFLY RETURN TO THE AREA THIS AFTERNOON.
647 AM EST TUE FEB 24 2015 A WEAK RIDGE OF HIGH PRESSURE WILL BE OVER THE NORTH COUNTRY TODAY. A LOW PRESSURE AREA MOVING SOUTHEAST FROM CANADA WILL BRING A CHANCE OF SNOW SHOWERS TO THE REGION TONIGHT AND WEDNESDAY. AN ARCTIC COLD FRONT WILL MOVE THROUGH THE REGION ON WEDNESDAY BRINGING YET ANOTHER ROUND OF ARCTIC AIR TO THE NORTH COUNTRY.
ALL AREA SURFACE TEMPERATURES ARE EXPECTED TO REMAIN ABOVE FREEZING. /ISSUED 423 AM CST TUE FEB 24 2015/ FREEZING LINE THIS MORNING STRETCHES FROM JUST SOUTH OF COLLEGE STATION TO CONROE AND EASTWARD INTO NORTHERN LIBERTY COUNTY. WILL KEEP THE FREEZING RAIN ADVISORY IN PLACE TO ACCOUNT FOR ANY DRIZZLE ACROSS SUB FREEZING AREAS ALTHOUGH IMPACTS ARE EXPECTED TO BE SLIGHT. PRIMARILY TO ELEVATED ROADWAYS AND BRIDGES. TEMPERATURES WILL RISE ABOVE FREEZING BY 9AM WITH AFTERNOON HIGHS IN THE LOW TO MID 40S ACROSS THE REGION. WONT TOTALLY RULE OUT THE CHANCE TO SEE A BRIEF PERIOD WEDNESDAY MORNING WITH SOME SLEET MIXED IN ACROSS HOUSTON OR TRINITY COUNTIES GIVEN THE STRENGTH OF THE LIFT ASSOCIATED WITH THE TROUGH.
CONTINUING TO SEE PATCHY LIGHT FREEZING RAIN/DRIZZLE POPPING UP ON RADAR OVER CENTRAL/EAST AND SOUTH SECTIONS THIS MORNING AS HRRR IS STILL INDICATING SOME WEAK ISENTROPIC ASCENT LINGERING IN THESE AREAS UNTIL MID MORNING. WILL KEEP THE FREEZING RAIN ADVISORY RUNNING UNTIL MID MORNING DUE TO EXISTING ICE PROBLEMS CONTINUING A BIT LONGER. MAY INITIALLY HAVE TO PUT UP WITH SOME MORE LIGHT FREEZING RAIN OVER CENTRAL AND SW SECTIONS AS SURFACE TEMPS WILL BE BELOW FREEZING IN THESE AREAS WHEN PRECIP BEGINS.
THE MORE EXTENSIVE SNOW/SLEET PACK ACROSS SE OK AND PORTIONS OF NE OK WILL WORK TO KEEP TEMPS COOLER BUT AGAIN WARMER THAN RECENT DAYS. THE NEXT STRONG COLD FRONT ARRIVES LATE WEDNESDAY NIGHT WITH GUSTY NORTH WINDS AND A RETURN TO SHARPLY COLDER TEMPS.
THE LOW CLOUDS. ALONG WITH COOL NORTHERLY FLOW WILL RESULT IN TEMPERATURES MOVING LITTLE FROM CURRENT READINGS IN THE LOWER/MID 50S. NW WINDS THIS MORNING WILL BACK TO THE NORTH THIS AFTN AS A COASTAL TROUGH DEVELOPS.
445 PM CST WED FEB 25 2015 LATE THIS AFTERNOON AN UPPER LEVEL TROUGH OF LOW PRESSURE. TEMPERATURES WARMED UP LATE THIS AFTERNOON AND ALLOWED SOME OF PREVIOUS HEAVY SNOW ACCUMULATION TO MELT ON THE BRIDGES AND OVERPASSES AND ROADWAYS. DURING THE OVERNIGHT HOURS WE EXPECT THE LOW TEMPERATURES TO DROP TO NEAR AND BELOW FREEZING WHICH WILL CAUSE MOISTURE ON THE BRIDGES AND OVERPASSES AND SOME ROADS TO RE-FREEZE. ANY ICE AND SNOW ACCUMULATION WILL START TO MELT ON THURSDAY AS THE HIGHS ARE EXPECTED TO WARM INTO THE MIDDLE 30S TO THE MIDDLE 40S.
AS UPPER LOW OVER NORTH MISSISSIPPI MOVES ACROSS THE AREA THIS EVENING AND TONIGHT. EXPECT CONTINUED COOLING/LIFT ALOFT TO HELP SATURATE THE LOW LEVELS AND LEAD TO SNOW REACHING THE SURFACE THROUGHOUT THE ADVISORY AREA. LATEST REPORTS FROM WEST TENNESSEE INDICATE 1 INCH OF SNOW ALREADY IN CHESTER COUNTY NEAR THE CORE OF THE UPPER LOW. EARLY SNOW SHOULD MOISTEN THE LOW LEVELS. DRY AIR CONTINUES TO LIMIT SATURATION OF THE LOW LEVEL AIRMASS AS SHOWN BY DEWPOINT DEPRESSIONS AS HIGH AS 15 DEGREES AT BNA.
A strong cold front will push south through the terminals after 06z tonight and will result in a wind shift to the northeast with wind speeds increasing to 15 to 25 mph and gusty. Highs will be cooler on Thursday with cold air advection and increased cloud cover.
722 PM EST WED FEB 25 2015 UPPER AIR PATTERN CONSISTS OF A TROUGH IN THE SOUTHERN PLAINS EMBEDDED IN A DEEP LONGWAVE TROUGH OVER MOST OF THE U.
WARM FRONT JUST SOUTH OF THE AREA WILL MOVE NORTH OF THE TAF SITES DURING THE EVENING. WINDS WILL SHIFT FROM SE TO S AND SW AND BECOME GUSTY AT TIMES AS LOW PRESSURE INTENSIFIES OVER THE FL PANHANDLE. IFR CIGS WIDESPREAD NORTH OF WARM FRONT. THEN COLD FRONT MOVES THROUGH WITH MODEL GUIDANCE SUGGESTING POTENTIAL FOR CIGS TO DROP BACK TO IFR.
PATTERN OVERVIEW/FORECAST: 19Z SFC ANALYSIS REVEALS COLD FRONT THAT PLOWED THROUGH NRN MICHIGAN LAST EVENING NOW ACROSS THE OHIO VALLEY AND EXTENDS BACK TO ANOTHER AREA OF LOW PRESSURE PRESSING INTO THE MIDWEST. ASSOCIATED BATCH OF CLOUDS AND SNOWFALL IS ALSO ADVANCING ACROSS THE MIDWEST AND NOSING INTO THE LOWER LAKES. LARGE EXPANSE OF HIGH PRESSURE CENTERED BACK ACROSS WESTERN CANADA WILL CONTINUE TO BUILD DOWN INTO THE PLAINS AND GREAT LAKES REGION KEEPING OUR TEMPS VERY COLD FOR THE NEXT COUPLE OF DAYS. OVERNIGHT, THE 500 MB TROUGH WILL MOVE THROUGH THE FORECAST AREA, SO THERE COULD BE A FLARE UP, BUT WILL EXPECT THAT ONCE IT IS THROUGH, THE SNOW SHOULD STOP.
EARLY SNOW SHOULD MOISTEN THE LOW LEVELS. DRY AIR CONTINUES TO LIMIT SATURATION OF THE LOW LEVEL AIRMASS AS SHOWN BY DEWPOINT DEPRESSIONS AS HIGH AS 15 DEGREES AT BNA.
THE LOWERING OF CC AND INCREASE IN ZDR MOVED THROUGH THE BIRMINGHAM AREA AT THE TIME OF THE CHANGEOVER AT THE BIRMINGHAM AIRPORT. EVENTUALLY ADDITIONAL HEAVY PRECIP SHOULD BRING THIS LINE BACK SOUTHWARD TOWARD THE I-20 CORRIDOR AS THE 850MB TROUGH PASSES THROUGH LATE THIS AFTERNOON.
/ISSUED 500 PM EST WED FEB 25 2015/ HAVE REMOVED MENTION OF FREEZING RAIN AS THIS NO LONGER APPEARS TO BE A POSSIBILITY ACROSS NORTH GA. LOOKS LIKE THE ACCUMULATING SNOW WILL BEGIN IN A FEW HOURS AS THE RAIN COOLED AIR HAS TIME TO GET DOWN TO OR BELOW FREEZING. THIS LOW CENTER HAS AN ABUNDANT AMOUNT OF GULF MOISTURE ASSOCIATED WITH IT AND WILL PUSH IT ACROSS GA THIS AFTERNOON THROUGH TONIGHT.
BRING IN LIGHT PCPN WITH A SHORT WAVE TROUGH FROM THE NORTHWEST OVERNIGHT AND THURSDAY MORNING.
1025 PM EST WED FEB 25 2015 LOW PRESSURE OVER NORTHERN FLORIDA THIS EVENING WILL TRACK NORTHEASTWARD ALONG THE GEORGIA AND SOUTH CAROLINA COAST LATE TONIGHT.
A disturbance is moving south across E NM along with a strong cold front. A strong cold front will push south through the terminals after 06z tonight and will result in a wind shift to the northeast with wind speeds increasing to 15 to 25 mph and gusty. Highs will be cooler on Thursday with cold air advection and increased cloud cover.
401 PM CST WED FEB 25 2015 FRIGID COLD FRONT SWEEPS SOUTH FROM KANSAS TONIGHT. H500 MB TROUGH OFF THE NORTHERN B.
551 PM CST WED FEB 25 2015 ARCTIC HIGH PRESSURE WILL CONTINUE TO DROP SOUTHEAST FROM CANADA BRINGING MAINLY CLEAR SKIES AND FRIGID TEMPERATURES. CURRENT SURFACE ANALYSIS SHOWS HIGH PRESSURE SETTLING THROUGH THE PRAIRIE PROVINCES INTO THE NORTHERN PLAINS. UPPER LEVEL ANALYSIS PLACES LOW TO THE EAST OF HUDSON BAY WITH RIDGE OFF THE WEST COAST BRINGING FAST NORTH/NORTHWEST FLOW TO OUR AREA. FRIGID AIRMASS WITH THE HIGH WILL BRING TEMPERATURES IN THE TEENS BELOW ZERO OVER MOST LOCATIONS WHICH.
SYSTEM WILL BRING DECENT ACCUMULATIONS TO PARTS OF IOWA AND ILLINOIS BUT LOSE A LOT OF ITS IMPACT AS IT SHIFTS EAST AND SOUTH AS ENERGY BECOMES ABSORBED IN TROUGH TAKING SHAPE ACROSS THE SE US. SREF PLUMES SUGGESTS 1 TO 2 INCHES ACROSS THE AREA WHICH ISN'T COMPLETELY OUT OF THE REALM OF CHANCE BUT WITH MAIN WAVE DROPPING SE VS MOVING ACROSS THE AREA THINK CHANCES ARE ON THE LOW SIDE RIGHT NOW.
RECENT MODELS HAVE DEPICTED A WARM LAYER AND SOME RAIN RIDGING NE INTO THE E TN VALLEY. TEMPERATURES STEADY OVERNIGHT SLIGHTLY BELOW FREEZING. CHATTANOOGA AIRPORT, TN 28 40 24 37 / 100 10 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 28 37 22 33 / 100 30 10 10 OAK RIDGE, TN 28 37 21 32 / 100 30 10 10 TRI CITIES AIRPORT, TN 27 35 21 29 / 100 40 10 10 NC.
541 PM CST WED FEB 25 2015 00Z TAF CYCLE AN UPPER TROUGH WILL APPROACH THE PANHANDLES BY 06Z THURSDAY RESULTING IN SNOW DEVELOPING AND SPREADING SOUTH ACROSS THE WESTERN PANHANDLES.
637 PM EST WED FEB 25 2015 LOW PRESSURE OVER NORTHERN FLORIDA THIS EVENING WILL TRACK NORTHEASTWARD ALONG THE GEORGIA AND SOUTH CAROLINA COAST LATE TONIGHT.
THINK THE WARNING AND ADVISORIES WILL PROBABLY BE ABLE TO BE CANCELLED EARLY FROM THE WEST THIS EVENING AS THE LOW PRESSURE SYSTEM MOVES EASTWARD. ARCTIC HIGH PRESSURE SYSTEM WILL BUILD INTO THE MIDSOUTH THURSDAY. LOWERED THE HIGH TEMPERATURES FOR THURSDAY ACROSS EAST CENTRAL AR INTO NORTH MS WHERE A DEEP SNOW COVER IS EXPECTED.
SURFACE ANALYSIS HAS THE COLD FRONT ALREADY THROUGH THE FORECAST AREA AND GUSTY NORTH WINDS ACROSS THE AREA. SINCE THE CENTER OF THE HIGH REMAINS TO THE NORTHEAST THROUGH THE PERIOD. THE COLD AIR HAS ALREADY STARTED TO MOVE INTO THE AREA THIS AFTERNOON AND TEMPERATURES FOR MUCH OF THE AREA ARE COOLER NOW THAN EARLIER. A DEEP UPPER LEVEL TROUGH WILL DIG SOUTH ACROSS THE WESTERN COAST PROVIDING OUR WINTER WEATHER FOR THE NEXT SEVERAL DAYS. THIS TROUGH WILL ALLOW MULTIPLE DISTURBANCES TO TREK ACROSS THE CENTRAL PLAINS.
A STRONG COLD FRONT CONTINUES TO MAKE ITS WAY INTO NW OK THIS EVENING.
VFR CONDITIONS WILL PREVAIL AT ALL TAF SITES IN ADVANCE OF AN APPROACHING COLD FRONT. /ISSUED 401 PM CST WED FEB 25 2015/ FRIGID COLD FRONT SWEEPS SOUTH FROM KANSAS TONIGHT. H500 MB TROUGH OFF THE NORTHERN B.
FOR 06Z AVIATION DISCUSSION BELOW TODAYS SNOW WILL CONTINUE TO ADVANCE EASTWARD ALONG THE I-80 CORRIDOR THIS AFTERNOON AS HIGH PRESSURE BUILDS IN FROM THE NORTHWEST. AS HIGH PRESSURE SETTLES IN THURSDAY TEMPERATURES WILL ONLY REBOUND INTO THE SINGLE DIGITS AT MOST LOCATIONS. WITH TEMPERATURES MODERATING THROUGH THE WEEKEND AS ARCTIC HIGH PRESSURE MOVES OFF TO THE EAST. WITH A BROAD POSITIVELY TILTED TROUGH MOVING THROUGH THE SOUTHERN ROCKIES INTO THE PLAINS. AND A SECONDARY TROUGH MOVING SOUTHEASTWARD FROM ALBERTA THROUGH THE UPPER MIDWEST.
CAN/T RULE OUT A FEW LIGHT SNOW FLURRIES ACROSS THIS AREAS ON THE BACKSIDE OF THE DEPARTING UPPER TROUGH. STILL EXPECTING BLACK ICE TO DEVELOP OVER AREA BRIDGES/OVERPASSES AND SOME ROADWAYS TONIGHT AS TEMPS FALL BELOW FREEZING.