Aikyam-Lab/Synoptic-Bench huggingface dataset:
WITH TEMPERATURES STRUGGLING TO RISE INTO THE LOWER 30S. WATER VAPOR IMAGERY SHOWS THE UPPER LOW OFF THE SOCAL COAST SLOWLY MOVING EASTWARD. ALTHOUGH THERE WILL STILL BE CONSIDERABLE MID AND HIGH-LEVEL CLOUD COVER THE DOWNSLOPING BREEZES AND EROSION OF THE LOW CLOUDS SHOULD ALLOW TEMPERATURES TO CLIMB INTO THE 50S AND 60S.
BY 03/18Z THE SFC S/SW WINDS OF 10-15KTS MAY HELP TO LIFT OUT SOME OF THE LOWER DECKS. /ISSUED 1045 AM CST MON MAR 2 2015/ WARMER AIR NOT FAR OFF. /ISSUED 316 AM CST MON MAR 2 2015/ FRONTAL BOUNDARY FROM NORTHERN GULF COAST TO NEAR LAFAYETTE AND BATON ROUGE TO SHIFT NORTHWEST THIS AFTERNOON REPLACING THE COLD AIRMASS ACROSS THE ARKLATEX WITH A MUCH WARMER AIRMASS.
WARM FRONT TURNED AROUND LAST NIGHT AND SHOVED INTO THE GULF AS HIGH PRESSURE BUILDS OVER THE MIDWEST. WARM AIR ADVECTION BEGINS IN EARNEST TUE MORNING AND BOUNDARY SHOULD PUSH BACK NORTH AS A WARM FRONT BRINGING GULF MOISTURE INTO THE REGION WITH TEMPS IN THE 70S. LESS PRECIPITATION TODAY AS SOUTHEASTERN TEXAS FALLS ON THE MORE SUBSIDENT WESTERN SIDE OF A WESTERN GULF TROUGH AXIS. AS A SURFACE WARM FRONT ADVANCES EASTWARD. /ISSUED 451 AM CST MON MAR 2 2015/ NORTH WINDS ALONG WITH AREAS OF FOG AND LIGHT RAIN ARE FOUND ACROSS SOUTHEAST TEXAS EARLY THIS MORNING WITH 3 AM TEMPERATURES RANGING FROM THE LOWER TO MID 40S NORTH TO THE LOWER 50S AT THE COAST.
AT 12Z MONDAY A 500MB TROUGH/LOW WAS JUST OFF THE SOUTHERN CALIFORNIA COAST WITH A +110KT 250MB JET STREAK LOCATED ON THE WEST SIDE OF THIS UPPER LEVEL SYSTEM. FURTHER NORTH ANOTHER UPPER LEVEL TROUGH WAS LOCATED ACROSS SOUTHWEST CANADA. A STRONG RIDGING UPPER JET WILL INTENSIFY ACROSS THE UPPER MIDWEST TODAY, INTENSIFYING THE SOUTHWEST FLOW ALOFT ACROSS THE SOUTHERN ROCKIES INTO THE HIGH PLAINS. OVERCAST SKIES WILL LIKELY IMPEDE INSOLATION, KEEPING TEMPERATURES FROM CLIMBING MUCH ABOVE THE FREEZING POINT ON THE LOWER PLAINS OF CENTRAL KANSAS HOWEVER, WARMER TEMPERATURES INTO THE 40S MAY BE POSSIBLE IN THE FAR SOUTHWEST SECTIONS. THIS WILL PUSH A COLD FRONT SOUTH ACROSS WESTERN KANSAS TUESDAY MORNING. BY TUESDAY NIGHT THE UPPER TROUGH BEGINS TO MOVE OUT ACROSS THE CENTRAL PLAINS.
423 PM EST MON MAR 2 2015 HIGH PRESSURE BUILDS IN FROM THE WEST TONIGHT AND SHIFTS OFFSHORE BY TUESDAY AFTERNOON. LOW PRESSURE WILL SWING THROUGH SOUTHERN CANADA TUESDAY NIGHT TRYING TO PUSH A WARM FRONT NORTH ACROSS THE REGION. AS THE LOW SHIFTS TO OUR NORTH.
PATCHY TO AREAS OF DRIZZLE ALSO WILL OCCUR AS WARMER/MOIST AIR WITH 30-40 KT LOW LEVEL JET OFF SURFACE OVERRUNS THE SHALLOW. THE MID LEVELS OF THE ATMOSPHERE DRY OUT SIGNIFICANTLY WITH BREAKS IN THE CLOUDS AND HIGHS IN THE LOWER 70S. BIG CHANGES ARE COMING BY MID WEEK AS STRONG COLD FRONT PUSHES THROUGH THE AREA AND ANOTHER WINTER PRECIPITATION TYPE EVENT UNFOLDS.
842 AM PST MON MAR 2 2015 A LOW PRESSURE SYSTEM WILL BRING PERIODS OF SHOWERS AND ISOLATED THUNDERSTORMS INTO THIS EVENING WITH A CHANCE OF SHOWERS LINGERING OVER COASTAL AREAS INTO TUESDAY MORNING.
BREEZY SOUTHERLY WINDS WILL DEVELOP TODAY AHEAD OF A COLD FRONT ENTERING WESTERN NORTH DAKOTA. UNDER SUNNY SKIES TEMPERATURES SHOULD EASILY CLIMB ABOVE FREEZING SOUTH AND WEST OF THE MISSOURI RIVER. A COLD FRONT WILL SWEEP THROUGH NORTH DAKOTA AFTER SUNSET TONIGHT.
Not only will the accumulating snow be an issue, but the refreezing of wet and/or slushy roads will create hazardous driving conditions by the Tuesday morning commute.
BROAD UPPER/MID LEVEL RIDGING CENTERED NEAR THE YUCATAN PENINSULA WILL GRADUALLY SHIFT EAST TOWARDS FLORIDA TONIGHT AND TUESDAY WITH STABLE AND GENERALLY RAIN FREE CONDITIONS CONTINUING THROUGH THE SHORT TERM PERIOD. WARM AND PLEASANT CONDITIONS WILL CONTINUE WITH LOWS TONIGHT IN THE LOW TO MID 60S AND HIGHS ON TUESDAY RANGING FROM THE MID 70S TO MID 80S.
THE FIRST IS AN UPPER LOW WHICH WILL DESCEND SOUTHWARD ACROSS CENTRAL MANITOBA LATE TONIGHT THROUGH TUESDAY. THE SECOND FEATURE IS A MID-LEVEL TROUGH MOVING ACROSS THE CENTRAL ROCKIES AND INTO THE CENTRAL PLAINS. THIS COLD FRONT WILL QUICKLY LIFT NORTHEASTWARD TONIGHT TOWARDS THE UPPER MIDWEST. IN THE LOW 20S BY 12Z /6AM CST/. WINDS BEHIND THE COLD FRONT WILL BE OUT OF THE NORTHWEST AT 15 TO 20 MPH WITH GUSTS TO 30-35 MPH.
SWEEPING SEWD INTO THE CNTRL PLAINS WILL ALLOW FOR PCPN CHANGE FROM LIQUID/FREEZING/FROZEN THROUGH TUESDAY MORNING. INITIAL ENVIRONMENTAL CONDITIONS BE SUPPORTIVE OF A DRIZZLE/FREEZING DRIZZLE TYPE EVENT THIS EVENING BEFORE COLUMN SATURATION AND DEEPENING CAA COMES INTO PLAY AFTER MIDNIGHT. BELIEVE THE NRN CWA WILL SEE SNOW ACCUMULATIONS UP TO AN INCH OR SO NORTH OF A LINE FROM ABOUT PLATTE SEE SOME PATCHY FREEZING RAIN OR DRIZZLE 03/06-12Z.
THE 16Z SURFACE ANALYSIS INDICATED THAT A WEAK TROUGH WAS SITUATED ALONG THE SOUTHERN PORTION OF THE FORECAST AREA. COLD FRONT HAS PUSHED SOUTH OF BOTH HSV/MSL WITH NNE FLOW OF 10G18 KTS EXPECTED TO PERSIST THROUGH 02/15Z. WINDS WILL INCREASE AND SHIFT TO SSE BY 08Z AS WARM FRONT MOVES NWD.
Temperatures are a little milder early this morning across much of the region, though Redding and Red Bluff are running 10 degrees cooler compared to 24 hours ago due to the lack of north winds compared to yesterday. While available moisture for this system will be quite meager, satellite imagery is showing TPW of around 1/2 inch being drawn back north ahead of this next wave, so there will be potential for a tenth or two of QPF in the northern Sierra along with an inch or two of snowfall accumulation over the higher elevations. High pressure begins to rebuild over the area later tonight and Tuesday with a return of generally light north to east winds bringing a drying and moderating airmass.
MAIN FOCUS IS ON POWERFUL FAST MOVING COLD FRONT THAT WILL ARRIVE TONIGHT AND EXIT THE REGION BY TUESDAY AFTERNOON. MEANWHILE A LOW PRESSURE SYSTEM PASSING SOUTH OF THE REGION WILL BRING SOME LIGHT SNOW TO EXTREME SOUTHEAST IDAHO. THE COLD FRONT WILL ARRIVE IN THE UPPER SNAKE PLAIN AND UPPER SNAKE HIGHLANDS AFTER MIDNIGHT TO AROUND THE POCATELLO AREA AROUND SUNRISE.
WARM FRONT WILL RISE NORTH THROUGH THE AREA THIS EVENING.
THERE WILL ALSO BE A BACKDOOR COLD FRONT OVER IDAHO AND MONTANA THAT WILL BRING LIMITED MOISTURE TO THE FORECAST AREA LATE THIS AFTERNOON AND TONIGHT. LESS THAN 2 INCHES CAN BE EXPECTED IN THESE AREAS (HEAVIER ACCUMULATIONS IN THE HIGHER TERRAIN OF WALLOWA COUNTY).
I except some isolated snow showers are falling in this as well, especially over the higher terrain. Then the other question is how effectively that would accumulate, again outside of the mountains, given things like ground temperature and air temperature which are expected to be above freezing.
A WARM FRONT. WILL MOVE NORTH TONIGHT BRINGING SOUTHERLY WIND AND WARMER TEMPS FOR TUESDAY. HOWEVER WITH AN APPROACHING SHORT WAVE AND COLD FRONT.
WARMER AND MORE MOIST AIR IS BUILDING NORTHWARD THROUGH NEBRASKA WHICH IS PUSHING THE DENDRITIC LAYER HIGHER AND FARTHER NORTH. MAINLY FROM ABOUT MIDNIGHT TO 8 AM WHERE THE SOUNDINGS ARE HINTING AT THE POTENTIAL FOR SOME LIGHT FREEZING DRIZZLE.
WHILE AN UPR RIDGE SITS OVER THE GULF OF MEXICO. A QUASI-STATIONARY FRONTAL TROF REMAINS SITUATED MORE OR LESS FM SRN MS SW TOWARD THE COASTAL WATERS/WRN GULF. THE FRONT SERVES AS A SHARP DEMARCATION BETWEEN WARMER AIR WITH TEMPERATURES IN THE UPPER 70S OVER THE LOWER ATCHAFALAYA BASIN. AND COOLER AIR NW OF THE BOUNDARY WHERE TEMPS HAVE CLIMBED LITTLE TODAY WITH TEMPERATURES STILL IN THE UPPER 40S ACRS CNTL LA.
SURFACE ANALYSIS THIS MORNING SHOWED A COLD FRONT DRAPED ACROSS THE NORTHWEST CORNER OF THE STATE. AND PUSH BACK NORTH AS A WARM FRONT TONIGHT AND TUESDAY.
321 PM EST MON MAR 2 2015 THE MAJOR SYNOPTIC FEATURES ACROSS THE REGION INCLUDE A STATIONARY FRONT ACROSS CENTRAL FLORIDA AND A LARGE AMPLITUDE MID TO UPPER LEVEL RIDGE CENTERED ACROSS THE CENTRAL GULF EXTENDING ACROSS SOUTH FLORIDA.
LAKE-EFFECT SNOW SHOWERS AND CLOUDS WERE DECREASING OVER FAR NC WI EARLY THIS MORNING AS HIGH PRESSURE AND DRIER AIR PUSHED IN FROM THE WEST. THE HIGHEST QPF AMOUNTS.
THE MAIN STORY WILL BE THE ARCTIC COLD FRONT STILL ON TRACK TO SWEEP ACROSS NORTH DAKOTA LATER THIS EVENING.
WARM FRONT TURNED AROUND LAST NIGHT AND SHOVED INTO THE GULF AS HIGH PRESSURE BUILDS OVER THE MIDWEST. WARM AIR ADVECTION BEGINS IN EARNEST TUE MORNING AND BOUNDARY SHOULD PUSH BACK NORTH AS A WARM FRONT BRINGING GULF MOISTURE INTO THE REGION WITH TEMPS IN THE 70S.
BTL AN UPPER LEVEL TROUGH IS SHEARING APART AS IT MOVES SOUTHEASTWARD THROUGH THE AREA TODAY. COLD AIR ALOFT DID RESULT IN A FEW SNOW SHOWERS ACROSS THE HIGHER RIDGES AND MOUNTAIN PEAKS EARLIER THIS MORNING AND THERE HAVE BEEN A FEW HUNDREDTHS OF AN INCH OF RAIN ALONG AND NEAR THE COAST, COASTAL MOUNTAINS, AND UMPQUA BASIN. THIS UPPER LEVEL TROUGH WILL CONTINUE TO SHEAR TODAY WITH MOST OF THE LOWER LEVEL MOISTURE ENDING UP WEST OF THE CASCADES WHILE THE MID AND UPPER LEVEL MOISTURE WILL BE GREATEST AS ONE HEADS EAST FROM THE CASCADES.
UNDER THE INFLUENCE OF AN UPPER RIDGE AND LOW LEVEL OFFSHORE FLOW. NORTHERLY FLOW ALOFT WILL CONTINUE TODAY AHEAD OF THE UPPER RIDGE OFFSHORE ALONG 140W. AS THE OFFSHORE UPPER RIDGE MOVES SLOWLY TOWARD THE PACIFIC NORTHWEST. THERE WILL BE PATCHY FOG OR FREEZING FOG DURING THE EARLY MORNING HOURS IN THE SOUTH PUGET SOUND REGION AND SOUTH INTERIOR.
A LOW PRESSURE SYSTEM WILL MOVE ACROSS NORTHERN ARIZONA TONIGHT.
211 PM EST MON MAR 2 2015 HIGH PRESSURE WILL MOVE ACROSS THE REGION TONIGHT.
1117 AM CST MON MAR 2 2015 FOR 18Z TAFS /ISSUED 1050 AM CST MON MAR 2 2015/ THE 16Z SURFACE ANALYSIS INDICATED THAT A WEAK TROUGH WAS SITUATED ALONG THE SOUTHERN PORTION OF THE FORECAST AREA.
1106 AM EST MON MAR 2 2015 DRIER HIGH PRESSURE THIS AFTERNOON INTO TONIGHT. A WARM FRONT TUESDAY. FOLLOWED BY A COLD FRONT TUESDAY NIGHT.
WE WILL SEE DEWPOINTS BEGIN TO RISE AS A WARM FRONT NEARS FROM THE SOUTH.
233 PM CST MON MAR 2 2015 THE MAIN CHALLENGE WILL BE SNOW/BLOWING SNOW AND STRONG COLD FRONT LATE TONIGHT AND TUE. THERE WILL ALSO BE A BAND OF SNOW BEHIND THE SURGING COLD FRONT. TEMPS WILL RECOVER AS HIGH PRESSURE SHIFTS EAST OF THE REGION.
1035MB HIGH PRESSURE SITUATED OVER NORTHERN MISSOURI THIS MORNING WITH AN INVERTED TROF/STATIONARY FRONT EXTENDING FROM NRN ALABAMA INTO THE LOWER MS VALLEY. SEEMS LIKE THE WINDOW FOR ANY FREEZING RAIN OR DRIZZLE IS CLOSING WITH THIS ADVECTION OF LOW LEVEL DRY AIR INTO NORTHERN AREAS. TEMPS RANGE FROM THE UPPER 20S NORTH TO THE LOWER 50S ACROSS MONROE COUNTY INVOF FRONTAL BOUNDARY. FRONTAL BOUNDARY WILL LIFT NORTH AS A WARM FRONT LATER TONIGHT AND EARLY TUESDAY BRINGING A RESPITE FROM THIS COLD SNAP. AS A COLD FRONT APPROACHES EXPECT NUMEROUS SHOWERS AND A FEW THUNDERSTORMS TO DEVELOP OVER THE NW HALF OF THE MIDSOUTH THROUGH THE DAY.
100 PM EST MON MAR 2 2015 LOW PRESSURE SOUTH OF NOVA SCOTIA WILL RAPIDLY MOVE OFF TO THE THIS AFTERNOON. AN ARCTIC COLD FRONT WILL CROSS THE AREA THIS EVENING. HIGH PRESSURE WILL BUILD TOWARD THE AREA TONIGHT AND TUESDAY FROM THE WEST.
AN UPR TROF CONTS TO ADVANCE ACRS THE RGN THIS EVE WITH SCT LGT SNW SHOWERS. UPSLOPE FLOW IS EXPD TO DVLP TONIGHT ALSO WITH MORE NMRS SNW SHOWERS IN THE RIDGES SE OF PIT.
416 PM CST SUN JAN 18 2015 HIGH PRESSURE OVER THE REGION TODAY HAS ALLOWED TEMPERATURES TO CLIMB MID TO UPPER 60S AS WINDS HAVE BECOME SOUTHWEST WITH DEW POINTS INCREASING.
A STRONG WESTERLY FLOW FOLLOWING THE PASSAGE OF A COLD FRONT WILL CONTINUE OVERNIGHT AND INTO MONDAY BEFORE A RIDGE OF HIGH PRESSURE BEGINS TO BULGE NORTHWARD ALONG THE COAST LATE MONDAY. GRADUALLY DECREASING MONDAY AS THE RIDGE BUILDS.
PERHAPS SOME FREEZING DRIZZLE. THERMAL PROFILES WILL START BELOW FREEZING. WITH PERHAPS A LITTLE LIGHT FREEZING RAIN ON THE SOUTHERN EXTENT OF THE PRECIP AS THE WARM AIR MOVES IN ALOFT. A BIT MORE VERY LIGHT FREEZING RAIN/SLEET IS POSSIBLE. THE COOLER TEMP PROFILES WILL BE FARTHER NORTHEAST.
640 PM EST SUN JAN 18 2015 A COLD FRONT OVER THE NORTHERN GREAT LAKES WILL BECOME STATIONARY NEAR LAKE ERIE LATE MONDAY.
LATEST AVAILABLE SATELLITE IMAGERY OVERLAID WITH MODEL STREAMLINE ANALYSIS AS OF 900 AM DEPICT THE AXIS OF A FULL LATITUDINAL NEGATIVELY TILTED TROUGH AXIS PRESENTLY EXTENDING FROM EASTERN ONTARIO SOUTH SOUTHEASTWARD TO EAST OF GEORGIA. AT THE SURFACE AND IN THE LOWER TO MID LEVELS. THE 025 MB RIDGING PRESENTLY ORIENTED ALONG THE NORTHCENTRAL AND NORTHWESTERN GULF COASTS THIS EVENING WILL BECOME REORIENTED TO ACROSS NORTHERN AND CENTRAL FLORIDA BY DAYBREAK.
HIGH PRESSURE ALOFT WILL BECOME ESTABLISHED ACROSS THE WESTERN STATES FOR THE LATTER HALF OF THE WEEK.
600 PM CST SUN JAN 18 2015 WEAK HIGH PRESSURE RIDGE AXIS WILL BE OVER IOWA TONIGHT WITH LIGHT AND VARIABLE WINDS DEVELOPING BY THIS EVENING.
906 PM EST SUN JAN 18 2015 HIGH PRESSURE WILL BUILD INTO THE REGION ON MONDAY.
CURRENT SURFACE ANALYSIS PLACES DEVELOPING LOW OVER SOUTHERN ALBERTA WITH RIDGE OVER THE UPPER MIDWEST. MAIN CONCERN WITH THIS SYSTEM IS THE FREEZING RAIN POTENTIAL WITH TEMPERATURES WARMING ALOFT AHEAD OF APPROACHING LOW. THIS WILL COOL THE UPPER ATMOSPHERE ENDING THE FREEZING RAIN THREAT.
AN UPR TROF WL CONT TO ADVANCE ACRS THE RGN THIS EVE BRINGING SCT SNW SHOWERS. UPSLOPE FLOW IS EXPD TO KICK IN LTR THIS EVE ALSO WITH MORE NMRS SNW SHOWERS IN THE RIDGES SE OF PIT.
934 PM EST SUN JAN 18 2015 A COLD FRONT OVER THE NORTHERN GREAT LAKES WILL BECOME STATIONARY NEAR LAKE ERIE LATE MONDAY.
Surface data over the last couple of hours shows that high pressure is moving into the region and as of 02 UTC appears to be centered about near Pensacola. As this high moves further eastward overnight, expect winds to decrease further. Model guidance earlier this evening had trended cooler, so it would not be surprising at all to see a few spots drop below freezing by daybreak given that Tallahassee and Valdosta are already around 40 degrees at 9 pm ET.
201 PM PST SUN JAN 18 2015 HIGH PRESSURE WILL BUILD OVER THE EASTERN PACIFIC. DRY CONDITIONS MAY PERSIST THROUGH LATE IN THE MONTH AS HIGH PRESSURE REMAINS NEAR THE WEST COAST. WINDS GUSTS UP TO 35 MPH WILL ALSO DIMINISH THIS EVENING AS HIGH PRESSURE STARTS TO BUILD ALONG THE WEST COAST.
OVERNIGHT SOME MODELS HINT AT AN EXPANSION OF THE LOWER CLOUDS BACK TO THE SOUTHWEST.
404 PM CST SUN JAN 18 2015 CURRENT SURFACE ANALYSIS PLACES DEVELOPING LOW OVER SOUTHERN ALBERTA WITH RIDGE OVER THE UPPER MIDWEST. MAIN CONCERN WITH THIS SYSTEM IS THE FREEZING RAIN POTENTIAL WITH TEMPERATURES WARMING ALOFT AHEAD OF APPROACHING LOW. THIS WILL COOL THE UPPER ATMOSPHERE ENDING THE FREEZING RAIN THREAT.
BUT THE MORE OPEN AREAS AND RIDGES ARE FAIRLY CLOSE IN TEMPERATURES CURRENTLY. 23Z SFC ANALYSIS SHOW LOW PRESSURE MOVING AWAY FROM THE AREA AS HIGH PRESSURE SLIDES BY TO THE SOUTH. THIS HIGH IS HELPING TO CLEAR THE SKY AND SETTLE THE BREEZY WEST WINDS. TEMPERATURES ARE FAIRLY UNIFORM ACROSS THE AREA IN THE LOW TO MID 40S. THOUGH RIDGES WILL LIKELY STAY A BIT COOLER DUE TO THE EARLIER AND CONTINUING WEAK CAA. A VERY WEAK AND DISSIPATING WAVE OF LOW PRESSURE WILL MOVE THROUGH THE OHIO VALLEY MONDAY INTO MONDAY NIGHT AHEAD OF AN APPROACHING CLIPPER SYSTEM.
TREND APPEARS TO BE FOR A LONG WAVE RIDGE TO TRY TO REMAIN ALONG THE WEST COAST. AS A SERIES OF WEAK SYSTEMS RIDE ACROSS THE TOP OF THE RIDGE THU THROUGH SAT. BOTH GFS AND ECMWF REBUILD THE RIDGE STRONG ENOUGH SUN TO SUGGEST A RETURN TO DRY WEATHER WITH FOG AND LOW CLOUDS AGAIN BECOMING LIKELY IN THE INLAND VALLEYS. HAVE BEEN SEEING VERY OCCASIONAL MFR CIGS AROUND 025 THIS AFTERNOON BUT THE LOW PREDICTABILITY AND VERY INFREQUENT NATURE DOES NOT LEND TO INCLUDING BKN GROUPS IN THE TAFS AT THIS HOUR. HIGH PRESSURE ALOFT BEGINS BUILDING TONIGHT AND EXPECT SHOWERS TO SLOWLY DWINDLE AWAY HEADING TOWARD 18Z MONDAY. HIGH PRESSURE WILL THEN BUILD OVER THE REGION WITH OFFSHORE FLOW DEVELOPING BY MONDAY THEN BECOMING NORTHERLY TOWARD MID WEEK.
WE MIGHT BE RUNNING A TAD COOLER THAN PROJECTED WITH CLEAR SKIES AND CALM WINDS. SO MAY BUMP DOWN A FEW OF THE LOWS BY A DEGREE. VFR FORECAST FOR TERMINALS AS HIGH PRESSURE SETTLES IN ACROSS THE GULF COAST STATES BEHIND A FRONT.
GUSTY WINDS AND CONSIDERABLE CLOUD COVER AT TIMES WILL HELP TO HOLD TEMPERATURES UP OVERNIGHT WITH MOST LOCATIONS AT OR JUST ABOVE FREEZING BY MONDAY MORNING.
843 PM EST SUN JAN 18 2015 CURRENTLY HIGH PRESSURE IS CENTERED OVER THE NORTHWESTERN GULF OF MEXICO WITH A COLD FRONT WELL TO THE SOUTH ACROSS THE BAHAMAS AND CUBA. HIGH PRESSURE WILL CONTINUE TO BUILD IN FROM THE WEST OVERNIGHT ALLOWING WEST NORTHWESTERLY WINDS TO BECOME LIGHT. WINDS WILL CONTINUE TO DECREASE OVER THE COASTAL WATERS TO BELOW SCA CRITERIA FOR THE OFFSHORE WATERS AS HIGH PRESSURE BUILDS IN FROM THE EAST.
Hourly forecast temperatures were running a little warmer than observations, thus have made some minor changes with the overnight minimums. The typical colder spots in our CWA will probably see overnight temps fall into the lower-mid 20s with the remainder seeing upper 20s. With temperatures expected to be subfreezing, there is potential for some slick spots on area roadways due to freezing fog.
638 PM EST SUN JAN 18 2015 IT WILL BE BREEZY BEHIND A COLD FRONT INTO THE EVENING.
917 PM EST SUN JAN 18 2015 HIGH PRESSURE BUILDS ACROSS THE SOUTHEAST STATES TONIGHT THROUGH MONDAY.
WINDS WILL REMAIN LIGHT OUT OF THE NW OVERNIGHT THEN VEER TOWARD THE EAST AS HIGH PRESSURE BUILDS OVER THE REGION MONDAY. SECONDARY BOUNDARY ASSOCIATED WITH THE TROUGH AND LEADING EDGE OF THE COOLER AIR WAS ACROSS CENTRAL FLORIDA. TEMPERATURES WERE IN THE LOW 70S NORTHWEST TO THE UPPER 70S SOUTHEAST. UPPER TROUGH OVER THE SOUTHEAST WILL LIFT TO THE EAST NORTHEAST OVERNIGHT. HIGH PRESSURE WILL SETTLE ACROSS NORTHERN FLORIDA ON MONDAY AND THEN INTO THE WESTERN ATLANTIC MONDAY NIGHT. HIGHS WILL WARM INTO THE LOW/MID 70S AND LOWS WILL BE MAINLY IN THE 50S TO LOW 60S.
842 PM EST SUN JAN 18 2015 UPDATE A COLD FRONT WILL DROP SOUTH THROUGH LOWER MICHIGAN TONIGHT BRINGING LIGHT SNOW SHOWERS BUT LITTLE IF ANY ACCUMULATION.
/ISSUED 653 PM CST SUN JAN 18 2015/ CENTER OF HIGH PRESSURE IS SOUTHEAST OF GALVESTON LEADING TO LIGHT SOUTH/SOUTHEAST FLOW.
725 PM EST SUN JAN 18 2015 23Z SFC ANALYSIS SHOW LOW PRESSURE MOVING AWAY FROM THE AREA AS HIGH PRESSURE SLIDES BY TO THE SOUTH. THIS HIGH IS HELPING TO CLEAR THE SKY AND SETTLE THE BREEZY WEST WINDS. TEMPERATURES ARE FAIRLY UNIFORM ACROSS THE AREA IN THE LOW TO MID 40S. THOUGH RIDGES WILL LIKELY STAY A BIT COOLER DUE TO THE EARLIER AND CONTINUING WEAK CAA. A VERY WEAK AND DISSIPATING WAVE OF LOW PRESSURE WILL MOVE THROUGH THE OHIO VALLEY MONDAY INTO MONDAY NIGHT AHEAD OF AN APPROACHING CLIPPER SYSTEM.
ALLOWING MANY PORTIONS OF THE AREA TO EXPERIENCE A COOLER EVENING. SOME AREAS OF THE NATURE COAST COULD SEE TEMPERATURES DIP NEAR FREEZING. HIGH PRESSURE MOVES INTO THE REGION BEHIND A COLD FRONT PRODUCING NORTHWEST THROUGH NORTHEAST WINDS 10 TO 15 KNOTS. WINDS WILL DECREASE BY MONDAY AFTERNOON AS HIGH PRESSURE SETTLES IN OVER THE REGION.
A RIDGE OF HIGH PRESSURE ACROSS ILLINOIS AND LOWER OHIO VALLEY WILL MOVE EAST ACROSS OUR REGION LATE TONIGHT.
613 PM EST SUN JAN 18 2015 AVIATION A COLD FRONT WILL DROP SOUTH THROUGH LOWER MICHIGAN TONIGHT BRINGING LIGHT SNOW SHOWERS BUT LITTLE IF ANY ACCUMULATION.
WILL KEEP THE PRECIPITATION MENTION AS LIGHT FREEZING RAIN.
/ISSUED 210 PM CST Sun Jan 18 2015/ Quiet weather will continue into midweek before another storm system and cold front bring active weather back to the region.
Will continue the high wind warning for this area and also farther east over the U. Will also continue the high wind warning for Fergus and Blaine Counties. do not have high enough confidence that they will not reach the criteria to drop the high wind warning so will continue the high wind warning the rest of tonight. Elsewhere will cancel the high wind warning. As for other changes lowered sky cover over most of the lower elevations for the rest of this evening and in some areas also after midnight.
AN UPPER LEVEL TROUGH AND ATTENDANT COLD FRONT WILL PROGRESS EASTWARD ACROSS THE AREA THIS AFTERNOON. MILD HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE SOUTHWEST TONIGHT AND MONDAY. COLD FRONT CONTINUES TO PUSH THROUGH EASTERN NORTH CAROLINA AND DRY AIR CONTINUES TO FILTER IN FROM THE WEST AS LOW PRESSURE EXITS TO THE NORTHEAST. UPPER LEVEL FLOW WILL BECOME MORE ZONAL AND SURFACE RIDGING WILL EXTEND NORTHWARD FROM THE NORTHERN GULF COAST OVERNIGHT. OTHERWISE EXPECT LOWS IN THE LOW TO MID 30S NW TO SE. UPPER FLOW PATTERN TRANSITIONS TO QUASI-ZONAL FLOW IN THE WAKE OF THE DEEPENING UPPER TROUGH LIFTING NEWD ACROSS NORTHERN NEW ENGLAND AND SOUTHERN QUEBEC. LOWS MONDAY NIGHT IN THE LOWER TO MID 30S.
HIGH PRESSURE ALONG WITH A DRY ATMOSPHERE WILL PROVIDE VFR CONDITIONS FOR BOTH KMSL/KHSV THRU THE FCST PERIOD. 07 /ISSUED 314 PM CST SUN JAN 18 2015/ A PACIFIC IN ORIGIN AREA OF HIGH PRESSURE CENTERED OVER THE SOUTHERN PLAINS AT 20Z WAS PROVIDING SUNNY SKIES AND MORE MODERATE TEMPS INTO THE MID TO UPPER 50S ACROSS THE FORECAST AREA.
CHATTANOOGA AIRPORT, TN 35 58 36 58 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 35 55 35 56 / 0 0 0 0 OAK RIDGE, TN 34 54 36 55 / 0 0 0 0 TRI CITIES AIRPORT, TN 31 50 32 53 / 0 0 0 0.
527 PM CST SUN JAN 18 2015 MAIN CONCERN LOOKS TO BE TIMING AND STRENGTH OF SERIES OF SHORT WAVE TROUGHS AS UPPER FLOW AMPLIFIES DURING THE PERIOD. QUASI ZONAL FLOW EARLY IN THE PERIOD BECOMES MORE AMPLIFIED DURING THE PERIOD WITH NUMEROUS SHORT WAVE TROUGHS MOVING ACROSS THE REGION AND PULLING DOWN COLDER AIR AS THEY PASS.
646 PM EST SUN JAN 18 2015 HIGH PRESSURE WILL BUILD INTO THE REGION ON MONDAY.
HIGH PRESSURE ON THE TX COASTAL BEND EXTENDS OVER ALONG THE LA COAST. CURRENTLY FORECAST LOWS ARE CLOSER TO NAM THAN THE WARMER MAV.
AFTERWARDS HIGH PRESSURE WILL STRENGTHEN A BIT TO BRING DRY WEATHER FOR THE REMAINDER OF THE WORK WEEK.
558 PM CST SUN JAN 18 2015 A COLD FRONT WAS MOVING THROUGH THE SOUTHERN PERIPHERY OF THE FA AT 20Z. THE COLD FRONT WILL EXIT THE FA THIS EVENING AND UPPER LEVEL RIDGING ARRIVES.
500 PM CST SUN JAN 18 2015 FOR 00Z TAFS /ISSUED 314 PM CST SUN JAN 18 2015/ A PACIFIC IN ORIGIN AREA OF HIGH PRESSURE CENTERED OVER THE SOUTHERN PLAINS AT 20Z WAS PROVIDING SUNNY SKIES AND MORE MODERATE TEMPS INTO THE MID TO UPPER 50S ACROSS THE FORECAST AREA.
PRIMARILY LIGHT SOUTHWEST WIND WILL SWITCH TO LIGHT NORTHERLY FIRST 12 HOURS OF TAF PERIOD AS WEAK COLD FRONT PASSES OVER REGION.
HIGH PRESSURE ALOFT WILL WEAKEN SLIGHTLY TONIGHT INTO MONDAY AS AN UPPER LOW CROSSES THE PACIFIC NORTHWEST.
WITH SOME AREAS NEAR 50 OUT WEST AND AREAS AT FREEZING IN THE EAST. WITH DRIER AIR IN PLACE FROM TODAY AND DEW POINTS IN THE LOW TO MID 20S. TEMPERATURES MAY CONTINUE TO FALL INTO THE UPPER 20S FOR COOLER AREAS NEAR THE PLATEAU.
653 PM CST SUN JAN 18 2015 CENTER OF HIGH PRESSURE IS SOUTHEAST OF GALVESTON LEADING TO LIGHT SOUTH/SOUTHEAST FLOW.
LET THE HIGH WIND WARNING EXPIRE ON TIME AS A RESULT.
645 PM EST SUN JAN 18 2015 A COLD FRONT OVER THE NORTHERN GREAT LAKES WILL BECOME STATIONARY NEAR LAKE ERIE LATE MONDAY.
THIS RESULTS IN HIGHS NEAR THE LOWER 40S NORTH TO AROUND 50 SOUTH.
AND NOT EXPECTING ANY FREEZING RAIN. THERMAL PROFILES WILL START BELOW FREEZING. WITH PERHAPS A LITTLE LIGHT FREEZING RAIN ON THE SOUTHERN EXTENT OF THE PRECIP AS THE WARM AIR MOVES IN ALOFT. A BIT MORE VERY LIGHT FREEZING RAIN/SLEET IS POSSIBLE. THE COOLER TEMP PROFILES WILL BE FARTHER NORTHEAST.
430 AM CDT Sat Mar 21 2015 Saturday - Sunday: A pretty nice weekend is in store despite a weak cold front dropping south through northern and central MO today. Inspection of progged soundings shows the low-level warm nose will still be present today but the vertical stratification of the boundary layer winds will likely not support deep mixing. Sunday still looks like the warmest day as warm air advection noses east towards the western CWA and think we should be able to warm into the lower 70s. The northeastern counties won't see this warming as an easterly wind will likely hold temperatures in the lower 60s.
237 AM EDT SAT MAR 21 2015 LOW PRESSURE APPROACHING FROM THE WEST TODAY WILL PUSH INTO NORTHERN NEW ENGLAND BY THIS EVENING AND WILL DRIVE AN ARCTIC COLD FRONT THROUGH THE REGION.
DRY AND WARM SPRING WEATHER IS FORECAST THROUGH THE REST OF THE WEEKEND WITH HIGH TEMPERATURES RUNNING ABOUT 10 DEGREES WARMER THAN AVERAGE.