Aikyam-Lab/Synoptic-Bench huggingface dataset:
A COOLER DAY AHEAD TODAY AS LLVL THERMAL TROF IS LEFT BEHIND AFTER YESTERDAYS COLD FROPA.
NORTH WINDS WILL INCREASE MARKEDLY THIS MORNING BEHIND A COLD FRONT AND WILL REMAIN THAT WAY THROUGH MID AFTERNOON BEFORE DIMINISHING. /ISSUED 430 AM CST WED FEB 11 2015/ THE COLD FRONT THAT PUSHED THROUGH THE AREA YESTERDAY IS CURRENTLY STRETCHED FROM CENTRAL TEXAS TO SOUTHERN OKLAHOMA. WHERE HIGHS IN THE UPPER 40S TO THE LOWER 50S ARE EXPECTED. AN UPPER-LEVEL TROUGH OVER THE FOUR CORNERS REGION THIS MORNING WILL CONTINUE TO DIVE SOUTHWARD TODAY BEFORE PINCHING OFF INTO AN UPPER LOW THAT IS FORECAST TO RETROGRADE INTO WESTERN OLD MEXICO THURSDAY NIGHT. WHILE ANY CONTRIBUTION FROM THIS UPPER LOW TO PRECIP DEVELOPMENT IS MODEST.
EXPECT A MOSTLY CLEAR SKY TO DEVELOP AS THE HIGH APPROACHES THIS AFTERNOON AND TONIGHT. THE MEDIUM RANGE MODELS CAUGHT UP WITH THE ECMWF AND ARE NOW FORECASTING SNOW DEVELOPING AHEAD OF A WARM FRONT OVER WESTERN AND CENTRAL NORTH DAKOTA THURSDAY.
FURTHER NORTH THE COOLER AIR IS HAVING A HARD TIME SEEPING IN AS THE PRESSURE SURGE OUTRAN THE LOW LEVEL TEMPERATURE GRADIENT. I DID PUT IN A BIT MORE CLEARING LATER THIS AFTERNOON AND EVENING WITH SLIGHTLY WARMER HIGHS IN THE MOUNTAINS. AND A BIT COOLER LOWS TONIGHT ON THE PLAINS. UPPER LEVEL RIDGE OVER THE WESTERN U.
HIGH PRESSURE RIDGE OVER THE REGION WILL CONTINUE TO SLIDE EAST OFF THE EASTERN SEABOARD THROUGH 00Z THU. THIS RIDGE WILL KEEP WINDS FAIRLY CALM TODAY WITH AFTERNOON TEMPS SEVERAL DEGREES ABOVE SEASONAL NORMS. MAIN LOW PRESSURE SYSTEM IN THE GREAT LAKES REGION WILL MOVE EAST TODAY WITH ITS TRAILING DRY COLD FRONT DIPPING SOUTH TOWARD THE OHIO VALLEY TONIGHT INTO THURSDAY.
FREEZING FOG LIKELY ALONG THE CUMBERLAND PLATEAU FOR NEXT 2 TO 3 HOURS. VISIBILITIES ARE DOWN TO ZERO IN FREZZING FOG AT CROSSVILLE AIRPORT WITH TEMPERATURE BELOW FREEZING. MOTORISTS NEED TO EXERCISE CAUTION ON THE APPROACH TO BRIDGES AND OVERPASSES.
1038 AM EST WED FEB 11 2015 HIGH PRESSURE RIDGING INTO STATE FROM THE NORTH ON BACKSIDE OF AN ATL STORM SYSTEM WILL DOMINATE THE WEATHER TODAY AND PRODUCE CHAMBER OF COMMERCE WEATHER. HIGH PRESSURE TO THE NORTH WILL PRODUCE NORTHEAST WINDS LESS THAN 15 KNOTS THROUGH THURSDAY THEN BACKING TO THE NORTHWEST.
ARCTIC COLD FRONT CURRENTLY DOWN THROUGH NORTHERN MISSOURI WILL WORK THIS WAY DURING THE DAY AND BEGIN INCREASING CLOUDS DURING THE AFTERNOON WITH SKIES BECOMING CLOUDY BY EVENING.
A CANADIAN COLD FRONT EXTENDED FROM IRON RIVER MICHIGAN TO KANSAS CITY MISSOURI. HOWEVER THE KARX DUAL POLE RADAR IS INDICATING FREEZING DRIZZLE ON BOTH THE CC AND ZDR RADAR PRODUCTS. WENT OUTSIDE A COUPLE MINUTES AGO TO CHECK AND IT WAS INDEED FREEZING DRIZZLE. AND THIS IS PREVENTING THE ICE IN THE CLOUDS THAT THE SATELLITE IS SHOWING FROM REACHING THE LOW LEVEL MOISTURE WHICH IS MAINLY ABOVE -7C. EXPECT THE FREEZING DRIZZLE TO CHANGE OVER TO SNOW FLURRIES AS IT ENDS. THE COMBINATION OF SUBSIDENCE AND WEAK ANTICYCLONIC FLOW AHEAD OF A RATHER VIGOROUS SHORT WAVE TROUGH WILL CAUSE SKIES TO CLEAR. WITH SOME SHORT WAVE RIDGING AHEAD OF THE NEXT SYSTEM. A VIGOROUS SHORT WAVE TROUGH WILL MOVE QUICKLY SOUTH THROUGH THE UPPER MISSISSIPPI RIVER VALLEY. IN THE VICINITY AND BEHIND THE COLD FRONT.
1043 AM EST WED FEB 11 2015 SKIES ARE PARTLY CLOUDY ACROSS THE LOWER KEYS AND WESTWARD WITH A PATCHY DENSE LOW LEVEL CUMULUS DECK. TEMPERATURES ARE ONLY SLOWLY RISING THROUGH THE LOWER TO MID 60S ACROSS THE ISLANDS AT THIS TIME.
1010 AM EST WED FEB 11 2015 WELL DEVELOPED GALE OFF THE MID ATLANTIC COAST COMBINING WITH A HI PRES RIDGE OVER THE GOMEX/DEEP SOUTH TO GENERATE A DEEP AND STEADY NRLY BREEZE ACRS CENTRAL FL THIS MRNG.
430 AM CST WED FEB 11 2015 THE COLD FRONT THAT PUSHED THROUGH THE AREA YESTERDAY IS CURRENTLY STRETCHED FROM CENTRAL TEXAS TO SOUTHERN OKLAHOMA. WHERE HIGHS IN THE UPPER 40S TO THE LOWER 50S ARE EXPECTED. AN UPPER-LEVEL TROUGH OVER THE FOUR CORNERS REGION THIS MORNING WILL CONTINUE TO DIVE SOUTHWARD TODAY BEFORE PINCHING OFF INTO AN UPPER LOW THAT IS FORECAST TO RETROGRADE INTO WESTERN OLD MEXICO THURSDAY NIGHT. WHILE ANY CONTRIBUTION FROM THIS UPPER LOW TO PRECIP DEVELOPMENT IS MODEST.
550 AM CST WED FEB 11 2015 COMBINATION OF SATL PIX/SFC OBS SHOWING EXTENSIVE LLVL CLOUD COVER MOVING ALONG WITH A COLD FRONT WITH THE LEADING EDGE OF THE BNDRY EXTENDING FROM ABOUT SRN IA TO NW KS.
502 AM EST WED FEB 11 2015 HIGH PRESSURE WILL CROSS THE REGION TODAY. LOW PRESSURE WILL APPROACH FROM THE WEST THURSDAY WHILE A SECONDARY LOW DEVELOPS ALONG THE MID ATLANTIC COAST.
A COLD FRONT WILL MOVE THROUGH THE REGION TODAY LEADING TO INCREASING. /ISSUED 339 AM CST WED FEB 11 2015/ COLD FRONT WILL MOVE INTO NORTHEAST OKLAHOMA THIS MORNING.
CHATTANOOGA AIRPORT, TN 57 32 37 18 / 0 10 10 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 54 30 35 16 / 0 10 20 0 OAK RIDGE, TN 54 28 35 16 / 0 20 20 0 TRI CITIES AIRPORT, TN 52 30 34 13 / 0 20 50 20.
THE MAIN RESULT WILL BE COOLER TEMPERATURES TODAY INTO THURSDAY.
HIGH TEMPS WERE ON TRACK TO WARM INTO THE LOW/MID 60S INLAND TO NEAR 60 ALONG THE COAST.
HOWEVER ANOTHER COLD FRONT WILL BACKDOOR INTO THE FORECAST AREA LATE. RIDGE AXIS MOVES EAST OF AREA BY FRI WITH LIGHT DOWNSLOPE FLOW. WITH TEMPERATURES LIKELY AT OR BELOW FREEZING OVER MUCH OF THE AREA. COULD SEE ENOUGH FREEZING RAIN TO CAUSE PROBLEMS. WHICH WOULD INCREASE CHANCES FOR FREEZING PRECIPITATION. THE BETTER CHANCES OF SIGNIFICANT FREEZING RAIN AT THIS POINT ARE SOUTH OF HIGHWAY 400. A COLD FRONT HAS MOVED THROUGH THE REGION AND GUSTY NORTHERLY WINDS WILL BE PRESENT THROUGHOUT THE DAY BEFORE DIMINISHING OVERNIGHT.
WARMER THAN NORMAL TEMPERATURES ARE EXPECTED TODAY AND TONIGHT THEN TURNING MUCH COLDER THURSDAY AND THURSDAY NIGHT. EARLY MORNING SURFACE ANALYSIS HAD A RIDGE AXIS JUST TO THE NORTHWEST OF OUR CWA. THIS RIDGE WILL WEAKEN OVER OUR CWA TODAY. THE CLOSED LOW WILL DROP SOUTH OVER THE DESERT SOUTHWEST TODAY AND HELP BRING A FEW HIGH AND MID CLOUDS OUR WAY. THE WEAK DRY COLD FRONT WILL DROP INTO OUR NORTHWEST ZONES AROUND MIDNIGHT TONIGHT AND DRIFT THROUGH OUR CWA THURSDAY MORNING.
Next in a series of cold fronts making its way southward toward the CWA at this hour. Evening hours bring a break in the winds and the clouds, however secondary cold front advances southward across the area after midnight and brings in even colder temperatures in the teens. Still appears temps may be rather steady or slowly rise late Thursday night as warm air surges back east ahead of next strong upper wave rotating around the persistent upper level trough in the east.
HIGHS WILL BE COOLER TODAY WITH GOOD COLD AIR ADVECTION AS 850 MB TEMPS FALL TO AROUND ZERO TO 2 CELSIUS. A RIDGE/TROUGH PATTERN WILL BE IN PLACE FOR THE REMAINDER OF THE WEEK AND INTO THE WEEKEND PLACING WESTERN KANSAS UNDER NORTHWEST FLOW ALOFT. AS THIS TROUGH APPROACHES, LEE TROUGHING WILL DEVELOP ACROSS EASTERN COLORADO LEADING TO SOUTH TO SOUTHWEST WINDS ACROSS THE FORECAST AREA THURSDAY INTO THURSDAY NIGHT. HIGHS THURSDAY WILL RANGE FROM THE LOWER 40S ACROSS CENTRAL KANSAS TO AROUND 60 DEGREES ACROSS THE KS CO BORDER.
THIS COLD FRONT WILL PUSH SOUTHWARD TODAY SHIFTING OUR WINDS FROM EAST TO NORTHEAST AND BRISK NORTH DURING THE OVERNIGHT. IT WILL BE WARMER TODAY IS MUCH OF THE AREA WITH A SPOT OR TWO MAYBE NOT AS WARM DUE TO CLOUDS AND PERHAPS A TOUCH OF FOGGY STRATUS.
A COLD FRONT WILL BEGIN TO SEEP S INTO NE TX/SE OK BY LATE AFTERNOON. THIS COLD FRONT WILL PUSH SOUTHWARD TODAY SHIFTING OUR WINDS FROM EAST TO NORTHEAST AND BRISK NORTH DURING THE OVERNIGHT. IT WILL BE WARMER TODAY IS MUCH OF THE AREA WITH A SPOT OR TWO MAYBE NOT AS WARM DUE TO CLOUDS AND PERHAPS A TOUCH OF FOGGY STRATUS.
230 AM PST WED FEB 11 2015 HIGH PRESSURE OVER CALIFORNIA WILL KEEP DRY CONDITIONS ACROSS THE REGION THROUGH THE REMAINDER OF THE WEEK AND INTO THE WEEKEND. INDICATING REDUCED VISIBILITIES ALONG THE HIGHWAY 99 CORRIDOR. AN UPPER-LEVEL RIDGE WAS OVER CALIFORNIA THIS MORNING. THE RIDGE WILL BRING WARMING ABOVE THE FOG/STRATUS DECK. TEMPERATURES FOR THE LOWER ELEVATIONS WILL BE HARDER TO FORECAST BECAUSE OF UNCERTAINTIES AS TO IF.
UPPER AIR ANALYSIS LAST EVENING SHOWED A BROAD LOW AMPLITUDE RIDGE ACROSS THE MIDDLE OF THE COUNTRY WITH A TROUGH OVER THE WEST. TEMPERATURES WILL BE COOLER BEHIND THE FRONT THURSDAY.
SUBJECTIVE SURFACE ANALYSIS AT 3 AM SHOWED A COLD FRONT STRETCHING FROM SOUTHEASTERN NEW MEXICO TO NEAR WICHITA FALLS AND INTO EASTERN TEXAS. A BRIEF ROUND OF RADIATION FOG MAY BE POSSIBLE AGAIN TONIGHT ALONG THE COAST BUT WILL END QUICKLY AS WINDS INCREASE AND DRIER AIR IS USHERED IN BEHIND THE COLD FRONT.
603 AM EST WED FEB 11 2015 HIGH PRESSURE WILL CROSS THE REGION TODAY. LOW PRESSURE WILL APPROACH FROM THE WEST THURSDAY WHILE A SECONDARY LOW DEVELOPS ALONG THE MID ATLANTIC COAST.
308 AM MST WED FEB 11 2015 NORTH TO SOUTH ORIENTED UPPER JET OVER WRN UT CONTINUES TO DIG A TROUGH SOUTHWARD ACROSS WRN CO EARLY THIS MORNING. WILL KEEP THE HIGHEST POPS ACROSS THE SAN JUANS AFTER SUNRISE THROUGH MORNING. TEMPS A BIT COOLER TODAY IN WEAK COLD ADVECTION. MODELS SHOW THE TROUGH AXIS DROPPING SOUTH OF THE 4 CORNERS BY NOON AS THE UPPER LOW SINKS INTO WRN NM. HIGH PRESSURE BUILDS INTO NE UT/NW CO. HIGH PRESSURE BECOMES THE DOMINANT FEATURE TONIGHT AND THURSDAY AS THE UPPER LOW MOVES TOWARDS THE SOUTHWEST AND INTO NORTHWESTERN OLD MEXICO.
930 AM EST SUN JAN 25 2015 A QUICK MOVING AREA OF LOW PRESSURE WILL DIVE SOUTHEAST.
532 AM EST SUN JAN 25 2015 MVFR STRATUS IS FORECAST TO REMAIN FIRMLY IN PLACE THROUGH AT LEAST THE MORNING HOURS AS COLD NNE FLOW BUILDS IN BEHIND THIS MORNING'S COLD FRONT. DRY ADVECTION AROUND HIGH PRESSURE BUILDING INTO ONTARIO WILL FAVOR AN EAST-TO- WEST CLEARING OF LOW CLOUDS THIS AFTN THRU THIS EVENING. TODAY THROUGH TONIGHT THE SHORT TERM PERIOD WILL BE DOMINATED BY THE INFLUENCE OF HIGH PRESSURE CURRENTLY CENTERED BENEATH AN AREA OF CONFLUENT FLOW ALOFT AND CENTERED OVER FAR NORTHWEST ONTARIO. NORTHEAST WINDS AROUND THE PERIPHERY OF THIS HIGH HAVE BEGUN TO FILL INTO SOUTHEAST MICHIGAN BEHIND THE COLD FRONT THAT IS MAKING ITS WAY THROUGH THE CWA. LOW-LEVEL DRY ADVECTION WILL INCREASE MARKEDLY THIS AFTERNOON INTO THIS EVENING AS HIGH PRESSURE BUILDS INTO ONTARIO.
A WEAK COLD FRONT WILL INCREASE WINDS BY 18Z WITH DECREASING TRENDS EXPECTED BY THE EVENING. A WEAK COLD FRONT WILL PASS THROUGH THE AREA TODAY. BUT NOT MUCH CHANGE OTHER THAN BREEZY AND SLIGHTLY DRIER AIR AS WEAK HIGH PRESSURE BUILDS IN BEHIND THE FRONT.
HIGH PRESSURE SHOULD BRING PARTIAL SUNSHINE TO THE NORTHLAND TODAY. THE HIGH RESOLUTION DULUTH WRF RUN INDICATES THERE MAY BE A FEW BANDS OF LOCALLY HEAVIER SNOW SHOWERS DURING THE DAY. COULD EVEN SEE SOME LOCALLY HIGHER AMOUNTS ALONG THE HIGHER TERRAIN ADJACENT TO LAKE SUPERIOR ON THE NORTH SHORE.
HIGH PRESSURE WILL BUILD IN TONIGHT WHICH IN CONJUNCTION WITH NE WINDS WILL ALLOW SKIES TO BECOME PARTLY CLOUDY TO MOSTLY CLEAR.
A BEAUTIFUL DAY IS ON TAP FOR TODAY WITH SUNNY SKIES AND TEMPS RISING INTO THE LOW TO MID 60S THIS AFTERNOON. DRY HIGH PRESSURE WILL BE REINFORCED AS AN UPPER SHORT WAVE FORCES ANOTHER FRONT THROUGH THE AREA TONIGHT.
/ISSUED 324 AM CST SUN JAN 25 2015/ IMPRESSIVE VORT MAX SPIRALING SOUTHEAST OVER EASTERN KS THIS MORNING WILL PUSH A WEAK COLD FRONT THROUGH MUCH OF THE CWA BEFORE DAYBREAK AHEAD OF GUSTY NORTH WINDS. MILD SURFACE RIDGING THEN OVERSPREADS MUCH OF WEST TX TONIGHT FROM NEW MEXICO COMPLETE WITH LIGHT WEST WINDS AND CLEAR SKIES. DRY AIR AND MILD PATTERN WILL PREVAIL AT LEAST THROUGH MID WEEK AS HIGH AMPLITUDE RIDGE BECOMES ELONGATED FROM THE NORTHERN ROCKIES S/SE THROUGH THE SOUTHERN PLAINS.
TODAY AND TONIGHT A COLD FRONT THAT PUSHED THROUGH THE TEXAS/OKLAHOMA PANHANDLES LAST NIGHT WILL CONTINUE TO MOVE SOUTHWARD TODAY. HIGH TEMPERATURES WILL BE A LITTLE WARMER TODAY DUE TO THE DIMINISHING SNOW COVER.
/ISSUED 321 AM CST SUN JAN 25 2015/ COLD FRONT CURRENTLY ENTERING OSAGE COUNTY WILL SWEEP ACROSS THE AREA TODAY. BRINGING GUSTY NWLY WINDS AND COOLER TEMPERATURES. THE COOLER WEATHER WILL ONLY LAST A DAY.
539 AM CST SUN JAN 25 2015 COLD FRONT WILL MOVE THROUGH THE REGION TODAY.
932 AM EST SUN JAN 25 2015 WEAK HIGH PRESSURE WILL BE IN CONTROL TODAY WITH THE NEXT FAST MOVING LOW PRESSURE SYSTEM CROSSING THE REGION TONIGHT AND MONDAY WITH A SLIGHT CHANCE SHOWERS.
THE RELATIVELY WARM WATERS NORTH OF THE LOWER KEYS TEMPERED THE COLD AIR ADVECTION. INCLUDING THE WESTERN HALF OF THE LOWER KEYS. A RIDGE OF HIGH PRESSURE WILL STRETCH ACROSS THE COASTAL WATERS OF THE FLORIDA KEYS THIS AFTERNOON. A REINFORCING COLD FRONT WILL APPROACH THE FLORIDA KEYS TONIGHT AND MONDAY. HIGH PRESSURE WILL BUILD INTO THE WESTERN NORTH ATLANTIC.
THE COOL FRONT IS EXPECTED TO CROSS THE AREA WITH LITTLE FANFARE OTHER THAN A WIND SHIFT AND SLIGHTLY DRIER/COOLER AIR LATER THIS AFTERNOON AND EVENING. WITH YET ANOTHER CDFNT FCST TO BRING COOLER TEMPERATURES THU NIGHT INTO THE WEEKEND. GENERALLY WITH REGARD TO ENERGY DROPPING OUT OF CANADA AS THERE IS GOOD CONSENSUS ON THE MEAN PATTERN OF A CUT OFF LOW DEVELOPING WEST OF THE BAJA WITH DOWNSTREAM RIDGING OVER TX AND A MEAN ERN CONUS TROF. 13 A LOW PRESSURE SYSTEM MOVING THROUGH THE MID MISSISSIPPI RIVER VALLEY WILL RESULT IN INCREASING WEST WINDS ACROSS THE COASTAL WATERS TODAY. THIS LOW WILL DRAG A COLD FRONT THROUGH THE COASTAL WATERS THIS EVENING.
600 AM EST SUN JAN 25 2015 COLD/STRONG CANADIAN HIGH PRESSURE REMAINS CENTERED NORTH OF MINNESOTA EARLY THIS MORNING. WHILE LOW PRESSURE CHURNS ITS WAY THRU THE UPPER MISSISSIPPI VALLEY. MUCH OF MICHIGAN REMAINS UNDER THE STRENGTHEN RIDGE AXIS ASSOCIATED WITH HIGH PRESSURE TO OUR NW. STRONG HIGH PRESSURE. STRONG COLD HIGH PRESSURE WILL MOVE OVERHEAD TONIGHT.
Highs this afternoon will range from the lower 60s across our northern counties, to the upper 60s along the Interstate 10 corridor. Overnight lows are expected to range from near 30 in the low- lying areas and river valleys of our central and southern counties, to the mid/upper 30s across the Big Country.
629 AM EST SUN JAN 25 2015 WEAK HIGH PRESSURE WILL BE IN CONTROL TODAY WITH THE NEXT FAST MOVING LOW PRESSURE SYSTEM CROSSING THE REGION TONIGHT AND MONDAY WITH A SLIGHT CHANCE SHOWERS.
TEMPERATURES ARE CURRENTLY IN THE LOWER TO MID 30S. THE UPPER DISTURBANCE IS FORECAST TO SHIFT WELL EAST OF THE AREA AS HIGH PRESSURE ALOFT BUILDS IN FROM THE WEST.
MODELS ARE IN FAIRLY GOOD AGREEMENT ON THE TIMING AND EVOLUTION OF THE UPPER TROUGH AS IT SWINGS THROUGH OUR AREA TONIGHT.
544 AM EST SUN JAN 25 2015 LOW PRESSURE WILL BRING WIDESPREAD SNOW LATER TODAY THROUGH MONDAY. BROAD UPR TROFG IS PROGGED TO BEGIN TO SHIFT E OF THE RGN TUE WITH DCRG SNW SHWR CHCS.
SFC WINDS WILL INCREASE TO BETWEEN 12 AND 15 KTS WITH GUSTS BETWEEN 20 AND 25 KTS BY MID TO LATE MORNING AS A COLD FRONT MOVES ACROSS THE AREA. AFTERNOON HIGH TEMPERATURES TODAY TO CLIMB INTO THE LOW TO MID 60S WITH LOWS IN THE MID TO UPPER 30S OVERNIGHT. UPPER-LEVEL RIDGE TO MAINTAIN MAINLY NORTHWEST FLOW ALOFT,,,TRANSITIONING TO ZONAL FLOW BY MIDWEEK.
THE RIDGE AND THUS ALSO THE INVERSION ARE AT PEAK STRENGTH OVER THE AREA WITH AREAS OF NEAR ZERO VISIBILITIY THROUGH 10 AM PST. SIMILAR TO YESTERDAY, THE SHALLOWNESS OF THE INVERSION LAYER SHOULD ALLOW THE LOW CLOUDS AND FOG TO DISSIPATE AND GIVE WAY TO A SUNNY AFTERNOON. A VERY STRONG RIDGE OF HIGH PRESSURE WILL PERSIST ALONG THE WEST COAST LEADING A STAGNANT AIRMASS WITH STRONG INVERSIONS OVERNIGHT THROUGH LATE MORNING. JUST OFF THE BAJA PENINSULA THERE IS A CLOSED LOW PRESSURE THAT IS FORECAST TO SPIN TO THE NE INTO SOUTHERN CALIFORNIA.
340 AM PST SUN JAN 25 2015 GUSTY NORTHEAST WINDS AND HIGH PRESSURE ALOFT WITH BRING CLEAR SKIES AND WELL ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND. WITH LOW PRESSURE SYSTEMS BRINGING A CHANCE OF SHOWERS EARLY IN THE WEEK. WELL ALMOST THERE WILL LIKELY BE A FEW WARNING LEVEL GUSTS OF 60 MPH ACROSS A FEW REMOTE MOUNTAIN RIDGETOPS. THERE WILL BE PLENTY OF MAX TEMPS IN THE LOWER 80S TODAY OR 10 TO 15 DEGREES ABOVE NORMAL.
CHATTANOOGA AIRPORT, TN 54 37 42 29 / 40 70 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 52 35 42 29 / 30 80 50 10 OAK RIDGE, TN 51 34 41 29 / 40 80 50 20 TRI CITIES AIRPORT, TN 51 34 40 26 / 10 80 60 30.
TODAY A WEAK WAVE WILL MOVE ACROSS THE STATE AS A RIDGE BEGINS BUILDING INTO THE AREA. THE LEE SIDE TROUGH WILL TIGHTEN THE PRESSURE GRADIENT ACROSS THE BEARTOOTH AND ABSAROKA MOUNTAINS AGAIN THIS MORNING. WITH THE RIDGE BUILDING IN.
AN APPROACHING CENTRAL TEXAS MORNING COLD FRONT WILL TIGHTEN THE DOWNSTREAM WEST-TO-EAST PRESSURE GRADIENT BEFORE ITS AFTERNOON PASSAGE ACROSS THE REGION VEERS MODERATE WESTERLIES MORE NORTHERLY.
408 AM MST SUN JAN 25 2015 REX PATTERN BECOMING A BIT MORE DEFINED OFF THE LEFT COASTLINE OF NOAM THIS MORNING WITH DEEP TROUGHING TO THE EAST. NORTHWEST FLOW AT THE INTERFACE OF THIS PATTERN IS PULLING PACIFIC MOISTURE OVER THE CREST THE RIDGE TOWARD THE CENTRAL ROCKIES. THE CHALLENGE WILL BE WHAT WILL HAPPEN TO THE MOISTURE IN THE LOWER LAYERS AS THE UPPER RIDGE AXIS FOLDS EASTWARD INTO THE GREAT BASIN. THE SHIFT IN THE RIDGE AXIS BRINGS IN WARMER. OTHERWISE DRY WEATHER CONTINUES WITH HIGH PRESSURE IN CONTROL.
With the ridge firmly in place over the Northern Rockies, it is likely for dense fog to reform overnight tonight once again in similar locations. Model guidance remain in agreement that high pressure and warm air will move into Idaho and Montana tonight. The ridge over the region will reach a peak on Monday and near record to over record temperatures will be observed. Hamilton has a high chance to be one of the warmer spots in the low 60s for Monday.
DRY WEATHER AND UNSEASONABLY WARM TEMPERATURES WILL PERSIST THROUGH MONDAY AS THE REGION REMAINS UNDER THE INFLUENCE OF A STRONG RIDGE OF HIGH PRESSURE.
STRONG HIGH PRESSURE WILL PERSIST ACROSS THE WESTERN STATES TODAY. A LOW PRESSURE SYSTEM WILL MOVE THROUGH THE AREA MONDAY. ANOTHER LOW PRESSURE SYSTEM WILL BRING ADDITIONAL MOISTURE AND ANOTHER CHANCE FOR PRECIPITATION LATE IN THE WEEK THROUGH THE WEEKEND. LATEST STREAMLINE ANALYSIS SHOWS A LARGE ANTICYCLONE ACROSS NORTHERN CALIFORNIA BUILDING SOUTHEASTWARD. A CLOSED LOW EVIDENT ON WV IMAGERY CONTINUES TO RETROGRADE WESTWARD FROM THE BAJA PENINSULA. MODELS CONTINUE TO INDICATE THAT THE AFOREMENTIONED LOW PRESSURE SYSTEM WILL LIFT NORTHWARD BEGINNING TONIGHT. RAIN SHOWERS WILL GENERALLY TAPER OFF MONDAY NIGHT AS THE SYSTEM WEAKENS AND SUBSIDENCE OVERSPREADS SOUTHERN AZ BEHIND THE TROUGH AXIS. THE HIGHEST RAIN TOTALS ARE EXPECTED ACROSS SOUTHWESTERN AZ WHERE LOW-MID LEVEL THETA-E WILL BE MAXIMIZED.
STRONG HIGH PRESSURE BUILDING IN THE UPPER LEVELS WILL REMAIN IN CONTROL ACROSS THE REGION DURING THE NEXT 24 HR. WINDS SHIFT NORTHERLY CLOSE TO MIDNIGHT AS REINFORCING HIGH PRESSURE MOVES INTO THE CWA. UPPER LEVEL RIDGE WILL BUILD ACROSS THE AREA WHILE AN UPPER LOW REMAINS ALMOST STATIONARY OVER THE BAJA CA COAST. THIS LOW PRESSURE SYSTEM WILL STREAM FEW TO SCT HIGH CLOUDS THROUGH THE SHORT TERM PERIOD. ABUNDANCE OF SUNSHINE TODAY WILL ALLOW FOR TEMPERATURES TO REACH THE LOWER 70S ACROSS THE CWA. REINFORCING HIGH PRESSURE MOVES SOUTH RETURNING WINDS MORE NORTHERLY AND THICKNESS VALUES GRADUALLY LOWER A BIT MORE. LOW TEMPS EARLY MONDAY MORNING WILL BE IN THE LOW TO MID 40S AND HIGH TEMPERATURES WILL BE IN THE LOW 70S.
AN OFFSHORE FLOW WILL BRING BREEZY CONDITIONS OVER THE RIDGES AND THROUGH THE MOUNTAIN PASSES TODAY.
325 AM MST SUN JAN 25 2015 STRONG HIGH PRESSURE WILL PERSIST ACROSS THE WESTERN STATES TODAY. A LOW PRESSURE SYSTEM WILL MOVE THROUGH THE AREA MONDAY. ANOTHER LOW PRESSURE SYSTEM WILL BRING ADDITIONAL MOISTURE AND ANOTHER CHANCE FOR PRECIPITATION LATE IN THE WEEK THROUGH THE WEEKEND. LATEST STREAMLINE ANALYSIS SHOWS A LARGE ANTICYCLONE ACROSS NORTHERN CALIFORNIA BUILDING SOUTHEASTWARD. A CLOSED LOW EVIDENT ON WV IMAGERY CONTINUES TO RETROGRADE WESTWARD FROM THE BAJA PENINSULA. MODELS CONTINUE TO INDICATE THAT THE AFOREMENTIONED LOW PRESSURE SYSTEM WILL LIFT NORTHWARD BEGINNING TONIGHT. RAIN SHOWERS WILL GENERALLY TAPER OFF MONDAY NIGHT AS THE SYSTEM WEAKENS AND SUBSIDENCE OVERSPREADS SOUTHERN AZ BEHIND THE TROUGH AXIS. THE HIGHEST RAIN TOTALS ARE EXPECTED ACROSS SOUTHWESTERN AZ WHERE LOW-MID LEVEL THETA-E WILL BE MAXIMIZED.
A VERY STRONG RIDGE OF HIGH PRESSURE WILL PERSIST ALONG THE WEST COAST LEADING A STAGNANT AIRMASS WITH STRONG INVERSIONS OVERNIGHT THROUGH LATE MORNING. JUST OFF THE BAJA PENINSULA THERE IS A CLOSED LOW PRESSURE THAT IS FORECAST TO SPIN TO THE NE INTO SOUTHERN CALIFORNIA.
A 1001 MB LOW PRESSURE SYSTEM IS MOVING ACROSS SOUTHERN IOWA WHILE A POTENT UPPER LEVEL TROF PUSHES INTO THE MIDDLE MISSISSIPPI VALLEY. THE POTENT UPPER TROF WILL CLOSE OFF AS IT MOVES INTO THE WESTERN OHIO VALLEY. NOW DEVELOPING ACROSS NW ARKANSAS ALONG AND AHEAD OF A DEVELOPING COLD FRONT. THIS AFTERNOON EXPECT SHOWERS TO RE-DEVELOP AS THE UPPER LOW MOVES JUST NORTH OF THE AREA. THE UPPER LOW WILL QUICKLY MOVE EAST OF THE AREA THOUGH SCATTERED SHOWERS WILL LINGER INTO THE EVENING OVER MUCH OF THE AREA.
1046 AM EST SUN JAN 25 2015 DRY HIGH PRESSURE WILL CONTINUE TO BUILD ACROSS SOUTH FLORIDA THROUGH THE DAY WITH MOSTLY CLEAR SKIES. LIGHT WEST WINDS TONIGHT AS SOME HIGH CLOUDS STREAM ACROSS THE TERMINALS, WELL SOUTH OF A COLD FRONT ENTERING NORTH FLORIDA.
Somewhat gusty north winds will follow passage of a cold front this morning. The higher speeds and gusts will occur at KABI. Highs this afternoon will range from the lower 60s across our northern counties, to the upper 60s along the Interstate 10 corridor. Overnight lows are expected to range from near 30 in the low- lying areas and river valleys of our central and southern counties, to the mid/upper 30s across the Big Country.
A FAST-MOVING LOW PRESSURE AREA WILL PUSH INTO EXTREME SOUTHERN ILLINOIS BY 18Z, BRINGING MVFR CONDITIONS TO CKV BY 17Z AND TO BNA BY 19Z. AS THE LOW PUSHES SOUTHEASTWARD INTO KENTUCKY DURING THE AFTERNOON, EXPECT MVFR CONDITIONS TO DEVELOP AT CSV BY 22Z. SFC WINDS WILL BECOME GUSTY AND SWITCH FROM SOUTH, TO WEST, TO NORTHWEST, AS THE LOW PRESSURE AREA PASSES ACROSS KENTUCKY LATER TODAY AND TONIGHT.
LOW PRESSURE CENTERED DIRECTLY OVER KNOXVILLE WILL CONTINUE TO PUSH SOUTHEAST THIS MORNING BEFORE CENTERING ITSELF OVER SOUTHERN ILLINOIS BY AROUND MIDDAY TODAY. THE HIGHER SNOW AMOUNTS LOOK TO BE TOWARDS THE ALO TO MIW AREA WHERE THE RAIN LOOKS TO SHIFT TO SNOW QUICKEST AND REMAIN IN THE BETTER FORCING AND DEEP MOISTURE FOR MUCH OF THE MORNING. PERSISTENT RIDGE ALOFT AT H500 BUILDING SLIGHTLY EAST THROUGH MONDAY MORNING WITH NEXT UPSTREAM WAVE EXPECTED TO PASS EAST OF THE AREA ON MONDAY. AS A TROUGH PASSES EAST ON MONDAY MIXING WILL HELP BUMP TEMPS INTO THE 40S AND LOWER 50S OVER THE AREA.
WE ADDED SOME LOW POPS FOR FREEZING RAIN IN ALL BUT THE NORTHEAST. TEMPS SHOULD RISE TO NEAR FREEZING THOUGH ALONG AND WEST OF THE VALLEY. WITH SFC TEMPS REMAINING BELOW FREEZING AND SOME SLICK SPOTS POSSIBLE WHEREVER FREEZING RAIN FALLS. SHOULD SEE A BREAK FROM THE ALMOST DAILY SHORT WAVE PASSAGES WE HAVE BEEN SEEING AS UPPER RIDGE SHIFTS EAST. LONG WAVE TROUGH WAS OVER EASTERN NORTH AMERICA WHILE A LONG WAVE RIDGE WAS OVER WESTERN CANADA. WESTERN CANADA RIDGE WEAKENS SLIGHTLY OVER THE PERIOD. EASTERN TROUGH AMPLIFIES A BIT. SHORT WAVE TROUGHS WILL CONTINUE TO MOVE THROUGH THE FLOW IN THIS PROGRESSIVE PATTERN.
WINDS WERE BECOMING WEST NORTHWEST AROUND 10 KNOTS AT TAF ISSUANCE TIME AND WILL BECOME NORTHWEST AT 15-20 KNOTS AROUND 15Z AS A COLD FRONT MOVES INTO THE REGION. /ISSUED 350 AM CST SUN JAN 25 2015/ TODAY WILL BE THE FINAL DAY OF NORTHWEST FLOW BEFORE DEEP RIDGING ALOFT TAKES HOLD.
320 AM PST SUN JAN 25 2015 HIGH PRESSURE ALOFT OVER NORTHERN AND CENTRAL CALIFORNIA WILL CONTINUE WARMER WEATHER TODAY.
Winds will continue shifting to the north this morning then to the northeast this afternoon as a cold front comes through the area. /ISSUED 400 AM CST Sun Jan 25 2015/ Sfc obs show a weak cold front to the north of the region, w/buffer soundings bringing fropa to KMAF at around 10Z. Further west, WV imagery shows a massive cut-off low separated from upper-lvl flow and parked off the coast of Baja. In between this trough and NW flow to the east, models develop a highly-amped ridge over West Texas/Southeast New Mexico over the next few days. This feature is forecast to build east and flatten into midweek as the upper trough shears out as it moves NE back into the jetstream. Upper ridging will allow for a brief respite from the cold temps of late.