Aikyam-Lab/Synoptic-Bench huggingface dataset:
/ISSUED 731 PM EDT FRI MAR 27 2015/ STRONG UPPER TROUGH WITH ABUNDANT VORT MAX ENERGY IS APPROACHING THE STATE AND CURRENTLY SPREADING ABUNDANT MID LEVEL CLOUDINESS INTO NORTH AND WEST CENTRAL GA. SO CANNOT RULE OUT A FEW SPRINKLES OF LIGHT RAIN THROUGH THE EVENING AS THE UPPER TROUGH AXIS MOVES ACROSS THE STATE. THE CLOUDS AND WINDS MAY HINDER SOME AREAS FROM REACHING FREEZING TONIGHT. MAIN FORECAST CONCERN IS FREEZING TEMPERATURES TOMORROW MORNING AND AGAIN SUNDAY MORNING.
TEMPERATURES WERE MAINLY IN THE LOWER 20S ALONG AND NORTH OF A LINE FROM FAIRFIELD TO GALESBURG WITH MID 20S TO THE SOUTH.
SOME LOCATIONS WERE ALSO EXPERIENCING LIGHT FREEZING DRIZZLE. WINDS WILL INCREASE THIS AFTERNOON AHEAD OF AN APPROACHING TROUGH AND COLD FRONT. A PREFRONTAL TROUGH IS EXPECTED TO ENTER WESTERN NORTH DAKOTA LATE THIS AFTERNOON. THIS WILL BE THE FOCUS FOR AFTERNOON THUNDERSTORM DEVELOPMENT AND GUSTY WINDS NEAR 50 MPH (RESPONSIBLE FOR THE HIGH WIND WARNING). THE COLD FRONT WILL THEN MOVE THROUGH LATE TONIGHT INTO TOMORROW MORNING. BEHIND THE COLD FRONT VERY IMPRESSIVE STEEP PRESSURE RISES ARE FORECAST BY THE MODELS.
TODAY, CAUGHT WITHIN AN ELONGATED TROF. STILL, THE POLAR AIR WILL USHER IN VERY COLD TEMPERATURES, WITH MAXES ONLY REACHING THE LOWER OR MIDDLE 20S IN INTERIOR SECTIONS OF THE SUSQUEHANNA REGION. BY LATE SUNDAY, THE HIGH WILL BE OFF THE SOUTH CAROLINA COAST, WITH A WEAK RETURN FLOW BRINGING MODERATION OF TEMPERATURES TO NY/PA.
RIDGING INFLUENCES SFC/ALOFT SHOULD RESULT IN VFR CONDITIONS WITH SOME PASSING BKN CI POSSIBLE THRU 29/12Z. TEMPS HAVE FALLEN TO AT OR BELOW FREEZING AND ARE GENERALLY RUNNING IN THE UPPER 20S TO NEAR 30. THERMAL TROUGHING WILL MOVE SLOWLY EASTWARD WITH THE AXIS REACHING THE ATLANTIC STATES BY LATE AFTERNOON. HEIGHTS ACROSS MIDDLE TN WILL NOT INCREASE AS THE TROUGH TO OUR EAST STRENGTHENS. THERMAL TROUGH WILL LOOSEN ITS GRIP A BIT.
303 AM EDT SAT MAR 28 2015 THE COLD FRONT IS CROSSING SOUTH FLORIDA. WITH HIGH PRESSURE BEGINNING TO BUILD IN FROM THE NORTH. HIGH PRESSURE WILL GENERALLY PREVAIL THROUGH THE WEEKEND. STRONG COLD ADVECTION IN N/NW SURFACE FLOW WILL RESULT IN HIGHS TODAY ONLY RISING INTO THE LOWER/MID 60S. AND ACTUALLY A BIT COOLER CLOSER TO THE COAST AS WINDS TURN ONSHORE.
SHORT RANGE MODELS INDICATE AN UPPER LEVEL RIDGE OF HIGH PRESSURE BREAKING DOWN TONIGHT AND SATURDAY AS IT MOVES EASTWARD OUT OF THE ROCKIES INTO THE WESTERN HIGH PLAINS. ADDITIONALLY, A LEE SIDE TROUGH OF LOW PRESSURE WILL DEVELOP ACROSS EASTERN COLORADO CREATING SOME DOWNSLOPING EFFECT ACROSS WESTERN KANSAS OVERNIGHT. UNDER CLEARING SKIES, LOOK FOR HIGHS UP INTO THE 70S(F) ACROSS CENTRAL KANSAS WITH THE LOWER TO MID 80S(F) POSSIBLE IN EXTREME SOUTHWEST KANSAS. THIS WILL RESULT IN A NOTICEABLE COLD FRONT PASSAGE (IN TERMS OF WIND SHIFT/STRENGTH).
531 AM EDT SAT MAR 28 2015 DEEP TROUGH AXIS IS WORKING ACROSS THE APPALACHIANS. SKIES WILL CLEAR OUT THROUGH THE DAY AS HIGH PRESSURE BUILDS IN. THE CENTER OF THE HIGH WILL BUILD IN OVERNIGHT TONIGHT. WHILE RIDGES STAY UP IN THE LOW 20S. THE HIGH WILL SHIFT SOUTHEAST OF THE AREA ON SUNDAY. AS A SHORT WAVE TROUGH MOVES INTO THE GREAT LAKES AND OHIO VALLEY REGIONS. HIGHS ON SUNDAY WILL REBOUND TO THE LOW AND MID 50S.
1134 PM MDT FRI MAR 27 2015 06Z TAF CYCLE MOSTLY CLEAR SKIES AND VFR CONDITIONS WILL PREVAIL ACROSS NORTHERN AND CENTRAL NEW MEXICO OVER THE NEXT 24 HOURS AS A RIDGE OF HIGH PRESSURE BUILDS OVER THE AMERICAN SOUTHWEST.
NORTHWEST WINDS PREVAILED IN THE LOWER AND MID LEVELS. /ISSUED 349 PM CDT FRI MAR 27 2015/ GORGEOUS WEATHER WILL CONTINUE INTO THE FIRST PART OF THIS WEEKEND AS COOL AND DRY HIGH PRESSURE SETTLES OVER THE AREA. RANGING FROM THE LOWER 40S NORTH TO THE LOWER 50S NEAR THE LOUISIANA COAST. THUS AM CARRYING TEMPS A FEW DEGREES HIGHER THAN GUIDANCE WITH FORECAST AFTERNOON TEMPS GENERALLY IN THE LOWER 70S. HIGH PRESSURE SHIFTS EASTWARD ON SUNDAY AND WARMING TREND BEGINS AS WINDS BECOME SOUTHEASTERLY.
CHATTANOOGA AIRPORT, TN 31 51 29 60 / 20 10 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 27 46 24 57 / 40 0 0 10 OAK RIDGE, TN 27 46 25 57 / 30 0 0 10 TRI CITIES AIRPORT, TN 25 40 19 53 / 30 10 0 10 NC.
319 AM CDT Sat Mar 28 2015 The warming trend continues today as upper ridging to the west, along with the 850mb thermal ridge, inch eastward throughout the day. This lovely stretch of warm temps will briefly come to an end with the arrival of a cold front Sunday evening.
CLOUDS WILL DISSIPATE AFTER 9 OR 10 AM SUNDAY FOR ANOTHER WARM DAY WITH HIGHS IN THE LOWER TO MID 80S ACROSS MOST AREAS WITH UPPER 80S OVER THE RIO GRANDE.
552 AM CDT SAT MAR 28 2015 SOME VERY LIGHT RETURNS ACROSS EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS ARE MOVING SSE IN ASSOCIATION WITH UPPER LEVEL DISTURBANCE ON THE BACKSIDE OF A LONGWAVE TROUGH TO OUR EAST. /ISSUED 255 AM CDT SAT MAR 28 2015/ DEEP UPPER LEVEL TROUGH REMAINS ANCHORED ACROSS THE NORTHEAST U. ANOTHER DISTURBANCE WILL MOVE SOUTHWARD ALONG THE BACK SIDE OF THE TROUGH INTO THE MID MISS AND TENN VALLEY TODAY BUT ANY LIFT ASSOCIATED WITH THIS DISTURBANCE AND ANY PRECIP SHOULD REMAIN NORTH AND EAST OF OUR REGION.
FORECAST CONFIDENCE HIGH IT/S A CHILLY START OUT THERE THIS MORNING AS HIGH PRESSURE BROUGHT CLEAR SKIES. THE HIGH WILL SLIDE EAST BY TONIGHT WITH THE REGION GETTING INTO A BETTER PRESSURE GRADIENT OVERNIGHT AS A TROF OF LOW PRESSURE APPROACHES QUICKLY FROM THE NORTHWEST. LOW TEMPS WILL LIKELY OCCUR THIS EVENING WITH WARM ADVECTION AHEAD OF THE TROF OVERPOWERING THE NORMAL DIURNAL CURVE AFTER MIDNIGHT. MORNING TEMPS WILL BEGIN BELOW FREEZING. SO FREEZING RAIN OR SLEET IS EXPECTED WEST OF MADISON.
109 AM EDT SAT MAR 28 2015 A VERY SLOW MOVING UPPER LEVEL TROUGH OF LOW PRESSURE REMAINS TO OUR WEST OVERNIGHT AND WILL NOT MOVE EAST OF THE AREA UNTIL SATURDAY AFTERNOON. CURRENT OBS AND COMPOSITE RADAR ARE SHOWING A BAND OF SNOW SHOWERS OVER FRANKLIN AND CLINTON COUNTIES IN NEW YORK MOVING QUITE SLOWLY TO THE SOUTH BEFORE MEETING SLIGHTLY DRIER AIR OVER THE HIGH PEAKS IN THE ADIRONDACKS AND TAPERING OFF.
FREEZE WARNINGS IN EFFECT FOR NORTH AND PORTIONS OF CENTRAL HIGH PRESSURE WILL CONTINUE ACROSS MUCH OF GEORGIA THROUGH THE SHORT TERM PERIOD. TEMPERATURES IN FAR NORTHERN GA ARE IN THE LOWER TO MIDDLE 30S. HIGH PRESSURE IS CURRENTLY CENTERED ACROSS THE CENTRAL GREAT LAKES. THE HIGH WILL DROP SOUTH DURING THE DAY AND SHOULD MOVE DIRECTLY OVERHEAD TONIGHT. THIS MEANS THAT THE COOLER THAN NORMAL TEMPERATURES WILL CONTINUE. IF MODELS COME IN A LITTLE COOLER IN SUCCESSIVE RUNS.
BUT STILL VERY DRY IN THE LOWER LEVELS OF THE ATMOSPHERE. WE WILL HAVE A CHANCE OF SHWRS/TSTMS AS A MID/UPPER LEVEL TROF MOVES ACROSS. EXPECT A COLD FRONT TO MOVE THROUGH AND PRODUCE COOLER TEMPERATURES FOR THE WEEKEND. 33 LIGHT AND VARIABLE WINDS THIS MORNING WILL BECOME SOUTHWEST AND SOUTHERLY TODAY AND INCREASE ON SUNDAY AS THE PRESSURE GRADIENT TIGHTENS BETWEEN A TROUGH OF LOW PRESSURE OVER WEST TEXAS AND HIGH PRESSURE OVER THE SOUTHEAST STATES.
A CLEAR BUT COOL CONDITIONS ARE EXPECTED AS HIGH PRESSURE PUSHES ACROSS THE AREA TODAY AND TONIGHT. HIGH PRESSURE WILL BE IN CONTROL TODAY AND ASIDE FROM A FEW HIGH CLOUDS BRUSHING THE SOUTHWESTERN FORECAST AREA.
512 AM EDT SAT MAR 28 2015 LOW PRESSURE WILL TRACK SOUTH OF THE GULF OF MAINE TODAY. HIGH PRESSURE WILL CROSS THE REGION LATER TONIGHT THROUGH SUNDAY.
VIGOROUS SHORT WAVE ENERGY AND ASSOCIATED COLD FRONT WILL RACE FROM WEST TO EAST ACROSS THE AREA THIS AFTERNOON INTO EARLY THIS EVENING. SUBSIDENCE BEHIND THE TROUGH SHOULD AID IN BRINGING SOME OF THESE WINDS TO THE SURFACE. SUNDAY WILL BE QUIET BEHIND THIS SYSTEM WITH LIGHTER WINDS AND COOLER TEMPERATURES. THE COOLER TEMPERATURES WILL STILL BE ABOUT 15 DEGREES ABOVE NORMAL.
624 AM EDT SAT MAR 28 2015 AN UNSEASONABLY COLD HIGH PRESSURE SYSTEM WILL PUSH EAST ACROSS THE AREA TODAY INTO TONIGHT. INCREASING SOUTHERLY FLOW AHEAD OF AN APPROACHING COLD FRONT WILL ALLOW FOR MORE SEASONABLE TEMPERATURES ON SUNDAY. RAIN SHOWERS WILL DEVELOP SUNDAY AFTERNOON AND CONTINUE INTO SUNDAY NIGHT AS THE COLD FRONT MOVES THROUGH THE REGION. ONLY EXPECT HIGHS TODAY IN THE LOW TO MID 30S DESPITE THE SUNSHINE. SOUTHERLY LOW LEVEL FLOW WILL BE ON THE INCREASE THROUGH THE DAY ON SUNDAY AS WE START TO GET INTO SOME RETURN FLOW AND A COLD FRONT APPROACHES FROM THE WEST LATE IN THE DAY. THE COLD FRONT IS ASSOCIATED WITH SHORT WAVE ENERGY MOVING THROUGH THE SOUTHERN GREAT LAKES WHICH WILL ALLOW FOR SHOWERS TO DEVELOP WEST TO EAST ACROSS OUR AREA LATER SUNDAY AFTERNOON AND CONTINUE INTO SUNDAY NIGHT.
1054 PM PDT FRI MAR 27 2015 A fast moving cold front will arrive tonight bringing widespread showers, gusty winds, and the potential for thunderstorms to southeast Washington and portions of the Idaho Panhandle.
THE LOW-LEVEL AIR MASS WILL MODIFY SOME TODAY AND WITHOUT AS STRONG OF A LAKE ADVECTIVE COMPONENT IN THE WIND SPEED. HIGH PRESSURE WILL REMAIN DIRECTLY OVER THE AREA THROUGH TODAY BEFORE SHIFTING EAST TONIGHT. SURFACE WINDS WILL TURN SOUTHERLY TONIGHT AS LOW PRESSURE APPROACHES FROM THE NORTHWEST.
EVEN WITH PLENTY OF LATE MARCH SUNSHINE OVER THE REGION, HIGH TEMPS WILL CLIMB INTO THE UPPER 50S NORTH TO THE LOWER TO MIDDLE 60S SOUTH AT BEST THIS AFTERNOON, WHICH WILL BE A GOOD 10 TO 15 DEGREES BELOW AVERAGE. ALSO, BY LATER THIS AFTERNOON A PIECE OF ENERGY ON THE BACK SIDE OF THE VERY SHARP UPPER LEVEL TROF, WHICH IS CURRENTLY SWINGING EASTWARD THROUGH OUR AREA TONIGHT, IS EXPECTED TO BRING A GRADUAL INCREASE IN MID AND UPPER LEVEL CLOUDINESS TO THE CWA OVER TIME.
154 AM EDT SAT MAR 28 2015 ARCTIC HIGH PRESSURE WILL DROP SLOWLY SOUTHEAST ACROSS THE WESTERN GREAT LAKES TONIGHT REACHING THE OHIO RIVER VALLEY SATURDAY NIGHT.
318 AM CDT Sat Mar 28 2015 A well defined upper short wave trough diving south through the Midwest is bringing light mixed precipitation to mainly the eastern half of the forecast area.
THE DYNAMIC LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE REGION TONIGHT.
304 AM CDT SAT MAR 28 2015 WATER VAPOR SATELLITE THIS MORNING SHOWS A STRONG TROUGH MOVING ONSHORE FROM THE PACIFIC. THE EXPECTATION IS STILL THAT THERE WILL BE TWO SEPARATE SHORT WAVE TROUGHS THAT EMERGE FROM THIS TROUGH WITH ONE TRACKING ACROSS THE NORTHERN ROCKIES AND THE OTHER GOING SLIGHTLY FARTHER NORTH ACROSS SOUTHERN CANADA. IN THE LOW LEVELS. THE BAROCLINIC ZONE WITH THE COLD FRONT DOES NOT LOOK TO BE ALL THAT STRONG WHICH RESULTS IN ONLY SOME WEAK FRONTOGENESIS OCCURRING IN THE 1000-850 MB LAYER WITH THE PASSAGE OF THE FRONT. SLEET AND SOME FREEZING RAIN/DRIZZLE BEFORE GOING OVER TO ALL RAIN.
NORTH OF THE LOW. THE FORECAST FOR SUNDAY REMAINS SOMEWHAT TRICKY DUE TO A COLD FRONT MOVING THROUGH THE AREA.
658 AM EDT SAT MAR 28 2015 STRONG HIGH PRESSURE WILL BE OVERHEAD TODAY. WHILE WARMER THAN YESTERDAY. HAVE GIVEN SLIGHT NUDGE TO AFTN MAX TEMPS/ACQUIESCE TO LATE MARCH SOLAR ANGLE AS CORE OF LLVL THERMAL TROF CONTS EWD SHUNT THROUGH LWR GRTLKS TO UPSTATE NY/ERN PA LATER TODAY. AGAIN SIDED SLIGHTLY WARMER WITH MIN TEMPS OWING TO CONT LLVL WAA ALONG WITH UPTICK IN SFC GRADIENT FLOW BY DAYBREAK. AN UPPER LEVEL TROF OF PACIFIC ORIGIN WILL TOP THE WESTERN CONUS RIDGE AND MOVE ACROSS THE FORECAST AREA SUNDAY. THE NAM HAS TRENDED MUCH WARMER IN THE LOW LEVELS THE PAST 24 HOURS. THERE IS AN OUTSIDE CHANCE FOR A BRIEF PERIOD OF FREEZING RAIN SUNDAY MORNING. BUT FOR NOW HAVE KEPT FREEZING RAIN OUT DUE TO UNCERTAINTIES AND VERY LIMITED DURATION.
TEMPS HAVE FALLEN TO AT OR BELOW FREEZING AND ARE GENERALLY RUNNING IN THE UPPER 20S TO NEAR 30. THERMAL TROUGHING WILL MOVE SLOWLY EASTWARD WITH THE AXIS REACHING THE ATLANTIC STATES BY LATE AFTERNOON. HEIGHTS ACROSS MIDDLE TN WILL NOT INCREASE AS THE TROUGH TO OUR EAST STRENGTHENS. THERMAL TROUGH WILL LOOSEN ITS GRIP A BIT.
A WEAK LOW PRESSURE SYSTEM PASSING TO THE NORTH OF NEVADA WILL BRING ABOUT 5 TO 10 DEGREES OF COOLING TODAY.
RIDGE OF HIGH PRESSURE WILL BUILD INTO THE AREA TODAY AND TONIGHT WITH CLEARING SKIES.
332 AM CDT SAT MAR 28 2015 NORTH AND CENTRAL TEXAS REMAINS UNDER NORTHWEST FLOW ALOFT THIS MORNING AS A LARGE SCALE TROUGH RESIDES OVER THE EASTERN THIRD OF THE CONUS AND AN UPPER LEVEL RIDGE SITS OVER THE DESERT SOUTHWEST. AS THE TROUGH CONTINUES TO SLOWLY TRANSLATE EASTWARD AND THE RIDGE TO THE WEST BEGINS TO BREAK DOWN THIS WEEKEND.
NAM SHOWS A DEEP 500 MB TROUGH OVER THE ERN U. UPPER PATTERN THEN CHANGES WITH ECMWF KEEPING MORE ENERGY AND TROUGHING OVER THE PLAINS WHILE THE GFS DIGS TROUGHING INTO THE GREAT LAKES AREA FOR 12Z FRI. LOOKS QUITE ACTIVE FOR THIS PERIOD WITH SFC FRONTS IN THE AREA AND LOW PRESSURE SYSTEMS MOVING THROUGH THE AREA TUE AND THU. STRONG SOUTHWEST WINDS EXPECTED LATE TONIGHT THROUGH SUNDAY NIGHT AS LOW PRESSURE SYSTEM CROSSES MANITOBA AND NORTHERN ONTARIO.
330 AM CDT Sat Mar 28 2015 (Today and tonight) Yesterday's back-door cold front stalled across the northeast half of the CWA and is currently lifting back north as a warm front. Winds will increase again overnight in the favored areas near and downstream of the higher terrain as the low-level jet intensifies. Expect overnight lows ranging from the low 50s along the I-10 corridor to near 60 degrees along Interstate 20.
COLD HIGH PRESSURE CROSSES SATURDAY NIGHT. HIGH PRESSURE WILL BE IN CONTROL THROUGH SUNDAY.
WINDS MAINLY LIGHT WITH SOUTHWEST WIND DOMINATING BEFORE SHIFTING TO SOUTHEAST LATE IN FORECAST PERIOD AS WARM FRONT DEVELOPS NEAR RED RIVER. WITH THE EASTERN TROUGH SLOW TO EXIT THE NORTHEAST. ANOTHER WEAK H500 SHORT WAVE WILL RIDE DOWN THE UPPER MISSISSIPPI VALLEY EMBEDDED IN THE LARGER TROUGH. THIS WILL ONCE AGAIN RESULT IN A WEAK COLD FRONT. TEMPS WILL REBOUND THROUGH THE WEEKEND AS A SHORT RIDGE DEVELOPS OVER THE SW U.
1112 PM MDT FRI MAR 27 2015 A LARGE AMPLITUDE RIDGE OF HIGH PRESSURE OVER THE GREAT BASIN TODAY AND TONIGHT WILL FLATTEN ON SATURDAY AS A PACIFIC TROUGH RACES INLAND AND ACROSS THE NORTHERN ROCKIES. THIS TROUGH WILL PUSH A WEAK COLD FRONT INTO NORTHEAST UT LATE SATURDAY AFTERNOON. PRE-FRONTAL WARMING AHEAD OF THIS TROUGH SHOULD BOOST HIGH TEMPS ANOTHER 5+ DEGREES OVER TODAY. THE RIDGE WILL TRY TO REBOUND OVER THE WEST ON SUNDAY. HOWEVER THE NEXT WEAK TROUGH WILL WORK UNDER THE RIDGE AND INTO THE GREAT BASIN ON SUN. A SHARPER AND STRONGER TROUGH FOLLOWS IN THE ECMWF MODEL SOLUTION FOR LATE IN THE WORK WEEK. THE FRONT ON WED WILL USHER IN COOLER TEMPERATURES FOR THE SECOND HALF OF THE WEEK.
A COLD FRONT WILL PUSH ACROSS SOUTHEAST WYOMING AND NEBRASKA PANHANDLE SATURDAY EVENING WITH BREEZY TO WINDY CONDITIONS LINGERING OVER MUCH OF THE FORECAST AREA THROUGH SATURDAY NIGHT. HIGH TEMPERATURES WILL BE 10 TO 15 DEGREES COOLER COME SUNDAY BUT THAT WILL STILL BE AROUND 10 DEGREES ABOVE NORMAL FOR LATE MARCH.
HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE WEEKEND. AND A RETURN OF THE MARINE LAYER FOR COOLER DAYS. THEN SLIGHTLY COOLER ON SUNDAY. THE 00Z MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL WINDS. BUT 4-5 MBS ONSHORE TO THE LOWER DESERTS. COOLER MARINE AIR HAS ARRIVED ALONG THE COAST. WHILE A WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL AREAS THIS WEEKEND. THEN A LITTLE COOLER SUNDAY. MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING OVER THE WEST. AREAS OF VIS 1- 3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS.
As it does so, light northeasterly winds that have been affecting central IL will veer toward southeasterly, but remain light due to the weak pressure gradients around the high center. Flow ushering in some warmer air for the end of the weekend, at least briefly.
355 AM MDT SAT MAR 28 2015 THE RIDGE WAS BREAKING DOWN AS IT MOVED OVERHEAD THIS EARLY MORNING UNDER PRESSURE FROM A TROUGH MOVING THROUGH WASHINGTON- OREGON. IN SPITE OF THE WEAKENING OF THE RIDGE. THE TAIL OF THE WEAK COLD FRONT DROPS SOUTH OF THE WYOMING BORDER LATE AFTERNOON AND THROUGH THE I-70 CORRIDOR IN THE LATE EVENING BEFORE STALLING IN THE ABAJO-NW SAN JUAN MTNS TOWARDS SUNDAY MORNING. THE NEW AIR MASS IS DRIER AND SLIGHTLY COOLER OVER THE NORTHERN AND CENTRAL ZONES. LOOK TO BE ABOVE THE HIGHEST MOUNTAIN TOPS AS 700MB TEMPS ARE 6 TO 8C.
335 AM EDT SAT MAR 28 2015 HIGH PRESSURE WILL BUILD EAST ACROSS THE AREA TODAY AND TO THE SOUTHEASTERN UNITED STATES BY SUNDAY NIGHT.
255 AM CDT SAT MAR 28 2015 DEEP UPPER LEVEL TROUGH REMAINS ANCHORED ACROSS THE NORTHEAST U. ANOTHER DISTURBANCE WILL MOVE SOUTHWARD ALONG THE BACK SIDE OF THE TROUGH INTO THE MID MISS AND TENN VALLEY TODAY BUT ANY LIFT ASSOCIATED WITH THIS DISTURBANCE AND ANY PRECIP SHOULD REMAIN NORTH AND EAST OF OUR REGION.
611 AM EDT SAT MAR 28 2015 A COLD FRONT HAS MOVED OFFSHORE. NEAR OR BELOW FREEZING TEMPERATURES EXPECTED LATE TONIGHT AND EARLY SUNDAY MORNING.
318 AM EDT SAT MAR 28 2015 A COLD FRONT HAS MOVED OFFSHORE. NEAR OR BELOW FREEZING TEMPERATURES EXPECTED LATE SATURDAY NIGHT AND EARLY SUNDAY MORNING.
TEMPERATURES WILL ALSO BE WARMER THAN TODAY. BUT BIAS CORRECTION OVER THE LAST 15 DAYS PUSHES IT UP INTO THE LOW TO MID 30S. HIGH PRESSURE BUILDS ACROSS THE AREA SUNDAY NIGHT.
441 AM EDT SAT MAR 28 2015 STRONG HIGH PRESSURE WILL BE OVERHEAD TODAY. WHILE WARMER THAN YESTERDAY. HAVE GIVEN SLIGHT NUDGE TO AFTN MAX TEMPS/ACQUIESCE TO LATE MARCH SOLAR ANGLE AS CORE OF LLVL THERMAL TROF CONTS EWD SHUNT THROUGH LWR GRTLKS TO UPSTATE NY/ERN PA LATER TODAY. AGAIN SIDED SLIGHTLY WARMER WITH MIN TEMPS OWING TO CONT LLVL WAA ALONG WITH UPTICK IN SFC GRADIENT FLOW BY DAYBREAK. AN UPPER LEVEL TROF OF PACIFIC ORIGIN WILL TOP THE WESTERN CONUS RIDGE AND MOVE ACROSS THE FORECAST AREA SUNDAY. THE NAM HAS TRENDED MUCH WARMER IN THE LOW LEVELS THE PAST 24 HOURS. THERE IS AN OUTSIDE CHANCE FOR A BRIEF PERIOD OF FREEZING RAIN SUNDAY MORNING. BUT FOR NOW HAVE KEPT FREEZING RAIN OUT DUE TO UNCERTAINTIES AND VERY LIMITED DURATION.
A WIND SHIFT TO THE NORTH WILL OCCUR LATE TONIGHT AND EARLY SUNDAY IN THE WAKE OF A DRY COLD FRONTAL PASSAGE.
407 PM EST SAT FEB 14 2015 AN ARCTIC COLD FRONT WILL BRING BITTERLY COLD TEMPERATURES AND WIND CHILLS TO THE REGION THROUGH THE START OF THE WEEK. STEEP LOW LEVEL LAPSE RATES AND INSTABILITY FROM THE DIGGING UPPER TROUGH HAS PROVIDED FOR 1 INCH AN HOUR RATES AND NEAR ZERO VISIBILITY WITH THIS LINE. THE STRENGTH OF THE COLD FRONT WILL PROVIDE FOR THE COLDEST NIGHT THUS FAR THIS WINTER AND WITH A TIGHTENING SURFACE PRESSURE GRADIENT BETWEEN THE STRENGTHENING COASTAL LOW TO THE EAST AND THE HIGH TO THE WEST. ALREADY FRIGID TEMPERATURES WILL FURTHER PLUMMET AFTER NIGHTFALL AS THE HIGH SHIFTS EASTWARD AND WIND DIMINISHES.
AND WITH DEWPOINTS NOW IN THE LOWER 50S ACROSS THE I-10 CORRIDOR. THIS WILL HOLD THE TEMPERATURES AROUND 5 DEGREES COOLER THAN TODAY.
FURTHER SOUTHWEST IN AND AROUND THE LOWER MISSOURI BREAKS TEMPS WILL BE CONSIDERABLY MILDER IN THE LOWER 30S.
1120 AM CST SAT FEB 14 2015 THE COLD FRONT IS LOOMING JUST TO OUR NORTH ACROSS SOUTHEAST SOUTH DAKOTA AND NORTHWEST IOWA.
HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH SUNDAY.
1134 AM PST SAT FEB 14 2015 Warm temperatures will continue today while a weak cold front passes through the region.
SURFACE RIDGING BUILDS IN QUICKLY ON SUNDAY CAUSING WINDS TO LIGHTEN UP CONSIDERABLY.
358 PM EST SAT FEB 14 2015 A LOW PRESSURE AREA WILL MOVE SOUTH OF THE REGION OVERNIGHT AND WILL INTENSIFY OFF THE NEW ENGLAND COAST ON SUNDAY. THIS LOW PRESSURE AREA WILL BRING A LIGHT FLUFFY SNOW TO THE NORTH COUNTRY OVERNIGHT AND SUNDAY MORNING.
KEPT THE HIGH POPS. ALTHOUGH WOULD NOT BE SURPRISED IF SOME AREAS IN THE HIGHER POPS JUST TRACE OUT. SITUATED BETWEEN BROAD TROUGH FROM HUDSON BAY INTO THE GREAT LAKES. AND A RIDGE OVER THE WEST COAST. THE UPPER TROUGH DIGS A LITTLE FARTHER TO THE WEST MID WEEK AS ANOTHER ARCTIC FRONT OR TWO PLUNGE INTO THE NORTHERN PLAINS. UPPER TROUGH THEN RELAXES A BIT MORE TO THE EAST.
A SOUTHERLY LLJ IS PROG TO DEVELOP OVERNIGHT AS LOW PRESSURE ACROSS EASTERN NEW MEXICO SLOWLY DEEPENS AND SLIDES SOUTH.
/ISSUED 254 AM PST SAT FEB 14 2015/ HIGH PRESSURE ALOFT WILL BUILD JUST OFF THE PACIFIC COAST THIS WEEKEND.
305 PM CST SAT FEB 14 2015 THIS UNSEASONABLY WARM FEBRUARY DAY WILL COME TO AN ABRUPT HALT ACROSS NE OK AS THE LEADING EDGE OF A STRONG COLD FRONT SURGES INTO THE AREA THE REMAINDER OF THE AFTERNOON. WITH SOME LIGHT FREEZING RAIN/SLEET POSSIBLE ACROSS NE OK/NW AR WITH MAINLY LIGHT RAIN ELSEWHERE. AREAS FARTHER S (SE OK/WCNTRL AR) SHOULD SEE MOSTLY FREEZING RAIN WITH A MIX OF SLEET ENTERING LATER SUNDAY NIGHT. WITH THE HIGHEST AMOUNTS ACROSS NW AR. WHERE SFC TEMPS WILL HOVER VERY NEAR OR PERHAPS A BIT ABOVE FREEZING.
WITH AFTERNOON HIGHS REACHING INTO THE LOW TO MID 50S. AS TEMPS FALL BELOW FREEZING THIS EVENING. AS A COLD FRONT MOVES THROUGH THE AREA. THE COLD FRONT IS EXPECTED TO MOVE THROUGH EACH TERMINAL BY 04Z.
WITH JUST A REMOTE PERIOD OF FREEZING RAIN POSSIBLE.
LARGE SCALE TROF OVER THE EASTERN CONUS. AND WEAKENING RIDGE OVER THE WESTERN STATES. WITH MOSTLY AREAS OF LIGHT FREEZING DRIZZLE AND FLURRIES. BUT WILL CONTINUE TO MONITOR THE FREEZING DRIZZLE. MAINLY TO EXPAND COVERAGE OF FOG AND FREEZING DRIZZLE A BIT FURTHER INTO THE BLACK HILLS THIS MORNING. TODAY THROUGH SUNDAY NIGHT UPPER RIDGING ACROSS THE PACIFIC COAST CONTINUES WITH NW FLOW REMAINING OVER THE REGION. THIS PROFILE SUGGESTS A MIXTURE OF FOG/FREEZING RAIN/DRIZZLE. AND PERHAPS SOUTHEAST TO THE PINE RIDGE AREA. FREEZING RAIN/DRIZZLE IS EXPECTED TO END BY MIDDAY TODAY WITH LINGERING LIGHT SNOW POSSIBLE THROUGH THE AFTERNOON.
AND NORTHERLY WINDS ARE LULLING INTO THE LATE AFTERNOON ON THE LOW END OF THE 10 TO 15 KNOT RANGE. HIGH PRESSURE REMAINS IN PLACE ACROSS THE NORTHERN GULF COAST AT THE SURFACE. WHILE A BROAD MIDLEVEL TROUGH IS CENTERED OVER THE EASTERN UNITED STATES AT THIS TIME. NORTHERLY WINDS AND BUILDING HIGH PRESSURE OVER THE EASTERN UNITED STATES WILL KEEP DEW POINTS LOW.
330 PM CST SAT FEB 14 2015 THE COLD NORTHERLY WINDS OVER THE NORTHLAND THIS AFTERNOON WILL GRADUALLY WEAKEN INTO TONIGHT AS HIGH PRESSURE IN MANITOBA MOVES INTO THE LAKE SUPERIOR REGION. LIGHT SOUTHERLY WINDS WILL DEVELOP LATE TONIGHT AND SUNDAY MORNING IN THE WAKE OF THE HIGH PRESSURE AND AS A TROUGH IN THE NORTHERN PLAINS APPROACHES THE UPPER MIDWEST.
STRONG COLD FRONT WILL MOVE INTO NE OK/NW AR BY 20Z. WEST COMPONENT TO SFC WINDS ALONG WITH FULL SUN ALREADY PUSHING TEMPS INTO THE LOW 60S IN MUCH OF NE OKLAHOMA WITH 2-4 HOURS BEFORE A STRONG COLD FRONT BEGINS TO MAKE ITS WAY SOUTH THROUGH THE AREA. WINDS HAVE BEEN GUSTING AROUND 25 MPH ALONG THE KANSAS BORDER THIS MORNING AND WHILE SPEEDS WILL DIMINISH A TAD THROUGH THE DAY AS SFC GRADIENT MOMENTARILY WEAKENS AHEAD OF COLD FRONT.
HIGH PRESSURE ACROSS THE GREAT BASIN WILL WEAKEN AND RETREAT TO THE WEST TODAY.
SOME AREAS OF DENSE FOG STILL REMAIN IN THE LOWER YAKIMA VALLEY AROUND GRANDVIEW AND SUNNYSIDE AND IN PORTIONS OF THE LOWER COLUMBIA BASIN OF WASHINGTON AND OREGON.
340 PM CST SAT FEB 14 2015 BOUNDARY FROM LOW PRESSURE SYSTEM HAS PUSHED WELL SOUTH OF IOWA BY LATE AFTERNOON.
AS OF MID AFTERNOON A RIDGE AXIS EXTENDED DOWN THE WESTERN EDGE OF THE RED RIVER VALLEY.
1139 AM CST SAT FEB 14 2015 A COLD FRONT WILL START TO PUSH SOUTHWEST ACROSS THE PANHANDLES BY MID AFTERNOON. BEYOND 00Z CONFIDENCE LOWERS REGARDING WIND DIRECTION DEPENDENT UPON THE PASSAGE OF A COLD FRONT. /ISSUED 516 AM CST SAT FEB 14 2015/ WITH THE EXCEPTION OF A DRY COLD FRONTAL PASSAGE LATE AFTERNOON AND TONIGHT. WARMER TEMPERATURES ANTICIPATED ACROSS MOST OF THE AREA TODAY XCEPT THE CNTRL AND ERN OK PNHDL AND THE NERN TX PNHDL AS THE AFOREMENTIONED COLD FRONT SHOULD MAKE IT INTO THAT PART OF OUR FCST AREA LATE THIS AFTERNOON. COOLER TEMPERATURES WILL PREVAIL ACROSS ALL OF THE TX AND OK PNHDLS ON SUNDAY. FEATURING AN UPPER LEVEL RIDGE ALONG THE W COAST AND A DEEP UPPER LEVEL TROF OVER THE ERN HALF OF THE U.
THIS GREAT LAKES UPPER TROUGH HAS PUSHED AN ARCTIC COLD FRONT INTO SOUTHWESTERN KANSAS WITH GUSTY NORTHEAST TO EAST WINDS AT 20 TO 30 MPH. THE GUSTY EAST TO NORTHEAST WINDS WILL GRADUALLY DECREASE TO AROUND 10 TO 12 MPH BY MORNING, AS THE SURFACE PRESSURE GRADIENT RELAXES, AND AS THE COLD HIGH PRESSURE RIDGE AXIS BUILD INTO THE AREA. LIGHT EAST WINDS BECOME NORTHEAST AS THE RIDGE AXIS CONTINUES TO PUSH INTO WESTERN KANSAS.
AS NW FLOW ALOFT AND HIGH PRESSURE AT THE SFC MAKING FOR A VERY NICE VALENTINE'S DAY. BUT THERE WILL BE A GOOD WARM UP FOR TODAY WITH WESTERLY WINDS AHEAD OF ANOTHER ARCTIC COLD FRONT LATE TONIGHT.