Aikyam-Lab/Synoptic-Bench huggingface dataset:
HIGH PRESSURE ALOFT WILL KEEP THE AREA DRY INTO TUESDAY MORNING, BUT A WEAK DISTURBANCE WILL BRING INCREASING MID AND HIGH CLOUDINESS TO THE AREA THROUGH THEN. AN INCREASINGLY MOIST AND UNSTABLE SOUTHWEST FLOW ALOFT WILL THEN COMBINE WITH A COLD FRONT TO BRING AN INCREASING CHANCE OF SHOWERS TO THE AREA AFTER 18Z, WITH A FEW THUNDERSTORMS POSSIBLE OVER SOUTHWEST MONTANA.
FORECAST SURFACE TEMPS REQUIRE THAT P-TYPE INCLUDE A MENTION OF FREEZING RAIN. SIDED WITH THE LOWEST END OF GUIDANCE FOR DEWPOINTS. AND WHERE RH VALUES ARE THE LOWEST OVER NORTH CENTRAL SD. THESE HI-RES MODELS HAVE BEEN DOING EXTREMELY WELL LATELY PICKING UP ON THE LOWER RH VALUES IN THESE WELL MIXED/DRY/MILD AIR MASSES. SFC WARM FRONT ALSO SETS UP OVER THAT AREA DURING THE AFTERNOON.
705 PM EDT MON APR 11 2016 HIGH PRESSURE WILL SHIFT FARTHER OFF SHORE THROUGH TONIGHT. SHOWERS AND THUNDERSTORMS WILL RETURN TO THE AREA TUESDAY AND TUESDAY NIGHT AS A COLD FRONT MOVES ACROSS.
423 PM PDT MON APR 11 2016 The strong upper level ridge of past few days will finally give way to a more unsettled and cooler pattern as a upper level trough slowly moves in.
1141 PM EDT MON APR 11 2016 A SLOW MOVING COLD FRONT WILL SLIDE SOUTHEAST ACROSS PENNSYLVANIA TONIGHT AND EARLY TUESDAY. HIGH PRESSURE WILL BUILD OVER THE REGION FOR LATER TUESDAY THROUGH THE END OF THE WEEK. 02Z SFC ANALYSIS INDICATES COLD FRONT IS JUST ENTERING NW PA. AS COLD FRONT PUSHES THRU. TEMPS WILL COOL BACK DOWN TO NEAR FREEZING OVER THE NW MOUNTAINS BY DAWN AND TO AROUND 50 OVER LANCASTER CO. THE COLD FRONT WILL MOVE EAST OF THE REGION TUESDAY WITH ANY LINGERING SHOWERS LIKELY PUSHING EAST OF LANCASTER CO BY 12Z. HIGHS FROM THE LOW 40S NW TO MID 50S SE WILL BE ABOUT 5-15 DEG BELOW NORMAL. THE UPPER LEVEL TROUGH WILL LIFT OFF TO THE EAST TUESDAY NIGHT.
THE COLD FRONT ITSELF IS JUST NOW BEGINNING TO CROSS EWD INTO NW AL. WITH THE ASSOCIATED COLD FRONT APPROACHING THE AREA.
640 PM CDT MON APR 11 2016 STRONG LOW PRESSURE SYSTEM IS GRADUALLY SHIFTING EAST OF THE AREA THIS AFTERNOON. TUESDAY LOOKS LIKE AN INITIALLY QUIET DAY WITH LIGHT WINDS WITH THE RIDGE OVERHEAD AND CLEAR TO PARTLY CLOUDY SKIES.
SOUTHEAST FLOW AROUND 15 KNOTS WITH SEAS 3-5 FT BECOMING SOUTH LATE TONIGHT AND TUESDAY AHEAD OF A COLD FRONT.
COLD FRONT STILL ON TRACK TO MOVE ACROSS THE FORECAST AREA TUESDAY SPREADING SHOWERS OVER THE ENTIRE FORECAST AREA. ENOUGH INSTABILITY AND CAPE AHEAD OF THE COLD FRONT FOR A SLIGHT CHANCE OF THUNDERSTORMS ACROSS SOUTHWEST IDAHO TUESDAY AFTERNOON. INCREASING CLOUDS OVERNIGHT AHEAD OF A COLD FRONT PASSAGE TOMORROW.
835 PM MDT MON APR 11 2016 WEAK LITTLE WAVE ROUNDING RIDGE AXIS TO OUR WEST THIS EVENING. WARMER TEMPS FOR TOMORROW LOOKS ON TRACK WITH SLIGHT CHANCE OF LATE DAY SHOWERS WEST AS UPPER FLOW BACKS TO THE SOUTHWEST. QUIET WEATHER FOR THE NEXT 18 HOURS AS NORTHWEST FLOW TRANSITIONS QUICKLY TO A SMALL SCALE UPPER RIDGE OVER THE NORTHERN ROCKIES. TUESDAY SHOULD BE DRY TO START WITH AN UPPER RIDGE IN PLACE. THE RIDGE SHIFTS EAST BY AFTERNOON AS A DEEP UPPER LOW MOVES TOWARD THE PACIFIC NORTHWEST COAST.
809 PM EDT MON APR 11 2016 A SLOW MOVING COLD FRONT APPROACHING FROM THE WEST WILL BRING WIDESPREAD SHOWERS AS IT CROSSES THE REGION TONIGHT AND TUESDAY.
757 PM EDT MON APR 11 2016 A SLOW MOVING COLD FRONT APPROACHING FROM THE WEST WILL BRING WIDESPREAD SHOWERS AS IT CROSSES THE REGION TONIGHT AND TUESDAY.
910 PM EDT MON APR 11 2016 A SLOW MOVING COLD FRONT WILL SLIDE SOUTHEAST ACROSS PENNSYLVANIA TONIGHT AND EARLY TUESDAY. HIGH PRESSURE WILL BUILD OVER THE REGION FOR LATER TUESDAY THROUGH THE END OF THE WEEK. 01Z SFC ANALYSIS INDICATES COLD FRONT IS JUST WEST OF KERI. AS COLD FRONT PUSHES THRU. TEMPS WILL COOL BACK DOWN TO NEAR FREEZING OVER THE NW MOUNTAINS BY DAWN AND TO AROUND 50 OVER LANCASTER CO. THE COLD FRONT WILL MOVE EAST OF THE REGION TUESDAY WITH ANY LINGERING SHOWERS LIKELY PUSHING EAST OF LANCASTER CO BY 12Z. HIGHS FROM THE LOW 40S NW TO MID 50S SE WILL BE ABOUT 5-15 DEG BELOW NORMAL. THE UPPER LEVEL TROUGH WILL LIFT OFF TO THE EAST TUESDAY NIGHT.
AT 8 PM, A COLD FRONT STRETCHED FROM JUST SOUTH OF BWG, TO WHITE HOUSE, ASHLAND CITY AND BOLIVAR,TN, AND CONTINUING TO PUSH EAST AT ABOUT 15 KTS. COLD FRONT HAS MOVED THROUGH NASHVILLE AND WILL SLIP ACROSS THE CUMBERLAND PLATEAU DURING THE NEXT COUPLE OF HOURS.
854 PM CDT MON APR 11 2016 WINDS ARE DECOUPLING QUICKLY THIS EVENING AS GRADIENT SLOWLY WEAKENS WITH HIGH PRESSURE BUILDING IN. AS AMPLIFIED 500 MB TROUGH SLIDES EAST SOUTHEAST THROUGH THE REGION. HIGH PRESSURE IS EXPECTED TO SLIDE ACROSS THE REGION TONIGHT AND TUESDAY. THE HIGH WILL BRING QUIET WEATHER TO THE AREA.
MUCH COOLER AIR HAS INVADED THE SOUTH PLAINS BEHIND THE EARLIER FROPA. HEADING INTO TUESDAY ONLY THE TIJUANA SYSTEM WILL HAVE MUCH OF AN EFFECT AS WE TEMPORARILY SEE RIDGING OVERNIGHT TONIGHT FOLLOWED BY A RETURN TO SOUTHWESTERLY FLOW TOMORROW. COLD FRONT HAS PUSHED THROUGH MUCH OF THE CWFA THOUGH A FEW THUNDERSTORMS HAVE DEVELOPED ALONG A LINE FROM PADUCAH TO JUST EAST OF LUBBOCK ALONG AREA OF ENHANCED INSTABILITY WHICH EXTENDS INTO NORTH TEXAS. APPROACHING UPPER LEVEL SYSTEM LOOKS TO BRING ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ACROSS THE AREA ON TUESDAY WITH THE LOW MORE OR LESS TRACKING OVER THE CWFA. LATEST RUNS HAVE NOW COME IN WITH A VERY SMALL CLOSING OF THE LOW RATHER THAN THE PREVIOUS OPEN TROUGH WHICH NOW LENDS TO A BIT MORE SUPPORT FOR THE DEVELOPMENT OF PRECIPITATION.
958 PM EDT MON APR 11 2016 A COLD FRONT WILL MOVE SOUTHEAST ACROSS THE AREA THROUGH MIDNIGHT. HIGH PRESSURE WILL BUILD OVERHEAD ON TUESDAY AND SLOWLY MOVE EAST THROUGH THE REMAINDER OF THE WEEK. COLD FRONT WILL CONTINUE TO MOVE ACROSS THE SOUTHEASTERN PORTION OF THE COUNTY WARNING AREA. HIGH PRESSURE WILL BUILD OVERHEAD ON TUESDAY.
ANTICIPATE LOWS TUE NIGHT TO BE WARMER. POSITION OF SLOW/QUASI-STATIONARY UPPER LOW WILL SET UP A PERSISTENT SOUTH FETCH OF MOISTURE. -HOWERTON LARGE HIGH PRESSURE THAT THIS EVE IS CENTERED OVER THE MANITOBA/NE ND/NW MN BDR WL MOVE RPDLY SE OVERNIGHT & SHUD REACH MN/IA EARLY TUE MRNG. AS THE HIGH APPROACHES NE WINDS <10KTS WL QUICKLY SHIFT TO THE E THEN SE OVERNIGHT WITH KRSL & KGBD BEING THE FIRST TO EXPERIENCE THE SE WSHFT.
1048 PM EDT MON APR 11 2016 A SLOW MOVING COLD FRONT WILL SLIDE SOUTHEAST ACROSS PENNSYLVANIA TONIGHT AND EARLY TUESDAY. HIGH PRESSURE WILL BUILD OVER THE REGION FOR LATER TUESDAY THROUGH THE END OF THE WEEK. 02Z SFC ANALYSIS INDICATES COLD FRONT IS JUST ENTERING NW PA. AS COLD FRONT PUSHES THRU. TEMPS WILL COOL BACK DOWN TO NEAR FREEZING OVER THE NW MOUNTAINS BY DAWN AND TO AROUND 50 OVER LANCASTER CO. THE COLD FRONT WILL MOVE EAST OF THE REGION TUESDAY WITH ANY LINGERING SHOWERS LIKELY PUSHING EAST OF LANCASTER CO BY 12Z. HIGHS FROM THE LOW 40S NW TO MID 50S SE WILL BE ABOUT 5-15 DEG BELOW NORMAL. THE UPPER LEVEL TROUGH WILL LIFT OFF TO THE EAST TUESDAY NIGHT.
1207 AM EDT TUE APR 12 2016 RAIN IS EXPECTED TO END OVERNIGHT AS A COLD FRONT EXITS. RAIN WITH A CROSSING COLD FRONT IS EXPECTED TO END FROM W-E OVERNIGHT AS THE FRONT EXITS THE RGN BY MRNG. BUILDING HIGH PRESSURE SHOULD BRING A CLRG TREND TODAY.
920 PM EDT MON APR 11 2016 PERIODS OF RAIN WILL CONTINUE TONIGHT AS A COLD FRONT MOVES ACROSS THE REGION. AXIS OF THE HIGHER RAIN RATES SHIFTING EAST IN RESPONSE TO THE UPPER-TROUGH AXIS PROPELLING THE SURFACE FRONT FORWARD. HIGH PRESSURE WILL MOVE IN BEHIND THE COLD FRONT. BUT BRINGING IN COOLER AIR FROM THE NORTHWEST.
A QUIET SHORT TERM PERIOD IS IN STORE AS HIGH PRESSURE OVER THE FORECAST AREA EXITS TO THE EAST AND LOW PRESSURE BEGINS TO DEVELOP IN THE LEE OF THE ROCKIES. LOW PRESSURE CONTINUES TO DEVELOP IN THE LEE OF THE ROCKIES. SO EVEN THOUGH THERMAL PROFILES SUGGEST A POSSIBILITY OF FREEZING RAIN.
905 PM EDT MON APR 11 2016 A COLD FRONT SWINGS THROUGH LATE TONIGHT. HIGH PRESSURE BUILDS IN FOR THE SECOND HALF OF THE WEEK. LATEST MODEL SUITE SPEEDING THE PASSAGE OF THE COLD FRONT UP A LITTLE. GUIDANCE EVERYWHERE WITH THE HIGH TEMPS FOR THE DAY. WENT WITH THE WARMER SOLUTIONS TO ACCOUNT FOR DOWNSLOPING. COULD SEE TEMPS END UP COOLER IF THE FRONT SLOWS DOWN. MIGHT BE TOO DRY FOR FROST DEVELOPMENT AND WOULD BE FOCUSED MORE ON JUST AREAS REACHING FREEZING.
732 PM EDT MON APR 11 2016 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING. HIGH PRESSURE WILL WORK INTO THE AREA FOR TUESDAY ALLOWING FOR SEVERAL DAYS OF DRY CONDITIONS. A COLD FRONT WILL WORK ACROSS THE FA THIS EVENING AND COOLER AIR WILL WORK INTO THE REGION. THERE IS A CORRIDOR OF COUNTIES THAT HAVE STARTED THE FROST FREEZE PROGRAM THAT ARE EXPECTED TO REACH DOWN TO FREEZING TEMPERATURES OVERNIGHT. HIGH PRESSURE WILL ALLOW FOR DRY CONDITIONS THROUGH THE SHORT TERM. WENT WITH A FREEZE WATCH ACROSS LOCATIONS THAT HAVE A GREATER POTENTIAL FOR TEMPERATURES TO DROP TO FREEZING OR BELOW.
AT 8 PM, A COLD FRONT STRETCHED FROM JUST SOUTH OF BWG, TO WHITE HOUSE, ASHLAND CITY AND BOLIVAR,TN, AND CONTINUING TO PUSH EAST AT ABOUT 15 KTS. COLD FRONT IS CURRENTLY DRAPED ACROSS NW MIDDLE TENNESSEE, WITH ONLY MINIMAL ACTIVITY OCCURRING ALONG THE BOUNDARY.
SKIES WERE SUNNY THIS AFTERNOON BUT STRONG LOW PRESSURE NORTHEAST OF LAKE SUPERIOR WAS CAUSING GUSTY NORTHWEST WINDS ACROSS THE DVN CWA. CANADIAN HIGH PRESSURE WILL SLIDE SOUTHEAST AND SETTLE OVER THE AREA BY MORNING. MINIMUM TEMPERATURES WILL NOSEDIVE INTO THE MID TO UPPER 20S AT MANY LOCATIONS WITH A FEW SHELTERED/VALLEY SPOTS IN THE LOWER 20S. TEMPERATURES WILL STILL BE BELOW NORMAL WITH AFTERNOON HIGHS IN THE LOWER TO MID 50S.
601 PM CDT MON APR 11 2016 A cold front nearing the Ohio river at mid afternoon will press southeast across KY/TN this evening. A 1026 mb Canadian high pressure over western Manitoba and ridging southward across the western Dakotas will settle into eastern IA by 12Z/7 am Tue, as it strengthens to 1029 mb. As high pressure settles in, breezy nw winds of 15-25 mph and gusts of 25-30 mph this afternoon will diminish to less than 10 mph after sunset. Canadian high pressure will build into the midwest in the wake of the cold front exiting the region. by the later half of the week keeping high pressure anchored over the region.
LOOKS LIKE THE BEST LIFT AND MOISTURE CONVERGENCE IS GOING ON WELL SOUTH AND WEST OF THE GREAT VALLEY THIS EVENING WITH A LARGE AREA OF CONVECTION PROGRESSING STEADILY EAST ACROSS THE LOWER MISSISSIPPI VALLEY INTO THE DEEP SOUTH. PLACED SOME MVFR CEILINGS INTO THE MIX TOWARD DAYBREAK AS COOLER AIR BUILDS IN WITH THE OHIO VALLEY COLD FRONT.
THEN COOLER AND SHOWERY FOR THU INTO FRI. THIS ALLOWED DAYTIME HIGHS TO REACH INTO THE LOW 60S FOR MOST OF THE INTERIOR LOWLANDS. THE RAIN SHOULD INCREASE DURING THE LATE AFTERNOON AND EVENING AS THE WEAK COLD FRONT MOVES ONSHORE. WITH COOL AIR LOFT ASSOCIATED WITH THE UPPER LOW TO SWING IN OVER THE SW WASHINGTON/NW OREGON ON THU. THEN COOLER AIR ALOFT ARRIVES.
925 PM EDT MON APR 11 2016 A SLOW MOVING COLD FRONT APPROACHING FROM THE WEST WILL BRING WIDESPREAD SHOWERS AS IT CROSSES THE REGION TONIGHT AND TUESDAY.
1044 PM EDT MON APR 11 2016 COLD FRONT PASSES THROUGH TONIGHT.
THE COLD FRONT WILL BE CROSSING THE REGION THROUGH THE MORNING HOURS.
LONG WAVE TROUGH PRESSING SLOWLY EAST ACROSS THE EASTERN U. THIS EVENING WITH A SHORTER WAVELENGTH FEATURE RIDING THROUGH THE BASE OF THE TROUGH GENERATING A LARGE WEST THROUGH EAST BAND OF CONVECTION. THERE WILL STILL BE SOME WEAK MOISTURE CONVERGENCE/LIFT IN ASSOCIATION WITH THE COLD FRONT BUILDING TOWARD THE APPALACHIANS AND CANNOT RULE OUT A FEW HUNDREDTHS OF AN INCH OF RAIN LATE TONIGHT SO CATEGORICAL POPS STILL IN ORDER.
WHICH WILL ALLOW COASTAL MINS TO DROP OFF TO A COUPLE CATS COOLER THAN THIS MORNING'S MINS.
THERE WILL ALSO BE SOME GUSTS NEAR 20 KNOTS DEVELOPING AGAIN FOR A FEW HOURS BEFORE HIGH PRESSURE BUILDS INTO THE AREA TUESDAY AFTERNOON. SHORT LIVED WARMING TREND ENDS THIS EVENING AS UPPER HEIGHTS CRATER AND THE ATTENDANT COLD FRONT RACES THROUGH. THIS WILL LAND LOW TEMPERATURES BELOW FREEZING TUESDAY MORNING /MAINLY UPPER 20S/. THE UNDERLYING ENVIRONMENT SEEMINGLY FAVORABLE FOR STRONGER RADIATIONAL COOLING TUESDAY NIGHT WITH HIGH PRESSURE SETTLING THROUGH.
DAYTIME HEATING WILL ALSO BRING NW WIND GUSTS NEAR 20 KNOTS FOR A FEW HOURS BEFORE HIGH PRESSURE BUILDS INTO THE AREA LATE AFTERNOON INTO TUESDAY NIGHT. SHORT LIVED WARMING TREND ENDS THIS EVENING AS UPPER HEIGHTS CRATER AND THE ATTENDANT COLD FRONT RACES THROUGH. THIS WILL LAND LOW TEMPERATURES BELOW FREEZING TUESDAY MORNING /MAINLY UPPER 20S/. THE UNDERLYING ENVIRONMENT SEEMINGLY FAVORABLE FOR STRONGER RADIATIONAL COOLING TUESDAY NIGHT WITH HIGH PRESSURE SETTLING THROUGH.
Latest sfc analysis shows sfc flow continues to veer w/the arrival of the cold front, w/the cold front itself just north of KHOB. Soundings suggest some improvement near the end of the forecast period, but w/the arrival of the upper trough, any improvement will be minimal at best. Convective chances increase as the trough approaches, so we've included a mention late in the forecast. /issued 137 PM CDT MON APR 11 2016/ The series of upper troughs continue with a weak trough moving out of the area today. the next trough Tuesday moving along the AZ/NM/Mex border.
1004 PM EDT MON APR 11 2016 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING. HIGH PRESSURE WILL WORK INTO THE AREA FOR TUESDAY ALLOWING FOR SEVERAL DAYS OF DRY CONDITIONS. HIGH PRESSURE WILL ALLOW FOR DRY CONDITIONS THROUGH THE SHORT TERM. WENT WITH A FREEZE WATCH ACROSS LOCATIONS THAT HAVE A GREATER POTENTIAL FOR TEMPERATURES TO DROP TO FREEZING OR BELOW.
930 PM EDT MON APR 11 2016 RAINY WEATHER IS EXPECTED INTO TUESDAY MORNING, THANKS TO A SLOW MOVING COLD FRONT, AND LOW PRESSURE AREA ALONG IT.
1000 PM EDT MON APR 11 2016 SKIES WILL CLEAR AS A RIDGE OF HIGH PRESSURE BUILDS ACROSS THE SOUTHERN GREAT LAKES AND OHIO VALLEY. BELOW NORMAL TEMPERATURES WILL CONTINUE TUESDAY WITH HIGHS IN THE LOWER 40S TO LOWER 50S.
LIGHT WINDS AND PARTIALLY CLEARING SKIES MAY LEAD TO PATCHY FREEZING FOG NEAR THE KANSAS BORDER BY SUNRISE TUESDAY.
CURRENT SITUATION AND ANALYSIS -- THE LARGE SCALE WEATHER PATTERN FEATURES A DEEP ANTICYCLONE CENTERED OVER SOUTHERN MEXICO WITH RIDGING AND ANTICYCLONIC FLOW EXTENDING NORTHEASTWARD ACROSS SOUTH FLORIDA. A SPRAWLING SURFACE ANTICYCLONE WAS CENTERED OVER THE WESTERN NORTH ATLANTIC. RIDGING SOUTHWESTWARD ACROSS NORTH FLORIDA AND THE GULF OF MEXICO. PROGNOSTIC OVERVIEW -- THE ATLANTIC SURFACE ANTICYCLONE HAS ALREADY BEGUN TO WEAKEN. WITH THE ASSOCIATED RIDGE MOVING SOUTHWARD. A HIGH PRESSURE AREA OVER THE SOUTHEASTERN UNITED STATES WILL SHIFT SOUTHWARD OVERNIGHT THROUGH TUESDAY NIGHT.
Low temperatures Tuesday morning will be several degrees below normal, in the low to mid 30s. Eastern counties will observe the coolest temperatures, at or just below freezing for several hours, under the ridge axis near sunrise. Return flow and south winds will help to keep temperatures above freezing tonight across western zones. Mostly sunny, dry, breezy and warmer.
722 PM EDT MON APR 11 2016 RAIN WILL EXIT LOCATIONS SOUTH OF US ROUTE 24 THROUGH EARLY EVENING AS DRIER AND COOLER AIR MOVES IN FROM THE NORTHWEST. SKIES WILL CLEAR THIS EVENING AS A RIDGE OF HIGH PRESSURE BUILDS ACROSS THE SOUTHERN GREAT LAKES AND OHIO VALLEY.
742 PM EDT MON APR 11 2016 PERIODS OF RAIN WILL CONTINUE TONIGHT AS A COLD FRONT MOVES ACROSS THE REGION. STRONG SOUTHERLY FLOW AHEAD OF A LAGGING COLD FRONT IS FUELING LIGHT TO MODERATE RAIN BI-SECTING THE FORECAST AREA. WITH THE COLD FRONT STILL BACK OVER NORTHWESTERN OHIO. HIGH PRESSURE WILL MOVE IN BEHIND THE COLD FRONT. BUT BRINGING IN COOLER AIR FROM THE NORTHWEST.
745 PM EDT MON APR 11 2016 RAINY WEATHER IS EXPECTED INTO TUESDAY, THANKS TO A SLOW MOVING COLD FRONT, AND LOW PRESSURE AREA ALONG IT.
1025 PM EDT MON APR 11 2016 MOISTURE CONTINUES TO INCREASE IN ASSOCIATION WITH AN APPROACHING COLD FRONT. UPPER LEVEL RIDGING GIVES WAY TO A TROUGH MOVING ACROSS THE EASTERN CONUS. EMBEDDED IN THE BROAD SCALE TROUGH. THE COLD FRONT WILL MOVE ACROSS THE FORECAST AREA TUESDAY EVENING.
727 PM EDT MON APR 11 2016 COLD FRONT PASSES THROUGH TONIGHT.
THIS 00-12Z TIME FRAME IS TRICKY WITH THE TWO SYSTEMS AS WELL AS THE COLD FRONT IMPACTING THE AREA. HIGH TEMPS WILL BE COOLER. TEMPS COULD GET A FEW DEG WARMER. LOWS WILL BE COOLER ESPECIALLY WITH CLEAR SKIES.
709 PM EDT MON APR 11 2016 MOISTURE CONTINUES TO INCREASE IN ASSOCIATION WITH AN APPROACHING COLD FRONT. UPPER LEVEL RIDGING GIVES WAY TO A TROUGH MOVING ACROSS THE EASTERN CONUS. EMBEDDED IN THE BROAD SCALE TROUGH. THE COLD FRONT WILL MOVE ACROSS THE FORECAST AREA TUESDAY EVENING.
BROAD HIGH PRESSURE REMAINS IN PLACE OVER MUCH OF THE WESTERN CONUS THIS EVENING. WITH A WEAK UPPER LOW MEANDERING NEAR THE ARIZONA/MEXICO BORDER. ESPECIALLY OVER THE HIGHER TERRAIN. AS THE AREA BEGINS TO FEEL THE AFFECTS OF AN UPSTREAM TROUGH.
828 PM EDT MON APR 11 2016 HIGH PRESSURE WILL SHIFT FARTHER OFF SHORE THROUGH TONIGHT. SHOWERS AND THUNDERSTORMS WILL RETURN TO THE AREA TUESDAY AND TUESDAY NIGHT AS A COLD FRONT MOVES ACROSS.
705 PM EDT MON APR 11 2016 PERIODS OF RAIN WILL CONTINUE TONIGHT AS A COLD FRONT MOVES ACROSS THE REGION. STRONG SOUTHERLY FLOW AHEAD OF A LAGGING COLD FRONT IS FUELING LIGHT TO MODERATE RAIN BI-SECTING THE FORECAST AREA. WITH THE COLD FRONT STILL BACK OVER NORTHWESTERN OHIO. HIGH PRESSURE WILL MOVE IN BEHIND THE COLD FRONT. BUT BRINGING IN COOLER AIR FROM THE NORTHWEST.
COLD FRONT HAS MOVED THROUGH NASHVILLE AND WILL SLIP ACROSS THE CUMBERLAND PLATEAU DURING THE NEXT COUPLE OF HOURS.
320 PM CST FRI JAN 22 2016 18Z SFC DATA HAS HIGH PRESSURE FROM THE UPPER GREAT LAKES INTO THE SOUTHERN PLAINS WHILE A STORM SYSTEM ORGANIZED IN THE SOUTHEAST UNITED STATES.
1210 PM EST FRI JAN 22 2016 HIGH PRESSURE WILL BE OVER THE GREAT LAKES AREA INTO TOMORROW AS A LOW PRESSURE SYSTEM RIDES NORTHEASTWARD UP THE EAST COAST. LOWS TONIGHT WILL RANGE FROM THE UPPER TEENS IN SOUTHERN MICHIGAN TO THE LOWER 20S ALONG THE OHIO RIVER. NORTHEAST FLOW CONTINUES ACROSS THE AREA AS LOW PRESSURE TRACKS WELL SOUTH OF THE AREA. GENERAL WK LL THERMAL TROUGH ACRS WRN LK ERIE WITHIN MARGINAL INVERSION HGTS ARGUE AGAINST FLURRIES DVLPG ACRS NW OH/NE THIS PD AND WILL HOLD W/PREDECESSORS OPINION. ROBUST MID/UPPER LEVEL RIDGE WILL MAINTAIN VERY QUIET WEATHER THROUGH THE WEEKEND.
TEMPERATURES WILL QUICKLY DROP BY SUNSET INTO THE UPPER 20S AND EVENTUALLY INTO THE LOWER TO MID 20S OVERNIGHT. WHILE SNOW SHOWERS WILL LINGER THROUGH THE REMAINDER OF THE DAY ALONG THE HIGHER TERRAIN WITH NORTHWEST FLOW WINDS.
THIS EVENING THROUGH SATURDAY NIGHT 21Z SURFACE ANALYSIS HAD TROUGH/WARM FRONT FROM EASTERN MT THROUGH THE BLACK HILLS INTO FAR WESTERN NE. UPPER RIDGE MOVING FROM THE ROCKIES INTO THE PLAINS. LOW PRESSURE WILL DEVELOP OVER SOUTH CENTRAL CANADA IN RESPONSE. PUSHING TROUGH/WARM FRONT FRONT THROUGH ENTIRE CWA. BREEZY SPOTS WILL CONTINUE OVER NORTHEAST WY THIS EVENING AND SPREAD INTO THE HIGHER BLACK HILLS/FOOTHILLS AREA GIVEN 3-4MB PRESSURE DIFFERENCE BY 06Z ACROSS THE HIGHER TERRAIN.
348 PM EST FRI JAN 22 2016 LOW PRESSURE OVER THE SOUTHEASTERN US WILL DEEPEN AS IT MOVES OFF THE MIDDLE ATLANTIC COAST TONIGHT. HIGH PRESSURE OVER THE CENTRAL PLAINS AND SOUTHERN ONTARIO WILL BUILD ACROSS THE REGION ON SATURDAY.
LOW PRESSURE TO THE SOUTHEAST WILL CONTINUE TO PULL AWAY FROM THE OHIO VALLEY. ALLOWING HIGH PRESSURE TO BUILD ACROSS THE AREA IN ITS WAKE.
TEMPERATURES HAVE ALSO FALLEN BELOW FREEZING AT HALEYVILLE AND WILL FALL BELOW FREEZING IN MOST LOCATIONS IN THE ADVISORY BY EARLY EVENING SO SOME SLICK TRAVEL CONDITIONS WILL BE POSSIBLE. STILL COULD SEE A FEW LOCATIONS IN NORTHEAST CENTRAL ALABAMA HAVE ACCUMULATIONS OF A HALF INCH TO AN INCH ESPECIALLY IN THE HIGHER TERRAIN AS A VORT MAX DROPS SOUTHWARD THIS EVENING AND SURFACE TEMPERATURES CONTINUE TO COOL.
MOST IF NOT ALL AREAS WILL START OFF CLOUDY WITH THE LOW LEVEL MOISTURE/STRATUS CLOUDS IN PLACE. WHICH SHOULD HELP SCOUR OUT SOME OF THE LOW LEVEL MOISTURE AND ALLOW FOR AT LEAST PARTIAL CLEARING OF THE STRATUS DECK. SO JUST AS THE LOWER CLOUDS LIFT MID LEVEL CLOUDS WILL FILL IN SOME. FEEL COOLER IS THE WAY TO GO REGARDING HIGHS TOMORROW.
TEMPERATURES ARE IN THE LOWER TO MID 70S ALONG THE ISLAND CHAIN. A LOW PRESSURE SYSTEM (1004 MB) IS LOCATED OVER WESTERN GEORGIA. WITH AN ASSOCIATED PRE-FRONTAL TROUGH( COLD FRONT) DRAPED INTO THE EXTREME SOUTHEAST GULF OF MEXICO. AN EXTREMELY MOIST WITH ONLY MODEST INSTABILITY WILL RESULT IN OCCASIONAL RAIN WITH A FEW EMBEDDED SHOWERS AND A STRAY THUNDERSTORM UNTIL THE PRE-FRONTAL TROUGH PASSES THROUGH FROM WEST TO EAST THIS AFTERNOON.
WITH THE HEAVIEST SHOWERS OVER THE LOWER KEYS AND THE ADJACENT NEARSHORE WATERS BOTH NORTH AND SOUTH OUT 20 NM. A PRE-FRONTAL TROUGH EXTENDS FROM SOUTHWEST FLORIDA COAST.
THIS SHOULD HOLD WARMER TEMPERATURES IN PLACE OVER NE ALABAMA AND SOUTHERN MIDDLE TN INTO THE EARLY AFTERNOON HOURS. OVERALL DUE TO TEMPERATURES REMAINING AROUND FREEZING THROUGH ABOUT NOON EVEN IN NW ALABAMA. THE FREEZING LINE (AT 18Z) EXTENDED JUST SOUTH OF BNA. AS THE UPPER LOW SLOWLY MOVES NE THIS AFTN AND TONIGHT.
253 PM CST FRI JAN 22 2016 WV IMAGERY SHOWS OUR REGION UNDER NW FLOW ALOFT SANDWICHED BETWEEN AN AMPLIFIED UPPER RIDGE OVER THE MOUNTAIN WEST/HIGH PLAINS AND THE VERY POTENT UPPER LOW OVER THE ERN CONUS. STRONG PRESSURE GRADIENT BETWEEN THE 1031 MB RIDGE OVER THE PLAINS AND AND 998 MB LOW ALONG THE E COAST HAS MADE FOR RATHER GUSTY NWLY WINDS FOR US TODAY. UPPER LOW OVER THE ERN CONUS IS FCST TO CONTINUE ENEWD. AND THE UPPER RIDGE WILL MOVE OVHD. AS ANOTHER UPPER TROF MOVES ONSHORE ON THE WEST COAST.
245 PM CST FRI JAN 22 2016 UPPER LEVEL RIDGING WILL PROPAGATE EAST OVER ROCKIES THROUGH SAT. WILL INDUCE AND STRENGTHEN LOW-LEVEL TROUGH ACROSS THE HIGH PLAINS WITH WINDS AND SENSIBLE TEMPERATURES TO INCREASE ACCORDINGLY.
A WARM FRONT ACROSS EASTERN MONTANA THIS AFTERNOON WILL PROPAGATE ACROSS WESTERN AND CENTRAL NORTH DAKOTA LATE TONIGHT THROUGH EARLY SATURDAY MORNING.
424 PM EST FRI JAN 22 2016 LOW PRESSURE MOVING INTO THE SOUTHERN APPALACHIANS WILL WEAKEN TONIGHT AS ANOTHER LOW DEVELOPS ALONG THE MID ATLANTIC COAST. HIGH PRESSURE WILL BUILD ACROSS THE REGION DURING THE WEEKEND. CLOUDS WILL DECREASE FROM NORTHWEST TO SOUTHEAST THROUGH THE DAY AS HIGH PRESSURE BEGINS TO BUILD IN. CENTER OF THE HIGH WILL PASS SOUTH OF THE AREA WITH MAINLY CLEAR SKIES AND RELATIVELY GOOD RADIATIONAL COOLING CONDITIONS ESPECIALLY WHERE FRESH SNOW PACK WILL BE.
Most locations remained near or just above freezing into the afternoon. Upper level ridging will develop over the central U. Temperatures will rise above freezing Saturday but remain on the chilly side.
RH progs still have higher rh values shifting southeast across the area today as the low lifts to the northeast so have trended with higher clouds during the remainder of the day. This combined with the snow cover over much of the area will keep afternoon temperatures from climbing above freezing this afternoon.
1205 PM CST FRI JAN 22 2016 PRECIP ALONG AND SOUTH OF I80 EARLY THIS MORNING MAY BE A MIX OF FREEZING DRIZZLE AND SCATTERED FLURRIES. THE REGION IS ON THE BACK SIDE OF AN UPPER LEVEL TROUGH NOW MOVING EAST OF THE AREA. THEN DRY THEREAFTER AS HIGH PRESSURE CONTINUES TO BUILD SOUTHWARD WITH UPPER RIDGING DEVELOPING.
AS THE HIGH MOVES SOUTH. THE LEE TROUGH ALONG THE FRONT RANGE DEEPENS AND EVENTUALLY FORMS A CLOSED LOW OVER SOUTHEAST COLORADO BY LATE SATURDAY. WITH THE UPPER RIDGE ALSO REMAINING IN PLACE OVER THE CENTRAL AND SOUTHERN HIGH PLAINS AS IT FLATTENS WITH THE APPROACH OF THE NEXT UPPER TROUGH OVER THE WESTERN U. HIGH TEMPERATURES WILL BE 10 TO 15 DEGREES WARMER AS A RESULT ACROSS THE FORECAST AREA.
WARM FRONTAL PASSAGE LATE TONIGHT FOLLOWED BY A COLD FRONTAL PASSAGE WITH THE UPPER TROUGH LATE SATURDAY MORNING WILL BE MORE FAVORABLE FOR PRECIPITATION IN THE LOWER VALLEYS. HAVE ALSO INCREASED TEMPERATURES TODAY AS SOUTHEAST WINDS HAVE KEPT TEMPERATURES IN THE LOW TO MID 40S THIS MORNING IN THE WESTERN SNAKE RIVER PLAIN.
THE LOW CLOUDS HAVE BROKEN UP ACROSS MOST OF THE EAST THIS AFTERNOON AND WERE SHOWN ON SATELLITE TO BE BREAKING UP SOME ACROSS CENTRAL AND NORTH CENTRAL SD. THIS WILL BRING MUCH WARMER AIR TO THE CWA ON SATURDAY WITH HIGHS MAINLY IN THE 30S AND 40S. A WEAK CANADIAN COLD FRONT WILL THEN PUSH ACROSS THE CWA SATURDAY NIGHT.
Update will attempt to address the low cloud cover through the afternoon. with the low cloud deck extending through central OK and much of southern KS being more troublesome.