Aikyam-Lab/Synoptic-Bench huggingface dataset:
337 PM CDT MON SEP 28 2015 COLD FRONTAL BOUNDARY HAS PUSHED INTO THE NORTHWESTERN CWA. THE COLD FRONT IS EXPECTED TO CONTINUE TO PUSH SSE THROUGH THE CWA TONIGHT. STILL SHOULD SEE MIN TEMPS SEVERAL DEGREES COOLER THAN IN PREVIOUS NIGHTS WITH UPPER 40S EXPECTED NORTH TO AROUND 60 SOUTH. COOLER AND DRIER AIR FILTERS IN BEHIND THIS BOUNDARY FOR LATE TUESDAY THROUGH THE END OF THE PERIOD AS A LARGE ONTARIO HIGH PRESSURE CELL BECOMES ESTABLISHED TO THE NORTH AND EAST OF THE STATE. EASTERLY FLOW OFF THIS HIGH WILL RESULT IN LITTLE VARIABILITY IN THE LOW LEVEL THERMAL PROFILES WITH 850MB TEMPS ONLY FLUCTUATING FROM +3 TO +7 C FOR THE REMAINDER OF THE WEEK AND WEEKEND.
A WEAK COLD FRONT MAY APPROACH KDHT AND KGUY TOMORROW MORNING BUT TIMING IS UNCERTAIN.
1213 PM CDT MON SEP 28 2015 ZONAL FLOW ALOFT CONTINUES OVER OUR REGION WITH A LARGE UPPER TROUGH OVER CENTRAL CANADA AND A RIDGE OF HIGH PRESSURE EXTENDING SW TO NE ACROSS THE DESERT SOUTHWEST. A SFC COLD FRONT CURRENTLY EXTENDS FROM THE ARROWHEAD OF MINNESOTA SOUTHEAST INTO SOUTHEASTERN SOUTH DAKOTA AND EVENTUALLY INTO THE NEBRASKA PANHANDLE. MEDIUM RANGE MODELS CONTINUE TO BRING A LARGE CLOSED UPPER LEVEL LOW INTO THE GREAT BASIN LATE IN THE WEEK HOWEVER TIMING/LOCATION IS STILL UNCERTAIN. A COLD FRONT DROPPING THROUGH EASTERN NEBRASKA WILL BRING SHOWERS AND AREAS OF MVFR CIGS/VSBYS OVERNIGHT.
A LARGE UPPER LEVEL LOW REMAINS OVER THE NORTHWESTERN GULF OF MEXICO.
BUT STRONG MOISTURE FLOW IN THE LOW-LEVELS IS RESULTING IN RAIN SHOWERS BACK-FILLING ON RADAR. AND STRENGTHEN AS A BROAD UPPER TROF BEGINS TO DIP INTO THE UPPER MID-WEST AND THE PRESSURE GRADIENT TIGHTENS. THIS ALONG WITH HIGH FREEZING LEVELS. TAX PRECIPITATION WILL REMAIN LIGHT AND SCATTERED OVERNIGHT BUT WILL INCREASE IN COVERAGE TUESDAY MORNING AS DEEP LAYER MOISTURE INCREASES AHEAD OF A COLD FRONT PROGGED TO CROSS THE REGION LATE TUESDAY AFTERNOON AND THROUGH THE EVENING. AS THE UPPER LEVEL TROUGH REMAINS THE DOMINANT FEATURE.
104 PM CDT MON SEP 28 2015 Subtle mid-level height rises across the area will act to keep skies mostly clear today aside from a few cirrus clouds to the south, and will also allow temperatures to rise into the lower 80s across the forecast area. A cold front will slide into the region from the north on Tuesday, with some fairly thick post-frontal moisture bringing quite a bit of cloud cover from north to south during the day. Sprawling high pressure behind the front will dominate the Great Lakes and Mississippi Valleys for the remainder of the week, giving our area cool northeasterly low-level flow.
LOW PRESSURE MOVES THROUGH THE REGION MID-WEEK, BRINGING A SLIGHT COOL DOWN, THE POTENTIAL FOR GUSTY WINDS, AND POSSIBLY SOME RAIN.
THE AREA OF LOW PRESSURE OVER THE GULF OF MEXICO CONTINUES TO MOVE NORTHWARD TOWARD THE NORTHEASTERN GULF COAST REGION. WINDS HAVE STARTED TO BECOME MORE SOUTHERLY SO FAR THIS AFTERNOON AND WILL BECOME MORE SOUTHWESTERLY TONIGHT AS THE LOW MOVES NORTHWARD. THE AREA OF LOW PRESSURE WILL MOVE ASHORE TUESDAY AFTERNOON. RAIN CHANCES WILL BE ON A DOWNWARD TREND THROUGH THE AFTERNOON AND INTO THE EVENING AS THE LOW CONTINUES TO PULL AWAY FROM THE AREA. IN THE MID LEVELS THE CUTOFF LOW WILL HAVE OPENED UP BY TUESDAY NIGHT WITH THE LONG WAVE TROUGH AXIS MOVING SLOWLY EAST ACROSS THE EASTERN U.
1127 AM MDT MON SEP 28 2015 THE UPR RIDGE OVERHEAD HAS BEEN FLATTENED BY A DISTURBANCE IN THE FLOW TO THE NORTH OF THE FORECAST AREA. MOST NUMEROUS OVER AND NEAR THE HIGHER TERRAIN. TEMPERATURES ARE EXPECTED TO BE SOME 5-15F COOLER THAN MONDAY.
144 PM EDT MON SEP 28 2015 THE STRING OF SUMMER LIKE DAYS WILL CONTINUE TODAY BUT A CHANGE TO MORE AUTUMN LIKE WEATHER WILL BEGIN TUESDAY AS A COLD FRONT MOVES THROUGH THE REGION.
THIS MOISTURE FEED WILL CONTINUE AND STRENGTHEN AS A BROAD UPPER TROF BEGINS TO DIP INTO THE UPPER MID-WEST AND THE PRESSURE GRADIENT TIGHTENS. ALONG WITH HIGH FREEZING LEVELS. GUIDANCE HAS CONTINUED A SLOWING TREND TO THE PASSAGE OF A COLD FRONT ON TUESDAY.
1056 AM PDT MON SEP 28 2015 AN UPPER RIDGE IS OVER THE AREA WITH AN UPPER LOW WELL OFFSHORE OF THE NORTHERN CALIFORNIA COAST. AT THE SURFACE A THERMAL TROUGH EXTENDS ALONG THE OREGON COAST. THE RIDGE WILL REMAIN IN PLACE TODAY WHILE THE SURFACE THERMAL TROUGH WILL SHIFT INLAND DURING THE DAY. ON TUESDAY, THE RIDGE SHIFTS EASTWARD SLIGHTLY BUT STILL REMAINS IN PLACE DURING THE DAY. OFFSHORE THE UPPER LOW WILL SHIFT EASTWARD AND TOWARDS THE AREA. EXPECT ANOTHER WARM AND DRY DAY FOR INLAND AREAS ON TUESDAY WITH HIGH TEMPERATURES EXPECTED TO BE ONLY A COUPLE DEGREES COOLER THAN TODAY.
340 PM CDT MON SEP 28 2015 A cold front located over southern Nebraska could be the impetus for showers and and a few thunderstorms as if spreads into northern Kansas overnight.
AN UPPER LEVEL LOW WILL BEGIN TO MOVE NORTHEAST TOWARD THE AREA LATE TONIGHT. BEFORE OPENING INTO A MID-LEVEL TROUGH ON TUESDAY. MODELS ARE SHOWING TROPICAL MOISTURE MOVING ACROSS THE AREA TUESDAY AND TUESDAY NIGHT AS A COLD FRONT ALSO PUSHES THROUGH TUESDAY NIGHT.
335 PM CDT MON SEP 28 2015 UPPER LEVEL LOW OVER SE TEXAS CONTINUES TO SUPPORT SCATTERED SHOWERS AND THUNDERSTORMS. THE FIRST AREA OF CONVECTION FROM CONROE TO CROCKETT SHOULD MOVE WEST AROUND THE UPPER LOW THIS EVENING. THIS AREA OF CONVECTION ASSOCIATED WITH A NON TROPICAL LOW PRESSURE SYSTEM HAS CONTINUED TO PRODUCE HIGH RAIN RATES AND SEVERAL INCHES OF RAINFALL IN THE GULF.
But, this is showing that the approaching trough does have some moisture with it.
WHILE SCATTERED CONVECTION FIRES UP OVER THE LOWER TEXAS COASTAL WATERS. WHILE THE TROUGH MENTIONED PREVIOUSLY CONTINUES TO PROGRESS THROUGH THE REMAINDER OF DEEP SOUTH TEXAS AND THE RIO GRANDE VALLEY. TUESDAY NIGHT WITH RIDGE BUILDING ACROSS THE AREA.
MANY SPOTS NORTH OF I-40 HAVE REACHED THE LOW 80S WHILE OTHERS SOUTH OF I-40 ARE ONLY TOPPING OUT IN THE MIDDLE 70S. AN UPPER LEVEL LOW NEAR HOUSTON. AN UPPER LEVEL JET ROUNDING THE BASE OF THE UPPER LEVEL TROUGH WILL HELP WITH DIVERGENCE ALOFT.
RAISED TEMPS ACROSS WESTERN ZONES AS CLEAR SKIES WERE LEADING TO SIGNIFICANT WARMER ACROSS THIS AREA. THE WEAK UPPER LOW WHICH SPREAD A CLOUDS INTO THE REGION YESTERDAY HAS DISSIPATED. WITH DEWPOINTS IN THE LOWER 60S OVER THE REGION. THE COLD FRONT WHICH WILL MOVE TOWARD OUR CWA TODAY. AND HIGHS CONTINUE TO APPEAR LIKELY TO REACH THE LOWER 80S IN MOST LOCATIONS. THE COLD FRONT WILL REACH THE NORTHWESTERN COUNTIES. SHOULD BE THROUGH THE HIGHWAY 30 CORRIDOR. SFC COLD FRONT TO MOVE THROUGH DURING THE MORNING CREATING NE WIND GUSTS UP TO 20 MPH.
THE RIDGE TO OUR SOUTH WILL WEAKEN SLIGHTLY THROUGH THE END OF THE WORK WEEK AS THE AFOREMENTIONED UPPER-LEVEL LOW TRAVERSES EAST ACROSS NORTHERN CA. THE ECMWF AND CANADIAN FAVOR LOW PRESSURE ALONG THE WEST COAST. WHICH WOULD CREATE COOLER WEATHER FOR SW CA. WHILE THE GFS FAVORS RIDGING ALOFT AND WARMER WEATHER. CONFIDENCE IN TIMING OF THE LOW CLOUDS AT KSAN TONIGHT IS MODERATE.
631 PM EDT MON SEP 28 2015 THE AVIATION SECTION HAS BEEN UPDATED BELOW SHOWER CHANCES WILL BE INCREASING OVERNIGHT TONIGHT AND TUESDAY AS A COLD FRONT APPROACHES FROM THE NORTHWEST. THE FRONT SHOULD MOVE THROUGH CENTRAL INDIANA BY TUESDAY EVENING ALLOWING THE SHOWERS TO END AND COOLER AND DRYER AIR TO MOVE IN. THE WEEKEND LOOKS MOSTLY DRY AND COOL WEATHER WITH HIGH PRESSURE OVER THE AREA. THEN MODELS AGREE A COLD FRONT WILL DROP SOUTHEAST TO JUST NORTHWEST OF CENTRAL INDIANA 12Z TUESDAY. ACROSS OUR SOUTHERN HALF COURTESY OF AN UPPER LOW NEAR HOUSTON TEXAS. WITH BULK OF THE MOISTURE THERE WITH AN UPPER LOW EJECTED SHORT WAVE ALONG THE OHIO RIVER. WENT AT OR ABOVE 12Z MOS WITH OVERNIGHT LOWS IN THE LOWER TO MID 60S.
330 PM CDT MON SEP 28 2015 SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE SOUTHEAST AND EXTREME EASTERN ZONES TONIGHT AS AN UPPER LOW CONTINUES TO ROTATE ACROSS THE UPPER TEXAS COAST. THE LOW IS PROGGED TO LIFT INTO LOUISIANA ON TUESDAY AND BECOME ABSORBED INTO A DEEPENING UPPER TROUGH ACROSS THE EASTERN CONUS. UPPER LEVEL HIGH PRESSURE WILL BUILD IN FROM THE WEST TUESDAY NIGHT.
411 PM CDT MON SEP 28 2015 LATEST WV IMAGERY AND UA ANALYSIS SHOWS LARGE UPPER LOW CONTINUING TO SPIN OVER THE UPPER TX COAST. DECENT MOISTURE WILL REMAIN OVER THE REGION THROUGH TUESDAY AS THE UPPER LOW AND ITS SFC COUNTERPART SLOWLY MOVE EAST.
POTENTIAL FOR MINOR COASTAL FLOODING AROUND THE HIGH TIDE. OVERNIGHT LOWS WILL BE IN THE LOW/MID 70S. (PREVIOUS DISCUSSION) UPPER TROUGH EXTENDING FROM THE MID ATLC THROUGH THE WESTERN GOMEX EARLY IN THE PERIOD WILL ADVANCE SLOWLY EASTWARD AND ACROSS THE FLORIDA PENINSULA EARLY ON FRI. LIGHT SE WINDS ACROSS THE WATERS BECOMES S/SW INTO TUE AS LOW PRESSURE OVER THE EASTERN GULF MOVES NORTHWARD.
TEMPS COOL BEHIND THE FRONT WITH HIGHS IN THE LOW TO MID 80S AND LOWS IN THE 50S. CURRENT COLD FRONT IS SLOWLY MAKING ITS WAY THROUGH MIDDLE TN AS EVIDENT BY A WIND SHIFT TO THE NORTH.
TWEAKED THE HOURLY VALUES TO ACCOUNT FOR THE SLIGHTLY WARMER TEMPERATURES. BUT THE COOLER AIR WAS STILL WELL OFF TO THE NORTHWEST. A COLD FRONT SLIDING SLOWLY INTO THE AREA WILL KEEP NORTH WINDS UP A BIT THROUGH THE NIGHT AT GLH/GWO/CBM/GTR/JAN/HKS AND IN THOSE SPOTS NO LATE NIGHT VIS RESTRICTIONS ARE EXPECTED.
MID LEVEL S/WV TROUGH WILL BRING SOME ELEVATED CLOUDS THROUGH THE AREA TONIGHT.
BREAKS IN CLOUDS COMBINED WITH LOW DEW POINTS WILL ALLOW SHELTERED LOW LYING AREAS TO DROP INTO THE LOWER 40S AND UPPER 30S AGAIN TONIGHT. LEE TROUGHING WILL SET UP LATER IN THE DAY. THE FIRST PART OF A TWO-PART COLD FRONT WILL PUSH E INTO THE REGION SUN NIGHT. IT WILL BE A LITTLE COOLER WITH SLIGHTLY HIGHER RELATIVE HUMIDITIES ON MON THAN IT WILL BE ON SUN.
1145 PM CDT SAT SEP 19 2015 HIGH PRESSURE OVER THE CENTRAL PLAINS INTO THE UPPER MISSISSIPPI RIVER VALLEY REGION WAS PRODUCING A PICTURE PERFECT AUTUMN-LIKE DAY ACROSS THE FORECAST AREA WITH SUNNY SKIES AND COMFORTABLY COOL TEMPERATURES IN THE 65-70 DEGREE RANGE. CENTER OF THIS HIGH PRESSURE DRIFTS SLOWLY EAST TOWARD EASTERN IA/WESTERN IL TONIGHT. ANOTHER NEGATIVE FACTOR FOR FOG DEVELOPMENT WILL BE A BATCH OF CIRRUS ASSOCIATED WITH AN UPPER LEVEL TROUGH MOVING INTO THE AREA. PLAN ON COOL OVERNIGHT LOWS IN THE LOWER 40S ACROSS THE SANDY/BOG COUNTRY OF CENTRAL WI.
A WEAK COLD FRONT REMAINS SITUATED ACRS NRN LA INTO NE TX.
OVERNIGHT LOWS WILL BE A LITTLE WARMER THAN LAST NIGHT DUE TO THE WARMER AIRMASS. MODELS HAVE A WEAK UPPER TROUGH MOVE ACROSS TONIGHT.
738 PM EDT SAT SEP 19 2015 A COLD FRONT WILL MOVE ACROSS THE AREA THIS EVENING, BRINGING SHOWERS AND THE CHANCE FOR ISOLATED THUNDERSTORMS.
OBSERVATIONS SHOW TEMPERATURES ARE RUNNING SEVERAL DEGREES WARMER THAN LAST NIGHT.
Cool/dry early Autumn weather is occurring today in the wake of the cold front that moved through last night. A more amplified upper level pattern will develop over the eastern half of the CONUS by midweek with a strong upper level ridge expected to build over the area. Various guidance solutions diverge by late in the week, but in general it still looks to be warmer than normal.
WEAK COLD FRONT APPROACHING THE AREA THIS EVENING. CURRENT FORECAST LOOKS GOOD WITH A FEW SHOWERS NORTH AND NORTHEAST SECTIONS OF THE FORECAST AREA AND SKIES BECOMING MOSTLY CLOUDY AS THE COLD FRONT MOVES THROUGH.
1149 PM CDT SAT SEP 19 2015 Quiet and unseasonably cool conditions are expected across central and southeast Illinois overnight as high pressure begins to build into the area. Cold front from last night has moved well east of the area and high pressure is now slowly moving east through the plains and will influence the weather across central and southeast Illinois tonight and beyond. With high pressure, wind speeds will remain well below 10 mph. Temps will become quite cool tonight with CWA being on the cooler side of the ridge.
1148 PM CDT SAT SEP 19 2015 Very quiet weather pattern now in place over the Lwr Missouri Valley as high pressure has firm control the weather pattern. albeit slightly warmer with high pressure slowly tracks off to our northeast allowing for a gradual return of southeasterly winds. Highs on Sunday should range into the lower to middle 70s across much of the area.
1017 PM EDT SAT SEP 19 2015 A COLD FRONT WILL MOVE ACROSS THE AREA THIS EVENING, BRINGING SHOWERS AND THE CHANCE FOR ISOLATED THUNDERSTORMS.
654 PM CDT SAT SEP 19 2015 SFC RIDGING WAS MOVING THROUGH THE FORECAST AREA AT 1830Z. SOME CI WAS ALSO SPREADING INTO THE AREA FROM THE WEST AHEAD OF A TROF OVER EASTERN MT AND CENTRAL SD. THE SD TROF WILL MOVE OVER THE REGION TONIGHT WHILE THE MT TROF REACHES THE EASTERN DAKOTAS BY 12Z SUNDAY. SFC RIDGING HOWEVER. THOSE SAME UPPER LEVEL TROFS WILL MOVE VERY SLOWLY EASTWARD ON SUNDAY.
/ISSUED 300 PM CDT SAT SEP 19 2015/ A cold front has passed completely through the forecast area today.
THE WARMING TREND WILL REACH AN END ON SUNDAY AFTERNOON AS THE COASTAL THERMAL TROUGH MOVES FARTHER INLAND.
711 PM CDT SAT SEP 19 2015 A COLD FRONT IS DRAPED ALONG THE I-20 CORRIDOR AND MAY TOUCH OFF A FEW SHWRS UNTIL MIDNIGHT. THE FRONT WILL MOVE SOUTH WITH AN UPPER LOW IN THE NW FLOW FOR SUNDAY PM. MOISTURE POOLING AHEAD OF THE FRONT COMBINED WITH INCREASED CLOUD COVER TO ALLOW FOR SLIGHTLY WARMER LOW TEMPERATURES COMPARED TO THIS MORNING WITH LOWS IN THE MID TO UPPER 60S.
702 PM EDT SAT SEP 19 2015 A COLD FRONT WILL MOVE ACROSS THE AREA THIS EVENING, BRINGING SHOWERS AND THE CHANCE FOR ISOLATED THUNDERSTORMS.
618 PM CDT SAT SEP 19 2015 HIGH PRESSURE OVER THE CENTRAL PLAINS INTO THE UPPER MISSISSIPPI RIVER VALLEY REGION WAS PRODUCING A PICTURE PERFECT AUTUMN-LIKE DAY ACROSS THE FORECAST AREA WITH SUNNY SKIES AND COMFORTABLY COOL TEMPERATURES IN THE 65-70 DEGREE RANGE. CENTER OF THIS HIGH PRESSURE DRIFTS SLOWLY EAST TOWARD EASTERN IA/WESTERN IL TONIGHT. ANOTHER NEGATIVE FACTOR FOR FOG DEVELOPMENT WILL BE A BATCH OF CIRRUS ASSOCIATED WITH AN UPPER LEVEL TROUGH MOVING INTO THE AREA. PLAN ON COOL OVERNIGHT LOWS IN THE LOWER 40S ACROSS THE SANDY/BOG COUNTRY OF CENTRAL WI.
THESE OUTLFLOW BOUNDARIES IN COMBINATION WITH A WEAK COLD FRONT CURRENTLY ACROSS THE I20 CORRIDOR COULD PROVIDE MORE ISOLATED ACTIVITY IN THE AREA. /ISSUED 711 PM CDT SAT SEP 19 2015/ A COLD FRONT IS DRAPED ALONG THE I-20 CORRIDOR AND MAY TOUCH OFF A FEW SHWRS UNTIL MIDNIGHT. THE FRONT WILL MOVE SOUTH WITH AN UPPER LOW IN THE NW FLOW FOR SUNDAY PM. MOISTURE POOLING AHEAD OF THE FRONT COMBINED WITH INCREASED CLOUD COVER TO ALLOW FOR SLIGHTLY WARMER LOW TEMPERATURES COMPARED TO THIS MORNING WITH LOWS IN THE MID TO UPPER 60S.
1137 PM CDT SAT SEP 19 2015 Cool/dry early Autumn weather is occurring today in the wake of the cold front that moved through last night. A more amplified upper level pattern will develop over the eastern half of the CONUS by midweek with a strong upper level ridge expected to build over the area. Various guidance solutions diverge by late in the week, but in general it still looks to be warmer than normal.
659 PM CDT SAT SEP 19 2015 Cold front from last night has moved well east of the area and high pressure is now slowly moving east through the plains and will influence the weather across central and southeast Illinois tonight and beyond. With high pressure, wind speeds will remain well below 10 mph. Temps will become quite cool tonight with CWA being on the cooler side of the ridge.
749 PM EDT SAT SEP 19 2015 WEAK COLD FRONT PASSING THROUGH.
A FEW SHOWERS HAVE DEVELOPED AHEAD OF THE APPROACHING COLD FRONT. COLD FRONT PASSAGE WILL BRING SOME MIDDLE LEVEL CLOUDS.
1046 PM EDT SAT SEP 19 2015 LIGHT WINDS AND CLEAR SKIES ARE EXPECTED OVERNIGHT INTO SUNDAY AS HIGH PRESSURE BUILDS IN. HELD ON TO A MORE OPTIMISTIC FCST FOR NOW (MOSTLY SUNNY AND WARMER HIGHS NEAR 70F). RIDGING SFC AND ALOFT BLDS THROUGH THE OH VALLEY THIS PD. THERMAL TROUGH POSITIONED FM THE LAKES NEWD ACRS NEW ENGLAND WILL ERODE OUT QUICKLY W/MODERATING TEMPS BACK ABV NORMAL BY TUE THROUGH THE END OF THE PD. STRONG RIDGE OF HIGH PRESSURE WILL ENSURE VFR CONDITIONS THROUGH THE PERIOD.
/ISSUED 434 PM CDT SAT SEP 19 2015/ AN UPPER LEVEL RIDGE REMAINS ACROSS TEXAS. COURTESY OF A COOLER AIRMASS AND UPSLOPE FLOW. THE POTENTIAL FOR THUNDERSTORMS REMAINS THROUGH MUCH OF SUNDAY AS THE UPPER LEVEL RIDGE SUBSIDES SOMEWHAT AND NORTHWEST FLOW PREVAILS ACROSS THE AREA. UPPER LEVEL RIDGING WILL START BUILDING AGAIN ACROSS THE PANHANDLES AND BRING ABOVE NORMAL TEMPERATURES BACK.
948 PM CDT SAT SEP 19 2015 156 PM CDT FAIR WEATHER CUMULUS CLOUDS HAVE DEVELOPED ACROSS THE REGION AS THE COLD FRONT IS NOW WELL EAST OF THE REGION STRETCHED ACROSS CENTRAL OHIO THROUGH WESTERN KENTUCKY. THE HIGH BUILDS OVERHEAD THROUGH THE NIGHT LEADING TO CLEAR SKIES AND WEAK WINDS. THE LOW TEMPS I INHERITED LOOKED VERY GOOD SO ONLY MADE A FEW MINOR ADJUSTMENTS TO LOWER THE TYPICAL LOW SPOTS BY A DEGREE OR TWO. THE HIGH SHIFTS NE OF THE REGION OVER SOUTHEAST QUEBEC BY SUNDAY EVENING. BUT IT WILL LEAD TO A BEAUTIFUL LATE SUMMER/EARLY FALL DAY WITH HIGHS IN THE LOW 70S AWAY FROM THE LAKE. JEE 156 PM CDT THE BROAD UPPER LEVEL TROUGH CURRENTLY OVER THE NORTHERN PLAINS WILL BE OVER THE LOCAL AREA TO START THE PERIOD.
1239 AM EDT SUN SEP 20 2015 THE AVIATION SECTION HAS BEEN UPDATED BELOW COOLER AND DRIER WEATHER RETURNS TONIGHT AS HIGH PRESSURE BUILDS ACROSS THE OHIO VALLEY. THE HIGH WILL REMAIN A DOMINANT INFLUENCE THROUGHOUT THE UPCOMING WEEK WITH DRY PLEASANT WEATHER. THE ARRIVAL OF AN UPPER RIDGE WILL ALLOW FOR A SLOW WARMING TREND THROUGH THE WORK WEEK. THE COLD FRONT HAS PUSHED SOUTHEAST OF THE FORECAST AREA EARLY THIS AFTERNOON AND AS DRIER AIR FILTERS INTO THE REGION. SKIES WILL CLEAR THIS EVENING AS THE HIGH EXPANDS EAST INTO THE OHIO VALLEY WITH DEEP SUBSIDENCE. GENERALLY TRENDED CLOSER TO THE MORE VARIABLE AND COOLER METMOS GUIDANCE WHICH USUALLY CAPTURES THE RADIATIONAL COOLING IMPACTS BETTER.
722 PM EDT SAT SEP 19 2015 COOLER AND DRIER AIR WILL CONTINUE TO FUNNEL IN WITH GUSTY NORTHWEST WINDS THIS AFTERNOON. LIGHT WINDS AND MAINLY CLEAR SKIES ARE EXPECTED TONIGHT INTO SUNDAY AS HIGH PRESSURE BUILDS IN. HELD ON TO A MORE OPTIMISTIC FCST FOR NOW (MOSTLY SUNNY AND WARMER HIGHS NEAR 70F). RIDGING SFC AND ALOFT BLDS THROUGH THE OH VALLEY THIS PD. THERMAL TROUGH POSITIONED FM THE LAKES NEWD ACRS NEW ENGLAND WILL ERODE OUT QUICKLY W/MODERATING TEMPS BACK ABV NORMAL BY TUE THROUGH THE END OF THE PD. STRONG RIDGE OF HIGH PRESSURE WILL ENSURE VFR CONDITIONS THROUGH THE PERIOD.
/ISSUED 157 PM CDT SAT SEP 19 2015/ SOUTHERLY WINDS TONIGHT NORTH OVER THE COLD FRONT, WHICH HAS PASSES INTO NORTH TEXAS, ARE EXPECTED TO CREATE SUFFICIENT LIFT TO GENERATE RAIN AND A FEW THUNDERSTORMS OVER SOUTHERN AND CENTRAL OKLAHOMA EARLY SUNDAY.
1034 PM EDT SAT SEP 19 2015 AVIATION SECTION HAS BEEN UPDATED BELOW COOLER AND DRIER WEATHER RETURNS TONIGHT AS HIGH PRESSURE BUILDS ACROSS THE OHIO VALLEY. THE HIGH WILL REMAIN A DOMINANT INFLUENCE THROUGHOUT THE UPCOMING WEEK WITH DRY PLEASANT WEATHER. THE ARRIVAL OF AN UPPER RIDGE WILL ALLOW FOR A SLOW WARMING TREND THROUGH THE WORK WEEK. THE COLD FRONT HAS PUSHED SOUTHEAST OF THE FORECAST AREA EARLY THIS AFTERNOON AND AS DRIER AIR FILTERS INTO THE REGION. SKIES WILL CLEAR THIS EVENING AS THE HIGH EXPANDS EAST INTO THE OHIO VALLEY WITH DEEP SUBSIDENCE. GENERALLY TRENDED CLOSER TO THE MORE VARIABLE AND COOLER METMOS GUIDANCE WHICH USUALLY CAPTURES THE RADIATIONAL COOLING IMPACTS BETTER.
Winds have turned light across the area as high pressure centered over northern Missouri continues to move eastward this evening. Low temperatures will be cooler tonight than the previous night, and around 5 degrees below normal.
805 PM EDT SAT SEP 19 2015 A COLD FRONT WILL DEPART TO THE EAST OVERNIGHT. THE COLD FRONT HAS PASSED THE PITTSBURGH METRO AREA AS OF 8 PM. FRIES BUILDING HIGH PRESSURE WILL PROVIDE DRY AND COOLER CONDITIONS SUNDAY.
900 PM CDT SAT SEP 19 2015 Quiet and unseasonably cool conditions are expected across central and southeast Illinois overnight as high pressure begins to build into the area. Cold front from last night has moved well east of the area and high pressure is now slowly moving east through the plains and will influence the weather across central and southeast Illinois tonight and beyond. With high pressure, wind speeds will remain well below 10 mph. Temps will become quite cool tonight with CWA being on the cooler side of the ridge.
A FEW SHOWERS HAVE DEVELOPED AHEAD OF THE APPROACHING COLD FRONT. COOLER TEMPERATURES WILL BE FELT ACROSS THE NORTH ON SUNDAY AFTERNOON WITH HIGHS IN THE LOWER TO MID 80S. TO THE LOWER 90S SOUTH.
THE RIVER MAY REACH THE LOWER THRESHOLD OF ACTION STAGE SUNDAY MORNING.
705 PM EDT SAT SEP 19 2015 AVIATION SECTION HAS BEEN UPDATED BELOW COOLER AND DRIER WEATHER RETURNS TONIGHT AS HIGH PRESSURE BUILDS ACROSS THE OHIO VALLEY. THE HIGH WILL REMAIN A DOMINANT INFLUENCE THROUGHOUT THE UPCOMING WEEK WITH DRY PLEASANT WEATHER. THE ARRIVAL OF AN UPPER RIDGE WILL ALLOW FOR A SLOW WARMING TREND THROUGH THE WORK WEEK. THE COLD FRONT HAS PUSHED SOUTHEAST OF THE FORECAST AREA EARLY THIS AFTERNOON AND AS DRIER AIR FILTERS INTO THE REGION. SKIES WILL CLEAR THIS EVENING AS THE HIGH EXPANDS EAST INTO THE OHIO VALLEY WITH DEEP SUBSIDENCE. GENERALLY TRENDED CLOSER TO THE MORE VARIABLE AND COOLER METMOS GUIDANCE WHICH USUALLY CAPTURES THE RADIATIONAL COOLING IMPACTS BETTER.
1150 PM EDT SAT SEP 19 2015 HIGH PRESSURE WILL BUILD INTO THE AREA AND PROVIDE CLEAR SKIES AND LIGHT WINDS OF 5 KNOTS OR LESS THROUGHOUT THE FORECAST PERIOD. WITH VISIBILE SATELLITE IMAGERY CONTINUING TO SHOW A DECREASING TREND OF THE LOW CLOUDS (3-5 KFT).
LANDBREEZE MOVES OFFSHORE IN THE MORNING THEN SE FLOW REDEVELOPS BY LATE MORNING THROUGH EARLY AFTERNOON THOUGH STILL LIGHT AS RIDGING DOMINATES THE WEATHER. THE CLOSEST RAINS TO OUR AREA ARE MAINLY ACROSS PARTS OF NORTHERN AND CENTRAL TEXAS IN ASSOCIATION WITH A WEAK COLD FRONT. THE WEAK FRONT WILL NOT MAKE IT INTO MUCH OF SOUTHEAST TEXAS OVER THE NEXT COUPLE OF DAYS AS HIGH PRESSURE BEHIND THE BOUNDARY MOVES OFF TO THE EAST.
652 PM CDT SAT SEP 19 2015 THE WEAK COLD FRONT THAT MOVED THROUGH MOST OF NORTH TEXAS THIS MORNING HAD STALLED THIS AFTERNOON AND SHOULD REMAIN JUST SOUTH OF THE METROPLEX TAF SITES OVERNIGHT. MOST OF THE CONVECTION ASSOCIATED WITH THE FRONT DISSIPATED WITH THE DEPARTURE OF A SHORT WAVE TROUGH. /ISSUED 342 PM CDT SAT SEP 19 2015/ THE COLD FRONT HAS PUSHED THROUGH THE MAJORITY OF THE CWA AS OF 3 PM THIS AFTERNOON AND IS EXPECTED TO BECOME RELATIVELY STATIONARY TONIGHT. EXPECT HIGHS TOMORROW TO BE SIMILAR TO THE HIGH TEMPERATURES EXPERIENCED TODAY.
WINDS AND SEAS WILL CONTINUE TO SLOWLY SUBSIDE TONIGHT AS LOW PRESSURE CONTINUES TO MOVE FURTHER TO THE NORTHEAST.
AS A WEAK AREA OF LOW PRESSURE OFF THE ATLANTIC COAST IS HOLDING THE ATLANTIC RIDGE OFF TO THE SOUTHEAST. THE DRIER AND WARMER AIR ALOFT AND WEAK SURFACE FLOW SHOULD KEEP SHOWER AND THUNDERSTORM COVERAGE ISOLATED AT BEST.
THE COLD FRONT IS ROUGHLY LOCATED ALONG A LINE EXTENDING FROM HACKLEBURG. ISOLATED SHOWERS WHICH DEVELOPED ALONG THE COLD FRONT LATE THIS AFTERNOON/EARLY THIS EVENING HAVE DISSIPATED. ALTHOUGH FORECASTED MINIMUM TEMPERATURES ARE A FEW DEGREES WARMER THAN GUIDANCE VALUES. COLD FRONT CONTINUES TO SLOWLY PUSH SWD INTO THE REGION THIS EVENING. THAT IS DUE TO A FAIRLY STRONG UPPER RIDGE THAT EXTENDS ACROSS THE SERN US ALONG WITH LIMITED MOISTURE OVER THE TN VALLEY.
1021 PM EDT SAT SEP 19 2015 BEHIND A COLD FRONT DRIER AND COOLER AIR WILL ARRIVE FOR THE REMAINDER OF THE WEEKEND. A COLD FRONT HAS CROSSED MUCH OF OUR REGION THIS EVENING. WHICH WILL BE ABOUT 15 DEGREES COOLER THAN LAST NIGHT. HIGH PRESSURE WILL EXPAND ACROSS THE LOWER LAKES ON SUNDAY. TEMPERATURES WILL BE COOLER WITH HIGHS IN THE LOWER TO MID 60S. ELSEWHERE LOWS REMAIN IN THE LOW TO MID 40S.
THE MAIN MID/UPPER LEVEL MOISTURE PLUME TO THE EAST OF THIS TROUGH AXIS IS ENTIRELY SOUTH AND EAST OF OUR FORECAST AREA. AN AREA OF LOW PRESSURE LOCATED OFF THE CAROLINA COASTLINE IS SLOWLY PULLING AWAY TO THE NORTHEAST. WITH A WEAK TRAILING TROUGH AXIS BACK TO THE CENTRAL FL PENINSULA. THIS TROUGH AXIS. LOW PRESSURE WILL CONTINUE TO PULL AWAY FROM THE REGION OVER THE WESTERN ATLANTIC OVERNIGHT. HIGH PRESSURE BUILDING SOUTH OVER THE EASTERN HALF OF THE NATION DURING THE MIDWEEK PERIOD WILL CAUSE WINDS TO INCREASE OUT OF THE NORTHEAST.
Vapor imagery and upper air data showed very dry air aloft over our region, where the air was sinking in the subsidence zone west of a trough axis along the Southeast coast.