Aikyam-Lab/Synoptic-Bench huggingface dataset:
HIGH PRESSURE ALOFT WILL PROVIDE STABLE WEATHER PATTERN ACROSS S TEXAS LIMITING THE POTENTIAL FOR RAIN SHOWERS THROUGH THE PERIOD. BUT THIS IS MAINLY IN THE LOWER LEVELS AROUND 950 MB. LOW TEMPERATURES THROUGH THE MORNING REMAIN IN THE WARMER SIDE REACHING THE UPPER 70S TO NEAR 80S WITH NO CHANCE OF RAIN. AS THE LOW LEVEL MOISTURE REMAINS SOME CU WILL DEVELOP ACROSS THE AREA WITH HIGHER CLOUDS ALSO INCREASING FROM DEBRIS CLOUDS FROM CONVECTION TO THE NORTH. HIGH TEMPS WILL BE CARBON COPY OF YESTERDAY WITH A DEGREE WARMER.
1045 AM EDT FRI MAY 8 2015 MID/UPPER RIDGE HOLDS IN PLACE WITH WEAK STEERING FLOW.
AND INTO THE LOWER 80S AT THE BEACHES WHERE A SEABREEZE WILL DEVELOP.
ANOTHER MOSTLY SUNNY AND WARM DAY IS EXPECTED ACROSS THE REGION AS THE AREA IS BETWEEN A BUILDING RIDGE OVER THE MID SOUTH AND SUBTROPICAL STORM ANA OFF THE SOUTH CAROLINA COAST. THE AFTERNOON SEA BREEZE WILL KEEP IT A LITTLE COOLER ALONG THE COAST, GENERALLY IN THE MID 80S.
AN UPPER TROUGH WILL CONTINUE TO SLOWLY SINK SOUTH INTO SOUTHERN CALIFORNIA AS A RIDGE BUILDS INTO THE PACIFIC NORTHWEST.
918 AM EDT FRI MAY 8 2015 THE FORECAST AREA SITS IN BETWEEN HIGH PRESSURE OVER THE GULF AND SUBTROPICAL STORM ANA SPINNING AROUND OFFSHORE THE SOUTHEAST U. TEMPERATURES WILL AGAIN CLIMB INTO THE UPPER 80S OVER INLAND LOCATIONS WITH SLIGHTLY COOLER READINGS ALONG THE COAST DUE TO THE SEABREEZE.
THIS LOW PRESSURE OVER CENTRAL MO ALSO ASSOCIATED WITH A SHORT WAVE THAT EJECTS NE INTO CENTRAL IL BY EARLY EVENING. BOTH A FRONT SETTLING INTO THE REGION LATER TONIGHT AND A SERIES OF SMALL WAVES ROTATING AROUND THE TROF IN THE SW WILL SET UP A RATHER WET WEEKEND.
WATER VAPOR SATELLITE/WSR-88D VAD WIND PROFILES THIS MORNING DEPICT A MESOSCALE CONVECTIVE VORTEX /MCV/ OVER THE LOWER MISSISSIPPI VALLEY. TO THE LOWER 70S OVER PARTS OF THE DELTA REGION WHERE LIGHT SOUTHERLY WINDS WERE OCCURRING. THE COMPLEX SHOULD BE IN A WEAKENING STAGE AS IT MOVES INTO THE UPPER RIDGE THAT HAS PERSISTED ACROSS THE MIDSOUTH FOR SEVERAL DAYS BUT A 30 KT 850 MB LLJ MAY HELP SUSTAIN THE SYSTEM INTO THE MORNING HOURS. THE EXCEPTION WAS NE MS WHICH SHOULD STAY DRY AND WARM WITH THE UPPER RIDGE HANGING TOUGH THERE.
954 AM EDT FRI MAY 8 2015 AN UPPER LEVEL RIDGE WILL CONTINUE TO DOMINATE THE WEATHER ACROSS THE REGION TODAY.
UPPER LEVEL HIGH PRESSURE WILL REMAIN ALONG THE WEST COAST THROUGH TONIGHT. MEANWHILE AN UPPER LOW OVER SOUTHERN NEVADA WILL SHIFT TO THE FOUR CORNERS AREA TODAY AND TONIGHT.
LOW PRESSURE OFF TO THE EAST. AND LOW PRESSURE LEE OF THE ROCKIES INTO THE GREAT LAKES. EXPECTED TODAY THANKS TO THE RIDGE ELONGATED ACROSS THE EASTERN UNITED STATES AND BEING ON THE DRY SIDE OF AN AREA OF LOW PRESSURE ALONG THE CAROLINA COAST. CURRENT WATER VAPOR IMAGERY INDICATES A CLOSED LOW OFF THE SOUTH CAROLINA COAST. AN UPPER LEVEL RIDGE EXTEND ACROSS THE SOUTHEAST WITH A LONGWAVE TROUGH ACROSS THE WESTERN HALF OFF THE CONUS.
A SFC COLD FRONT EXTENDS FROM THE UPPER MS VALLEY DOWN TO THE TX PANHANDLE. THIS LEAVES US IN A WEDGE OF HIGH PRESSURE TODAY. THE ONGOING CONVECTION IN AR/MO/IL WILL BE DEFLECTED TO OUR NORTH BY THE UPPER LEVEL RIDGE. A SHORT WAVE WITH THIS CONVECTION WILL INTRUDE THE UPPER LEVEL RIDGE TODAY INCREASING OUR CLOUD COVER AS IT MOVES EAST.
1004 AM EDT FRI MAY 8 2015 HIGH PRESSURE WILL BUILD OFF THE COAST TODAY. A COLD FRONT WILL SLOWLY APPROACH FROM THE NORTH FRIDAY AND SATURDAY.
31 /ISSUED 445 AM EDT FRI MAY 8 2015/ THE UPPER RIDGE THAT HAS BEEN KEEPING US DRY AND THAT HAS BEEN HOLDING TS ANA TO OUR EAST WILL START TO BREAK DOWN AS THE MIDWEST TROUGH MOVES INTO THE MISSISSIPPI VALLEY AND PUTS THE CWA IN A SOUTHWEST FLOW.
1226 PM EDT FRI MAY 8 2015 AN UPPER LEVEL RIDGE WILL CONTINUE TO DOMINATE THE WEATHER ACROSS THE REGION TODAY.
PERSISTENCE REMAINS THE NAME OF THE GAME TODAY AS THE PATTERN REMAINS STAGNANT WITH A PINCHED HIGH PRESSURE RIDGE OVER THE APPALACHIANS.
CONVECTIVE TEMPS ARE ALSO IN THE LOW 40S. SURFACE RIDGING TO BUILD INTO THE FA TODAY ACCOMPANIED BY AN UNSEASONABLY COOL AIR MASS. WINDS/CLOUDS HAVE HELD TEMPERATURES UP OVERNIGHT BUT WITH SOME DEGREE OF CLOUD COVER TODAY AND COOL AIRMASS MAXIMUM TEMPERATURES LIKELY TO RUN A GOOD 10 DEGREES COOLER THAN NORMAL. UPPER LOW OVER THE 4 CORNERS AREAS WILL BEGIN TO LIFT NE ON SATURDAY.
LOW PRESSURE MOVING ACROSS SOUTHERN CA/NV WILL CONTINUE TO SPREAD MID LEVEL CLOUD-COVER NORTH INTO SW AND S-CENTRAL MT TODAY WITH A FEW SHOWERS POSSIBLE ALONG WITH LOCALIZED MVFR AND TERRAIN OBSCURATIONS ALONG AND SOUTH OF A LINE FROM KBZN TO KLWT. A SURFACE COLD FRONT AND UPPER LEVEL DISTURBANCE MOVING SOUTH FROM AB WILL MOVE SOUTH ALONG THE EAST SLOPES OF THE ROCKIES THIS MORNING.
A FEW RESIDUAL SHOWERS ARE POSSIBLE TODAY MAINLY FOR AREAS SOUTH OF THE MONTEREY BAY AS AN UPPER LEVEL LOW REMAINS OVER SOUTHERN CALIFORNIA. DRYING CONDITIONS ALONG WITH SLIGHTLY WARMER TEMPERATURES ARE EXPECTED THIS WEEKEND AS HIGH PRESSURE REBUILDS OVER THE WEST COAST. LOW CLOUDS CONTINUE OVER COASTAL AREAS OR JUST OFF OF THE COASTLINE THIS MORNING AS THE MAIN MID/UPPER LEVEL LOW HAS SHIFTED OVER SOUTHEASTERN CALIFORNIA. THE UPPER LOW PRESSURE SYSTEM THAT BROUGHT SHOWERS TO PORTIONS OF OUR DISTRICT YESTERDAY IS CURRENTLY LOCATED OVER SOUTHERN CALIFORNIA. ANOTHER AREA OF PRECIPITATION IS CURRENTLY MOVING AROUND THE TOP SIDE OF THE LOW CENTER AND INTO THE SAN JOAQUIN VALLEY. EXPECT SHOWER ACTIVITY TO DIMINISH TODAY AS THE UPPER LOW CENTER CONTINUES TO MOVE SOUTH AND EAST TOWARDS WESTERN ARIZONA.
1014 AM EDT FRI OCT 2 2015 HIGH PRESSURE TO OUR NORTH WILL COMBINE WITH A DEEP UPPER LOW OVER THE SOUTHEASTERN STATES TO SET UP A DEEP-MOIST SOUTHEASTERLY FLOW AND PERIODS OF RAIN.
1025 AM CDT FRI OCT 2 2015 14Z PRESSURE ANALYSIS SHOWING A VERY STRONG PRESSURE GRADIENT ACROSS THE LOWER MISS VALLEY ATTM.
655 AM CDT FRI OCT 2 2015 FOR 12Z TAFS /ISSUED 433 AM CDT FRI OCT 2 2015/ A MODERATE AMPLIFIED PATTERN EXISTS ACROSS THE CONUS EARLY THIS MORNING WITH A TROUGH CENTERED DIRECTLY OVER NORTH/CENTRAL AL. THE TROUGHS CHARACTERIZING THE UPPER PATTERN ARE OF THE CLOSED VARIETY AND DO NOT REPRESENT SIGNIFICANT AMPLIFICATION OF THE POLAR WESTERLIES.
LOW DEWPOINTS ALONG WITH NORTH WIND AROUND 10 MPH IS MAKING IT FEEL A BIT COOLER. MOSTLY IN THE LOW 70S. HERE IN THE MIDSOUTH A FINGER RIDGE WILL DOMINATE OUR WEATHER KEEPING US MOSTLY DRY AND MILD. TEMPERATURES WILL TREND SLIGHTLY WARMER TROUGH THE WORK WEEK AS THE RIDGE EXPANDS AND FLATTENS OUT. BUT EXPECT RAIN CHANCES TO INCREASE IN THE NEXT FORECAST UPDATES AS GUIDANCE GETS A BETTER HANDEL ON THE LOW. 30/SIRMON 12Z TAF CYCLE THE CLOUD EDGE ASSOCIATED WITH AN UPPER LEVEL LOW WAS RETREATING WEST THIS MORNING CONTAINING CIGS NEAR 2200 FT AS OBSERVED AT MKL AND TUP.
TROUGHING IN PLACE AND AMPLE LOWER LEVEL MOISTURE. TROUGHING WILL EXTEND NORTHWEST/WEST FROM THIS SYSTEM OVER THE REGION. THE TROUGHING WILL RESULT IN A TIGHTER PRESSURE GRADIENT AND ELEVATED WINDS.
THESE CLOUDS ARE ASSOCIATED WITH AN APPROACHING UPPER LOW. THE LOW WILL BE MOVING OVER THE FORECAST AREA TONIGHT INTO SATURDAY WITH MOSTLY CLOUDY SKIES. NOT EXPECTING MUCH PRECIPITATION WITH THE LOW OTHER THAN SCATTERED SHOWERS OVER THE MOUNTAINS. A WEAK TRANSITORY UPPER RIDGE WILL BE OVER THE PACIFIC NORTHWEST TODAY. AN UPPER LOW DEVELOPING OVER NORTHWEST BRITISH COLUMBIA THIS MORNING WILL DROP SOUTH ACROSS THE REGION LATE TONIGHT AND SATURDAY.
THE BROAD PACIFIC LOW IS CENTERED NEAR THE UT/NV BORDER THIS MORNING WHILE THE ASSOCIATED COLD FRONT NOSES INTO THE WASATCH FRONT. BUT AS THE TROUGH CONTINUES EAST SHOWERS AND THUNDERSTORMS SHOULD FILL BACK IN OVER NORTHERN AND CENTRAL UTAH LATE THIS MORNING THROUGH THE AFTERNOON. PRECIP WILL TEND TO TAPER OFF THIS EVENING AND TONIGHT AS THE TROUGH EXITS THE AREA.
459 AM MST FRI OCT 2 2015 A COUPLE OF LOW PRESSURE SYSTEMS WILL AFFECT THE WESTERN STATES THE NEXT FEW DAYS. THE FIRST WILL BE DRY AND LEAD TO LOCALLY BREEZY CONDITIONS AND COOLER TEMPERATURES TODAY THROUGH SATURDAY.
/ISSUED 329 AM CDT FRI OCT 2 2015/ (Today and tonight) Weak backdoor cold front moved into the Big Country last night bringing slightly cooler air and northeast winds to the area. expect slightly cooler afternoon highs for the northern half of the area. Will see highs in the lower 80s north. With cooler and drier airmass in place. It develops a strong upper low, digging it south along the West Coast and into the Desert Southwest, before progressively ejecting it northeast while dampening the system out.
1023 AM EDT FRI OCT 2 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM DRIFTING SLOWLY EAST ACROSS THE SOUTHEASTERN UNITED STATES WILL INTERACT WITH MOISTURE FROM HURRICANE JOAQUIN. ELONGATED UPPER LEVEL LOW CENTERED OVER THE GULF STATES EXTENDS NORTH INTO THE OHIO VALLEY. THE UPPER LOW WILL INTERACT WITH THE MOISTURE FROM JOAQUIN. BUMPED HIGHS UP A COUPLE OF DEGREES FOR TODAY DUE TO THE DRYING OUT OF THE FORECAST, HIGHS SHOULD RANGE FROM THE LOWER 60S IN THE NW TO THE UPPER 50S IN THE SE.
958 AM EDT FRI OCT 2 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER ONTARIO AND QUEBEC WILL CONTINUE TO PROVIDE SEASONABLY COOL TEMPERATURES AND A DRY NORTHERLY FLOW TO THE NORTH COUNTRY FOR TODAY AND THROUGH THE UPCOMING WEEKEND. VERY QUIET WEATHER PATTERN FOR THE NORTH COUNTRY WITH 1042MB HIGH PRESSURE SYSTEM OVER NORTHERN ONTARIO SERVING AS OUR CONTROLLING SYNOPTIC FEATURE. A BIT OF A CHILLY START THIS MORNING WITH SOME BELOW FREEZING READINGS IN THE NORTHERN ADIRONDACKS. EXCEPT IN THE LOWER 50S IN THE 1-2 KFT ELEVATIONAL BAND. CONTINUED DRY AND QUIET WITH SEASONABLY COOL/STABLE HIGH PRESSURE ANCHORED ACROSS WRN QUEBEC.
716 AM EDT FRI OCT 2 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER ONTARIO AND QUEBEC WILL CONTINUE TO PROVIDE SEASONABLY COOL TEMPERATURES AND A DRY NORTHERLY FLOW TO THE NORTH COUNTRY FOR TODAY AND THROUGH THE UPCOMING WEEKEND. VERY QUIET WEATHER PATTERN FOR THE NORTH COUNTRY WITH 1042MB HIGH PRESSURE SYSTEM OVER NORTHERN ONTARIO SERVING AS OUR CONTROLLING SYNOPTIC FEATURE. A BIT OF A CHILLY START THIS MORNING WITH SOME BELOW FREEZING READINGS IN THE NORTHERN ADIRONDACKS. EXCEPT IN THE LOWER 50S IN THE 1-2 KFT ELEVATIONAL BAND. CONTINUED DRY AND QUIET WITH SEASONABLY COOL/STABLE HIGH PRESSURE ANCHORED ACROSS WRN QUEBEC.
UPPER LOW REMAINS CENTERED OVER THE TENNESSEE VALLEY WITH PLENTY OF MOISTURE BEING PULLED INTO MIDDLE TENNESSEE AS A RESULT.
950 AM EDT FRI OCT 2 2015 OVERALL FORECAST PATTERN LOOKS ON TRACK WITH THE STRONG UPPER LEVEL TROUGH DIGGING SOUTH INTO THE NORTHEASTERN GULF OF MEXICO APPARENT ON WATER VAPOR SATELLITE IMAGERY. THE TROUGH IS ALSO HELPING TO DEVELOP A SURFACE AREA OF LOW PRESSURE NORTHEAST OF FLORIDA. THE BIGGEST IMMEDIATE IMPACT THIS LOW WILL HAVE ON THE SHORT TERM FORECAST WILL BE TO INCREASE WINDS ACROSS THE FORECAST AREA BEGINNING TODAY AND CONTINUING THROUGH THE WEEKEND.
728 AM EDT FRI OCT 2 2015 A MASSIVE AREA OF HIGH PRESSURE STAY ANCHORED OVER CROSS SOUTHEASTERN CANADA OVER THE NEXT SEVERAL DAYS. WITH A DEVELOPING UPPER LOW OVER THE SOUTHEASTERN STATES.
HIGH PRESSURE AT THE SURFACE MOVING INTO THE REGION WILL KEEP SKIES CLEAR. /ISSUED 520 AM CDT FRI OCT 2 2015/ ANOTHER DRY AND SUNNY DAY CAN BE EXPECTED ACROSS THE REGION TODAY AS NORTHEASTERLY WINDS CONTINUE TO BRING IN DRIER AND COOLER AIR. OVERNIGHT LOWS SHOULD FALL IN THE LOW TO MID 50S ACROSS MOST OF THE REGION. AS MOSTLY SUNNY AND DRY CONDITIONS WILL PERSIST AS AN UPPER RIDGE CONTINUES TO BUILD IN ACROSS THE SOUTHERN PLAINS.
726 AM EDT FRI OCT 2 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER ONTARIO AND QUEBEC WILL CONTINUE TO PROVIDE SEASONABLY COOL TEMPERATURES AND A DRY NORTHERLY FLOW TO THE NORTH COUNTRY FOR TODAY AND THROUGH THE UPCOMING WEEKEND. VERY QUIET WEATHER PATTERN FOR THE NORTH COUNTRY WITH 1042MB HIGH PRESSURE SYSTEM OVER NORTHERN ONTARIO SERVING AS OUR CONTROLLING SYNOPTIC FEATURE. A BIT OF A CHILLY START THIS MORNING WITH SOME BELOW FREEZING READINGS IN THE NORTHERN ADIRONDACKS. EXCEPT IN THE LOWER 50S IN THE 1-2 KFT ELEVATIONAL BAND. CONTINUED DRY AND QUIET WITH SEASONABLY COOL/STABLE HIGH PRESSURE ANCHORED ACROSS WRN QUEBEC.
1112 AM CDT FRI OCT 2 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM CONTINUES TO BRING WIDESPREAD CLOUD COVER TO THE MIDSOUTH THIS MORNING. LOW DEWPOINTS ALONG WITH NORTH WIND AROUND 10 MPH IS MAKING IT FEEL A BIT COOLER. MOSTLY IN THE LOW 70S. HERE IN THE MIDSOUTH A FINGER RIDGE WILL DOMINATE OUR WEATHER KEEPING US MOSTLY DRY AND MILD. TEMPERATURES WILL TREND SLIGHTLY WARMER TROUGH THE WORK WEEK AS THE RIDGE EXPANDS AND FLATTENS OUT. BUT EXPECT RAIN CHANCES TO INCREASE IN THE NEXT FORECAST UPDATES AS GUIDANCE GETS A BETTER HANDEL ON THE LOW. 30/SIRMON 12Z TAF CYCLE THE CLOUD EDGE ASSOCIATED WITH AN UPPER LEVEL LOW WAS RETREATING WEST THIS MORNING CONTAINING CIGS NEAR 2200 FT AS OBSERVED AT MKL AND TUP.
The upper low over the Tn valley will continue its dive southward with time. The surface gradient will respond by tightening between high pressure over Eastern Canada and low pressure over the southeast U. This will keep a fetch of nice cool n-nelys across the lower Ohio river valley.
AN UPPER LEVEL LOW WILL MOVE ACROSS WESTERN WASHINGTON THIS AFTERNOON THROUGH TONIGHT FOR MOSTLY CLOUDY SKIES AND SCATTERED SHOWERS. SKIES WILL CLEAR FROM THE NORTH BY AROUND MID-DAY SATURDAY AS THE LOW DEPARTS TO THE SOUTH.
HIGHS IN THE LOW TO MID 80S AND MOSTLY SUNNY SKIES WILL MAKE TODAY A GREAT ONE TO GET OUTSIDE. 45 SEVERAL DAYS OF PLEASANT WX ON TAP WITH RIDGING. H5 RIDGE SHOULD BEGIN FLATTENING TOWARD MIDWEEK AS A WESTERN TROF BEGINS EDGING CLOSER TO TX. RAIN CHANCES INCREASE DURING THE SECOND HALF OF THE WEEK DUE TO THE COMBINATION OF THE MOISTURE RETURN AND APPROACH OF THE TROF. WINDS SHOULD DECREASE BY SAT AS THE UPPER RIDGE BEGINS TO BUILD OVER THE REGION.
838 AM MST FRI OCT 2 2015 A COUPLE OF LOW PRESSURE SYSTEMS WILL AFFECT THE WESTERN STATES THE NEXT FEW DAYS. THE FIRST WILL BE DRY AND LEAD TO LOCALLY BREEZY CONDITIONS AND COOLER TEMPERATURES TODAY THROUGH SATURDAY.
AN UPPER LEVEL TROUGH IS ACROSS THE SOUTHEAST WITH THE ASSOCIATED LOW OVER ALABAMA. THERE IS NOT ENOUGH CAPE TO SUPPORT WIDESPREAD THUNDERSTORMS ESPECIALLY WITH THE LOWER LEVELS A LITTLE CAPPED. HEAVY RAINFALL IS POSSIBLE WITH THE SHOWERS/THUNDERSTORMS TODAY AS SOUNDINGS IN THE LOW LEVELS ARE ALSO SATURATED WITH PWATS ~1. TEMPS WILL BE COOL IN THE LOW TO MID 60S. AN UPPER LOW PRESSURE SYSTEM.
1248 PM EDT FRI OCT 2 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER ONTARIO AND QUEBEC WILL CONTINUE TO PROVIDE SEASONABLY COOL TEMPERATURES AND A DRY NORTHERLY FLOW TO THE NORTH COUNTRY FOR TODAY AND THROUGH THE UPCOMING WEEKEND. CONTINUED DRY AND QUIET WITH SEASONABLY COOL/STABLE HIGH PRESSURE ANCHORED ACROSS WRN QUEBEC.
618 AM CDT FRI OCT 2 2015 12Z TAF CYCLE AN UPPER RIDGE WILL BUILD IN OVER THE PANHANDLES TODAY WITH EMBEDDED UPPER LEVEL DISTURBANCES TRACK EAST AND SOUTH OUT OF THE CENTRAL AND SOUTHERN ROCKIES. COOLER TEMPERATURES ARE ALSO ANTICIPATED TODAY DUE TO EXTENSIVE CLOUD COVER AND UPSLOPE LOW LEVEL SE WINDS. THE THREAT FOR MORE SHOWERS AND TSTMS INCREASES AS AN UPPER LEVEL LOW PRESSURE SYSTEM ZIPS NNEWD OUT OF THE INTERMOUNTAIN REGION TOWARDS ERN MT AND WRN ND.
946 AM PDT FRI OCT 2 2015 Dry weather and warmer temperatures are expected today.
407 AM PDT FRI OCT 2 2015 Dry weather and warmer temperatures are expected today.
1028 AM EDT FRI OCT 2 2015 HIGH PRESSURE FROM NORTHERN CANADA WILL SLOWLY BUILD ACROSS THE REGION THROUGH THE WEEKEND. ORGNL DISC: A VERY LARGE AREA OF HIGH PRESSURE PUSHING INTO WESTERN QUEBEC WILL BRING CHILLY AND DRY WEATHER TO THE AREA TODAY AND TONIGHT. AN UPPER LEVEL TROUGH JUST NORTH OF OUR AREA ASSOCIATED WITH CHILLY AIR POOLED ALOFT WILL LIKELY PRODUCE LOTS OF STRATOCUMULUS CLOUDS ACROSS THE AREA, ESPECIALLY OVER NORTHERN AND EASTERN SPOTS TODAY. LOWS WILL AGAIN BE NEAR FREEZING OVER THE NORTH AND CLOSE TO 40 DOWNEAST. THE GRADIENT SOUTH OF THE HIGH WILL RESULT IN A BRISK NORTHEAST WIND TODAY AND TONIGHT, ESPECIALLY ALONG THE COAST. HIGH PRESSURE WILL BUILD ACROSS THE REGION SATURDAY THROUGH THE WEEKEND. CLOUD COVER SHOULD THEN DECREASE SATURDAY AFTERNOON WITH BUILDING HIGH PRESSURE.
SURFACE RIDGING MAINTAINS NELY WINDS OF 6 KTS OR LESS MOST AREAS. UPPER AIR ANALYSIS LAST EVENING SHOWED A TROUGH OVER THE EASTERN UNITED STATES AND A RIDGE FROM SOUTHERN NEW MEXICO TO MONTANA. A RIDGE EXTENDED DOWN THROUGH OKLAHOMA TO SOUTH TEXAS. DURING THIS PERIOD THE UPPER RIDGE WILL BUILD TO THE EAST OVER TEXAS. TEMPERATURES TODAY WILL BE AROUND FIVE DEGREES COOLER THAN YESTERDAY AND LOW TEMPERATURES SATURDAY WILL BE FIVE TO 10 DEGREES COOLER THAN FRIDAY.
/ISSUED 618 AM CDT FRI OCT 2 2015/ 12Z TAF CYCLE AN UPPER RIDGE WILL BUILD IN OVER THE PANHANDLES TODAY WITH EMBEDDED UPPER LEVEL DISTURBANCES TRACK EAST AND SOUTH OUT OF THE CENTRAL AND SOUTHERN ROCKIES. COOLER TEMPERATURES ARE ALSO ANTICIPATED TODAY DUE TO EXTENSIVE CLOUD COVER AND UPSLOPE LOW LEVEL SE WINDS. THE THREAT FOR MORE SHOWERS AND TSTMS INCREASES AS AN UPPER LEVEL LOW PRESSURE SYSTEM ZIPS NNEWD OUT OF THE INTERMOUNTAIN REGION TOWARDS ERN MT AND WRN ND.
CHATTANOOGA AIRPORT, TN 63 58 65 56 / 70 60 70 50 KNOXVILLE MCGHEE TYSON AIRPORT, TN 63 55 64 56 / 90 70 80 70 OAK RIDGE, TN 63 54 62 56 / 90 70 90 60 TRI CITIES AIRPORT, TN 63 53 64 56 / 90 90 90 70 NC.
CURRENT WATER VAPOR IMAGERY INDICATES AN OBVIOUS SPIN FROM THE UPPER LEVEL LOW CURRENTLY LOCATED ACROSS WEST-CENTRAL ALABAMA. THE MOISTURE IS LIMITED TO THE LOWEST 300-400 MB AND ANY LOW LEVEL LIFT WILL LEAD TO SHOWERS ACROSS THE AREA. NOT EXPECTING MUCH IN THE WAY OF ANY THUNDERSTORMS BUT WITH THE LOW INSTABILITY WENT AHEAD AND MENTIONED A SMALL CHANCE FOR EMBEDDED THUNDER THROUGHOUT THE DAY. 6 INCHES WITH THE MOISTURE LIMITED TO THE LOW LEVELS. LARGE UPPER LOW WILL SLOWLY MIGRATE EAST AND NORTHEAST THIS PERIOD.
1254 PM EDT FRI OCT 2 2015 HIGH PRESSURE FROM NORTHERN CANADA WILL SLOWLY BUILD ACROSS THE REGION THROUGH THE WEEKEND. ORGNL DISC: A VERY LARGE AREA OF HIGH PRESSURE PUSHING INTO WESTERN QUEBEC WILL BRING CHILLY AND DRY WEATHER TO THE AREA TODAY AND TONIGHT. AN UPPER LEVEL TROUGH JUST NORTH OF OUR AREA ASSOCIATED WITH CHILLY AIR POOLED ALOFT WILL LIKELY PRODUCE LOTS OF STRATOCUMULUS CLOUDS ACROSS THE AREA, ESPECIALLY OVER NORTHERN AND EASTERN SPOTS TODAY. LOWS WILL AGAIN BE NEAR FREEZING OVER THE NORTH AND CLOSE TO 40 DOWNEAST. THE GRADIENT SOUTH OF THE HIGH WILL RESULT IN A BRISK NORTHEAST WIND TODAY AND TONIGHT, ESPECIALLY ALONG THE COAST. HIGH PRESSURE WILL BUILD ACROSS THE REGION SATURDAY THROUGH THE WEEKEND. CLOUD COVER SHOULD THEN DECREASE SATURDAY AFTERNOON WITH BUILDING HIGH PRESSURE.
The 12 UTC surface analysis showed a non-tropical area of low pressure developing off the NE Florida coast along a frontal zone stretching up the Eastern Seaboard. Cooler and somewhat drier air was advancing southward across the Southeast. Lingering low level moisture in the lowest 3kft has left an extensive stratus deck across the region. At upper levels, an upper low is cutting off across the Southeast with the 12z center just west of Birmingham. Pieces of energy rotating around this upper low will continue to lead to periods of showers across the region today and into the weekend. Temperatures will be quite cool, thanks to the extensive cloudiness, with highs in the upper 60s across the far northern areas to the low to mid 70s elsewhere.
CURRENT RADAR IMAGERY SHOWS LIGHT RAIN SHOWERS SLOWLY CREEPING OVER THE RIDGES OF MD/PA/WV. ANALYSIS OF THE 12Z SOUNDING REVEALS A FAIRLY DRY BOUNDARY LAYER THAT IS RESIDENT OVER THE LOWLAND COUNTIES. WITH LOCATIONS IN EASTERN OHIO REACHING MAYBE INTO THE LOW 60S WHILE LOCATIONS IN GARRETT AND TUCKER COUNTIES MAY NOT ESCAPE THE 40S.
633 AM CDT FRI OCT 2 2015 THE CENTER OF AN AREA OF HIGH PRESSURE WILL CONTINUE TO HOVER NEAR JAMES BAY AND WESTERN QUEBEC THROUGH SATURDAY. THE HIGH PRESSURE WILL KEEP PROVIDING THE NORTHLAND WITH COOL EASTERLY FLOW. THE HIGH PRESSURE WILL PROMOTE CLEAR SKIES AND LIGHT WINDS AT NIGHT. SATURDAY LOOKS JUST A TAD COOLER. THE FLOW FROM LAKE SUPERIOR WILL KEEP AREAS CLOSER TO THE LAKE WARMER IN THE UPPER 30S TO LOW 40S.
1101 AM CDT FRI OCT 2 2015 High pressure the dominant feature for the Midwest, with some mid and low level moisture moving in from the east. A blocky upper level flow pattern persists across North America, keeping area in a tight surface pressure gradient between high pressure centered over eastern Canada and the low pressure associated with Hurricane Joaquin. Strong upper level trof digging southward into the TN river valley and and central/eastern Gulf coast states with a 569 dm 500 mb low over AL. This deep trof to steer hurricane on northward journey and likely keep it off shore.
06Z GFS AND OTHER SHORT RANGE MODELS CONTINUE TO INDICATE THE PRESENCE OF AN ELONGATED LOW PRESSURE AREA OFFSHORE FROM E CENTRAL FL NEAR 999 MBS WHICH IS KEEPING WINDS BACKED TO THE NORTH NEAR THE COAST.
521 PM EDT TUE APR 21 2015 A COLD FRONT WILL MOVE THROUGH TONIGHT INTO WEDNESDAY MORNING BRINGING SHOWERS TO THE AREA.
HIGH PRESSURE ALOFT OVER THE GREAT BASIN WILL SLOWLY SHIFT EAST OF THE STATE BY LATE WEDNESDAY. A WEAKENING LOW PRESSURE SYSTEM OVER SOUTHERN CALIFORNIA WILL TURN NORTH AND SEND MOISTURE NORTH ACROSS UTAH.
LARGE UPPER TROUGH WILL CONTINUE TO DOMINATE THE FORECAST PERIOD. AN APPROACHING WAVE AND COLD FRONT WILL RETURN THE CHANCE FOR SHOWERS BY LATE TONIGHT/EARLY WEDNESDAY.
112 PM MDT TUE APR 21 2015 NORTHWEST FLOW CONTINUES ACROSS THE CENTRAL PLAINS THROUGH TONIGHT AHEAD OF A RIDGE BUILDING INTO THE ROCKIES.
501 PM EDT TUE APR 21 2015 A FRONT WILL PUSH EAST INTO THE MARITIMES TONIGHT AS A WEAK RIDGE OF HIGH PRESSURE BUILDS IN FROM THE WEST. A SECONDARY COLD FRONT WILL APPROACH FROM THE WEST ON WEDNESDAY AND WILL SLOWLY CROSS THE REGION WEDNESDAY NIGHT.
WINDS WILL BEGIN TO DIMINISH THIS EVENING AS A COLD FRONT SWEEPS ACROSS THE AREA. NORTH ATLANTIC BLOCKING WILL KEEP TROUGHING/NW FLOW PATTERN IN PLACE THROUGH THE EXTENDED RESULTING IN A CONTINUATION OF BELOW NORMAL TEMPS AND SEVERAL OPPORTUNITIES FOR EARLY MORNING FROST FORMATION.
A COLD FRONT HAS ALSO BECOME NEARLY STATIONARY OVER THE LAKE OKEECHOBEE REGION THIS AFTERNOON.
241 PM EDT TUE APR 21 2015 A COLD FRONT WILL SWEEP ACROSS THE AREA WEDNESDAY.
503 PM CDT TUE APR 21 2015 A PASSING SERIES OF WEAK MID LEVEL DISTURBANCES MOVING THROUGH THE WEST NORTHWEST FLOW AROUND THE EASTERN SIDE OF A RIDGE OF HIGH PRESSURE TO THE WEST AND AROUND THE BROAD UPPER LEVEL TROUGH OF LOW PRESSURE OVER THE EASTERN STATES WAS PROVIDING LIFT TO GO ALONG WITH THE MOISTURE AROUND 8-15 KFT AND PRODUCING SHOWERS AND ISOLATED THUNDERSTORMS THIS AFTERNOON. EARLIER IN THE DAY DUE TO THE LOW WET BULB ZERO SEVERAL REPORTS OF PEA SIZE HAIL WERE REPORTED. THEN DURING THE AFTERNOON A COLD FRONT WILL BACKDOOR INTO THE AREA WITH SHOWERS AND THUNDERSTORMS INCREASING.
A ridge of high pressure will continue over the Northern Rockies through tonight. A cold front will be swinging through the area on Wednesday.
ANOTHER LOW PRESSURE SYSTEM MOVING SOUTH ALONG THE COAST WILL MAINTAIN THE THREAT OF SHOWERS AND THUNDERSTORMS FOR MUCH OF CENTRAL CALIFORNIA THROUGH THE END OF THE WEEK. A WEAK UPPER LEVEL LOW PRESSURE AREA CURRENTLY SPINNING NEAR THE SOUTHERN CALIFORNIA COAST IS ROTATING MOISTURE ACROSS CENTRAL CALIFORNIA IN A MODERATE EAST TO SOUTHEAST FLOW. THERE IS HOWEVER A SOMEWHAT DRIER NORTHWESTERLY FLOW SHOWN ACROSS THE VALLEY BY TOMORROW AFTERNOON AS THE TROUGH MOVES IN.
344 PM CDT TUE APR 21 2015 BROAD UPPER LEVEL LOW CENTERED OVER THE GREAT LAKES REGION WILL WOBBLE EASTWARD OVERNIGHT. WITH WARMING THERMAL PROFILES HIGHS WILL BE A FEW DEGREES WARMER. IN THE LOWER 50S EAST TO UPPER 50S WEST. STAYED ON THE LOW SIDE OF GUIDANCE WITH RESPECT TO DEWPOINTS.
WITH A QUIET BUT COOL OVERNIGHT EXPECTED AS A RESULT WITH LOWS IN THE LOWER 20S.
153 PM EDT TUE APR 21 2015 A STRONG LOW PRESSURE SYSTEM OVER THE GREAT LAKES WILL BRING VERY WINDY CONDITIONS TODAY ALONG WITH A CHANCE OF SHOWERS AT TIMES TONIGHT INTO WEDNESDAY MORNING.
1131 AM MDT TUE APR 21 2015 UPDATED AVIATION SECTION THE PATTERN OVER THE WEST FEATURES A RIDGE OVER THE PACIFIC NORTHWEST ABOVE A CLOSED LOW OFF THE COAST OF SOUTHERN CALIFORNIA.
A LINE OF SCATTERED TO NUMEROUS RAIN SHOWERS ARE EXPECTED TO FIRE ALONG AN APPROACHING AND RATHER POTENT COLD FRONT.