Aikyam-Lab/Synoptic-Bench huggingface dataset:
536 AM EDT SAT MAR 19 2016 LOW PRESSURE IS EXPECTED TO BRING RAIN AND SNOW THIS WEEKEND WITH BELOW AVERAGE TEMPERATURES. WITH AN INVERTED SFC TROF EXTENDING N INTO WRN PA. EXPECTING SNOW IN THE HIGHER TERRAIN OF WV AND MD. SFC TEMPS SHOULD WARM ENOUGH OUTSIDE OF THE RIDGES TO PRECLUDE SNOW ACCUMULATION. WITH 2-4 INCHES PSBL IN THE WV/MD RIDGES WHERE COLDER TEMPS ARE PROGGED TO REMAIN. ISSUED A WINTER WEATHER ADVISORY FOR THE HIGHER TERRAIN IN COORDINATION WITH SURROUNDING WFO/S. THE UPR LOW IS PROGGGED TO OPEN INTO A TROF SUN AS COASTAL LOW DEVELOPMENT OCCURS OFF THE CAROLINAS. THE UPR TROF IS PROGGED TO CROSS THE UPR OH VLY RGN LATE SUN AND SUN NGT. A CROSSING WARM FRONT IN ZONAL FLOW SHOULD BRING WARMER TEMPS TUE.
A WEAK COLD FRONT WAS MOVING INTO FAR NORTHERN INDIANA THIS AFTERNOON. SOME LIGHT SNOW OVER LOWER MICHIGAN HAD ENDED AS THE LOWER LAYERS HAD MIXED OUT. THE LOW LEVEL FLOW WILL BECOME EAST TONIGHT AS A WEAK SYSTEM MOVES SOUTH OF THE AREA. MODELS ARE NOW TRENDING CLOSED LOW FURTHER SOUTH THAN PREVIOUS RUNS AND WILL TAKE BETTER MID LEVEL FORCING WITH IT AS 100M HEIGHT FALLS AND -30C COLD POOL NOW TRACKING DOWN INTO TN VALLEY.
BUILDING UPPER RIDGE WILL BRING WARMER TEMPERATURES AND BREEZY CONDITIONS FOR THE WEEKEND. PASSING HIGH CLOUDS TODAY AS MOISTURE STREAMS THROUGH THE RIDGE. CLOUDS INCREASE FURTHER ON SUNDAY AS AN UPPER TROUGH MOVES INTO THE PACIFIC NORTHWEST. CLOUD COVER AND SHOWERS WILL COOL TEMPERATURES ACROSS SOUTHEAST OREGON SUNDAY WHILE A WARMER AIRMASS AND LESS CLOUD COVER WILL WARM TEMPERATURES FROM TODAY ACROSS SOUTHWEST IDAHO. WINDS ARE GUSTY BOTH DAYS AS THE SURFACE PRESSURE GRADIENT TIGHTENS AND WINDS ALOFT INCREASE AHEAD OF THE UPPER TROUGH.
BUT EASTERLY SURFACE WINDS SOUTH OF THE HIGH TEND NOT TO BE THE MOST EFFICIENT FOR STRONG RADIATIONAL COOLING IN OUR CWA.
A FAIRLY WEAK BUT EXPANSIVE UPPER LEVEL LOW PRESSURE SYSTEM WILL DRIFT SLOWLY SOUTHWARD FROM MINNESOTA OVER IOWA TONIGHT. BUT NOT IN THE NORTH AND AS THE EVENING PROGRESSES THE CLOUDS WILL FILL BACK IN ANYWAY AS THE UPPER LOW APPROACHES. TOMORROW AND TOMORROW NIGHT: FORECAST CONFIDENCE - MEDIUM UPPER LEVEL CLOSED LOW WILL PIVOT SWD THROUGH THE STATE TOMORROW.
UPSTREAM RIDGE WILL KEEP FAIR WEATHER IN THE FORECAST THROUGH MOST OF THE WEEKEND. THE RIDGE WILL SHIFT EAST OF IDAHO DURING THE DAY SUNDAY.
226 AM EDT SAT MAR 19 2016 LOW PRESSURE IS EXPECTED TO BRING RAIN AND SNOW THIS WEEKEND WITH BELOW AVERAGE TEMPERATURES. WITH AN INVERTED SFC TROF EXTENDING N INTO WRN PA. CLOUDS WL INCREASE OVRNGT AHD OF THIS LOW. EXPECTING SNOW IN THE HIGHER TERRAIN OF WV AND MD. BOUNDARY LYR TEMPS SHOULD WARM ENOUGH OUTSIDE OF THE RIDGES TO PRECLUDE SNOW ACCUMULATION. WITH ARND A COUPLE OF INCHES PSBL IN THE WV/MD RIDGES. AN INVERTED TROUGH WILL STILL BE PRESENT AS A TRIGGER FOR ADDITIONAL PRECIPITATION SATURDAY NIGHT INTO SUNDAY. AND OVERNIGHT IS WHEN THE BULK OF SNOWFALL ACCUMULATION SHOULD OCCUR OVER THE REGION OUTSIDE OF THE HIGHEST ELEVATIONS. WITH THE TROUGH MOVING EAST ON SUNDAY. HAVE BUMPED UP SNOW TOTALS IN THE RIDGES DURING THIS TIME PERIOD.
UPPER TROF AND ASSOC JET WILL CONTINUE TO SHIFT EASTWARD THIS EVENING WITH SNOW QUICKLY WINDING DOWN AS CONDITIONAL SYMMETRIC INSTABILITY DECREASES IN RESPONSE. RESIDUAL SNOW SHOWERS SHOULD STAY CONFINED TO THE LOWER EASTERN SLOPES OF THE SOUTHEAST MOUNTAINS THIS EVENING WHERE SHALLOW EASTERLY UPSLOPE FLOW CONTINUES. HAVE ALSO RECEIVED REPORTS OF SOME FREEZING DRIZZLE DOWN AROUND RATON PASS FROM SPOTTERS AND WEB CAMS. STRATUS SHOULD REMAIN FAIRLY PERSISTENT OVERNIGHT ALONG THE LOWER EASTERN SLOPES OF THE SOUTHEAST MOUNTAINS. SOME OF THE MODELS INDICATE SOME ISOLATED SHOWERS MAY REDEVELOP ALONG THE LOWER EASTERN SLOPES OF THE SOUTHEAST MOUNTAINS SATURDAY AFTERNOON. AS UPPER LEVEL RIDGING BUILDS ACROSS THE STATE. SHOULD SEE HIGHS WARMING BACK TO SEASONAL AVERAGES IN THE MID TO UPPER 50S ACROSS THE EASTERN PLAINS AND MAINLY 30S TO LOWER 50S ACROSS THE HIGHER TERRAIN.
The main upper low should stay over the upper Midwest, but there should be enough wide scale lift through the column to produce enough rainfall originating in the mid levels to overcome dry air at the surface in the western half of the region. The sunshine should be short-lived however, as the aforementioned upper low will begin to pivot southward across our area Saturday night. After midnight Saturday night, models show the presence of the low will cause column thicknesses to crash, and with surface temperatures dipping into the 30s, generation of very light snow or rain/snow mix will be possible.
301 AM EDT SAT MAR 19 2016 LOW PRESSURE IS EXPECTED TO BRING RAIN AND SNOW THIS WEEKEND WITH BELOW AVERAGE TEMPERATURES. WITH AN INVERTED SFC TROF EXTENDING N INTO WRN PA. EXPECTING SNOW IN THE HIGHER TERRAIN OF WV AND MD. SFC TEMPS SHOULD WARM ENOUGH OUTSIDE OF THE RIDGES TO PRECLUDE SNOW ACCUMULATION. WITH 2-4 INCHES PSBL IN THE WV/MD RIDGES WHERE COLDER TEMPS ARE PROGGED TO REMAIN. ISSUED A WINTER WEATHER ADVISORY FOR THE HIGHER TERRAIN IN COORDINATION WITH SURROUNDING WFO/S. THE UPR LOW IS PROGGGED TO OPEN INTO A TROF SUN AS COASTAL LOW DEVELOPMENT OCCURS OFF THE CAROLINAS. THE UPR TROF IS PROGGED TO CROSS THE UPR OH VLY RGN LATE SUN AND SUN NGT. A CROSSING WARM FRONT IN ZONAL FLOW SHOULD BRING WARMER TEMPS TUE.
SPOTTY LIGHT SNOWFALL IN THE HIGH COUNTRY AT THIS HOUR SHOULD ALSO GRADUALLY COME TO AN END THIS AFTERNOON. WARMER AIR WILL PUSH IN AHEAD OF AN UPPER LEVEL RIDGE SITTING OVER THE SW CONUS. THIS WILL HELP TO DISPLACE THE COOLER AIRMASS TO THE EAST DURING THE DAY SATURDAY. CLOUDS WILL LINGER SATURDAY MORNING AS MOISTURE SLOWLY MOVES SE WITH THE PROGRESSION OF THE UPPER LEVEL TROUGH AND JET.
ARCTIC HIGH PRESSURE ACROSS ALBERTA AND SASKATCHEWAN DRIFTS SLOWLY SOUTH THROUGH THE NRN HIGH PLAINS.
Another mostly sunny and mild day is in store for the Northern Rockies today and again on Sunday, as high pressure continues to be the dominant feature across the area. The ridge of high pressure will be shifting eastward and will allow for the next organized wet weather system to enter from the west.
RIDGE OF HIGH PRESSURE OVER THE AREA FOR THE NEXT 24 HOUR TO KEEP WEATHER CONDITIONS FAIRLY QUIET WITH LIGHT WINDS SLOWLY SWITCHING FROM NORTHEAST TO SOUTHEAST. WITH WARMER TEMPERATURES TOWARDS THE WEST AND MAINLY LOWER 60S OVER NORTHWEST WISCONSIN WHERE A LITTLE MORE CLOUD COVER AND THE LINGERING RIDGE KEEPS MIXING SHALLOWER. THE UPPER RIDGE WILL BREAK DOWN AND MOVE EAST WHICH WILL SIGNIFY A BIG CHANGE IN THE WEATHER PATTERN FROM HIGH AMPLITUDE WAVES TO MORE FAST ZONAL FLOW WITH EMBEDDED SHORT WAVES.
THERE WERE SOME CLOUDS IN THE NORTHWEST ASSOCIATED WITH THE UPPER TROUGH. EXPECT VFR CONDITIONS THROUGH THE NEXT 24 HOURS AS HIGH PRESSURE DOMINATES THE REGION.
1029 PM EDT WED APR 29 2015 WEAK HIGH PRESSURE OVER THE NORTHEAST US WILL SLOWLY MOVE EAST AS LOW PRESSURE DEVELOPS OVER THE MID ATLANTIC REGION ON THURSDAY. BUMPED UP POPS A BIT ALONG THE PA LINE THURSDAY EVENING AS THE NORTHERN PERIPHERY OF UPPER LOW WILL COMBINE WITH AN INCREASE IN 850-700MB MOISTURE TO PRODUCE SOME LIGHT SHOWERS. UNEVENTFUL WEATHER WILL BE FOUND ACROSS THE LOWER GREAT LAKES DURING THIS PERIOD.
EXPECTED THU MORNING LOWS IN THE LOWER/MID 50S LOOKS ON TARGET. UPPER LEVEL RIDGING WILL BUILD IN FROM THE SOUTHWEST. THE UPPER LEVEL RIDGING SHOULD BE SUFFICE TO KEEP ANY SHOWER ACTIVITY FROM FORMING.
AN UPPER TROUGH WILL CONTINUE TO MOVE EAST OF THE FORECAST AREA TONIGHT WITH SOME LINGERING SHOWERS REMAINING OVER THE SOUTHWEST WASHINGTON AND FAR NORTHWEST OREGON THIS EVENING.
509 PM MDT WED APR 29 2015 A RIDGE WILL RESIDE OVER THE ROCKIES/PLAINS TONIGHT AND THURSDAY.
RIDGING IS SETUP OVER THE ROCKIES. HIGH PRESSURE RIDGE EXTENDS FROM THE NORTHERN MISSISSIPPI VALLEY INTO SOUTHWEST TX. WEAK LOW PRESSURE IS SITUATED ACROSS THE NORTHERN ROCKIES. THE UPPER LOW OVER THE GREAT LAKES WILL CONTINUE TO DIVE SOUTH AND WILL BE OVER THE OHIO VALLEY BY THU MORNING AND THE TENNESSEE VALLEY BY THU EVENING. WARMING TREND WILL CONTINUE FOR THU WITH AREAS WEST OF I-135 GETTING INTO THE LOW 80S WITH THESE ABOVE NORMAL TEMPS PERSISTING INTO SAT. WOULD EXPECT STORMS TO AT LEAST DEVELOP OVER THE HIGH PLAINS TUE AFTERNOON/EVENING ALONG THE DRYLINE AND LIFT NORTHEAST OVERNIGHT AND POSSIBLY AFFECT OUR FORECAST AREA. LIGHT AND VARIABLE WINDS SHOULD CONTINUE OVERNIGHT AS RIDGE MOVES THROUGH.
THE LATEST WATER VAPOR IMAGERY DEPICTS A SHORT WAVE TROUGH MOVING NORTHWEST TO SOUTHEAST OVER CENTRAL ALABAMAN. WITH THE MEAN TROUGH FROM THE GREAT LAKES TO THE GULF COAST.
/ISSUED 302 PM CDT WED APR 29 2015/ WATER VAPOR AND OVERLAY OF 12Z RAOB DATA INDICATES TROUGHING IN THE EAST AND RIDGING IN THE WEST WITH NORTHERLY FLOW IN BETWEEN ACROSS THE CENTRAL STATES. MODEL GUIDANCE SHOWS A DEAMPLIFICATION OF THE FLOW PATTERN WITH A GRADUAL INCREASE IN MID LEVEL HEIGHTS ACROSS OUR AREA AS WEAKENING UPPER LEVEL RIDGE MOVES OUR WAY. LEE TROUGH CONTINUES TO STRENGTHEN TOMORROW SUFFICIENT ENOUGH FOR SOUTHERLY WINDS AROUND 10 TO 15 MPH.
754 PM EDT WED APR 29 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM WILL DROP SOUTH ACROSS THE CENTRAL GREAT LAKES LATER TONIGHT AND MOVE TO THE TENNESSEE VALLEY ON THURSDAY.
/ISSUED 400 PM CDT WED APR 29 2015/ ANOTHER COOL NIGHT IS IN STORE FOR THE REGION AS HIGH PRESSURE CONTINUES TO SETTLES ACROSS THE FOUR STATE REGION. A CLOSED UPPER LOW WILL MOVE SOUTH FROM EASTERN CANADA ACROSS THE GREAT LAKES AND INTO THE OHIO AND EASTERN TENNESSEE VALLEY. PROVIDING A DRY BACK DOOR COLD FRONT TO MOVE ACROSS THE AREA.
AN UPPER LEVEL LOW WILL BRING THE CHANCE FOR MORE LIGHT SHOWERS THURSDAY. HAVE UPDATED TO RAISE RAIN CHANCES IN THE VICINITY OF THE MAIN BAND OF RAIN AHEAD OF THE UPPER LOW. FORECAST PERIOD TO BEGIN WITH DEPARTING UPPER LOW SOUTH OF THE CWA SHEARING OUT AND SLIDING TOWARD THE MID ATLANTIC COAST. 120M HEIGHT RISES IN ITS WAKE THURSDAY NIGHT AS SHORT WAVE RIDGING QUICKLY FILLS IN BEHIND AND SETS THE STAGE FOR A NOTICEABLE WARMING TREND INTO THE WEEKEND.
724 PM EDT WED APR 29 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM WILL DROP SOUTH ACROSS THE CENTRAL GREAT LAKES LATER TONIGHT AND MOVE TO THE TENNESSEE VALLEY ON THURSDAY.
AN AREA OF LOW PRESSURE WILL CAUSE SHOWERS THROUGH THE REST OF THE WEEK. BUT FINALLY SOME LIGHT RAIN SHOWERS HAVE DEVELOPED ALONG OUR EASTERN PERIPHERY WITH THE ELEVATED HEATING SURFACES OF THE HIGH TERRAIN. THE TRACK OF THE LOW WILL KEEP MUCH OF THE ASSOCIATED PRECIPITATION JUST WEST OF THE FORECAST AREA THROUGH THE MORNING. THE AFOREMENTIONED DRY AIR CURRENTLY IN PLACE WILL BE SQUEEZED BETWEEN THE SHOWERS TO THE EAST AND THE LOW TO THE WEST. DRY AIR FINALLY ERODES AS THE LOW REACHES THE OHIO VALLEY THURSDAY EVENING AND RAIN SHOWERS WILL BE LIKELY HEADING INTO THURSDAY NIGHT. TAX AS THE UPPER LOW DEPARTS TOWARDS THE MID-ATLANTIC THURSDAY NIGHT.
LEAVING A BROAD UPPER RIDGE IN THE NORTHERN STREAM OVERHEAD IN ITS PLACE.
730 PM EDT WED APR 29 2015 LOW PRESSURE PASSES OFF SOUTHEAST COAST TONIGHT. VIGOROUS MID/UPPER LOW PRESSURE DIGS SOUTH FROM GREAT LAKES THURSDAY. HIGH PRESSURES FOR THE WEEKEND. A LOW PRESSURE WAVE. ACROSS THE HIGHER TERRAIN COUNTIES. AS AN UPPER LOW GRADUALLY DROPS SOUTH OUT OF THE GREAT LAKES AREA.
1045 PM EDT WED APR 29 2015 LOW PRESSURE OFF THE GA COAST WILL DEEPEN AS IT MOVES NORTHWARD ALONG THE SOUTHEAST COAST THROUGH THURSDAY.
1139 PM EDT WED APR 29 2015 AVIATION LOW PRESSURE DROPPING SOUTH THROUGH MICHIGAN TONIGHT AND THURSDAY WILL PRODUCE CONSIDERABLE CLOUDINESS AND POSSIBLY A FEW LIGHT RAIN SHOWERS.
AN UPPER LEVEL LOW WAS OVER EASTERN LAKE SUPERIOR THIS AFTERNOON WITH ANOTHER UPPER LEVEL LOW OVER SOUTHEAST MO. THE UPPER LEVEL LOW OVER EASTERN LAKE SUPERIOR WILL TRACK SOUTHWARD INTO EAST CENTRAL INDIANA BY NOON THU AND TO BE THE DOMINANT WEATHER SYSTEM TO AFFECT CENTRAL/SE IL NEXT 24 HOURS ESPECIALLY EASTERN IL. WILL KEEP A SLIGHT CHANCE OF ISOLATED SHOWERS IN THE EAST FOR THURSDAY AS THE UPPER LOW MOVES SOUTH.
UPPER LEVEL LOW OVER THE GREAT LAKES WILL DROP SOUTHWARD AND BRING US A CHANCE FOR SHOWERS ACROSS THE MID STATE. FOCUS WILL BE TOWARDS THE END OF THE 24-HR PERIOD WHEN AN UPPER LEVEL LOW CLIPS MIDDLE TN.
AND THE UPSTREAM CLOSED UPPER LOW THAT WILL BRING ADDITIONAL SHOWERS IS OVER LAKE SUPERIOR AND WILL NOT ARRIVE UNTIL TOMORROW.
COLD FRONT MAKING PROGRESS EAST ACROSS THE REGION THIS EVENING. UPPER TROUGH WORKING THROUGH IDAHO/WESTERN MONTANA TODAY WITH OUR UPPER WINDS BACKING WITH ITS APPROACH. SOME DECENT DESTABILIZATIONAHEAD OF THE ASSOCIATED COLD FRONT IS PROGGED TO OCCUR LATE TODAY IN OUR FAR WESTERN ZONES. THE COLD FRONT IS EXPECTED INTO BILLINGS AROUND 10 PM THIS EVENING.
HIGH PRESSURE ACROSS THE AREA WILL LEAD TO A CLEAR AND COOL NIGHT. QUIET AND COOL NIGHT IN STORE AS HIGH PRESSURE SETTLES ACROSS THE AREA. THE ATMOSPHERE WILL MODIFY THROUGH THE SHORT TERM AND ABUNDANT SUNSHINE WILL LEAD TO WARMER HIGHS THU WITH MOST AREAS IN THE LOW TO MID 80S.
THE PRIMARY COLD FRONT IS SOUTH OF THE AREA WITH A SECONDARY TROUGH AXIS CURRENTLY ANALYZED WEST TO EAST THROUGH GAINESVILLE AND ST AUGUSTINE. A DENSE CANOPY OF LOW CLOUDS ENCOMPASSES A LARGE AREA NORTH OF THIS BOUNDARY AS COOLER AIR WORKS IN FROM THE NORTH. NORTHEAST FLOW ON THE BACK SIDE OF A DEPARTING LOW PRESSURE SYSTEM WILL CONTINUE TO SPREAD SOUTH ACROSS THE WATERS TONIGHT WITH CAUTION CONDITIONS CONTINUING ACROSS THE OFFSHORE ZONES INTO THURSDAY MORNING. CONDITIONS WILL BRIEFLY IMPROVE BY THURSDAY EVENING AS HIGH PRESSURE MOVES ACROSS THE WATERS.
759 PM EDT WED APR 29 2015 WEAK HIGH PRESSURE OVER THE NORTHEAST US WILL SLOWLY MOVE EAST AS LOW PRESSURE DEVELOPS OVER THE MID ATLANTIC REGION ON THURSDAY. UNEVENTFUL WEATHER WILL BE FOUND ACROSS THE LOWER GREAT LAKES DURING THIS PERIOD.
743 PM EDT WED APR 29 2015 A POTENT UPPER LOW WILL MOVE SOUTH ACROSS THE AREA LATE TONIGHT INTO THURSDAY. AND COOLER TEMPERATURES.
STRATUS ACROSS MAINLY NRN TERMINALS SHOULD LIFT INTO MID MORNING WITH DRIER AIR MOVING IN FROM THE NW IN THE LOW LVLS AND CIGS LIFTING TO MVFR/VFR CAT 15Z- 16Z.
UPPER RIDGING REMAINING OVER COLORADO ON THURSDAY WILL BRING ONE MORE VERY WARM DAY TO THE FORECAST AREA. A SURFACE COLD FRONT WILL MOVE INTO NORTHEAST COLORADO TOMORROW EVENING. AN UPPER LEVEL DISTURBANCE MOVING OVER NORTHERN COLORADO AND SOUTHERN WYOMING WILL PUSH A COLD FRONT ACROSS NORTHEASTERN COLORADO LATE THURSDAY.
958 PM EDT WED APR 29 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM WILL DROP SOUTH ACROSS THE CENTRAL GREAT LAKES LATER TONIGHT AND MOVE TO THE TENNESSEE VALLEY ON THURSDAY.
1123 PM CDT WED APR 29 2015 BEAUTIFUL WEATHER WILL CONTINUE TO HOLD UP THROUGH THE REST OF TODAY AND TONIGHT AS HIGH PRESSURE CONTINUES TO DOMINATE THE REGION. BUT KEPT LOWS GENERALLY IN THE LOW 40S WITH WINDS AROUND 5 KTS MUCH OF THE NIGHT.
1056 PM EDT WED APR 29 2015 A BACKDOOR COLD FRONT PUSHES TO THE SOUTHWEST OF THE AREA THIS EVENING. FOLLOWED BY WEAK HIGH PRESSURE BUILDING DOWN FROM SOUTHEASTERN CANADA THROUGH THURSDAY NIGHT.
THE LATEST WATER VAPOR IMAGERY DEPICTS A SHORT WAVE TROUGH MOVING NORTHWEST TO SOUTHEAST OVER CENTRAL ALABAMAN. WITH THE MEAN TROUGH FROM THE GREAT LAKES TO THE GULF COAST. THE ISOLATED SHOWERS ARE THANKS TO UPPER LEVEL SHORT WAVES ROTATING AROUND THE MAIN UPPER LOW WHICH IS CURRENTLY DIGGING INTO THE UPPER MISSISSIPPI RIVER VALLEY AND GREAT LAKES AREAS. HIGH PRESSURE WILL THEN TRANSITION DOWN THE MISSISSIPPI RIVER VALLEY AS WE END THE WEEK AND MOVE INTO THE WEEKEND AND THEN SETTLING OVER THE DEEP SOUTH.
748 PM EDT WED APR 29 2015 LOW PRESSURE ALONG THE EAST COAST OF FLORIDA WILL DEEPEN AS IT MOVES NORTHWARD ALONG THE SOUTHEAST COAST THROUGH THURSDAY.
801 PM EDT WED APR 29 2015 COLD FRONT MOVING THROUGH THIS EVENING AND TONIGHT WILL BRING A SMALL CHANCE FOR RAIN TO THE REGION. AN UPPER LEVEL LOW WILL MOVE THROUGH TOMORROW BRINGING ANOTHER LOW CHANCE FOR SOME RAIN. FORECAST PERIOD TO BEGIN WITH DEPARTING UPPER LOW SOUTH OF THE CWA SHEARING OUT AND SLIDING TOWARD THE MID ATLANTIC COAST. 120M HEIGHT RISES IN ITS WAKE THURSDAY NIGHT AS SHORT WAVE RIDGING QUICKLY FILLS IN BEHIND AND SETS THE STAGE FOR A NOTICEABLE WARMING TREND INTO THE WEEKEND.
910 PM PDT WED APR 29 2015 HIGH PRESSURE OVER THE SOUTHWEST WILL BRING SUNNY.
FORECAST IS ON TRACK TONIGHT WITH AN UPPER LOW CONTINUING TO PASS THROUGH THE FORECAST AREA OVERNIGHT. DRY CONDITIONS EXPECTED WITH NO CHANGES TO THE LOW TEMPS. A REINFORCING COLD FRONT DIVING SWD ACROSS THE AREA DURING THE LATE MORNING HRS WILL THEN TRANSLATE INTO NW WINDS INCREASING INTO THE 12-14KT RANGE WITH HIGHER GUSTS.
RIDGING IS SETUP OVER THE ROCKIES. HIGH PRESSURE RIDGE EXTENDS FROM THE NORTHERN MISSISSIPPI VALLEY INTO SOUTHWEST TX. WEAK LOW PRESSURE IS SITUATED ACROSS THE NORTHERN ROCKIES. THE UPPER LOW OVER THE GREAT LAKES WILL CONTINUE TO DIVE SOUTH AND WILL BE OVER THE OHIO VALLEY BY THU MORNING AND THE TENNESSEE VALLEY BY THU EVENING. WARMING TREND WILL CONTINUE FOR THU WITH AREAS WEST OF I-135 GETTING INTO THE LOW 80S WITH THESE ABOVE NORMAL TEMPS PERSISTING INTO SAT. WOULD EXPECT STORMS TO AT LEAST DEVELOP OVER THE HIGH PLAINS TUE AFTERNOON/EVENING ALONG THE DRYLINE AND LIFT NORTHEAST OVERNIGHT AND POSSIBLY AFFECT OUR FORECAST AREA. LAWSON LIGHT AND VARIABLE WINDS EXPECTED AS RIDGE MOVES THROUGH.
A SPOKE OFF THE UPPER LOW OVER THE UPPER MIDWEST AND LOW PRESSURE EXITING FLORIDA OVER THE ATLANTIC IS PUSHING A COLD FRONT SOUTH GENERATING SOME SHOWERS OVER THE NORTHERN GULF AND NORTH FLORIDA. AS THE COLD FRONT PASSES THE AREA WILL RETURN TO MORE TEMPERATURES BELOW NORMAL FOR THE NEXT SEVERAL DAYS. AN AREA OF LOW PRESSURE OVER FLORIDA WILL MOVE OVER THE ATLANTIC AND PUSH A COLD FRONT THROUGH OVERNIGHT.
847 PM EDT WED APR 29 2015 LOW PRESSURE EAST OF NOVA SCOTIA WILL MOVE TO THE EAST TONIGHT. HIGH PRESSURE WILL THEN BUILD ACROSS THE REGION LATER THURSDAY THROUGH THE WEEKEND. ORGNL DISC: A BROAD CLOSED UPPER LOW THAT HAS AFFECTED THE AREA FOR NEARLY A WEEK WILL CONTINUE TO INFLUENCE FORECAST AREA WEATHER TONIGHT AND TOMORROW. THE UPPER LOW WILL FILL AND MOVE EASTWARD THROUGH THE PERIOD. WINDS WILL CONTINUE TO DECREASE AS HIGH PRESSURE BUILDS THROUGH THE PERIOD. WEAK IMPULSES MOVING AROUND THE UPPER LOW WILL GENERATE THE THREAT OF LIGHT RAIN SHOWERS THROUGH THURSDAY WITH AMOUNTS OF JUST A HUNDREDTH OF AN INCH OR SO.
THESE SHOWERS AND THUNDERSTORMS WERE DUE IN PART TO A LOW PRESSURE LIFTING NORTHEASTWARD OFF THE CAROLINA COAST. TEMPERATURES HAVE RECOVERED FROM RAIN COOLED LOWS IN THE LOWER 70S. HEALTHY CONFLUENT CYCLONIC FLOW REMAINS THROUGH THE LOWER LEVELS. ISOLATED SHOWERS EARLY SHOULD GIVE WAY TO A CHANCE OF SHOWERS AND PERHAPS A FEW THUNDERSTORMS AS LARGE SCALE TROUGHING REMAINS ALOFT. THIS EVENING'S RAOB OBSERVATION FROM EYW DEPICTED A STABLE LAYER IN THE LOWER TROPOSPHERE. THE VEERING PROFILE IN THE LOWER LEVELS WILL PROVIDE A SHORT WINDOW (LATER TONIGHT) TO DESTABILIZE THE PROFILE AND CONTRIBUTE TO MVFR RAIN CHANCES AT BOTH TERMINALS (EYW AND MTH).
/ISSUED 324 PM EDT WED APR 29 2015/ AN UPPER LEVEL LOW THAT KICKED EAST OF TEXAS OVERNIGHT HAS LEFT AN UPPER TROUGH OVER THE STATE THIS AFTERNOON. AN UPPER LOW WILL PERSIST OVER THE OHIO VALLEY REGION ON THURSDAY. INCREASING CLOUDS THURSDAY AFTERNOON ASSOCIATED WITH THE EXPECTED NW FLOW DISTURBANCE HAS WARRANTED LEANING SLIGHTLY COOLER THEN GUIDANCE FOR HIGHS ON THURSDAY.
/ISSUED 252 PM EDT WED APR 29 2015/ MAIN CONCERN THIS AFTERNOON IS THE POTENTIAL FOR ADDITIONAL CONVECTION OUT AHEAD OF AN APPROACHING COLD FRONT. THE COLD FRONT IS STILL PROGGED TO PUSH THROUGH THE AREA LATER THIS EVENING WITH A SLIGHT POSSIBILITY OF ADDITIONAL ORGANIZED SHOWERS AND THUNDERSTORMS OUT AHEAD OF IT. THE AFOREMENTIONED COLD FRONT SHOULD THEN CLEAR THE AREA OVERNIGHT TONIGHT AND INTO THURSDAY TAKING VIRTUALLY ALL OF THE PRECIPITATION WITH IT.
1204 AM EDT THU APR 30 2015 LOW PRESSURE EAST OF NOVA SCOTIA WILL MOVE TO THE EAST OVERNIGHT. HIGH PRESSURE WILL THEN BUILD ACROSS THE REGION LATER THURSDAY THROUGH THE WEEKEND. MOISTURE CONTINUES TO ROTATE AROUND AN UPPER LOW IN THE NW ATLANTIC. A BROAD CLOSED UPPER LOW THAT HAS AFFECTED THE AREA FOR NEARLY A WEEK WILL CONTINUE TO INFLUENCE FORECAST AREA WEATHER TONIGHT AND TOMORROW. THE UPPER LOW WILL FILL AND MOVE EASTWARD THROUGH THE PERIOD. WINDS WILL CONTINUE TO DECREASE AS HIGH PRESSURE BUILDS THROUGH THE PERIOD. WEAK IMPULSES MOVING AROUND THE UPPER LOW WILL GENERATE THE THREAT OF LIGHT RAIN SHOWERS THROUGH THURSDAY WITH AMOUNTS OF JUST A HUNDREDTH OF AN INCH OR SO.
AS COOL AIR PUSHES OFF THE MAINLAND IN RESPONSE TO STRONG HIGH PRESSURE MOVING SOUTHWARD FROM CANADA TO THE MISSISSIPPI RIVER VALLEY AND CENTRAL GULF STATES.
631 PM CDT WED APR 29 2015 BEAUTIFUL WEATHER WILL CONTINUE TO HOLD UP THROUGH THE REST OF TODAY AND TONIGHT AS HIGH PRESSURE CONTINUES TO DOMINATE THE REGION. BUT KEPT LOWS GENERALLY IN THE LOW 40S WITH WINDS AROUND 5 KTS MUCH OF THE NIGHT.
FOCUS WILL BE TOWARDS THE END OF THE 24-HR PERIOD WHEN AN UPPER LEVEL LOW CLIPS MIDDLE TN. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL DROP SOUTHWARD FROM MICHIGAN. THIS SYSTEM WILL ALSO BRING A SHOT OF SLIGHTLY COOLER AIR. SO HIGHS TOMORROW WILL BE A FEW DEGREES COOLER. OVERNIGHT LOWS WILL CONTINUE THE COOLER THAN NORMAL TREND. AS A RIDGE BUILDS ACROSS THE REGION. HIGHS WILL BE MOSTLY IN THE LOWER 80S.
935 PM CDT WED APR 29 2015 CLEAR SKIES WITH LIGHT WINDS AND LOW DEW POINTS MEAN ANOTHER COOL NIGHT WITH LOWS A FEW DEGREES WARMER THAN LAST NIGHT IN MOST LOCATIONS.
/ISSUED 935 PM CDT WED APR 29 2015/ CLEAR SKIES WITH LIGHT WINDS AND LOW DEW POINTS MEAN ANOTHER COOL NIGHT WITH LOWS A FEW DEGREES WARMER THAN LAST NIGHT IN MOST LOCATIONS.
658 PM CDT WED APR 29 2015 AN UPPER LEVEL LOW WAS OVER EASTERN LAKE SUPERIOR THIS AFTERNOON WITH ANOTHER UPPER LEVEL LOW OVER SOUTHEAST MO. THE UPPER LEVEL LOW OVER EASTERN LAKE SUPERIOR WILL TRACK SOUTHWARD INTO EAST CENTRAL INDIANA BY NOON THU AND TO BE THE DOMINANT WEATHER SYSTEM TO AFFECT CENTRAL/SE IL NEXT 24 HOURS ESPECIALLY EASTERN IL. WILL KEEP A SLIGHT CHANCE OF ISOLATED SHOWERS IN THE EAST FOR THURSDAY AS THE UPPER LOW MOVES SOUTH.
BRISK SURFACE WINDS FOLLOWING A PACIFIC COLD FRONT WILL REMAIN GUSTY INTO THE THE EVENING.
UPPER LEVEL LOW OVER THE GREAT LAKES WILL DROP SOUTHWARD AND BRING US A CHANCE FOR SHOWERS ACROSS THE MID STATE.
THE 8 PM EDT REGIONAL SURFACE ANALYSIS SHOWED A WEAK FRONTAL CYCLONE OFF THE GA COAST, AND A WEAK TROUGH EXTENDING WEST FROM THIS LOW TO APALACHICOLA. SCATTERED SHOWERS WERE DEVELOPING ALONG THIS TROUGH, THOUGH VERY DRY, SINKING AIR ALOFT WAS LIMITING THEIR VERTICAL EXTENT (I.
HIGH PRESSURE BUILDS IN LATER FRIDAY THROUGH THIS WEEKEND WITH DRIER AIR.
BANDS OF SNOW SHOWERS PERSIST ACROSS SW VA AND NE TN BEHIND A DPEARTING MID/UPPER LEVEL TROUGH. HIGH AND MIDLEVEL CLOUDS INCREASE TONIGHT AHEAD OF A BROAD AND MOISTURE- STARVED UPPER TROUGH.
VFR CONDITIONS PREVAIL THROUGH THE PERIOD WITH HIGH PRESSURE SETTLED OVER THE REGION. STRONG UPPER RIDGE OVER THE WESTERN U. WILL PERSIST TONIGHT AND THEN SHIFT EAST ON FRIDAY AS THE RIDGE AXIS MOVES TO THE CONTINENTAL DIVIDE. DRY, STABLE, AND MILD CONDITIONS WILL CONTINUE FRIDAY WITH TEMPERATURES REACHING THE LOWER 60S SOME AREAS. THE RIDGE BECOMES FLATTENED FRIDAY NIGHT AS A PACIFIC UPPER TROF RAPIDLY MOVES ACROSS THE PACIFIC NORTHWEST RESULTING IN A FEW SHOWERS NEAR GLACIER NATIONAL PARK. THE TROF MOVES ACROSS THE AREA SATURDAY. SNOW WILL DEVELOP OVER THE WESTERN AND SOUTHWEST MOUNTAINS LATE FRIDAY/EARLY SATURDAY AS AN ASSOCIATED COLD FRONT MOVES ACROSS THE AREA.
939 PM PST THU FEB 25 2016 A ridge of high pressure will deliver one more day of mild conditions. This will result in cooler, wet, and unsettled weather. Scattered mid and high clouds will move across the region tonight ahead of an approaching upper level trough. With the lower levels dry initially CIGS are expected to remain VFR through 06z Saturday.
A FAST MOVING COLD FRONT WILL DROP SOUTH OF THE COAST SHORTLY AFTER SUNSET THIS EVENING. ON FRIDAY NORTHWESTERLY FLOW BECOMES EVEN LIGHTER AS A HIGH PRESSURE RIDGE BUILDS ACROSS THE FCST AREA FROM THE WEST. LOWS TONIGHT RANGING FROM THE LOW TO MID 30S OVER INTERIOR COUNTIES.
927 PM MST THU FEB 25 2016 THE LONG WAVE PATTERN SUPPORTS A RIDGE OF HIGH PRESSURE OVER THE WESTERN PORTION OF NORTH AMERICA WITH LOW PRESSURE ACROSS THE EASTERN HALF. IT APPEARS AN ASSOCIATED COLD FRONT WILL DROP INTO THE FAR NORTHEAST UT LATE SAT AFTERNOON.