Alert archive / West Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, WV

July 30, 2012Barbour County, West Virginia

NWS Charleston, WV issued this special weather statement at Jul 30, 2012, 6:20 PM EDT for Barbour County, West Virginia. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 30, 2012, 6:20 PM EDT (22:20 UTC)
Expired
Jul 30, 2012, 7:15 PM EDT
In force
55 min
Issued by
NWS Charleston, WV

County Barbour County, WV

The radar

The Pittsburgh radar (KPBZ), 163 km from the middle of the area, began a volume at 22:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.3 hours before the alert went out and 149 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2012-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2012-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
18 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1458 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
5 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, WV wrote its last area forecast discussion before this special weather statement went out at Jul 30, 2:30 PM EDT, 3 hours 50 minutes earlier.

Area forecast discussion, Jul 30, 2:30 PM EDT, 3 hours 50 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON WV
230 PM EDT MON JUL 30 2012

.SYNOPSIS...
WEAK HIGH PRESSURE SLIDES EASTWARD MONDAY NIGHT. UPPER LEVEL
DISTURBANCE PASSES TUESDAY AND TUESDAY NIGHT. HIGH PRESSURE
CROSSES WEDNESDAY THROUGH THURSDAY.

&&

.NEAR TERM /THROUGH TUESDAY/...
INFLUENCES OF HIGH PRESSURE WILL BE SLOW TO RELINQUISH CONTROL
AFTER TODAY...BUT A GREAT LAKES SURFACE LOW WITH AN EMBEDDED SHORT
WAVE TROUGH IN THE NORTHWEST FLOW ALOFT WILL PUT AN END TO THE
BRIEF DRY SPELL FOR OUR AREA. THIS IS SAID DESPITE THE FACE A FEW
DAYTIME HEATING ELEVATED THUNDERSTORMS ARE OCCURRING...AND WILL
CONTINUE TO OCCUR UNTIL LATER THIS EVENING. INITIATION OF
CONVECTION WILL BE RELEGATED TO THE EASTERN MOUNTAINS...BUT MAY
DRIFT TO THE NORTH AND CLIP THE EASTERN LOWLANDS WITH THEIR
FORWARD MOTION. OTHERWISE...LOWLAND AREAS ARE CAPPED IN THE MID
LEVELS...AND LARGELY STARVED OF ANY APPRECIABLE MOISTURE DEPTH.

OVERNIGHT PERIOD GETS A LITTLE BIT TRICKIER WITH THE NAM HINTING
AT AN INCREASE IN THE DEPTH SLIGHTLY TONIGHT WHILE
MAINTAINING ELEVATED CAPE. AS A RESULT...DID NOT GO COMPLETELY
CLEAR...AND GAMBLED ON NO POPS AFTER 04Z...BUT CAN ENVISION A PESKY
SMALL CELL OR TWO HANGING AROUND. THIS WILL BE ONE OF THOSE TIMES
WHERE LOW POPS AND LOW SKIES WILL COEXIST SIMULTANEOUSLY. DO
THINK THAT THERE WILL BE PLENTY OF CLEAR PATCHES...AND FOG
DEVELOPMENT SHOULD BE GOOD TO GO.

WEAK LOW PRESSURE SYSTEM AND EMBEDDED TROUGH ALOFT APPROACHES
TUESDAY...WARRANTING AN INCREASE IN THE POPS...WITH LIKELIES
POSSIBLE. ATMOSPHERE WILL BE PRIMED AND READY TO GO WITH PWAT
VALUES BACK TO THE 1.5 INCH RANGE. MAY TAKE A FEW HOURS DURING THE
AFTERNOON TO ERODE A WEAKER MID LEVEL CAP...WITH BUFR SOUNDINGS
SHOWING THIS ACHIEVED BY 00Z WEDNESDAY.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY NIGHT/...
THE AFOREMENTIONED SYSTEM WILL DROP SOUTHEASTWARD ACROSS THE AREA
TUESDAY NIGHT AND WEDNESDAY...WITH THE MODELS IN DECENT AGREEMENT.
THE BEST CHANCE OF STORMS WILL CONTINUE TUESDAY NIGHT INTO EARLY
WEDNESDAY...THEN DECREASE FROM NORTHWEST TO SOUTHEAST UNTIL THE
SYSTEM EXITS THE MOUNTAINS LATER WEDNESDAY. ALTHOUGH THIS LOOKS TO BE
ANOTHER TYPICAL SUMMER CASE OF THE SURFACE FRONT ITSELF WASHING OUT
AS IT MOVES THROUGH OUR AREA...THE UPPER SYSTEM AND DRIER AIR ALOFT
WILL CONTINUE MOVING SOUTHEAST AND EXIT LATER WEDNESDAY...TAKING THE
STORMS WITH IT. SO BY WEDNESDAY NIGHT...HAVE TERMINATED ALL POPS.
THIS SYSTEM WILL NOT BE AS WET OR UNSTABLE AS PREVIOUS SYSTEMS WITH
THE DEEPER MOISTURE AND HEAT REMAINING TO OUR SOUTH AND WEST.
STILL...A FEW STRONG STORMS ARE NOT OUT OF THE QUESTION.

WEAK HIGH PRESSURE WILL BUILD IN FOR THURSDAY AND FRIDAY...WITH ANY
LINGERING LOW LEVEL MOISTURE AND CLOUDS LEFT BEHIND MIXING OUT
THURSDAY MORNING FOR AFTERNOON SUNSHINE. EXPECT SUNSHINE TO CONTINUE
ON FRIDAY. TEMPERATURES WILL NOT REALLY COOL BEHIND THIS SYSTEM
THURSDAY WITH DRIER AIR AND MORE SUNSHINE...BUT HUMIDITIES WILL BE
LOWER THURSDAY. SO LOOK FOR TEMPERATURES WEDNESDAY AND THURSDAY NEAR
90 DEGREES...BUT LOWER HUMIDITY THURSDAY.

&&

.LONG TERM /FRIDAY THROUGH MONDAY/...
HEIGHTS ONCE AGAIN BUILD IN FROM THE WEST FRIDAY WITH THE BERMUDA
HIGH STRENGTHENING...ALLOWING THE HEAT AND HUMIDITY TO MOVE BACK IN
FROM THE SOUTHWEST. CHANCES FOR STORMS INCREASE BY THE WEEKEND AS
ANOTHER NORTHWEST FLOW SYSTEM AND ATTENDING COLD FRONT DROP
SOUTHEASTWARD TOWARD THE AREA. TEMPS WILL ALSO WARM BACK INTO THE
90S AHEAD OF THE FRONT.

&&

.AVIATION /19Z MONDAY THROUGH SATURDAY/...
ISOLATED TO SCATTERED CONVECTION CONTINUES IN THE MOUNTAINS
THROUGH THIS EVENING. SKY LIKELY TO NOT COMPLETELY CLEAR AS THE
MID LEVEL RH INCREASES...BUT ENOUGH CLEAR PATCHES THROUGH THE
NIGHT WILL ALLOW VALLEY FOG DEVELOPMENT. MOST TERMINALS LIFR BY
DAWN...AND SLOW IMPROVEMENT POSSIBLY TAKING 2 HOURS AFTER DAWN TO
ACHIEVE VFR ONCE AGAIN. VFR TUESDAY...BUT LIKELY TO SEE MORE
AREAL COVERAGE OF THUNDERSTORMS IN THE AFTERNOON AND
EVENING...LIKELY NECESSITATING VCTS/CB. TSRA WILL NOT BE OUT OF
THE QUESTION.

FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 18Z TUESDAY...

FORECAST CONFIDENCE: MEDIUM TO HIGH.

ALTERNATE SCENARIOS: TIMING AND DENSITY OF FOG COULD VARY DUE TO
PATCHES OF PASSING CLOUD COVER. OBSERVATIONS MAY BOUNCE SLIGHTLY.

EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY
OF WFO FORECAST TO AVAILABLE MODEL INFORMATION:
H = HIGH:   TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.
M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS.
L = LOW:    TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.

UTC 1HRLY       18   19   20   21   22   23   00   01   02   03   04   05
EDT 1HRLY       14   15   16   17   18   19   20   21   22   23   00   01
CRW CONSISTENCY  H    H    H    H    H    H    H    H    H    H    M    M
HTS CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    M
BKW CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H
EKN CONSISTENCY  H    H    H    H    H    H    H    H    H    M    H    L
PKB CONSISTENCY  H    H    H    H    H    H    H    H    H    H    M    M
CKB CONSISTENCY  H    H    H    H    H    H    H    H    H    H    M    M

AFTER 18Z TUESDAY...
BRIEF IFR POSSIBLE IN SCATTERED SHOWERS AND THUNDERSTORMS TUESDAY
AFTERNOON THROUGH WEDNESDAY.

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...NONE.
OH...NONE.
KY...NONE.
VA...NONE.

&&

SYNOPSIS...JMV/26
NEAR TERM...26
SHORT TERM...JMV
LONG TERM...JMV
AVIATION...26
Hazardous weather outlook, Jul 30, 2:07 AM EDT, 16 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON WV
207 AM EDT MON JUL 30 2012

KYZ101>103-105-OHZ066-067-075-076-083>087-VAZ003-004-WVZ005>011-
013>020-024>040-046-047-310615-
GREENUP-CARTER-BOYD-LAWRENCE KY-PERRY-MORGAN-ATHENS-WASHINGTON-
JACKSON OH-VINTON-MEIGS-GALLIA-LAWRENCE OH-DICKENSON-BUCHANAN-WAYNE-
CABELL-MASON-JACKSON WV-WOOD-PLEASANTS-TYLER-LINCOLN-PUTNAM-KANAWHA-
ROANE-WIRT-CALHOUN-RITCHIE-DODDRIDGE-MINGO-LOGAN-BOONE-CLAY-BRAXTON-
GILMER-LEWIS-HARRISON-TAYLOR-MCDOWELL-WYOMING-RALEIGH-FAYETTE-
NICHOLAS-WEBSTER-UPSHUR-BARBOUR-POCAHONTAS-RANDOLPH-
207 AM EDT MON JUL 30 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST
KENTUCKY...SOUTHEAST OHIO...SOUTHWEST VIRGINIA AND MUCH OF WEST
VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 30, 5:09 PM EDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
509 PM EDT MON JUL 30 2012

WVZ040-047-302145-
BARBOUR WV-RANDOLPH WV-
509 PM EDT MON JUL 30 2012

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL RANDOLPH AND
SOUTHEASTERN BARBOUR COUNTIES...

AT 506 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER ELKINS...
MOVING NORTHEAST AT 15 MPH.

WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR ELKINS AROUND 515 PM...BELINGTON AROUND 525
PM...KERENS AROUND 540 PM AND MONTROSE AROUND 545 PM.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON
SMALL CREEKS AND STREAMS...AND PONDING OF WATER ON COUNTRY ROADS AND
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3879 7984 3882 8006 3925 7985 3925 7982
      3923 7980 3913 7983 3911 7980 3909 7978
      3904 7977 3901 7965 3900 7964

08
Special weather statement, Jul 30, 5:36 PM EDT, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
536 PM EDT MON JUL 30 2012

WVZ037-302230-
NICHOLAS WV-
536 PM EDT MON JUL 30 2012

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL NICHOLAS COUNTY...

AT 530 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES NORTHEAST
OF SUMMERSVILLE...MOVING NORTH AT 10 MPH.

WIND GUSTS TO 50 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS
STORM.

THIS STORM WILL BE NEAR CALVIN AROUND 550 PM AND BIRCH RIVER AROUND
630 PM.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON
SMALL CREEKS AND STREAMS...AND PONDING OF WATER ON COUNTRY ROADS AND
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3841 8066 3839 8065 3826 8075 3828 8084
      3839 8086 3855 8081 3856 8078 3852 8074
      3853 8073 3853 8068 3852 8066 3850 8068
      3843 8064

08
Local storm report, Jul 30, 5:54 PM EDT, 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
554 PM EDT MON JUL 30 2012

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0541 PM     HAIL             SUMMERSVILLE            38.35N 80.86W
07/30/2012  U0.75 INCH       NICHOLAS           WV   PUBLIC

            EVENT OCCURRED
		541 PM 07/30/2012

&&

NNNN
Local storm report, Jul 30, 6:08 PM EDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
608 PM EDT MON JUL 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0548 PM     TSTM WND DMG     2 ESE SUMMERSVILLE      38.27N  80.81W
07/30/2012                   NICHOLAS           WV   911 CALL CENTER

            TREES AND LINES DOWN ALONG WEBSTER ROAD

&&

EVENT NUMBER RLX1200476

LZ
Local storm report, Jul 30, 6:10 PM EDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
610 PM EDT MON JUL 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0550 PM     FLASH FLOOD      4 NE SUMMERSVILLE       38.33N  80.79W
07/30/2012                   NICHOLAS           WV   911 CALL CENTER

            ROAD FLOODING IN GLADE CREEK.

&&

EVENT NUMBER RLX1200477

LZ
Special weather statement, Jul 30, 6:20 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
620 PM EDT MON JUL 30 2012

WVZ032-040-302315-
BARBOUR WV-TAYLOR WV-
620 PM EDT MON JUL 30 2012

...A STRONG THUNDERSTORM WILL AFFECT BARBOUR AND TAYLOR COUNTIES...

AT 612 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF
AUDRA STATE PARK...MOVING NORTH AT 15 MPH.

WIND GUSTS TO 45 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR PHILIPPI AROUND 645 PM...MOATSVILLE AROUND
700 PM AND GALLOWAY AROUND 710 PM.

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3908 7986 3902 7988 3901 7989 3899 8005
      3901 8005 3902 8006 3903 8005 3904 8007
      3926 8014 3930 7989

08

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 30, 3:14 PM EDTSpecial Weather StatementRLXMcDowell, Raleigh, Wyoming61 min
Jul 30, 4:50 PM EDTSpecial Weather StatementRLXCalhoun40 min
Jul 30, 5:09 PM EDTSpecial Weather StatementRLXBarbour36 min
Jul 30, 5:36 PM EDTSpecial Weather StatementRLXNicholas54 min
Jul 30, 5:41 PM EDTSevere Thunderstorm WarningRLXNicholas64 min
Jul 30, 6:11 PM EDTSevere Thunderstorm WarningRLXPocahontas, Randolph26 min
Jul 30, 6:30 PM EDTSpecial Weather StatementRLXKanawha60 min
Jul 30, 6:39 PM EDTSpecial Weather StatementRLXUpshur66 min
Jul 30, 7:17 PM EDTSevere Thunderstorm WarningRLXKanawha39 min
Jul 30, 7:31 PM EDTSevere Thunderstorm WarningRLXPocahontas, Randolph24 min
Jul 30, 7:53 PM EDTSpecial Weather StatementRLXBoone67 min

Nearby

Special Weather Statements in West Virginia, 2012Every special weather statement in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.