Alert archive / West Virginia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 42, NWS Charleston, WV

May 30, 2009Cabell County, West Virginia; Lawrence County, Ohio; Boyd County, Kentucky

NWS Charleston, WV issued this severe thunderstorm warning at May 30, 2009, 9:17 PM EDT for Cabell County, West Virginia; Lawrence County, Ohio; Boyd County, Kentucky. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 30, 2009, 9:17 PM EDT (01:17 UTC)
Expired: May 30, 2009, 10:15 PM EDT
In force: 58 min
Issued by: NWS Charleston, WV
Area: Storm-based polygon

Counties Boyd County, KY, Lawrence County, OH, Cabell County, WV

The radar

The Charleston,WV radar (KRLX), 69 km from the middle of the area, began a volume at 01:16 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 30, 4:49 PM EDT	Severe Thunderstorm Watch	SPC	11 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 1.3 hours before the alert went out and 157 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 500 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1374 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 246 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 30, 7:35 PM EDT, 1 hour 42 minutes earlier.

Area forecast discussion, May 30, 7:35 PM EDT, 1 hour 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON WV
735 PM EDT SAT MAY 30 2009

.SYNOPSIS...
A LOW PRESSURE CENTER MOVES ACROSS TONIGHT.  A COLD FRONT CROSSES
SUNDAY MORNING. HIGH PRESSURE SUNDAY AFTERNOON INTO EARLY NEXT WEEK.
NEXT COLD MOVES IN TUESDAY NIGHT OR WEDNESDAY.

&&

.NEAR TERM /THROUGH SUNDAY/...
SHOWERS ALONG FRONT THAT WASHED OUT ACROSS CNTRL WV TODAY HAVE NOT
COMPLETELY GONE AWAY...WITH NEW SHOWERS ALREADY FORMING ALONG THIS
AXIS IN THE WESTERN PORTION OF THE CWA.  EXPECT ACTIVITY WILL
CONTINUE TO INCREASE IN THE AFTERNOON HEATING AND IN ADVANCE OF WEAK
LOW PRESSURE APPROACHING FROM W KY...ACROSS THE SW PORTION OF THE
CWA...THEN WORKING E THIS EVENING.

MODELS HAVE BACKED OFF ON PW VALUES AND INSTABILITY...WITH THE
JUICIEST AIR TO THE W.  FREEZING LEVEL AND STRENGTH OF FLOW CAN
STILL SUPPORT MARGINALLY SEVERE HAIL AND WIND IN AND NEAR NE KY
WHERE SLT RISK IS.  USED NEWLY WRITTEN EDIT AREA FROM MODEL
PARAMETER TOOL TO HELP WITH PLACEMENT AND TIMING OF HIGHEST POPS AND
BEST CHANCE FOR THUNDERSTORMS.  MODELS SHOW PRECIPITATION HANGING ON
A LITTLE LONGER IN THE MOUNTAINS EARLY SUNDAY MORNING AS A COLD
FRONT MOVES IN FROM THE N.

HIGH PRESSURE BEGINS TO BUILD INTO THE AREA BEHIND THE FRONT SUNDAY
AFTERNOON BRINGING ABOUT CLEARING.

GUIDANCE LOOKS REASONABLE FOR TONIGHT AND SUNDAY...WITH A BLEND
WHERE DIFFERENCES SHOW UP IN A HTS-CRW-EKN AXIS SUNDAY.

&&

.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/...
FIRST PART OF THE EXTENDED PERIOD WILL REMAIN DRY AS UPPER LEVEL
RIDGING OVER THE SE U.S. REMAINS IN CONTROL. THIS WILL CREATE MOSTLY
SUNNY SKIES...WITH THE EXCEPTION OF SOME AFTERNOON CU...AND WARMER
TEMPERATURES ACROSS THE REGION FOR THE FIRST PART OF THE WORK WEEK.
HUMIDITY WILL ALSO BE ON THE INCREASE EARLY IN THE EXTENDED AS THE
SURFACE HIGH SHIFTS TO THE EAST...AND FLOW BECOMES MORE
SOUTHWESTERLY.

&&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
NAM CONTINUES TO BE FASTER WITH THE FRONT NEXT WEEK. HOWEVER...HAVE
CONTINUED TO TREND THE FORECAST MORE TOWARDS THE GFS WHICH IS SLOWER
WITH THE BREAK DOWN OF THE RIDGE...BRINGING THE FRONT INTO THE
REGION TUESDAY NIGHT/EARLY WEDNESDAY...AND THEN SLOWLY SAGGING SOUTH
OF THE REGION.  THIS WILL BRING A RETURN OF SHOWERS AND
THUNDERSTORMS TO THE REGION ONCE AGAIN. MUCH OF THE FORECAST AREA
WILL BEGIN TO DRY OUT TOWARDS THE END OF THE WORK WEEK...ALTHOUGH
HAVE CONTINUED TO MAINTAIN AT LEAST A SLIGHT CHANCE OF POPS IN THE
FORECAST...MAINLY IN THE SOUTHERN PART OF THE CWA AND OVER THE
HIGHER TERRAIN...AS DISTURBANCES CONTINUE TO MOVE THROUGH THE FLOW.
MODELS INDICATE ANOTHER FRONT MOVING INTO THE REGION AT THE END OF
THE EXTENDED PERIOD.

&&

.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
COLD FRONT TO SAG DOWN ACROSS SOUTHERN WEST VIRGINIA TONIGHT AND
SUNDAY. SCATTERED SEVERE THUNDERSTORMS WITH MVFR TO IFR CONDTIONS
WILL BE COMMON THROUGH MIDNIGHT TONIGHT. MVFR OR WORSE LOW CLOUDS
ARE LIKELY TO FORM ESPECIALLY IN PLACES WHERE IT RAINS THIS
EVENING. FOG IS ALSO POSSIBLE...HAVE CONTINUED MVFR AT EKN. THE COLD
FRONT WILL MOVE THROUGH AND OUT OF THE REGION ON SUNDAY
POSSIBLY KEEPING PRECIPITATION IN THE MOUNTAINS FOR A LITTLE
LONGER. MORNING LOW STRATUS IS LIKELY TO AFFECT MOUNTAINS SUNDAY
MORNING BUT...BY MIDDAY...VFR CONDITIONS WILL PREVAIL WITH HIGH
PRESSURE MOVING IN.

AVIATION OUTLOOK /BEYOND 00Z SUNDAY/...
NO SIGNIFICANT WX EXPECTED AT THIS TIME.

&&

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

&&

SYNOPSIS...TRM/SL/ESS/RPY
NEAR TERM...TRM
SHORT TERM...ESS
LONG TERM...SL
AVIATION...JS

Hazardous weather outlook, May 30, 8:41 PM EDT, 36 minutes before

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In the hours before

Local storm report, May 30, 8:01 PM EDT, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
801 PM EDT SAT MAY 30 2009

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

0748 PM     HAIL             KENOVA                  38.35N 82.56W
05/30/2009  E1.75 INCH       WAYNE              WV   PUBLIC

&&

NNNN

Local storm report, May 30, 8:02 PM EDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
802 PM EDT SAT MAY 30 2009

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

0756 PM     HAIL             2 S CEREDO              38.37N 82.55W
05/30/2009  E1.00 INCH       WAYNE              WV   COUNTY OFFICIAL

            AIRPORT OPERATIONS AT HUNTINGTON TRI-STATE AIRPORT
            REPORTS QUARTED SIZED HAIL.

&&

ABEAVERS

Local storm report, May 30, 8:16 PM EDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
816 PM EDT SAT MAY 30 2009

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

0757 PM     HAIL             LAVALETTE               38.31N 82.43W
05/30/2009  E1.00 INCH       WAYNE              WV   PUBLIC

&&

NNNN

Local storm report, May 30, 8:25 PM EDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
825 PM EDT SAT MAY 30 2009

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

0821 PM     FUNNEL CLOUD     EAST LYNN               38.19N 82.33W
05/30/2009                   WAYNE              WV   PUBLIC

&&

NNNN

Local storm report, May 30, 8:41 PM EDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
841 PM EDT SAT MAY 30 2009

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

0752 PM     TSTM WND DMG     KENOVA                  38.35N 82.56W
05/30/2009                   WAYNE              WV   PUBLIC

            LARGE BRANCHES BROKEN.

&&

NNNN

Local storm report, May 30, 9:16 PM EDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
916 PM EDT SAT MAY 30 2009

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

0840 PM     HAIL             MIDKIFF                 38.14N 82.13W
05/30/2009  U0.88 INCH       LINCOLN            WV   PUBLIC

&&

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 8:00 PM EDT	Severe Thunderstorm Warning	RLX	Mason	90 min
May 30, 8:07 PM EDT	Severe Thunderstorm Warning	RLX	Boone, Cabell, Lincoln, Logan, Wayne	83 min
May 30, 8:20 PM EDT	Tornado Warning	RLX	Cabell, Lincoln, Logan, Wayne	40 min
May 30, 9:56 PM EDT	Severe Thunderstorm Warning	RLX	Cabell, Kanawha, Lincoln, Putnam, Wayne	73 min
May 30, 10:36 PM EDT	Severe Thunderstorm Warning	RLX	Calhoun, Gilmer, Roane, Wirt	37 min
May 30, 10:51 PM EDT	Severe Thunderstorm Warning	RLX	Boone, Kanawha, Lincoln	84 min
May 30, 10:52 PM EDT	Severe Thunderstorm Warning	RLX	Doddridge, Pleasants, Ritchie, Tyler, Wirt, Wood	38 min
May 30, 11:26 PM EDT	Severe Thunderstorm Warning	RLX	Lincoln, Mingo, Wayne	94 min
May 30, 11:36 PM EDT	Severe Thunderstorm Warning	RLX	Doddridge, Harrison, Lewis, Ritchie	31 min
May 30, 11:43 PM EDT	Severe Thunderstorm Warning	RLX	Calhoun, Clay, Jackson, Roane	62 min
May 31, 12:00 AM EDT	Severe Thunderstorm Warning	RLX	Jackson, Roane, Wirt, Wood	32 min
May 31, 12:40 AM EDT	Severe Thunderstorm Warning	RLX	Braxton, Clay, Kanawha, Putnam, Roane	65 min
May 31, 1:16 AM EDT	Severe Thunderstorm Warning	RLX	Wayne	48 min
May 31, 1:19 AM EDT	Severe Thunderstorm Warning	RLX	Logan, Mingo	56 min
May 31, 1:35 AM EDT	Severe Thunderstorm Warning	RLX	Raleigh, Wyoming	55 min
May 31, 2:02 AM EDT	Severe Thunderstorm Warning	RLX	McDowell, Wyoming	43 min
May 31, 2:16 AM EDT	Severe Thunderstorm Warning	RLX	Logan, McDowell, Mingo, Wyoming	59 min
May 30, 10:03 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Jackson, Meigs, Vinton	43 min
May 30, 11:05 PM EDT	Severe Thunderstorm Warning	RLX	Gallia, Jackson, Meigs, Vinton	38 min

Nearby

Severe Thunderstorm Warnings in West Virginia, 2009 Severe Thunderstorm Warnings in Ohio, 2009 Severe Thunderstorm Warnings in Kentucky, 2009 Every severe thunderstorm warning in 2009

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.