Alert archive / Ohio / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 20, NWS Charleston, WV

May 12, 20104 counties in Ohio

NWS Charleston, WV issued this severe thunderstorm warning at May 12, 2010, 10:53 AM EDT for 4 counties in Ohio. It was in force for 40 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 12, 2010, 10:53 AM EDT (14:53 UTC)
Expired: May 12, 2010, 11:33 AM EDT
In force: 40 min
Issued by: NWS Charleston, WV
Area: Storm-based polygon

Counties Athens County, OH, Morgan County, OH, Perry County, OH, Washington County, OH

The radar

The Charleston,WV radar (KRLX), 137 km from the middle of the area, began a volume at 14:54 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 2.9 hours before the alert went out and 163 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: 274 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 485 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 12, 6:13 AM EDT, 4 hours 40 minutes earlier.

Area forecast discussion, May 12, 6:13 AM EDT, 4 hours 40 minutes before

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Hazardous weather outlook, May 12, 10:47 AM EDT, 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON WV
1047 AM EDT WED MAY 12 2010

OHZ066-067-075-076-VAZ003-004-WVZ009>011-019-020-024-025-031>034-040-
131500-
PERRY-MORGAN-ATHENS-WASHINGTON-DICKENSON-BUCHANAN-WOOD-PLEASANTS-
TYLER-RITCHIE-DODDRIDGE-MINGO-LOGAN-HARRISON-TAYLOR-MCDOWELL-WYOMING-
BARBOUR-
1047 AM EDT WED MAY 12 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...SOUTHWEST
VIRGINIA...PART OF NORTHERN WEST VIRGINIA...AND FAR SOUTHERN WEST
VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

LOCALLY HEAVY RAINFALL POSSIBLE IN THUNDERSTORMS THIS AFTERNOON.
NO FLOOD OR SEVERE THUNDERSTORM WATCHES OR WARNINGS ARE EXPECTED
AT THIS TIME...BUT AREA WILL BE MONITORED CLOSELY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

KYZ101>103-105-OHZ083>087-WVZ005>008-013>018-026>030-035>039-046-047-
131500-
GREENUP-CARTER-BOYD-LAWRENCE KY-JACKSON OH-VINTON-MEIGS-GALLIA-
LAWRENCE OH-WAYNE-CABELL-MASON-JACKSON WV-LINCOLN-PUTNAM-KANAWHA-
ROANE-WIRT-CALHOUN-BOONE-CLAY-BRAXTON-GILMER-LEWIS-RALEIGH-FAYETTE-
NICHOLAS-WEBSTER-UPSHUR-POCAHONTAS-RANDOLPH-
1047 AM EDT WED MAY 12 2010

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST
KENTUCKY...EXTREME SOUTHEAST OHIO AND CENTRAL WEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

THE AREA IS ALSO UNDER A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS
OHIO...NORTHEAST KENTUCKY AND NORTHERN WEST VIRGINIA
THURSDAY...MAINLY FOR THE AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, May 12, 10:48 AM EDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
1048 AM EDT WED MAY 12 2010

KYZ101>103-OHZ083>087-121545-
BOYD KY-CARTER KY-GALLIA OH-GREENUP KY-JACKSON OH-LAWRENCE OH-
MEIGS OH-VINTON OH-
1048 AM EDT WED MAY 12 2010

...STRONG THUNDERSTORMS WILL AFFECT BOYD...CARTER...GALLIA...
GREENUP...JACKSON...LAWRENCE...SOUTHERN VINTON AND WESTERN MEIGS
COUNTIES...

AT 1042 AM EDT...AN AREA OF STRONG THUNDERSTORMS WAS LOCATED OVER
WEST PORTSMOUTH...MOVING EAST AT 45 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
EXPECT INTENSE LIGHTNING FROM THESE STORMS.

DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.

THESE STORMS WILL BE NEAR GREENUP...NAPLES...COALTON...AND RUSH
AROUND 1055 AM...HANGING ROCK...WURTLAND...WORTHINGTON...AND
RACELAND AROUND 1100 AM...PETERSBURG AND IRONTON AROUND 1105 AM.

THIS WILL IMPACT

I-64 BETWEEN MILE MARKERS 155 AND 191 IN KENTUCKY.

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

08

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 9:32 AM EDT	Flash Flood Watch	RLX	Boone, Braxton, Cabell, Calhoun, Clay, Gilmer and 10 more	13 hr
May 12, 12:00 PM EDT	Flash Flood Warning	RLX	Cabell, Wayne	3 hr
May 12, 1:23 PM EDT	Flash Flood Warning	RLX	Pocahontas, Randolph, Webster	4 hr
May 12, 6:56 PM EDT	Flash Flood Warning	RLX	Kanawha, Putnam	85 min
May 12, 7:33 PM EDT	Flash Flood Warning	RLX	Boone, Kanawha	117 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2010 Every severe thunderstorm warning in 2010

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.