Alert archive / Ohio / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 175, NWS Wilmington, OH

August 4, 20094 counties in Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Aug 4, 2009, 6:28 AM EDT for 4 counties in Ohio. It was in force for 47 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: Aug 4, 2009, 6:28 AM EDT (10:28 UTC)
Expired: Aug 4, 2009, 7:15 AM EDT
In force: 47 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon

Counties Clinton County, OH, Fayette County, OH, Greene County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 12 km from the middle of the area, began a volume at 10:27 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 00:00Z, 10.5 hours before the alert went out and 11 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: 34 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1226 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Wilmington, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 4:37 AM EDT, 1 hour 51 minutes earlier.

Area forecast discussion, Aug 4, 4:37 AM EDT, 1 hour 51 minutes before

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Hazardous weather outlook, Aug 4, 4:58 AM EDT, 1 hour 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WILMINGTON OH
458 AM EDT TUE AUG 4 2009

INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-
051>056-060>065-070>074-077>082-088-050900-
WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO-
SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT-
PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-HARDIN-MERCER-AUGLAIZE-DARKE-
SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI-CHAMPAIGN-CLARK-MADISON-
FRANKLIN OH-LICKING-PREBLE-MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY-
FAIRFIELD-BUTLER-WARREN-CLINTON-ROSS-HOCKING-HAMILTON-CLERMONT-BROWN-
HIGHLAND-ADAMS-PIKE-SCIOTO-
458 AM EDT TUE AUG 4 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL
INDIANA...SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN
KENTUCKY...CENTRAL OHIO...MIAMI VALLEY OF OHIO...SOUTH CENTRAL
OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO.

.DAY ONE...TODAY AND TONIGHT.

SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS ARE POSSIBLE TODAY.
WITH A VERY HUMID AND UNSTABLE AIRMASS IN PLACE...SOME OF THESE
STORMS MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

In the hours before

Special weather statement, Aug 4, 4:02 AM EDT, 2 hours 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
402 AM EDT TUE AUG 4 2009

INZ050-040830-
WAYNE IN-
402 AM EDT TUE AUG 4 2009

...A STRONG THUNDERSTORM WILL AFFECT WAYNE COUNTY THROUGH 430 AM
EDT...

AT 401 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM LOCATED NEAR HAGERSTOWN...MOVING EAST AT 20 MPH.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.

LOCATIONS IMPACTED INCLUDE...
DUBLIN...CAMBRIDGE CITY...HAGERSTOWN...RICHMOND...FOUNTAIN CITY AND
CENTERVILLE.

IN ADDITION...MOUNT AUBURN...FRANKLIN...EAST GERMANTOWN...
JACKSONBURG...ECONOMY...GREENS FORK...RICHMOND MUNICIPAL AIRPORT AND
MIDDLEBORO ARE NEAR THE PATH OF THIS STORM.

FREQUENT CLOUD TO GROUND LIGHTNING WILL ALSO OCCUR. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

THIS STORM WILL ALSO BE CAPABLE OF PRODUCING VERY HEAVY RAIN...WHICH
MAY FLOOD ROADS...DITCHES AND LOW LYING AREAS. DO NOT DRIVE INTO
PLACES WHERE WATER COVERS THE ROAD AND AVOID FLOOD PRONE AREAS.

RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THIS STORM BECOMES
STRONGER...THEN A WARNING MAY BE NEEDED.

Local storm report, Aug 4, 4:36 AM EDT, 1 hour 52 minutes before

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Local storm report, Aug 4, 5:06 AM EDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
506 AM EDT TUE AUG 04 2009

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

0438 AM     HAIL             GREENS FORK             39.89N 85.04W
08/04/2009  E1.00 INCH       WAYNE              IN   TRAINED SPOTTER

            HAIL LASTED UP TO 5 MINUTES...SOMEWHAT COVERED THE GROUND

0504 AM     HAIL             RICHMOND                39.83N 84.89W
08/04/2009  E0.75 INCH       WAYNE              IN   TRAINED SPOTTER

            PENNY SIZE HAIL IN DOWNTOWN RICHMOND

&&

HAWBLITZEL

Local storm report, Aug 4, 5:17 AM EDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
517 AM EDT TUE AUG 04 2009

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

0510 AM     HAIL             3 E RICHMOND            39.83N 84.83W
08/04/2009  E1.00 INCH       WAYNE              IN   TRAINED SPOTTER

&&

HAWBLITZEL

Local storm report, Aug 4, 5:23 AM EDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
523 AM EDT TUE AUG 04 2009

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

0508 AM     HAIL             ENGLEWOOD               39.86N 84.31W
08/04/2009  E0.75 INCH       MONTGOMERY         OH   PUBLIC

&&

HAWBLITZEL

Special weather statement, Aug 4, 6:08 AM EDT, 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
608 AM EDT TUE AUG 4 2009

OHZ060-061-041045-
MONTGOMERY OH-PREBLE OH-
608 AM EDT TUE AUG 4 2009

...A STRONG THUNDERSTORM WILL AFFECT PREBLE AND MONTGOMERY COUNTIES
THROUGH 645 AM EDT...

AT 605 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LARGE AREA OF THUNDERSTORMS ACROSS EASTERN PREBLE AND WESTERN AND
SOUTHERN MONTGOMERY COUNTIES...MOVING SOUTHEAST AT 20 MPH.

THESE STORMS WILL BE CAPABLE OF PRODUCING HAIL UP TO ONE HALF INCH
IN DIAMETER.

LOCATIONS IMPACTED INCLUDE...
GRATIS...TROTWOOD...NORTHRIDGE...WEST CARROLLTON...MORAINE...
MIAMISBURG AND DAYTON.

IN ADDITION...BROOKVILLE...NEW LEBANON...FARMERSVILLE...FORT
MCKINLEY...SHILOH...DREXEL AND GERMANTOWN ARE NEAR THE PATH OF THESE
STORMS.

FREQUENT AND VERY DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO
OCCURRING. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES
LEADING KILLERS.

THESE STORMS WILL ALSO BE CAPABLE OF PRODUCING VERY HEAVY
RAIN...WHICH MAY FLOOD ROADS...DITCHES AND LOW LYING AREAS. DO NOT
DRIVE INTO PLACES WHERE WATER COVERS THE ROAD AND AVOID FLOOD PRONE
AREAS.

The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 4:44 AM EDT	Severe Thunderstorm Warning	ILN	Preble	61 min
Aug 4, 4:47 AM EDT	Severe Thunderstorm Warning	ILN	Miami, Montgomery, Preble	58 min
Aug 4, 5:16 AM EDT	Areal Flood Advisory	ILN	Preble	2 hr
Aug 4, 5:38 AM EDT	Severe Thunderstorm Warning	ILN	Greene, Montgomery	52 min
Aug 4, 6:15 AM EDT	Areal Flood Advisory	ILN	Montgomery, Preble	3 hr
Aug 4, 7:09 AM EDT	Areal Flood Advisory	ILN	Butler, Clinton, Montgomery, Preble, Warren	3 hr
Aug 4, 8:11 AM EDT	Flash Flood Warning	ILN	Warren	2 hr
Aug 4, 8:20 AM EDT	Areal Flood Advisory	ILN	Adams, Brown, Clermont, Clinton, Highland	3 hr
Aug 4, 8:42 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Scioto	19 min
Aug 4, 9:31 AM EDT	Severe Thunderstorm Warning	ILN	Butler	29 min
Aug 4, 9:49 AM EDT	Severe Thunderstorm Warning	ILN	Greene	26 min
Aug 4, 11:11 AM EDT	Flash Flood Watch	ILN	Adams, Brown, Butler, Clermont, Clinton, Fayette and 9 more	16 hr
Aug 4, 5:22 PM EDT	River Flood Advisory	ILN	Hamilton	36 hr
Aug 4, 9:06 AM EDT	Areal Flood Advisory	ILN	Lewis, Mason	3 hr
Aug 4, 11:55 AM EDT	Severe Thunderstorm Warning	ILN	Carroll, Gallatin, Owen	50 min
Aug 4, 12:37 PM EDT	Areal Flood Advisory	ILN	Carroll, Gallatin, Owen	3 hr
Aug 4, 1:36 PM EDT	Flash Flood Warning	ILN	Carroll, Gallatin, Owen	3 hr
Aug 4, 2:17 PM EDT	Flash Flood Warning	ILN	Grant, Owen	3 hr
Aug 4, 4:29 PM EDT	Areal Flood Warning	ILN	Carroll, Gallatin, Grant, Owen	4 hr
Aug 4, 4:06 AM EDT	Severe Thunderstorm Warning	ILN	Wayne	39 min
Aug 4, 6:15 AM EDT	Severe Thunderstorm Warning	ILN	Franklin	37 min
Aug 4, 8:38 AM EDT	Areal Flood Advisory	ILN	Ripley	3 hr
Aug 4, 9:17 AM EDT	Flash Flood Warning	ILN	Ripley	8 hr
Aug 4, 10:23 AM EDT	Areal Flood Advisory	ILN	Dearborn, Fayette, Franklin, Union	112 min
Aug 4, 10:39 AM EDT	Areal Flood Advisory	ILN	Dearborn, Fayette, Franklin, Union	96 min
Aug 4, 10:59 AM EDT	Flash Flood Warning	ILN	Franklin	6 hr
Aug 4, 1:20 PM EDT	Areal Flood Advisory	ILN	Fayette, Union, Wayne	3 hr
Aug 4, 4:58 PM EDT	Areal Flood Warning	ILN	Franklin, Ripley	6 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 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.