Alert archive / Ohio / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 123, NWS Wilmington, OH

May 11, 20114 counties in Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at May 11, 2011, 2:44 AM EDT for 4 counties in Ohio. It was in force for 46 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 11, 2011, 2:44 AM EDT (06:44 UTC)
Expired: May 11, 2011, 3:30 AM EDT
In force: 46 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon

Counties Clinton County, OH, Fayette County, OH, Greene County, OH, Highland County, OH

The radar

The Cincinnati radar (KILN), 12 km from the middle of the area, began a volume at 06:44 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 11, 1:01 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.7 hours before the alert went out and 10 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: 1068 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 2337 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 May 11, 1:56 AM EDT, 48 minutes earlier.

Area forecast discussion, May 11, 1:56 AM EDT, 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
156 AM EDT WED MAY 11 2011

.SYNOPSIS...
A MID LVL RIDGE AXIS LOCATED FROM THE WESTERN GREAT LAKES
SOUTHWARD TO THE LOWER MISSISSIPPI VALLEY WILL MOVE SLOWLY
EAST ACROSS THE FORECAST AREA THROUGH THE END OF THE WORK WEEK.
MEANWHILE...A WARM FRONTAL BOUNDARY WILL REMAIN ACROSS THE
REGION...EVENTUALLY WASHING OUT BY THE END OF THE WORK WEEK.
SUMMER-LIKE TEMPERATURES CAN BE EXPECTED DURING THIS PERIOD.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
A SLOW MOVING MOISTURE BOUNDARY IS ORIENTED NW TO SE ACROSS THE
OHIO VALLEY BETWEEN DAYTON AND COLUMBUS TONIGHT. THIS BOUNDARY
WILL COMBINE WITH AMPLE INSTABILITY TO ALLOW THUNDERSTORMS TO
TRIGGER THROUGHOUT THE LATE EVENING HOURS. ONCE ENOUGH DIURNAL
COOLING OCCURS LATER TONIGHT...EXPECT THE ACTIVITY TO DIMINISH
INTO THE MORNING. PATCHY FOG ALREADY DEVELOPING WILL CONTINUE TO
DEVELOP THROUGHOUT THE NIGHTTIME...ESPECIALLY IN AREAS THAT
RECEIVED RAINFALL TODAY.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH FRIDAY/...
A SUMMER-LIKE PATTERN IS IN THE OFFING DURING THE SHORT TERM PERIOD.

A MID LVL RIDGE AXIS WILL SLOWLY MOVE EAST ACRS THE FORECAST AREA
THROUGH THE PERIOD. HOWEVER...THE RIDGE WILL NOT BRING COMPLETE
DRY WEATHER AS A WARM AND HUMID AIRMASS WILL BE IN PLACE.
THIS...ALONG WITH WEAK LOW LEVEL FORCING AND WEAK WX DISTURBANCES
ROTATING THROUGH THE UPPER LEVEL FLOW...WILL RESULT IN CHANCES OF
SHOWERS AND THUNDERSTORMS. THE BEST CHANCES WILL LIKELY OCCUR DURING
THE PEAK HEATING OF THE DAY INTO THE EVENING HOURS. HIGHS IN THE
LOWER AND MID 80S AND LOWS IN THE LOWER AND MID 60S ARE EXPECTED
WEDNESDAY AND THURSDAY. ON FRIDAY...MORE CLOUD COVER A LITTLE
HIGHER CHC FOR PCPN WILL TEMPER HIGHS DOWN INTO THE UPPER 70S TO THE
LOWER 80S.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
A HIGHLY AMPLIFIED UPPER LEVEL FLOW PATTERN IS ANTICIPATED DURING
THE LONG TERM PERIOD. IN FACT...THE FLOW WILL BECOME BLOCKY IN
NATURE AND WILL RESULT IN LARGE SYNOPTIC SCALE SYSTEMS TO MOVE
MORE NORTH TO SOUTH THAN WEST TO EAST. HAVE USED A BLEND OF THE
NCEP/HPC GUIDANCE AND THE 00Z ECMWF TO KEEP SOME CONTINUITY TO THE
FORECAST AS WELL AS TO BETTER COLLABORATE WITH SURROUNDING
OFFICES.

AN UPR LEVEL CLOSED LOW IS FORECAST TO MOVE SLOWLY SOUTHWARD FROM
THE MID MS RIVER VALLEY INTO THE LOWER GULF COAST STATES FROM
SATURDAY INTO MONDAY. AS THIS OCCURS...A COLD FRONT WILL SLIDE
FROM NORTH TO SOUTH ACRS THE AREA FRIDAY NIGHT INTO SATURDAY.
A MOISTURE FETCH OFF THE ATLANTIC WILL BE PULLED BACK WEST INTO
THE REGION...RESULTING IN THE THREAT FOR PCPN. HAVE KEPT BOTH A
CHANCE OF SHOWERS AND THUNDERSTORMS GOING SATURDAY INTO SATURDAY
NIGHT...TRANSITIONING OVER TO A CHANCE OF SHOWERS ON SUNDAY AS
INSTBY DECREASES WITH A COOLER AIRMASS. MODEL TRENDS INDICATE THAT
THE THREAT OF PCPN WILL BE SLOW TO EXIT THE REGION SUNDAY NIGHT
INTO MONDAY GIVEN THE SLOW MOVEMENT OF SYNOPTIC SYSTEMS. SFC HIGH
PRESSURE IS POISED AT THIS TIME TO BUILD INTO THE REGION MONDAY
NIGHT INTO TUESDAY WHICH SHOULD ALLOW THE REGION TO DRY OUT BY
THEN. TEMPERATURES THROUGH THE PERIOD WILL SHOW A COOLING TREND
GIVEN CLOUDS...PCPN AND A NORTHEAST SFC WIND FLOW. COULD EVEN BE
COOLER THAN CURRENTLY FORECAST...BUT WILL NOT GO THAT EXTREME AT
THIS TIME.

&&

.AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
LINE OF CONVECTION IS RUNNING BETWEEN TAFS ATTM. CONVECTION N OF
ILN IS SAGGING S AND MAY CLIP ILN OVER THE NEXT COUPLE OF HOURS.
KEPT ILN AS VCTS RIGHT NOW...BUT DID BRING AN ELY GUST IN BETWEEN
7-9Z.

CLOUDS SHOULD HELP MITIGATE FOG...BUT BUT IN MVFR FOG AT ALL LOCATIONS.

H5 RIDGE REBUILDS AFT 12Z. LOOKS LIKE CLOUDS WILL SCT OUT. WENT
DRY WITH THE TAFS.

ANOTHER S/W TOPS THE RIDGE AFT 00Z TONIGHT...SO ADDED VCTS TO THE
TAFS.

OUTLOOK...THUNDERSTORMS ARE POSSIBLE THURSDAY THROUGH SUNDAY.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...NONE.
KY...NONE.
IN...NONE.

&&

SYNOPSIS...HICKMAN
NEAR TERM...LATTO
SHORT TERM...HICKMAN
LONG TERM...HICKMAN
AVIATION...SITES

Hazardous weather outlook, May 10, 8:31 PM EDT, 6 hours 13 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WILMINGTON OH
831 PM EDT TUE MAY 10 2011

INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-
051>056-060>065-070>074-077>082-088-120045-
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-
831 PM EDT TUE MAY 10 2011

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...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, May 11, 2:09 AM EDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
209 AM EDT WED MAY 11 2011

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

1228 AM     HAIL             BLUE CREEK              38.78N 83.33W
05/11/2011  E1.75 INCH       ADAMS              OH   PUBLIC

&&

HATZOS

Local storm report, May 11, 2:11 AM EDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
211 AM EDT WED MAY 11 2011

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

0100 AM     HAIL             GARRISON                38.61N 83.17W
05/11/2011  E1.00 INCH       LEWIS              KY   PUBLIC

&&

HATZOS

Local storm report, May 11, 2:15 AM EDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
215 AM EDT WED MAY 11 2011

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

0140 AM     HAIL             5 WNW SOUTH CHARLESTON  39.84N 83.73W
05/11/2011  E1.75 INCH       CLARK              OH   PUBLIC

&&

HATZOS

Local storm report, May 11, 2:20 AM EDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
220 AM EDT WED MAY 11 2011

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

1248 AM     HAIL             SOUTH CHARLESTON        39.82N 83.64W
05/11/2011  E1.25 INCH       CLARK              OH   PUBLIC

&&

HATZOS

Local storm report, May 11, 2:24 AM EDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
224 AM EDT WED MAY 11 2011

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

0100 AM     HAIL             POWHATTAN               40.04N 83.69W
05/11/2011  E0.75 INCH       CHAMPAIGN          OH   PUBLIC

&&

HATZOS

Local storm report, May 11, 2:37 AM EDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
237 AM EDT WED MAY 11 2011

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

0159 AM     FLASH FLOOD      4 E SPRINGFIELD         39.93N 83.72W
05/11/2011                   CLARK              OH   UNKNOWN

            RED CROSS HAM OPERATOR...REPORTS OF SEVERAL LOCATIONS
            COVERED WITH A FOOT OF MOVING WATER NEAR OLD COLUMBUS
            ROAD AND SR 54.

&&

ASL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:20 PM EDT	Special Weather Statement	ILN	Fayette, Pickaway, Ross	25 min
May 10, 9:25 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Pickaway, Ross	50 min
May 10, 9:54 PM EDT	Special Weather Statement	ILN	Hocking	36 min
May 10, 10:09 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Highland, Pike, Ross	51 min
May 10, 10:20 PM EDT	Special Weather Statement	ILN	Madison	25 min
May 10, 10:44 PM EDT	Flash Flood Warning	ILN	Fayette, Pickaway, Ross	3 hr
May 10, 11:00 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Pickaway, Pike, Ross, Scioto	45 min
May 10, 11:05 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Madison	40 min
May 10, 11:30 PM EDT	Flash Flood Warning	ILN	Pike, Ross	5 hr
May 10, 11:34 PM EDT	Severe Thunderstorm Warning	ILN	Adams, Pike, Scioto	41 min
May 10, 11:43 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Highland, Ross	47 min
May 10, 11:54 PM EDT	Special Weather Statement	ILN	Madison	36 min
May 11, 12:09 AM EDT	Areal Flood Advisory	ILN	Pike, Scioto	3 hr
May 11, 12:14 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Scioto	46 min
May 11, 12:26 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Fayette, Madison	49 min
May 11, 12:47 AM EDT	Special Weather Statement	ILN	Logan	28 min
May 11, 12:53 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Scioto	53 min
May 11, 1:05 AM EDT	Special Weather Statement	ILN	Auglaize, Hardin	40 min
May 11, 1:14 AM EDT	Severe Thunderstorm Warning	ILN	Clinton, Fayette, Highland, Madison, Ross	46 min
May 11, 1:19 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Greene, Logan, Madison	41 min
May 11, 1:27 AM EDT	Flash Flood Warning	ILN	Champaign, Clark, Fayette, Madison, Ross	4 hr
May 11, 1:37 AM EDT	Special Weather Statement	ILN	Scioto	23 min
May 11, 1:58 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Fayette, Greene, Madison	47 min
May 11, 1:59 AM EDT	Special Weather Statement	ILN	Fayette	31 min
May 11, 2:17 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Miami, Shelby	43 min
May 11, 2:25 AM EDT	River Flood Warning	ILN	Pike, Scioto	39 hr
May 11, 2:25 AM EDT	River Flood Warning	ILN	Ross	6 hr
May 11, 2:59 AM EDT	Special Weather Statement	ILN	Champaign, Clark, Greene	46 min
May 11, 3:24 AM EDT	Flash Flood Warning	ILN	Logan	3 hr
May 11, 3:26 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Logan	49 min
May 11, 3:53 AM EDT	Areal Flood Warning	ILN	Pike, Ross	6 hr
May 11, 3:59 AM EDT	Areal Flood Advisory	ILN	Adams, Scioto	3 hr
May 11, 4:03 AM EDT	Special Weather Statement	ILN	Hardin	27 min
May 11, 4:31 AM EDT	Areal Flood Advisory	ILN	Auglaize, Hardin	3 hr
May 11, 4:55 AM EDT	Special Weather Statement	ILN	Hardin	35 min
May 11, 5:02 AM EDT	Flash Flood Warning	ILN	Hardin	101 min
May 11, 5:22 AM EDT	Areal Flood Warning	ILN	Champaign, Clark, Fayette, Madison	9 hr
May 11, 5:51 AM EDT	Areal Flood Warning	ILN	Logan	4 hr
May 11, 9:48 AM EDT	Areal Flood Warning	ILN	Logan	4 hr
May 11, 9:52 AM EDT	Areal Flood Warning	ILN	Pike, Ross	4 hr
May 11, 1:47 PM EDT	Areal Flood Warning	ILN	Logan	4 hr
May 11, 1:51 PM EDT	Areal Flood Warning	ILN	Ross	4 hr
May 10, 9:58 PM EDT	Special Weather Statement	ILN	Greenup	17 min
May 10, 11:24 PM EDT	Special Weather Statement	ILN	Greenup	21 min
May 11, 2:03 AM EDT	Special Weather Statement	ILN	Lewis	27 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2011 Every severe thunderstorm warning in 2011

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.