Alert archive / Ohio / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 31, NWS Wilmington, OH

April 30, 2003Mercer County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Apr 30, 2003, 4:38 PM EDT for Mercer County, Ohio. It was in force for 52 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: Apr 30, 2003, 4:38 PM EDT (20:38 UTC)
Expired: Apr 30, 2003, 5:30 PM EDT
In force: 52 min
Issued by: NWS Wilmington, OH
Area: Counties, with a storm outline in the text

County Mercer County, OH

The radar

The Northern Indiana radar (KIWX), 129 km from the middle of the area, began a volume at 20:41 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.6 hours before the alert went out and 140 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: 29 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1151 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 130 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.

000 
WUUS51 KILN 302038
SVRILN
OHC107-302130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
438 PM EDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MERCER COUNTY IN OHIO...

* UNTIL 530 PM EDT...

* AT 438 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM 3 MILES WEST OF COLDWATER...MOVING NORTHEAST 
  AT 25 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  CELINA...
  COLDWATER...
  FORT RECOVERY...
  ST. HENRY...

LARGE HAIL IS LIKELY WITH THIS STORM. IF YOU ARE IN THE STORMS
PATH...TAKE COVER IN A STURDY STRUCTURE UNTIL THE STORM PASSES.

LAT...LON 4040 8481 4040 8457 4058 8457 4058 8481

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 Apr 30, 3:56 PM EDT, 42 minutes earlier.

Area forecast discussion, Apr 30, 3:56 PM EDT, 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
356 PM EDT WED APR 30 2003

VORT MAX LIFTING NORTHEAST THROUGH THE FA IS DRIVING THE
CONVECTION.  BASED ON WHERE THE ECHOS ARE AT PRESS TIME IS WHERE I
WILL HAVE THEM MENTIONED FOR THIS EVENING.

NO REAL UPPER SUPPORT OVERNIGHT...SO WILL KEEP IT DRY.  COLD FRONT
PUSHES INTO EXTREME NORTHWEST OH BY 00Z THU.  LI AHEAD OF THE FRONT
IN THE WARM SECTOR DROPS TO -2 TO -3.  CHANCE DURING THE AFTERNOON
LOOKS GOOD.  FRONT PUSHES INTO THE FA THU NGT.  UPPER SUPPORT IS
LACKING...WITH VERY LITTLE 500 MB DIFLUENCE.  ALSO RIGHT REAR QUAD
OF 300MB JET IS UP IN SRN CANADA.  WILL KEEP LIKELY POPS IN THE
NORTH...BUT ONLY CHANCE IN THE SOUTH THU NGT.

FRONT IS SOUTH AND EAST OF FA BY 12Z FRIDAY...BUT LOW PRESSURE WAVE
RIDES ALONG THE FRONT AND PUSHES BACK NORTH.  WILL CARRY THUNDER
ACROSS THE SOUTH.

MADE VERY FEW CHANGES TO THE TEMPS.

CLEMISILN OUT SHORTLY.

ILN...NONE.

SITES

Hazardous weather outlook, Apr 30, 5:07 AM EDT, 11 hours 31 minutes before

INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-
051>056-060>065-070>074-077>082-088-301100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WILMINGTON OH
507 AM EDT WED APR 30 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN INDIANA...NORTHERN
KENTUCKY AND THE SOUTHWEST QUARTER OF OHIO.

.DAY ONE...TODAY

A WARM FRONT WILL MOVE NORTH ACROSS THE REGION TODAY.  DAYTIME
HEATING WILL CAUSE THE ATMOSPHERE TO DESTABILIZE...AND THUNDERSTORMS
ARE EXPCTED TO DEVELOP THIS AFTERNOON.  SOME OF THE STORMS MAY BE
STRONG TO SEVERE...WITH LARGE HAIL THE MAIN THREAT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY

AFTER BRIEFLY LIFTING NORTH INTO LOWER MICHIGAN TONIGHT...THE
FRONTAL BOUNDARY WILL DROP BACK TO THE SOUTH ON THURSDAY.  SHOWERS
AND THUNDERSTORMS WILL REDEVELOP THURSDAY AFTERNOON AND CONTINUE
THROUGH FRIDAY AS THE FRONT SLOWLY SAGS ACROSS THE REGION.  THE
POTENTIAL FOR SEVERE THUNDERSTORMS WILL EXIST THROUGH FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

RYAN

In the hours before

Local storm report, Apr 30, 4:09 PM EDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, OH
409 PM EDT WED APR 30 2003

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    MINSTER                   OH   1.50 INCH HAIL
04/30/03   AUGLAIZE

0404 PM    CIRCLEVILLE               OH   .75 INCH HAIL
04/30/03   PICKAWAY

Local storm report, Apr 30, 4:31 PM EDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, OH
431 PM EDT WED APR 30 2003

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 PM    MCCARTYVILLE              OH   1.00 INCH HAIL
04/30/03   SHELBY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 2:54 PM EDT	Severe Thunderstorm Warning	ILN	Fayette	51 min
Apr 30, 3:08 PM EDT	Severe Thunderstorm Warning	ILN	Pickaway	37 min
Apr 30, 3:33 PM EDT	Severe Thunderstorm Warning	ILN	Mercer	42 min
Apr 30, 3:43 PM EDT	Severe Thunderstorm Warning	ILN	Franklin	47 min
Apr 30, 3:50 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Shelby	40 min
Apr 30, 4:06 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Pickaway	39 min
Apr 30, 5:16 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize	44 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2003 Every severe thunderstorm warning in 2003

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.