Alert archive / Ohio / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 70, NWS Wilmington, OH

April 9, 2001Highland County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Apr 9, 2001, 11:39 PM EDT for Highland County, Ohio. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 9, 2001, 11:39 PM EDT (03:39 UTC)
Expired: Apr 10, 2001, 12:30 AM EDT
In force: 51 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Highland County, OH

The radar

The Cincinnati radar (KILN), 32 km from the middle of the area, began a volume at 03:39 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.

What was reported inside it

Time	Report	Where	Remark
Apr 9, 11:50 PM EDT	Hail 1.75	Hillsboro, OH

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 9, 7:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.7 hours before the alert went out and 32 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: 1457 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1624 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KILN 100340
SVRILN
OHC071-100430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1139 PM EDT MON APR 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 1230 AM EDT...

* AT 1139 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES WEST OF LEESBURG...OR ABOUT 9 MILES
  NORTH OF HILLSBORO...MOVING SOUTHEAST AT 40 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  MARSHALL...
  LEESBURG...
  HILLSBORO...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL.

$$
SEW

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 9, 11:25 PM EDT, 14 minutes earlier.

Area forecast discussion, Apr 9, 11:25 PM EDT, 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
1125 PM EDT MON APR 9 2001

WILL MAKE SOME COSMETIC CHANGES TO FCST IN TERMS OF COOLER TEMPS
NORTH OF FRONTAL BOUNDARY WHICH IS DRAPED ACRS THE NRN CWFA.  WILL
LOWER POPS TO ABOUT 40 NORTHWEST CWFA.  CLUSTER OF STORMS DEVELOPING
IN W CNTRL INDIANA WILL LIKEKLY PROPAGATE TO THE ESE INTO THIS
REGION.  WILL ALSO CONTINUE WATCH UNTIL 1 AM EDT (MIDNIGHT EST).

.ILN...NONE.

HICKMAN

In the hours before

Local storm report, Apr 9, 5:51 PM EDT, 5 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, OH
551 PM EDT MON APR 9 2001

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

0542 PM    LONDON                    OH   .75 INCH HAIL
04/09/01   MADISON

0520 PM    SPRINGFIELD               OH   .75 INCH HAIL
04/09/01   CLARK

0515 PM    5 S GALENA                OH   .88 INCH HAIL
04/09/01   DELAWARE

0520 PM    UTICA                     OH   1.00 INCH HAIL
04/09/01   LICKING

JSS

Local storm report, Apr 9, 6:03 PM EDT, 5 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, OH
603 PM EDT MON APR 9 2001

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

0555 PM    2 SW LONDON               OH   1.50 INCH HAIL
04/09/01   MADISON                        ONE INCH TO ONE HALF INCH
                                          HAIL.

JSS

Local storm report, Apr 9, 6:32 PM EDT, 5 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, OH
632 PM EDT MON APR 9 2001

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

0631 PM    HUBER HEIGHTS             OH   1.00 INCH HAIL
04/09/01   MONTGOMERY

JSS

Local storm report, Apr 9, 6:39 PM EDT, 5 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, OH
639 PM EDT MON APR 9 2001

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

0638 PM    OXFORD                    OH   1.50 INCH HAIL
04/09/01   BUTLER

JSS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 8:00 PM EDT	Severe Thunderstorm Warning	ILN	Madison	45 min
Apr 9, 8:02 PM EDT	Severe Thunderstorm Warning	ILN	Clinton	43 min
Apr 9, 8:15 PM EDT	Severe Thunderstorm Warning	ILN	Warren	30 min
Apr 9, 8:16 PM EDT	Severe Thunderstorm Warning	ILN	Franklin	59 min
Apr 9, 8:21 PM EDT	Severe Thunderstorm Warning	ILN	Ross	39 min
Apr 9, 8:26 PM EDT	Severe Thunderstorm Warning	ILN	Fayette	49 min
Apr 9, 8:37 PM EDT	Severe Thunderstorm Warning	ILN	Pickaway	43 min
Apr 9, 8:52 PM EDT	Severe Thunderstorm Warning	ILN	Highland	23 min
Apr 9, 8:52 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield	53 min
Apr 9, 8:55 PM EDT	Severe Thunderstorm Warning	ILN	Ross	65 min
Apr 9, 9:05 PM EDT	Severe Thunderstorm Warning	ILN	Montgomery	40 min
Apr 9, 9:17 PM EDT	Severe Thunderstorm Warning	ILN	Clark, Greene	58 min
Apr 9, 9:18 PM EDT	Severe Thunderstorm Warning	ILN	Darke	57 min
Apr 9, 9:21 PM EDT	Severe Thunderstorm Warning	ILN	Hocking	39 min
Apr 9, 9:24 PM EDT	Severe Thunderstorm Warning	ILN	Highland	51 min
Apr 9, 9:37 PM EDT	Severe Thunderstorm Warning	ILN	Pike	38 min
Apr 9, 9:42 PM EDT	Tornado Warning	ILN	Darke	48 min
Apr 9, 10:01 PM EDT	Tornado Warning	ILN	Miami	44 min
Apr 9, 10:04 PM EDT	Tornado Warning	ILN	Greene	26 min
Apr 9, 10:15 PM EDT	Severe Thunderstorm Warning	ILN	Fayette	45 min
Apr 9, 10:18 PM EDT	Severe Thunderstorm Warning	ILN	Montgomery	42 min
Apr 9, 10:28 PM EDT	Severe Thunderstorm Warning	ILN	Clark, Greene	62 min
Apr 9, 10:47 PM EDT	Severe Thunderstorm Warning	ILN	Pickaway	43 min
Apr 9, 10:52 PM EDT	Severe Thunderstorm Warning	ILN	Ross	38 min
Apr 9, 10:58 PM EDT	Severe Thunderstorm Warning	ILN	Fayette	47 min
Apr 9, 11:02 PM EDT	Severe Thunderstorm Warning	ILN	Madison	28 min
Apr 9, 11:24 PM EDT	Severe Thunderstorm Warning	ILN	Clinton	36 min
Apr 9, 11:28 PM EDT	Severe Thunderstorm Warning	ILN	Ross	32 min
Apr 9, 11:47 PM EDT	Severe Thunderstorm Warning	ILN	Ross	43 min
Apr 10, 12:25 AM EDT	Severe Thunderstorm Warning	ILN	Pike	35 min
Apr 10, 1:52 AM EDT	Severe Thunderstorm Warning	ILN	Shelby	38 min
Apr 10, 4:23 PM EDT	Severe Thunderstorm Warning	ILN	Hocking	37 min
Apr 10, 6:26 PM EDT	Severe Thunderstorm Warning	ILN	Montgomery	49 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.