Alert archive / Ohio / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 54, NWS Wilmington, OH

May 18, 1997Delaware County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at May 18, 1997, 5:11 AM EDT for Delaware County, Ohio. It was in force for 44 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: May 18, 1997, 5:11 AM EDT (09:11 UTC)
Expired: May 18, 1997, 5:55 AM EDT
In force: 44 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Delaware County, OH

What was reported inside it

Time	Report	Where	Remark
May 18, 5:15 AM EDT	Hail 0.75	Lewis Center, 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.2 hours before the alert went out and 116 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: 26 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1806 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 18, 2:48 AM EDT, 2 hours 23 minutes earlier.

Area forecast discussion, May 18, 2:48 AM EDT, 2 hours 23 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
245 AM EDT SUN MAY 18 1997

MID SFC ANLYS SHWG WRM FNT JUST N OF CMH/DAY...FNT FCST TO MV NORTH TDY
AS PLAINS LO APPCHS.

TOUGH FCST W/O PCGRIDDS DATA. ANYHOW RDG PASSES THRU REGION TDY W/
TEMPS FINALLY REACHING 80 IN THE METRO AREAS. W/ THE HEAT ALSO COMES
INSTABILITY. GARP ETA DATA INDICATING CAPES SHUD RECH 1500 DURING THE
AFTERNOON AND CLOSER TO 1000 BY EVE. S/W MVNG THRU RDG ADDS SM LIFT TNT
PASSING THRU BY 00Z. JET DYNAMICS NOT CONDUCIVE TO LIKELY POPS OR
WIDESPREAD OUTBREAK...BUT INSTAB ENUF FOR CHC POPS OVER METRO AREAS AND
LIKELY IN THE NORTHERN PART OF CWA. 50-60KT 850 JET PASSES FROM INDIANA
INTO NRN OH BETWEEN AFTERNOON AND MIDNITE BUT NO REAL GOOD UPPER DVRG.
VERY GOOD SHEAR SHUD LEAD TO HI HELICITY THIS AFTERNOON DECREASING SOME
BY EVENING. STRG S/W FLO SHUD LEAD TO TEMPS NEAR MOS #/S.

EVEN AS VORT LOBE SWINGS OUT OF REGION OVRNITE...INSTAB REMAINS AND
APPCH OF RR QUAD OF UPR JET MVNG INTO GRT LKS SHUD GIVE ENUF LIFT FOR
LIKELY RW/TRW. TEMPS SHUD NOT DROP MUCH IN STRG SW FLO.

POSS OF MCS DVLPMENT ALG WRM FNT IN MI TNT...SHUD DROP SE AS PER FCSTD
THCK EAST OF OUR REGION. THIS CUD ROB SOME OF THE MOIST FROM OUR
REGION...BUT WE'LL SEE.

MONDAY...INSTAB REMAINS OVER REGION W/ CAPES ARND 1200 AND LI/S OF -2.
SLOWING CD FNT DRAGGING ACRS REGION SHUD LEAD TO LIKELY RW/TRW ONCE
AGAIN. NGM/ETA HAV FNT FROM SC OH INTO KY BY 00Z TUES W/ ETA JUST A BIT
SLOWER. FNT SHUD SLOW UP AS MVS INTO PARRALEL FLO REACHING CVG/CMH ARND
20Z. FNT SHUD MV LIMA IN THE AM. MAY WANT TO GO W/ RW/TRW LIKELY MAINLY
IN THE MORNING FOR THE LIMA AREA...REST OF REGION CAN PROB JUST GO
RW/TRW LIKELY.

SELS JUST PUT OUR REGION IN DAY 1 MODERATE AREA...WILL ISSUE SPS FOR
SEVERE POTENTIAL LATER THIS MORNING.

CVG 84/65/80 378
DAY 83/65/78 487
CMH 83/65/80 487

FARINA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 3:12 AM EDT	Severe Thunderstorm Warning	ILN	Auglaize	43 min
May 18, 4:13 AM EDT	Severe Thunderstorm Warning	ILN	Delaware	42 min
May 18, 2:23 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize	37 min
May 18, 2:46 PM EDT	Severe Thunderstorm Warning	ILN	Allen, Hardin	29 min
May 18, 4:19 PM EDT	Severe Thunderstorm Warning	ILN	Allen	41 min
May 18, 5:00 PM EDT	Severe Thunderstorm Warning	ILN	Clark	30 min
May 18, 5:18 PM EDT	Severe Thunderstorm Warning	ILN	Champaign	27 min
May 18, 5:32 PM EDT	Severe Thunderstorm Warning	ILN	Madison, Union	28 min
May 18, 5:44 PM EDT	Severe Thunderstorm Warning	ILN	Delaware	46 min
May 18, 6:07 PM EDT	Severe Thunderstorm Warning	ILN	Franklin	38 min
May 18, 6:26 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Licking	34 min
May 18, 6:31 PM EDT	Severe Thunderstorm Warning	ILN	Scioto	44 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1997 Every severe thunderstorm warning in 1997

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.