Alert archive / Ohio / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 99, NWS Wilmington, OH

May 29, 1998Clark County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at May 29, 1998, 6:38 PM EDT for Clark County, Ohio. It was in force for 47 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 29, 1998, 6:38 PM EDT (22:38 UTC)
Expired: May 29, 1998, 7:25 PM EDT
In force: 47 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Clark County, OH

The radar

The Cincinnati radar (KILN), 55 km from the middle of the area, began a volume at 22:39 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
May 29, 7:00 PM EDT	Thunderstorm Wind 50	Tremont City, OH	Trees downed.

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
May 29, 3:30 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.6 hours before the alert went out and 54 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: 410 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1085 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 29, 2:55 PM EDT, 3 hours 43 minutes earlier.

Area forecast discussion, May 29, 2:55 PM EDT, 3 hours 43 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
255 PM EDT FRI MAY 29 1998

MAIN COLD FRNT STILL WELL N OF REGION ACRS N LWR MI THRU CNTL LAKE
MI/CNTL WI...WL PUSH INTO CWA IN WEAKENED STATE LATER TONITE AND SHUD
STALL OUT SOMEWHERE N OF OH RVR. WITHIN CWA...DWPT BOUNDARY PUSHING
TWD S THRU NW COUNTIES...SCT TSTMS NOW DEVELOPING ALONG THIS BOUNDARY.
FARTHER S...ISOLD SHRA/TSRA HAVE BEEN DEVELOPING/DISSIPATING ALONG OLD
OUTFLW BOUNDARY INVOF RICH-DAY-CMH. THESE BOUNDARIES SHUD REMAIN FOCUS
FOR TSTM DEVELOPMNT WELL INTO THIS EVE...AND NEW OUTFLW BOUNDARIES WILL
COMPLICATE THIS SIMPLIFIED SCENARIO. MEANWHILE...TSTMS SHUD GRADUALLY
DIMINISH AFTER DARK...BUT MAIN COLD FRNT MAY PRODUCE A FEW ADDL
SHRA/TSRA...ESP N OF OH RVR...AS IT PUSHES INTO REGION LATER TONITE.
SUGGEST POPS AT LEAST THRU THIS EVE...GRADUATED FROM ABT 50% CNTL/N
SECTIONS (WITH MENTION OF SVR) TO 20-30% FAR S.

SAT...XPCT ANOTHER VERY WARM AND HUMID DAY. SFC BNDRY WL REMAIN NEARLY
STATIONARY ACRS CWA AND WL PROVIDE ANOTHER CHC FOR SCT TSRA...ESP PM
AND ESP N OF OH RVR.

SAT NITE...SFC LO OVR N PLAINS WL INTENSIFY AND HEAD INTO N GREAT
LAKES. AS A RESULT...SW FLW/WAA WL INTENSIFY ACRS CWA...AND SFC
BOUNDARY WL HEAD N AS WARM FRNT. MDS SUGGEST MCS WL DEVELOP N OF WARM
FRNT AND PROGGED TO PASS JUST N OF CWA. HOWEVER...ETA GRIDDED/GARP
DATA SUGGESTS OUTFLW FROM MCS WL INTERACT WITH WAA TO PRODUCE NEW TSTMS
INVOF N/W SECTIONS TWD SUN AM.

SUN...STRONG COLD FRNT WL APPROACH REGION FROM NW...AND WARMEST AIRMASS
SO FAR THIS SEASON WL FLOOD INTO CWA ON STRONG SW WINDS. ODDS ARE COLD
FRNT WL REMAIN NW OF CWA THRU DAY...BUT CONDITIONS WILL BECOME
FAVORABLE FOR TSTMS DURG PM...SOME LIKELY SEVER...AND PREFER LIKELY
POPS PER AVN MOS.

CVG 64/88/70/92 3326
DAY 64/86/68/92 4436
CMH 62/87/68/92 4426
PRT 61/89/68/94 2326

ROWLEY

In the hours before

Local storm report, May 29, 5:49 PM EDT, 49 minutes before

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Local storm report, May 29, 6:08 PM EDT, 30 minutes before

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Local storm report, May 29, 6:08 PM EDT, 30 minutes before

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Local storm report, May 29, 6:22 PM EDT, 16 minutes before

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Local storm report, May 29, 6:33 PM EDT, 5 minutes before

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Local storm report, May 29, 6:33 PM EDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 3:54 PM EDT	Severe Thunderstorm Warning	ILN	Logan	46 min
May 29, 4:27 PM EDT	Severe Thunderstorm Warning	ILN	Union	58 min
May 29, 5:11 PM EDT	Severe Thunderstorm Warning	ILN	Delaware	54 min
May 29, 5:13 PM EDT	Severe Thunderstorm Warning	ILN	Franklin	47 min
May 29, 5:21 PM EDT	Severe Thunderstorm Warning	ILN	Miami	49 min
May 29, 5:24 PM EDT	Severe Thunderstorm Warning	ILN	Darke	16 min
May 29, 5:35 PM EDT	Severe Thunderstorm Warning	ILN	Licking	65 min
May 29, 6:11 PM EDT	Severe Thunderstorm Warning	ILN	Miami	44 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1998 Every severe thunderstorm warning in 1998

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.