Alert archive / Ohio / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 21, NWS Wilmington, OH

April 20, 2000Hamilton County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Apr 20, 2000, 6:18 PM EDT for Hamilton County, Ohio. It was in force for 62 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 20, 2000, 6:18 PM EDT (22:18 UTC)
Expired
Apr 20, 2000, 7:20 PM EDT
In force
62 min
Issued by
NWS Wilmington, OH
Area
Whole counties

County Hamilton County, OH

The radar

The Cincinnati radar (KILN), 67 km from the middle of the area, began a volume at 22:12 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

TimeReportWhereRemark
Apr 20, 6:25 PM EDTThunderstorm Wind 50 ECincinnati, OHTrees and power lines downed. One tree fell across a car.

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.

IssuedProductOfficeLasted
Apr 20, 3:15 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.3 hours before the alert went out and 69 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2000-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2000-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1769 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
167 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 202218
SVRILN
INC115-KYC015-OHC061-202320-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
618 PM EDT THU APR 20 2000

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HAMILTON COUNTY IN SOUTHWESTERN OHIO.
  BOONE COUNTY IN NORTHERN KENTUCKY.
  OHIO COUNTY IN SOUTHEASTERN INDIANA.

* UNTIL 720 PM EDT

* AT 615 PM EDT (515 PM EST)...NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM WESTERN
  HAMILTON COUNTY TO 10 MILES WEST OF RISING SUN. THIS LINE WAS
  MOVING EAST AT 30 MPH AND WILL TRACK ACROSS HAMILTON COUNTY...
  OHIO COUNTY AND BOONE COUNTY KENTUCKY THROUGH 720 PM EDT (620
  PM EST).

* THE LINE OF SEVERE THUNDERSTORMS WILL BE NEAR...
  RISING SUN  AROUND 630 PM EDT (530 EST)
  CINCINNATI  AROUND 645 PM EDT

  GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! 4A TORNADO
  WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
  PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

  .END/AR

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 20, 3:13 PM EDTSevere Thunderstorm WarningILNWarren47 min
Apr 20, 5:33 PM EDTSevere Thunderstorm WarningILNMercer47 min
Apr 20, 5:39 PM EDTSevere Thunderstorm WarningILNDarke, Preble46 min
Apr 20, 5:55 PM EDTSevere Thunderstorm WarningILNButler65 min
Apr 20, 6:11 PM EDTSevere Thunderstorm WarningILNMiami, Shelby44 min
Apr 20, 6:11 PM EDTSevere Thunderstorm WarningILNMontgomery44 min
Apr 20, 6:24 PM EDTTornado WarningILNMontgomery31 min
Apr 20, 6:38 PM EDTTornado WarningILNClark42 min
Apr 20, 6:42 PM EDTSevere Thunderstorm WarningILNWarren63 min
Apr 20, 6:51 PM EDTSevere Thunderstorm WarningILNChampaign49 min
Apr 20, 6:56 PM EDTSevere Thunderstorm WarningILNHardin34 min
Apr 20, 6:59 PM EDTSevere Thunderstorm WarningILNGreene46 min
Apr 20, 7:10 PM EDTSevere Thunderstorm WarningILNClinton60 min
Apr 20, 7:19 PM EDTSevere Thunderstorm WarningILNClermont46 min
Apr 20, 7:27 PM EDTSevere Thunderstorm WarningILNFayette, Madison63 min
Apr 20, 7:34 PM EDTSevere Thunderstorm WarningILNBrown61 min
Apr 20, 7:45 PM EDTSevere Thunderstorm WarningILNFranklin50 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2000Every severe thunderstorm warning in 2000

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.