Alert archive / Indiana / Tornado Warnings in 2001

Tornado Warning 16, NWS Northern Indiana

August 18, 2001Allen County, Indiana

NWS Northern Indiana issued this tornado warning at Aug 18, 2001, 5:23 PM EST for Allen County, Indiana. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Aug 18, 2001, 5:23 PM EST (22:23 UTC)
Expired: Aug 18, 2001, 5:50 PM EST
In force: 27 min
Issued by: NWS Northern Indiana
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Allen County, IN

The radar

The Northern Indiana radar (KIWX), 60 km from the middle of the area, began a volume at 22:26 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
Aug 18, 5:25 PM EST	Thunderstorm Wind	Ft Wayne, IN	Tree fell on house.

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
Aug 18, 4:45 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.4 hours before the alert went out and 219 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: 23 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1121 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 71 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.

113 
WFUS53 KIWX 182223
TORFWA
INC003-182250-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
523 PM EST SAT AUG 18 2001

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEAST ALLEN COUNTY IN INDIANA

* UNTIL 550 PM EST

* AT 523 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  A POSSIBLE TORNADO 4 MILES NORTHEAST OF FORT WAYNE...MOVING EAST AT
  40 MPH.

* SOME LOCATIONS IN THE PATH OF THIS TORNADO ARE...
  GRABILL
  WOODBURN
  LEO 
  CEDARVILLE

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. IF YOU ARE CAUGHT IN
THE PATH OF A TORNADO...LEAVE THE VEHICLE AND SEEK SHELTER IN A
STURDY BUILDING. AS A LAST RESORT...SEEK SHELTER IN A DITCH OR LOW
SPOT.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN NORTHERN INDIANA.

LAT...LON 4118 8523 4101 8515 4112 8481 4127 8479

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 2:46 PM EST	Severe Thunderstorm Warning	IWX	White	34 min
Aug 18, 2:53 PM EST	Severe Thunderstorm Warning	IWX	White	47 min
Aug 18, 3:20 PM EST	Severe Thunderstorm Warning	IWX	Cass	40 min
Aug 18, 4:19 PM EST	Severe Thunderstorm Warning	IWX	Cass, Miami	31 min
Aug 18, 4:42 PM EST	Severe Thunderstorm Warning	IWX	Grant	38 min
Aug 18, 4:51 PM EST	Severe Thunderstorm Warning	IWX	Allen, Huntington, Wells	39 min
Aug 18, 5:12 PM EST	Severe Thunderstorm Warning	IWX	Blackford	28 min
Aug 18, 5:37 PM EST	Severe Thunderstorm Warning	IWX	Adams	53 min

Nearby

Tornado Warnings in Indiana, 2001 Every tornado warning in 2001 Tornadoes 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.