Alert archive / Iowa / Tornado Warnings in 1997

Tornado Warning 43, NWS Quad Cities, IA

August 3, 1997Clinton County, Iowa

NWS Quad Cities, IA issued this tornado warning at Aug 3, 1997, 2:58 PM CDT for Clinton County, Iowa. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 3, 1997, 2:58 PM CDT (19:58 UTC)
Expired: Aug 3, 1997, 3:45 PM CDT
In force: 47 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Clinton County, IA

The radar

The Quad Cities radar (KDVN), 32 km from the middle of the area, began a volume at 19:59 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.

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 3, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.0 hours before the alert went out and 31 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: 13 J/kg
Mixed-layer CIN: -260 J/kg
Mixed-layer LCL: 1867 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 22 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 
TTAA00 KMLI 031958 RRA
TORMLI
IAC045-032045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
258 PM CDT SUN AUG 3 1997

* TORNADO WARNING FOR
  CLINTON COUNTY IN EAST CENTRAL IOWA

* UNTIL 345 PM CDT
 
* SOME LOCATIONS AFFECTED
  CHARLOTTE                          AROUND 310 PM CDT
  GOOSE LAKE                         AROUND 320 PM CDT
  BRYANT                             AROUND 325 PM CDT

* AT 256 PM CDT...A DEVELOPING TORNADO WAS INDICATED BY QUAD CITIES
  IA DOPPLER RADAR 24 MILES NORTHWEST OF CLINTON OR 4 MILES
  NORTHWEST OF PETERSVILLE MOVING EAST AT 25 MPH.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE TO BE IS
IN A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY
FURNITURE. IF NO BASEMENT IS AVAILABLE...FIND SHELTER IN AN
INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE
BLANKETS...PILLOWS...OR CUSHIONS TO COVER YOUR BODY. AVOID
WINDOWS.

HENDRICKS

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 2:02 PM CDT	Severe Thunderstorm Warning	DVN	Jones	63 min
Aug 3, 2:30 PM CDT	Severe Thunderstorm Warning	DVN	Clinton	65 min
Aug 3, 2:50 PM CDT	Severe Thunderstorm Warning	DVN	Cedar	50 min
Aug 3, 2:53 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	62 min
Aug 3, 3:20 PM CDT	Severe Thunderstorm Warning	DVN	Benton	65 min
Aug 3, 3:38 PM CDT	Severe Thunderstorm Warning	DVN	Scott	47 min
Aug 3, 3:51 PM CDT	Tornado Warning	DVN	Scott	49 min
Aug 3, 4:47 PM CDT	Severe Thunderstorm Warning	DVN	Scott	48 min

Nearby

Tornado Warnings in Iowa, 1997 Every tornado warning in 1997 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.