Alert archive / Iowa / Tornado Warnings in 1997

Tornado Warning 47, NWS Quad Cities, IA

August 16, 1997Clinton County, Scott County, Iowa

NWS Quad Cities, IA issued this tornado warning at Aug 16, 1997, 6:53 PM CDT for Clinton County, Scott County, Iowa. 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: Aug 16, 1997, 6:53 PM CDT (23:53 UTC)
Expired: Aug 16, 1997, 7:55 PM CDT
In force: 62 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

Counties Clinton County, IA, Scott County, IA

What was reported inside it

Time	Report	Where	Remark
Aug 16, 7:55 PM CDT	Hail 1	Le Claire, IA

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 16, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.9 hours before the alert went out and 18 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: 3426 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMLI 162353 RRA
TORMLI
IAC045-163-170055-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
653 PM CDT SAT AUG 16 1997

* TORNADO WARNING FOR
  SOUTHERN CLINTON COUNTY IN EAST CENTRAL IOWA
  NORTHERN SCOTT COUNTY IN EAST CENTRAL IOWA

* UNTIL 755 PM CDT
 
* SOME LOCATIONS AFFECTED
  LOW MOOR                           AROUND 659 PM CDT
  FOLLETTS                           AROUND 700 PM CDT
  PRINCETON                          AROUND 710 PM CDT
  CAMANCHE                           AROUND 725 PM CDT
  CLINTON                            AROUND 735 PM CDT

* AT 651 PM CDT...A DEVELOPING TORNADO WAS INDICATED BY QUAD CITIES
  IA DOPPLER RADAR AND SPOTTER REPORTS 13 MILES SOUTHWEST OF CLINTON
  OR NEAR MCAUSLAND AND FOLLETTS MOVING EAST AT 10 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.

TEH/BLH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 5:05 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	60 min
Aug 16, 5:14 PM CDT	Severe Thunderstorm Warning	DVN	Jones	46 min
Aug 16, 5:27 PM CDT	Tornado Warning	DVN	Jackson, Jones	63 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.