Alert archive / Iowa / Tornado Warnings in 1997
Tornado Warning 39, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 21, 1997, 3:56 PM CDT for Muscatine County, Scott County, Iowa; Rock Island County, Illinois. It was in force for 49 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
- Jul 21, 1997, 3:56 PM CDT (20:56 UTC)
- Expired
- Jul 21, 1997, 4:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Muscatine County, IA, Scott County, IA, Rock Island County, IL
The radar
The Quad Cities radar (KDVN), 18 km from the middle of the area, began a volume at 20:59 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 nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.9 hours before the alert went out and 24 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.
- Mixed-layer CAPE
- 101 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMLI 212058 RRA TORMLI IAC139-163-ILC161-212145- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 356 PM CDT MON JUL 21 1997 * TORNADO WARNING FOR MUSCATINE COUNTY IN EAST CENTRAL IOWA SCOTT COUNTY IN EAST CENTRAL IOWA ROCK ISLAND COUNTY IN NORTHWESTERN ILLINOIS * UNTIL 445 PM CDT * SOME LOCATIONS AFFECTED PLAINVIEW AROUND 357 PM CDT EDGINGTON AROUND 357 PM CDT BLUE GRASS AROUND 357 PM CDT WALCOTT AROUND 357 PM CDT MAYSVILLE STENDER AIRPORT AROUND 400 PM CDT ANDALUSIA AROUND 405 PM CDT BUFFALO AROUND 405 PM CDT BUFFALO HGTS AROUND 405 PM CDT MAYSVILLE AROUND 405 PM CDT DAVENPORT AROUND 430 PM CDT ROCK ISLAND AROUND 430 PM CDT * AT 354 PM CDT...A POSSIBLE TORNADO WAS INDICATED BY QUAD CITIES IA DOPPLER RADAR AND SPOTTER REPORTS 12 MILES WEST OF QUAD CITIES OR 1 MILE NORTHWEST OF BLUE GRASS MOVING EAST AT 15 MPH. STORMS HAD DEVELOPED RAPIDLY ALONG A FRONTAL BOUNDARY LOCATED ACROSS THE AREA. ANY OF THESE STORMS ARE CAPABLE OF PRODUCING SHORT LIVED TORNADOES. 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 BASEMZENT 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/TPH
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 10:18 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 62 min |
| Jul 20, 10:35 PM CDT | Severe Thunderstorm Warning | DVN | Clinton | 65 min |
| Jul 21, 3:53 PM CDT | Tornado Warning | DVN | Cedar | 47 min |
| Jul 20, 11:23 PM CDT | Severe Thunderstorm Warning | DVN | Whiteside | 67 min |
Nearby
Tornado Warnings in Iowa, 1997Tornado Warnings in Illinois, 1997Every tornado warning in 1997Tornadoes 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.