Alert archive / Iowa / Tornado Warnings in 1997

Tornado Warning 26, NWS Quad Cities, IA

June 15, 1997Linn County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jun 15, 1997, 7:58 PM CDT for Linn County, Iowa. It was in force for 62 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
Jun 15, 1997, 7:58 PM CDT (00:58 UTC)
Expired
Jun 15, 1997, 9:00 PM CDT
In force
62 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Linn County, IA

The radar

The Quad Cities radar (KDVN), 99 km from the middle of the area, began a volume at 00:59 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.

IssuedProductOfficeLasted
Jun 15, 6:30 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 104 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, Davenport, at 00:00Z on 1997-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 654 joules per kilogram.LCLLFCEL10008507005003002001001 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, Davenport, at 00:00Z on 1997-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
654 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1426 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
145 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLI 160059 RRA
TORMLI
IAC113-160200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
758 PM CDT SUN JUN 15 1997

* TORNADO WARNING FOR
  LINN COUNTY - IN EAST CENTRAL IOWA

* UNTIL 900 PM CDT
 
* THIS TORNADO WILL REACH NEAR
  MARION AIRPORT                     AROUND 800 PM CDT
  CENTRAL CITY                       AROUND 800 PM CDT
  WHITTIER                           AROUND 810 PM CDT
  WAUBEEK                            AROUND 810 PM CDT
  SPRINGVILLE                        AROUND 810 PM CDT

* AT 758 PM CDT...A TORNADO WAS REPORTED BY A SPOTTER IN THE
  VICINITY OF CEDAR RAPIDS MOVING EAST AT 25 MPH.
 
THIS IS A DANGEROUS STORM. ACT QUICKLY. GO TO A SHELTbER BELOW
GROUND IF AVAILABLE. OTHERWISE GO TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. AVOID WINDOWS. ABANDON CARS AND MOBILE HOMES...TAKE
COVER IN A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

TEH/EAH
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 7:33 PM CDTTornado WarningDVNBenton47 min
Jun 15, 9:03 PM CDTSevere Thunderstorm WarningDVNBuchanan, Delaware47 min
Jun 15, 9:24 PM CDTSevere Thunderstorm WarningDVNDelaware, Jones, Linn31 min
Jun 15, 9:31 PM CDTSevere Thunderstorm WarningDVNLinn49 min
Jun 15, 9:44 PM CDTSevere Thunderstorm WarningDVNDubuque, Jones46 min
Jun 15, 9:53 PM CDTSevere Thunderstorm WarningDVNDubuque, Jackson47 min
Jun 15, 10:29 PM CDTSevere Thunderstorm WarningDVNJones36 min
Jun 15, 10:34 PM CDTSevere Thunderstorm WarningDVNClinton61 min
Jun 15, 10:38 PM CDTSevere Thunderstorm WarningDVNJackson47 min
Jun 15, 10:46 PM CDTFlash Flood WarningDVNJackson, Jones3 hr
Jun 16, 12:35 AM CDTFlash Flood WarningDVNJackson, Jones3 hr
Jun 16, 12:35 AM CDTFlash Flood WarningDVNJackson5 hr
Jun 16, 12:35 AM CDTFlash Flood WarningDVNJones5 hr
Jun 16, 12:46 AM CDTFlash Flood WarningDVNDes Moines, Henry, Lee, Van Buren5 hr
Jun 16, 12:46 AM CDTFlash Flood WarningDVNJefferson5 hr

Nearby

Tornado Warnings in Iowa, 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.