Alert archive / Illinois / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 87, NWS Quad Cities, IA

August 9, 1995Rock Island County, Illinois; Scott County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 9, 1995, 6:44 PM CDT for Rock Island County, Illinois; Scott County, Iowa. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Aug 9, 1995, 6:44 PM CDT (23:44 UTC)
Expired
Aug 9, 1995, 7:30 PM CDT
In force
46 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Scott County, IA, Rock Island County, IL

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.7 hours before the alert went out and 11 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 12:00Z on 1995-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2688 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 12:00Z on 1995-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.193958Sfc1 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
2688 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
772 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLI 092346 RRA
SVRMLI
IAC163-ILC161-100030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
644 PM CDT WED AUG 9 1995
 
THE NATIONAL WEATHER SERVICE IN QUAD CITIES IA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL IOWA
 
   ...SCOTT COUNTY
 
 
IN NORTHWEST ILLINOIS
 
   ...ROCK ISLAND COUNTY
 
AT 643 PM CDT... DOPPLER WEATHER RADAR INDICATED A SEVERE THUNDERSTORM
IN NORTHERN ROCK ISLAND NEAR HILLSDALE AND CORDOVA MOVING SOUTH AT 25
MPH. THIS STORM WILL REACH PRINCETON SHORTLY... AND MAY REACH THE QUAD
CITIES BY 715 PM CDT.
 
THE ROCK ISLAND COUNTY SHERIFF REPORTED NUMEROUS TREES AND POWER LINES
DOWN NEAR HILLSDALE.
 
DAMAGING WINDS AND LARGE HAIL ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!
 
HENDRICKS
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 5:03 PM CDTSevere Thunderstorm WarningDVNBureau27 min
Aug 9, 5:07 PM CDTSevere Thunderstorm WarningDVNCarroll53 min
Aug 9, 5:38 PM CDTSevere Thunderstorm WarningDVNWhiteside52 min
Aug 9, 6:55 PM CDTTornado WarningDVNScott35 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1995Severe Thunderstorm Warnings in Iowa, 1995Every severe thunderstorm warning in 1995

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.