Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 1, NWS Quad Cities, IA

March 9, 1990Jones County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 9, 1990, 11:09 PM CST for Jones County, Iowa. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Mar 9, 1990, 11:09 PM CST (05:09 UTC)
Expired
Mar 9, 1990, 11:45 PM CST
In force
36 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Jones County, IA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 5.2 hours before the alert went out and 359 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, Green Bay/Straub, WI at 00:00Z on 1990-03-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 1990-03-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
212 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 KDSM 100509
SVRDSM
IAC105-100545-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1109 PM CST FRI MAR 9 1990
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST IOWA
          ...KEOKUK
 
AT 1105 PM NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG AND
INTENSIFYING THUNDERSTORM IN THE VICINITY OF SIGOURNEY...IN KEOKUK
COUNTY IN SOUTHEAST IOWA. THE STORM WAS IN WESTERN KEOKUK COUNTY...
ABOUT 60 MILES SOUTHEAST OF DES MOINES...MOVING EAST AT 30 TO 35
MILES AN HOUR.
 
THIS STORM WILL AFFECT THE TOWNS AND CITIES OF SIGOURNEY...HARPER...
AND KEOTA.
 
DOWD
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAlVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 10, 12:17 AM CSTSevere Thunderstorm WarningDVNMuscatine43 min
Mar 10, 1:02 AM CSTSevere Thunderstorm WarningDVNScott43 min
Mar 10, 8:31 AM CSTSevere Thunderstorm WarningDVNMuscatine, Scott29 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm warning in 1990

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.