Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 6, NWS Quad Cities, IA

March 13, 1990Clinton County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 13, 1990, 1:40 PM CST for Clinton County, Iowa. It was in force for 20 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: Mar 13, 1990, 1:40 PM CST (19:40 UTC)
Expired: Mar 13, 1990, 2:00 PM CST
In force: 20 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Clinton County, IA

The radar

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

What was reported inside it

Time	Report	Where	Remark
Mar 13, 1:50 PM CST	Hail 1.75	Clinton, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.7 hours before the alert went out and 348 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1706 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 45 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 KMLI 131940
SVRMLI
IAC045-132000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE MOLINE IL
140 PM CST TUE MAR 13 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 200 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE EXTREME EAST PART OF IOWA
      CENTRAL AND EASTERN CLINTON

AT 130 PM THE SCOTT COUNTY SHERIFF REPORTED GOLF BALL SIZE HAIL
AT LONG GROVE IN NORTHERN SCOTT COUNTY 18 MILES NORTH OF MOLINE.

THE STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR.

SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE... DEWITT...
MALONE AND ELVIRA.

FOR YOUR PROTECTION GO TO A SAFE PLACE IMMEDIATELY.  STAY INDOORS
AND AVOID WINDOWS.  IF OUTDOORS...DO NOT STAND UNDER A TREE OR IN
OPEN AREAS SUCH AS A FIELD.

IF TIME PERMITS...ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY
YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

PHILLIPS

9

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 12:39 AM CST	Severe Thunderstorm Warning	DVN	Cedar	31 min
Mar 13, 1:58 PM CST	Severe Thunderstorm Warning	DVN	Clinton	32 min
Mar 13, 2:10 PM CST	Severe Thunderstorm Warning	DVN	Jones	50 min
Mar 13, 3:45 PM CST	Severe Thunderstorm Warning	DVN	Scott	45 min
Mar 13, 4:26 PM CST	Tornado Warning	DVN	Scott	34 min
Mar 13, 4:59 PM CST	Tornado Warning	DVN	Clinton, Scott	31 min
Mar 13, 5:01 PM CST	Tornado Warning	DVN	Delaware	29 min
Mar 13, 5:09 PM CST	Tornado Warning	DVN	Dubuque, Jones	36 min
Mar 13, 5:25 PM CST	Tornado Warning	DVN	Dubuque	35 min
Mar 13, 5:31 PM CST	Tornado Warning	DVN	Clinton	29 min
Mar 13, 5:37 PM CST	Tornado Warning	DVN	Delaware	38 min
Mar 13, 5:39 PM CST	Tornado Warning	DVN	Cedar, Muscatine	36 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.