Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 18, NWS Quad Cities, IA

June 27, 1990Cedar County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 27, 1990, 6:59 PM CDT for Cedar County, Iowa. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jun 27, 1990, 6:59 PM CDT (23:59 UTC)
Expired
Jun 27, 1990, 7:35 PM CDT
In force
36 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Cedar 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 12:00Z, 12.0 hours before the alert went out and 389 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 12:00Z on 1990-06-27Temperature 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 12:00Z on 1990-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939587897Sfc1 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
609 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
221 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 280005 COR
SVRMLI
IAC031-280100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED TO NORTHWEST CEDAR COUNTY...
NATIONAL WEATHER SERVICE MOLINE IL
659 PM CDT WED JUN 27 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY

   IN THE EXTREME EAST PART OF IOWA
      CEDAR

AT 650 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED IN NORTHWEST
CEDAR COUNTY...15 MILES SOUTHWEST OF CEDAR RAPIDS OR 40 MILES
NORTHWEST OF MOLINE ILLINOIS. WINDS OF 50 TO 60 MILES AN HOUR WERE
REPORTED AROUND MECHANICSVILLE IOWA.

THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR.
SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE... TIPTON...
MECHANICSVILLE AND WEST BRANCH.

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.

A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WIND OF 60 MPH OR MORE...
LARGE HAIL...FREQUENT DANGEROUS LIGHTNING AND HEAVY RAIN.

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

FOB*ERT

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 27, 4:10 PM CDT, 2 hours 49 minutes before
ILZ004-IAZ015-272215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
410 PM CDT WED JUN 27 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM CDT...

STRONG THUNDERSTORMS DEVELOPED IN THE QUAD CITIES THIS AFTERNOON.

AT 400 PM CDT A STRONG THUNDERSTORM WAS DUMPING BRIEF AMOUNTS OF HEAVY
RAIN AND MARBLE SIZE HAIL ACROSS PARTS OF THE QUAD CITIES.  THE
STRONGEST PART OF THIS THUNDERSTORM WAS JUST NORTH OF DAVENPORT IOWA
MOVING SUOUTHEAST AT 10 MILES AN HOUR.

ANYONE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON SHOULD KEEP AN EYE
ON THE SKY AND BE PREPARED TO MOVE TO A PLACE OF SHELTER IF THREATENING
WEATHER APPROACHES.

MEYER
Special weather statement, Jun 27, 5:16 PM CDT, 1 hour 43 minutes before
ILZ004-IAZ015-272315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
510 PM CDT WED JUN 27 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM CDT...

THUNDERSTORMS CONTINUED TO ROLL ACROSS EAST CENTRAL IOWA AND NORTHWEST
ILLINOIS THIS AFTERNOON.

AT 5 PM CDT A THUNDERSTORM WAS 15 MILES NORTHEAST OF THE QUAD CITIES
MOVING SOUTHEAST AT 10 MILES AN HOUR.  THIS THUNDERSTORM IN THE PAST
HAS PRODUCED BRIEF HEAVY...SMALL HAIL AND BRIEF GUSTY WIND.

A SECOND THUNDERSTORM WAS JUST BRUSHING THE WEST BORDER OF CEDAR COUNTY
IN EAST CENTRAL IOWA...OR ABOUT 55 MILES NORTHWEST OF THE QUAD CITIES.
OTHER SHOWERS WERE OVER MUSCATINE IOWA AND SOUTH OF MUSCATINE...OR 25
MILES SOUTHWEST OF MOLINE ILLINOIS.  THESE SHOWERS AND THUNDERSTORMS
WERE ALSO MOVING SOUTHEAST AT 10 MILES AN HOUR.
MEYER
Special weather statement, Jun 27, 5:21 PM CDT, 1 hour 38 minutes before
ILZ004-IAZ015-272315-

SPECIAL WEATHER STATEMENT...CORRECTED TO ADD WORD "RAIN"...
NATIONAL WEATHER SERVICE MOLINE IL
510 PM CDT WED JUN 27 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM CDT...

THUNDERSTORMS CONTINUED TO ROLL ACROSS EAST CENTRAL IOWA AND NORTHWEST
ILLINOIS THIS AFTERNOON.

AT 5 PM CDT A THUNDERSTORM WAS 15 MILES NORTHEAST OF THE QUAD CITIES
MOVING SOUTHEAST AT 10 MILES AN HOUR.  THIS THUNDERSTORM IN THE PAST
HAS PRODUCED BRIEF HEAVY RAIN...SMALL HAIL AND BRIEF GUSTY WIND.

A SECOND THUNDERSTORM WAS JUST BRUSHING THE WEST BORDER OF CEDAR COUNTY
IN EAST CENTRAL IOWA...OR ABOUT 55 MILES NORTHWEST OF THE QUAD CITIES.
OTHER SHOWERS WERE OVER MUSCATINE IOWA AND SOUTH OF MUSCATINE...OR 25
MILES SOUTHWEST OF MOLINE ILLINOIS.  THESE SHOWERS AND THUNDERSTORMS
WERE ALSO MOVING SOUTHEAST AT 10 MILES AN HOUR.
MEYER
Special weather statement, Jun 27, 5:54 PM CDT, 1 hour 5 minutes before
IAZ008-WIZ018-ILZ001-280000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
645 PM CDT WED JUN 27 1990

...SEVERE THUNDERSTORM WATCH TIL 8PM FOR IOWA COUNTIES IN THE
TRI-STATE AREA...

AT 640 PM CDT...SHOWERS AND A FEW THUNDERSTORMS WERE LOCATED OVER THE
WESTERN PART OF OUR TRI-STATE AREA.  THE LEADING EDGE OF THE RAIN WAS
BY GUTTENBURG IN CLAYTON COUNTY...30 MILES NORTHWEST OF
DUBUQUE...AND EXTENDED SOUTH TO OXFORD JUNCTION...40 MILES SOUTHWEST
OF DUBUQUE.

A COUPLE OF STRONGER STORMS WERE LOCATED BETWEEN ANAMOSA AND
MONTICELLO IN JONES COUNTY...25 MILES SOUTHWEST OF DUBUQUE.

MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR.

SEVERE THUNDERSTORM WATCH FOR WISCONSIN COUNTIES PHAS BEEN CANCELLED.

PERIODS OF HEAVY RAIN...WINDS OF 45 MILES AN HOUR...AND SOME PEA SIZE
HAIL HAS BEEN REPORTED WITH THIS AREA OF RAIN AS IT MOVED SOUTH.

IF THREATENING WEATHER IS SIGHTED...TAKE COVER IMMEDIATELY.

KOWALSKI
Special weather statement, Jun 27, 6:17 PM CDT, 42 minutes before
ILZ004-IAZ015-280015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
610 PM CDT WED JUN 27 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM CDT...

THUNDERSTORMS CONTINUED ACROSS EAST CENTRAL IOWA AND NORTHWEST ILLINOIS
THIS EVENING.

AT 600 PM CDT THUNDERSTORMS WERE 20 MILES WEST AND SOUTH OF THE QUAD
CITIES.  THESE THUNDERSTORMS WERE MOVING SOUTH AT 10 MILES AN HOUR.
BECAUSE OF THE SLOW MOVEMENT...HEAVY RAIN PRODUCING SOME STREET
AND LOW LAND FLOODING CAN BE EXPECTED.  IF LIVE NEAR FLOOD PRONE AREAS
BE ON THE LOOKOUT FOR RISING WATER.  NEVER DRIVE THROUGH ROADS COVERED
WITH WATER.

STRONGER THUNDERSTORMS IN NORTHEAST IOWA WERE APPROACHING CEDAR AND
CLINTON COUNTIES OF EAST CENTRAL IOWA.  THESES THUNDERSTORMS HAVE HAD A
PAST HISTORY OF PRODUCING LARGE HAIL AND WINDS STRONG ENOUGH TO BLOW
DOWN TREES.  IF YOU LIVE IN THE ABOVE MENTIONED COUNTIES...BE
PREPARED FOR THESE POTENTIALLY DANGEROUS STORMS TO MOVE INTO YOUR
AREA AROUND 700 PM CDT.  THESE THUNDERSTORMS WERE MOVING
SOUTHEAST AT 25 MILES AN HOUR.

AT 530 PM CDT AN OBSERVER IN MOLINE ILLINOIS REPORTED 1.40 INCH OF
RAINFALL FROM THE EARLIER THUNDERSTORMS THAT MOVE THROUGH THE QUAD
CITIES.

IF THREATENING WEATHER APPROACHES WHERE YOU LIVE THIS EVENING...BE
PREPARED TO SEEK SHELTER.

MEYER
Special weather statement, Jun 27, 6:32 PM CDT, 27 minutes before
IAZ008-280100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
630 PM CDT WED JUN 27 1990

...SEVERE THUNDERSTORM WATCH TIL 8PM FOR IOWA COUNTIES IN THE
TRI-STATE AREA...

AT 625 PM CDT...STRONG THUNDERSTORMS WERE OCCURRING NEAR ANAMOSA IN
JONES COUNTY...40 MILES SOUTHWEST OF DUBUQUE.

MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR...AND WILL BE AFFECTING THE
CENTRAL AND SOUTHERN PART OF JONES COUNTY FOR THE NEXT HOUR OR SO.

WINDS OF 40 TO 50 MILES AN HOUR...ALONG WITH HEAVY RAIN AND A LOT OF
LIGHTNING WAS REPORTED IN ANAMOSA.

ELSEWHERE...RAIN CONTINUES OVER MUCH OF EASTERN IOWA...WITH RAIN
TAPERING OFF OVER THE WESTERN TRI-STATE AREA.

REMEMBER...A SEVERE THUNDERSTORM WAT|CH IS IN EFFECT UNTIL 800 PM CDT
AND A SEVERE STORMS IS POSSIBLE.

IF THREATENING WEATHER IS SIGHTED...TAKE COVER IMMEDIATELY...AND IF
TIME PERMITS...CALL YOUR REPORT TO THE NEAREST LAW ENFORCEMENT AGENCY.
KOWALSKI

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.