Alert archive / Iowa / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 14, NWS Quad Cities, IA

July 6, 1987Cedar County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 6, 1987, 6:06 PM CDT for Cedar County, Iowa. It was in force for 39 min.

The area

The counties it named.

The facts

Issued: Jul 6, 1987, 6:06 PM CDT (23:06 UTC)
Expired: Jul 6, 1987, 6:45 PM CDT
In force: 39 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

Peoria Regional, IL (KPIA), launched 12:00Z, 11.1 hours before the alert went out and 177 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: NaN m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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

Local storm report, Jul 6, 1:31 PM CDT, 4 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
610 PM CDT THU JUN 18 1987

111 PM...MARBLE SIZE HAIL AND STRONG WIND AT CITY OF OLIN IN
         SOUTHERN JONES COUNTY.

116 PM...3/4 tINCH AND LARGER REPORTED IN THE CITY OF WYOMING IN
         SOUTHER JONES COUNTY.

REPORTS WERE FROM THE CIVIL DEFENSE DIRECTOR IN JONES COUNTY.

KOWALSKI

Local storm report, Jul 6, 2:46 PM CDT, 3 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
245 PM CDT THU JUN 18 1987

111 PM...MARBLE SIZE HAIL AND STRONG WIND AT CITY OF OLIN IN
         SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.

116 PM...3/4 INCH AND LARGER REPORTED IN THE CITY OF WYOMING IN
         SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.

145 PM...MARBLE SIZE AND LARGER HAIL...VERY STRONG WIND AND HEAVY
         RAIN IN CITY OF HANOVER...JO-DAVIES COUNTY NORTHWEST
         ILLINOIS...REPORTED BY SHERIFFS OFFICE.

1-130 PM...SMALL HAIL...1.37 INCH OF RAIN IN ONE HOUR REPORTED BY
         LOCK AND DAM 11...BELLEVUE IOWA...JACKSON COUNTY.

KOWALSKI

Local storm report, Jul 6, 3:09 PM CDT, 2 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
245 PM CDT MON JUL 6 1987

...CORRECTION FOR DAY AND DATE...

111 PM...MARBLE SIZE HAIL AND STRONG WIND AT CITY OF OLIN IN
         SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.

116 PM...3/4 INCH AND LARGER REPORTED IN THE CITY OF WYOMING IN
         SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.

145 PM...MARBLE SIZE AND LARGER HAIL...VERY STRONG WIND AND HEAVY
         RAIN IN CITY OF HANOVER...JO-DAVIES COUNTY NORTHWEST
         ILLINOIS...REPORTED BY SHERIFFS OFFICE.

1-130 PM...SMALL HAIL...1.37 INCH OF RAIN IN ONE HOUR REPORTED BY
         LOCK AND DAM 11...BELLEVUE IOWA...JACKSON COUNTY.

KOWALSKI

Special weather statement, Jul 6, 3:50 PM CDT, 2 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
345 PM CDT MON JUL 6 1987

    ...THUNDERSTORM WATCH UNTIL 700 PM CDT...

AT 340 PM THUNDERSTORMS WERE MOVING THROUGH DELAWARE AND NORTHERN
JONES COUNTIES IN EAST CENTRAL IOWA.

THE STRONGEST STORMS WERE LOCATED NORTH OF MANCHESTER AND NEAR RYAN
IN DELAWARE COUNTY 35 MILES WEST OF DUBUQUE...MOVING SOUTHEAST AT
15 MILES AN HOUR.

REPORTS OF WIND 40 TO 50 MPH AND HEAVY RAIN OCCURRED AS THE STORMS
MOVED THROUGH THE WESTERN PART OF DELAWARE COUNTY.

IF THREATENING WEATHER APPROACHES...TAKE COVER IMMEDIATELY.

KOWALSKI

Special weather statement, Jul 6, 5:05 PM CDT, 1 hour 1 minute before

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Special weather statement, Jul 6, 5:36 PM CDT, 30 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 12:35 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jones	55 min
Jul 6, 12:55 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	65 min
Jul 6, 4:35 PM CDT	Severe Thunderstorm Warning	DVN	Jones	55 min
Jul 6, 2:00 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	60 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1987 Every severe thunderstorm warning in 1987

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.