Alert archive / Iowa / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 55, NWS Des Moines, IA

June 28, 1986Hancock County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 28, 1986, 9:01 AM CDT for Hancock County, Iowa. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jun 28, 1986, 9:01 AM CDT (14:01 UTC)
Expired
Jun 28, 1986, 10:00 AM CDT
In force
59 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Hancock 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

Minneapolis, MN (KSTC), launched 12:00Z, 2.0 hours before the alert went out and 197 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, Minneapolis, MN at 12:00Z on 1986-06-28Temperature 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, Minneapolis, MN at 12:00Z on 1986-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
2062 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
104 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 KALO 281401
SVRALO
IAC081-281500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WATERLOO IA
901 AM CDT SAT JUN 28 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1000 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTH CENTRAL IOWA...HANCOCK

AT 900 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 30 MILES WEST OF
MASON CITY ALONG THE KOSSUTH/HANCOCK COUNTY LINE. IT WAS MOVING
SOUTHEAST AT 40 MPH.

THIS THUNDERSTORM WILL LIKELY PRODUCE WINDS IN EXCESS OF 60 MPH AND
HAIL 3/4 INCH OR LARGER IN DIAMETER.

 GOLF BALL SIZE HAIL HAS BEEN REPORTED WITH THIS THUNDERSTORM IN
 KOSSUTH COUNTY.

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 28, 3:38 AM CDT, 5 hours 23 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
334 AM CDT SAT JUN 28 1986

AT 330 AM CDT...
A VERY STRONG THUNDERSTORM WAS LOCATED OVER NORTH CENTRAL IOWA..ABOUT
Special weather statement, Jun 28, 4:08 AM CDT, 4 hours 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
407 AM CDT SAT JUN 28 1986

A VERY STRONG THUNDERSTORM WAS LOCATED OVER NORTH CENTRAL IOWA.  IT
WAS LOCATED OVER SOUTHERN KOSSUTH COUNTY..EXTENDING INTO NORTHERN
HUMBOLDT COUNTY.

THE STORM WAS MOVING SOUTHEAST AT 35 MILES AN HOUR AND WILL MOVE
INTO THE EAGLE GROVE AND CLARION AREAS BETWEEN 415 AND 515 AM THIS
MORNING.

PEOPLE IN THE PATH OF THE STORM CAN EXPECT VERY HEAVY RAIN..GUSTY
WINDS TO AROUND 40 MILES AN HOUR AND DANGEROUS LIGHTNING.

SCHUMACHER
Special weather statement, Jun 28, 5:20 AM CDT, 3 hours 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
515 AM CDT SAT JUN 28 1986

AT 515 AM STRONG THUNDERSTORMS WERE LOCATED OVER EXTREME NORTHWEST
AND NORTH CENTRAL IOWA..MAINLY OVER DICKINSON..EMMET..AND KOSSUTH
COUNTIES.

THESE STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR.  NO SEVERE
WEATHER HAD BEEN REPORTED THROUGH 515AM..HOWEVER..THEY WERE PRODUCING
BRIEF VERY HEAVY RAINS..SMALL HAIL..AND WIND GUSTS TO 30 TO 40 MILES
AND HOUR IN SOME PLACES.

ELLINGSON
Special weather statement, Jun 28, 5:45 AM CDT, 3 hours 16 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
540 AM CDT SAT JUN 28 1986

AT 534 AM CDT...
INTENSE THUNDERSTORMS HAD MOVED INTO THE NORTHWEST COUNTIES OF IOWA.
THEY WERE IN A 30 MILE WIDE AREA EXTENDING FROM NEAR EMMETSBURG TO
ROCK RAPIDS.

THE STORMS WERE MOVING SOUTHEAST AT 40 MILES AN HOUR AND WILL MOVE
INTO THE ALGONA..SPEMCER AND MILFORD AREAS BETWEEN 540 AND 640 AM THIS
MORNING.

STRONG GUSTY 5WINDS OF UP TO 60 MILES AN HOUR..VERY HEAVY RAIN..AND
HAIL CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS.  PEOPLE
SHOULD SEEK A PLACE OF SAFETY IF THREATENING CONDITIONS APPROACH.

SCHUMACHER
Special weather statement, Jun 28, 6:39 AM CDT, 2 hours 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
636 AM CDT SAT JUN 28 1986

AT 631 AM CDT...
VERY STRONG THUNDERSTORMS CONTINUED OVER PARTS OF NORTH CENTRAL IOWA.
THEY WRE IN A 20 MILE WIDE AREA EXTENDING FROM 30 MILES SOUTHWEST OF
MASON CITY TO ABOUT 15 MILES SOUTHEAST OF SPENCER.

THESE STORMS HAVE PRODUCED VERY HEAVY RAIN..SOME HAIL..AND WIND GUSTS
OF 30 TO 40 MILES AN HOUR.  THEY WERE WEAKENING AS THEY CONTINUED THEIR
SOUTHEAST MOVEMENT.  THE STRONGEST STORM WAS THE ONE SOUTHEAST OF
SPENCER.  THIS STORM SHOULD BE NEAR HUMBOLDT BY 745 AM THIS MORNING.

ELSEWHERE..SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER MUCH OF
THE REST OF NORTH CENTRiAL AND NORTHWEST IOWA.  THEY WERE NORTH OF
AN IOWA FALLS..FORT DODGE..TO HAWARDEN LINE.

ALL OF THE RAIN WAS MOVING SOUTHEAST AT 40 MILES AN HOUR.
\
SCHUMACHER
Special weather statement, Jun 28, 7:50 AM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
747 AM CDT SAT JUN 28 1986

..A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE NORTHEAST TWO
THIRDS OF IOWA UNTIL 2 PM..

AT 735 AM CDT...
A VERY STRONG THUNDERSTORM CAPABLE OF PRODUCING VERY HEAVY RAIN..HAIL
AND WIND GUSTS OF 30 TO 40 MILES AN HOUR ALONG FREQUENT LIGHTNING WAS
LOCATED JUST NORTH OF FORT DODGE.  THERE HAS BEEN NO INDICATION OF
SEVERE WEATHER ASSOCIATED WITH STORM..HOWEVER PEOPLE IN THE PATH OF
THIS STORM SHOULD MONITOR CONDITIONS CLOSELY AND BE PREPARED TO TAKE
SHELTER.

THIS STORMS WAS PART OF AN AREA OF SHOWERS AND STORMS THAT CONTINUED
TO MOVE INTO NORTHWEST AND NORTH CENTRAL IOWA FROM SOUTHWEST MINNESOTA.

IN ADDITION LIGHT SHOWERS WERE ALSO OCCURRING IN THE SIOUX CITY AREA.

THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 40 MILES AN HOUR.

BARLOW

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 5:33 AM CDTSevere Thunderstorm WarningDMXDickinson37 min
Jun 28, 8:36 AM CDTSevere Thunderstorm WarningDMXKossuth49 min
Jun 28, 12:38 PM CDTSevere Thunderstorm WarningDMXMarion22 min
Jun 28, 12:53 PM CDTSevere Thunderstorm WarningDMXMahaska47 min
Jun 28, 1:12 PM CDTSevere Thunderstorm WarningDMXMonroe, Wapello33 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1986Every severe thunderstorm warning in 1986

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.