Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 63, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 1986, 10:00 PM CDT for Guthrie County, Iowa. It was in force for 40 min. 2 reports 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
- Jun 29, 1986, 10:00 PM CDT (03:00 UTC)
- Expired
- Jun 29, 1986, 10:40 PM CDT
- In force
- 40 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Guthrie 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 |
|---|---|---|---|
| Jun 29, 10:05 PM CDT | Tornado F2 | Guthrie, IA | |
| Jun 29, 10:50 PM CDT | Tornado F2 | Guthrie, 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
Omaha, NE (KOAX), launched 00:00Z, 3.0 hours before the alert went out and 161 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3623 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 262 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSUX 300321 COR SVRDSM IAC077-300340- <PQ< BULLETIN - IMMEDIATE BROADCAST REQUESTED..CORRECTED TIME SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1000 PM CDT SUN JUN 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1040 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL IOWA...NORTHERN AND CENTRAL GUTHRIE THIS WARNING INCLUDES THE CITY OF GUTHRIE CENTER AT 1000 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR IND GUTHRIE COUNTY IOWA MOVING SOUTHEAST AT 35 MOLES AN HOUR. REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING..AND HEAVY RAINS THAT CAN QUICKLY FLOOD LOW LYING AREAS. PEOPLE IN THE PATH OF THIS STORM SHOULD TAKE APPROPRIATE ACTION IMMEDIATELY. KROPP
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 29, 4:14 PM CDT, 5 hours 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 410 PM CDT SUN JUN 29 1986 ..A TORNADO WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHWEST IOWA UNTIL 10 PM THIS EVENING.. AT 400 PM CDT.. NO PRECIPITATION WAS CURRENTLY OBSERVED IN IOWA. HOWEVER INTENSE THUNDERSTORMS WERE MOVING ACROSS SOUTHEAST SOUTH DAKOTA..AND THEY CURRENTLY APPEAR TO BE MOVING SOUTHEAST..WHICH COULD BRING THEM INTO NORTHWEST IOWA..OVER THE NEXT 2 H2OURS. BARLOW
Special weather statement, Jun 29, 4:52 PM CDT, 5 hours 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 451 PM CDT SUN JUN 29 1986 ..A TORNADO WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHWEST IOWA UNTIL 10 PM THIS EVENING.. AT 435 PM CDT.. NO PRECIPITATION WAS CURRENTLY OBSERVED IN IOWA. HOWEVER INTENSE THUNDERSTORMS WERE MOVING ACROSS SOUTHEAST SOUTH DAKOTA..MOVEMENT OF THE STORMS WAS SOUTHEAST AND COULD MOVE INTO NORTHWEST IOWA BETWEEN 7 AND 730 PM THIS EVENING. B[ARLOW
Special weather statement, Jun 29, 5:45 PM CDT, 4 hours 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 545 PM CDT SUN JUN 29 1986 ..A TORNADO WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHWEST IOWA UNTIL 10 PM THIS EVENING.. AT 535 PM CDT.. NO PRECIPITATION WAS CURRENTLY OBSERVED IN IOWA. HOWEVER INTENSE THUNDERSTORMS CONTINUED TO MOVE ACROSS SOUTHEAST SOUTH DAKOTA.. LIGHT SHOWERS WERE DEVELOPING ALONG THE IOWA..MINNESOTA AND SOUTH DAKOTA BORDERS. HOWEVER THE MUCH MORE INTENSE STORMS SHOULD BE MOVING INTO NORTHWEST IOWA BETWEEN 7 AND 730 PM. BARLOW
Special weather statement, Jun 29, 6:45 PM CDT, 3 hours 15 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 643 PM CDT SUN JUN 29 1986 ..A TORNADO WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHWEST IOWA UNTIL 10 PM THIS EVENING.. AT 635 PM CDT.. SCATTERED LIGHT SHOWERS HAD DEVELOPED ALONG THE IOWA/MINNESOTA BORDER BETWEEN SPENCER AND SPIRIT LAKE..MEANWHILE INTENSE THUNDERSTORMS WHICH HAVE HAD A HISTORY OF PRODUCING LARGE HAIL AND VERY HEAVY RAIN WERE ENTERING NORTHWEST IOWA. THE STORM WAS ENTERING PLYMOUTH COUNTY NEAR THE TOWN OF AKRON..ABOUT 25 MILES NORTH OF SIOUX CITY. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 TO 30 MILES AN HOUR. BARLOW
Special weather statement, Jun 29, 9:21 PM CDT, 39 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 915 PM CDT SUN JUN 29 1986 THE SEVERE THUNDERSTORM WARNING FOR GREENE COUNTY HAS EXPIRED. THE STORM HAS DECRESED IN INTENSITY AND^ WAS MOVING SOUTHEAST AROUND 30 MILES AN HOUR. FORSTER
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:30 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 45 min |
| Jun 29, 8:26 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 49 min |
| Jun 29, 9:00 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 45 min |
| Jun 29, 10:18 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 42 min |
| Jun 29, 10:25 PM CDT | Flash Flood Warning | DMX | Dallas, Polk | 6 hr |
| Jun 29, 11:50 PM CDT | Tornado Warning | DMX | Polk | 25 min |
| Jun 30, 1:12 AM CDT | Severe Thunderstorm Warning | DMX | Iowa, Poweshiek | 48 min |
| Jun 30, 3:45 AM CDT | Flash Flood Warning | DMX | Polk | 6 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.