Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 64, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 1986, 10:18 PM CDT for Cass County, Iowa. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1986, 10:18 PM CDT (03:18 UTC)
- Expired
- Jun 29, 1986, 11:00 PM CDT
- In force
- 42 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Cass 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
Omaha, NE (KOAX), launched 00:00Z, 3.3 hours before the alert went out and 120 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 KDSM 300319 RRA SVRDSM IAC029-300400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1018 PM CDT SUN JUN 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...CASS AT 1015 PM CDT A SEVERE THUNDERSTORM WAS REPORTED NEAR EXIRA IOWA IN AUDUBON COUNTY ABOUT 70 MILES WEST OF DES MOINES. THE STORM WAS MOVING SOUTHEAST AT 25 TO 30 MILES AN HOUR. CITIES INCLUDED ARE ATLANTIC AND CUMBERLAND. 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. FORSTER/KS
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, 4:52 PM CDT, 5 hours 26 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 33 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 33 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, 57 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, 10:00 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 40 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; the sounding from the Mesonet's radiosonde archive.