Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 65, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 30, 1986, 1:12 AM CDT for Iowa County, Poweshiek County, Iowa. It was in force for 48 min.
The area
The counties it named.
The facts
- Issued
- Jun 30, 1986, 1:12 AM CDT (06:12 UTC)
- Expired
- Jun 30, 1986, 2:00 AM CDT
- In force
- 48 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Iowa County, IA, Poweshiek 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 00:00Z, 6.2 hours before the alert went out and 252 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
- 47 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1224 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 176 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 300613 SVRDSM IAC157-095-300700- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 112 AM CDT MON JUN 30 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 200 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL IOWA...EXTREME EASTERN POWESHIEK AND WESTERN IOWA AT 0109 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER EASTERN POWESHIEK COUNTY...ROUGHLY 40 MILES WEST OF IOWA CITY. THIS STORM WAS MOVING TO THE EAST AT 35 MPH...AND WILL MOVE INTO THE WESTERN PART OF IOWA COUNTY BY 2AM. THIS INCLUDES THE WILLIAMSBURG AREA. 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. ELLINGSON
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, 9:21 PM CDT, 3 hours 51 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
Special weather statement, Jun 29, 10:48 PM CDT, 2 hours 24 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1045 PM CDT SUN JUN 29 1986 ...SEVERE THUNDERSTORM WATCH FOR A LARGE PART OF SOUTHERN AND CENTRAL IOWA UNTIL 5 AM MONDAY MORNING... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA BETWEEN 1010-1045 PM. AT 1035 PM...VERY STRONG THUNDERSTORMS WERE OVER WEST CENTRAL AND EAST CENTRAL IOWA. ONE STORM WAS JUST WEST OF GUTHRIE CENTER..50 MILES WEST OF DES MOINES. ANOTHER STORM WAS JUST EAST OF CEDAR RAPIDS. VERY HEAVY RAINS..BRIEF GUSTY WINDS AND POSSIBLY SOME SMALL HAIL CAN BE EXPECTED WITH THESE STORMS. ELSEWHERE..NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS EXTENDED FROM NORTHEAST INTO SOUTHWEST I/OWA. THE LEADING EDGE OF THE RAINFALL EXTENDED FROM THE QUAD CITIES THROUGH PELLA AND INDIANOLA TO THE SOUTH- WEST CORNER OF THE STATE. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. SIECZYNSKI
Special weather statement, Jun 29, 11:18 PM CDT, 1 hour 54 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1115 PM CDT SUN JUN 29 1986
...STRONG THUNDERSTORMS APPROACHING DES MOINES...
AT 1105 PM...A NARROW BAND OF VERY STRONG THUNDERSTORMS WAS OVER
CENTRAL IOWA. THE BAND WAS 15 MILES WIDE AND STRETCHED FROM NEVADA
THROUGH SAYLORVILLE RESERVOIR AND ADEL TO CRESTON.
VERY HEAVY RAINS..FREQUENT DANGEROUS LIGHTNING AND BRIEF GUSTY WINDS
WILL BE EXPERIENCED WITH THE PASSAGE OF THESE STORMS.
BY 1215 AM THIS BAND OF STORMS SHOULD EXTEND FROM NEWTON THROUGH
INDIANOLA TO OSCEOLA.
THE STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A LARGE PART OF
SOUTHERN AND CENTRALH IOWA UNTIL 5 AM MONDAY MORNING.
SIECZYNSKISpecial weather statement, Jun 29, 11:46 PM CDT, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1145 PM CDT SUN JUN 29 1986 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR A LARGE PART OF SOUTHERN AND CENTRAL IOWA UNTIL 5 AM MONDAY MORNING... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA BETWEEN 1040-1145 PM. WINDS GUSTS TO 52 MILES AN HOUR WERE RECORDED AT THE DES MOINES AIRPORT AT 1125 PM. AT 1135 PM...AN INTENSE THUNDERSTORM WAS IN EAST CENTRAL IOWA JUST WEST OF IOWA CITY..55 MILES WEST OF THE QUAD CITIES. OTHER STRONG STORMS WERE OVER CENTRAL AND SOUTHWEST IOWA IN AND AROUND NEVADA..DES MOINES..ADEL..WINTERSET AND CRESTON. VERY HEAVY RAINS..FREQUENT LIGHTNING AND WIND GUST BETWEEN 45U AND 50 MILES AN HOUR CAN BE EXPECTED WITH THESE STORMS. ELSEWHERE NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS EXTENDED FROM NORTHEAST INTO SOUTHWEST IOWA. THE SHOWERS AND STORMS WERE MOVNING SOUTHEAST AT 30 MILES AN HOUR. SIECZYNSKI
Special weather statement, Jun 30, 12:17 AM CDT, 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1215 AM CDT MON JUN 30 1986
...SEVERE THUNDERSTORM WATCH IN EFFECT FOR A LARGE PART OF
SOUTHERN AND CENTRAL IOWA UNTIL 5 AM MONDAY MORNING...
AT 1210 AM...STRONG THUNDERSTORMS WERE OVER EAST CENTRAL..CENTRAL
AND SOUTH CENTRAL IOWA. ONE GROUP OF STORMS WERE NEAR IOWA CITY.
OTHER STORMS WERE NEAR NEWTON..OSCEOLA AND ALSO WEST OF LAMONI
NEAR MT AYR.
VERY HEAVY RAINS..FREQUENT LIGHTNING AND WIND GUSTS BETWEEN 45 AND
50 MILES AN HOUR CAN BE EXPECTED WITH THESE STORMS.
AROUND OTHER PARTS OF IOWA..NUMEROUS SHOWERS AND SCATTERED THUNDER-
STORMS EXTENDED FROM EAST CENTRAL INTO SOUTHWEST IOWA.
THE SHOWERS AND STORmMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR.
{{}SIECZYNSKISpecial weather statement, Jun 30, 12:52 AM CDT, 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1250 AM CDT MON JUN 30 1986 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR A LARGE PART OF SOUTHERN AND CENTRAL IOWA UNTIL 5 AM MONDAY MORNING... AT 1235 AM...A NARROW BAND OF STRONG THUNDERSTORMS EXTENDED FROM CENTRAL INTO SOUTH CENTRAL IOWA. THE BAND WAS 10 MILES MILES WIDE AND STRETCHED FROM NEAR MARSHALLTOWN THROUGH PELLA AND KNOXVILLE TO JUST EAST OF LAMONI. OTHER STORNG STORMS WERE NEAR BELLE PLAINE AND MARENGO..ABOUT 25 MILES WEST OF CEDAR RAPIDS. VERY HEAVY RAINS..FREQUENT DANGEROUS LIGHTNING AND BRIEF WIND GUSTS OF 45 TO 50 MILES AN HOUR WILL BE EXPERIENCED WITH THE PASSAGE OF THESE STORMS. AROUND OTtHER PARTS OF IOWA..NUMEROUS SHOWERS AND SCATTERED THUNDER- STORMS WERE OVER ALL BUT THE NORTHWESTERN COUNTIES. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. SIECZYNSKI
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, 10:18 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, 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.