Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 88, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 24, 1986, 10:33 PM CDT for Polk County, Iowa. It was in force for 27 min. 1 report 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
- Jul 24, 1986, 10:33 PM CDT (03:33 UTC)
- Expired
- Jul 24, 1986, 11:00 PM CDT
- In force
- 27 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Polk 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 |
|---|---|---|---|
| Jul 24, 10:45 PM CDT | Thunderstorm Wind 50 | Polk, 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, 3.6 hours before the alert went out and 236 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
- 3586 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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
Special weather statement, Jul 24, 5:44 PM CDT, 4 hours 49 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 543 PM CDT THU JUL 24 1986 AT 535 PM CDT...STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND POSSIBLY SMALL HAIL HAD RAPIDLY DEVELOPED OVER EXTREME NORTH CENTRAL IOWA..ABOUT 15 MILES NORTH OF MASON CITY. THESE STORMS WERE PART OF A MUCH LARGER AREA OF SHOWERS AND STORMS THAT EXTENDED INTO SOUTHEAST MINNESOTA..AND NORTHEAST NEBRASKA. RAPID THUNDERSTORM ~DEVELOPEMENT IS LIKELY OVER MUCH OF NORTHWEST IOWA BY 630 PM. PEOPLE LIVNG IN NORTHWEST IOWA..SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER OVER THE NEXT TWO TO THREE HOURS. THE STORMS WERE MOVING EAST AT 40 MILES AN HOUR. BARLOW
Special weather statement, Jul 24, 8:16 PM CDT, 2 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 815 PM CDT THU JUL 24 1986 ...SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHERN..NORTH CENTRAL AND NORTHEAST IOWA UNTIL 11 PM CDT... AT 815 PM CDT WATERLOO NATIONAL WEATHER SERVICE RADAR WAS SHOWING A LINE OF THUNDERSTORMS IN NORTH CENTRAL IOWA FROM GOLDFIELD, IOWA 25 MILES NORTHEAST OF FORT DODGE.. TO 25 MILES SOUTH OF MASON CITY. THE STRONGER THUNDERSTORMS WERE LOCATED NEAR SHEFFIELD. GENERAL THUNDERSTORMS WERE LOCATED IN NORTH CENTRAL AND PARTS OF NORTHERN IOWA. THESE THUNDERSTORMS IN NORTH CENTRAL IOWA HAVE PRODUCED PEA SIZE HAIL AT WODEN, IOWA 35 MILES WEST OF MASON CITY..FREQUENT LIGHTNING AND SOME LOCALLY HEAVY RA=IN AS THEY MOVE EAST AROUND 30 MILES AN HOUR. THE THUNDERSTORMS IN NORTH CENTRAL AND NORTHEAST IOWA HAVE NOT PRODUCED ANY SEVERE WEATHER..HOWEVER SEVERE STORMS ARE STILL POSSIBLE UNTIL 11PM. ROBB
Special weather statement, Jul 24, 8:55 PM CDT, 1 hour 38 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 845 PM CDT THU JUL 24 1986 A PORTION OF THE SEVERE THUNDERSTORM WATCH FOR NORTHERN IOWA HAS BEEN CANCELLED. THE FOLLOWING COUNTIES AND CITIES ARE NOT IN THE WATCH ANY LONGER. ...NORTHWEST... BUENA VISTA CHEROKEE CLAY DICKINSON EMMET O'BRIEN OSCEOLA PALO ALTO PLYMOUTH POCHAHONTAS ...NORTH CENTRAL... KOSSUTH ...WEST CENTRAL... CALHOUN IDA MONONA SAC WOODBURY \ CITIES NOT INCLUDED IN THE WATCH AREA NY LONGER... ALGONA CHEROKEE ESTHERVILLE LE MARS SIOUX CITY SPENCER STORM LAKE lSEVERE THUNDERSTORM WATCH DOES REMAIN IN EFFECT FOR A LARGE PART OF NORTH CENTRAL AND NORTHEAST IOWA UNTIL 11 PM CDT. FORSTER
Special weather statement, Jul 24, 8:59 PM CDT, 1 hour 34 minutes before
<PQ< SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE DES MOINES IA 845 PM CDT THU JUL 24 1986 A PORTION OF THE SEVERE THUNDERSTORM WATCH FOR NORTHERN IOWA HAS BEEN CANCELLED. THE FOLLOWING COUNTIES AND CITIES ARE NOT IN THE WATCH ANY LONGER. ...NORTHWEST... BUENA VISTA CHEROKEE CLAY DICKINSON EMMET O'BRIEN OSCEOLA PALO ALTO PLYMOUTH POCHAHONTAS ...NORTH CENTRAL... KOSSUTH ...WEST CENTRAL... CALHOUN IDA MONONA SAC WOODBURY \ CITIES NOT INCLUDED IN THE WATCH AREA NY LONGER... ALGONA CHEROKEE ESTHERVILLE LE MARS SIOUX CITY SPENCER p STORM LAKE SEVERE THUNDERSTORM WATCH DOES REMAIN IN EFFECT FOR A LARGE PART OF NORTH CENTRAL AND NORTHEAST IOWA AND ADJACENT AREAS OF MINNESOTA AND WISCONSIN UNTIL 11 PM CDT. FORSTER
Special weather statement, Jul 24, 9:56 PM CDT, 37 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 950 PM CDT THU JUL 24 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF WEST CENTRAL INTO NORTHEASTERN IOWA TIL 11 PM... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA FROM 830 TO 945 PM. AT 930 PM... THE BAND OF INTENSE THUNDERSTORMS THAT HAS BEEN IN NORTHWESTERN IOWA THIS EVENING WAS MOVING INTO THE CENTRAL COUNTIES. THIS BAND OF STORMS STRETCHED FROM CHARLES CITY THROUGH CLARION AND JEFFERSON TO ATLANTIC. THE STRONGER STORMS WERE DUMPING TORRENTIAL RAINS..AND SOME HAIL. THEY WERE ALSO ACCOMPANIED BY WINDS UP TO 50 MILES AN HOUR. THIS BAND OF INTENSE STORMS WILL BE MOVING INTO THE WATERLOO AND DES MOINES METRO AREAS BY 11 PM. THEY WERE MOVING EAST AT 30 MILES AN HOUR. POTTS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 7:19 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 26 min |
| Jul 24, 9:55 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 35 min |
| Jul 24, 11:42 PM CDT | Severe Thunderstorm Warning | DMX | Iowa, Johnson, Linn | 33 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.