Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 97, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 14, 1987, 5:52 PM CDT for Kossuth County, Iowa. It was in force for 38 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 14, 1987, 5:52 PM CDT (22:52 UTC)
- Expired
- Jul 14, 1987, 6:30 PM CDT
- In force
- 38 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Kossuth 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 14, 5:55 PM CDT | Hail 1 | Kossuth, 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
Minneapolis, MN (KSTC), launched 12:00Z, 10.9 hours before the alert went out and 189 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
- 1212 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 91 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 142252 SVRDSM IAC109-142330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 552 PM CDT TUE JUL 14 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTH CENTRAL IOWA... SOUTHERN KOSSUTH A SEVERE THUNDERSTORM WAS LOCATED IN SOUTHWEST KOSSUTH COUNTY OF NORTH CENTRAL IOWA. QUARTER SIZE HAIL 40 MILE AN HOUR WINDS WERE REPORTED NEAR THE TOWN OF WHITTEMORE WHICH IS ABOUT 40 MILES EAST OF SPENCER. TOWNS AFFECTED ARE ALGONA...ST JOSEPH...AND IRVINGTON. THE STORM WAS MOVING SOUTHEAST AROUND 20 MILES 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. IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE IMMEDIATELY. IF SEVERE WEATHER CONDITIONS ARE OBSERVED..PLEASE ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. ADAMS
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 14, 5:16 PM CDT, 36 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 515 PM CDT TUE JUL 14 1987 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT A LARGE PART OF NORTHERN AND CENTRAL IOWA UNTIL 10 PM TONIGHT... VERY HEAVY THUNDERSTORMS WERE IN THE SPENCER AND IOWA GREAT LAKES AREAS. THESE STORMS WERE MOVING EAST SOUTHEAST AT 15 MILES AN HOUR. THE STRONGEST STORMS CAN PRODUCE SMALL HAIL...DANGEROUS LIGHTNING AND WIND GUSTS UP TO 50 MILES AN HOUR. BOATERS AND CAMPERS IN THE IOWA RECREATIONAL LAKES AREA IN NORTHWEST IOWA SHOULD MOVE TO A PLACE OF SHELTER. AT 450 PM...A SHERIFF DEPUTY REPORTED PEA TO MARBLE SIZE HAIL...AND A WIND GUST OF 48 MILES AN HOUR AT EVERLY. MCQUIRTER
Special weather statement, Jul 14, 5:44 PM CDT, 8 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 545 PM CDT TUE JUL 14 1987 THE SEVERE THUNDERSTORM WATCH FOR PARTS OF EXTREME NORTHWEST IOWA HAS BEEN CANCELLED. COUNTIES NO LONGER INCLUDED IN THE WATCH ARE PLYMOUTH...WOODBURY... MONONA...OSCEOLA...O BRIEN...DICKINSON...AND CLAY. MOST OF THE THUNDERSTORMS HAVE MOVED EAST OF THESE AREAS AND VERY LITTLE THREAT WILL REMAIN FOR ANY SEVERE WEATHER THIS EVENING. THE SEVERE THUNDERSTORM WATCH WILL REMAIN IN EFFECT FOR THOSE OTHER COUNTIES IN NORTHERN AND CENTRAL IOWA THAT WERE INCLUDED IN THE ORIGINAL WATCH. ADAMS
Local storm report, Jul 14, 5:50 PM CDT, 2 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WATERLOO IA
550 PM CDT TUE JUL 14 1987
TIME EVENT
440 PM CDT EXTREME HEAVY RAIN AND 3/4 INCH HAIL CAUSED EXTENSIVE
(APPROX.) CROP DAMAGE, STRIPPING THE CORN STALKS COMPLETELY, SOUTH
OF GRAFTON IN WORTH COUNTY AND NEAR PLYMOUTH IN MITCHELL
COUNTY. GOLF BALL-SIZED WAS ALSO ESTIMATED AS BEING 2
INCHES DEEP ON THE HIGHWAY.
453 PM CDT 3/4 INCH HAIL...40 MPH WINDS AND HEAVY RAIN OCCURRED 15
(APPROX.) MILES WEST OF OSAGE, IA IN MITCHELL COUNTY.
HEITKAMPThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 4:08 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell, Worth | 67 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1987Every severe thunderstorm warning in 1987
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.