Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 83, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 8, 1987, 2:17 PM CDT for Guthrie County, Iowa. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Jul 8, 1987, 2:17 PM CDT (19:17 UTC)
- Expired
- Jul 8, 1987, 3:00 PM CDT
- In force
- 43 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 7.3 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
- 3617 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- -17 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 081917 SVRDSM IAC077-082000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 217 PM CDT WED JUL 8 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 300 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL IOWA... WESTERN GUTHRIE AT 210 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME SOUTHWEST GUTHRIE COUNTY IN THE VICINITY OF ADAIR... A COMMUNITY ABOUT 50 MILES WEST OF DES MOINES. THE STORM WAS MOVING NORTH NORTHEAST AT 25 MILES AN HOUR. THE STORM WILL BE IN THE VICINITY OF GUTHRIE CENTER...THE COUNTY SEAT OF GUTHRIE COUNTY AND ABOUT 45 MILES WEST NORTHWEST OF DES MOINES AT ABOUT 230 PM CDT. 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. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF ONE IS SPOTTED. 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. BIKLE
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 8, 8:49 AM CDT, 5 hours 28 minutes before
SPECIAL WEATHER STATEMENT RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 AM CDT TUE JUL 7 1987 AT 835 AM...A STRONG THUNDERSTORM PRODUCING VERY HEAVY RAIN WAS LOCATED 30 MILES SOUTH OF DES MOINES NEAR OSCEOLA. THIS STORM WAS MOVING NORTH NORTHEAST AT 25 TO 30 MILES AND SHOULD BE MOVING THROUGH INDIANOLA AND PARTS OF SOUTHEAST DES MOINES OVER THE NEXT HOUR. THIS STORM WAS PART OF A 100 MILE WIDE BAND OF SHOWERS AND STORMS THAT; STRETCHED FROM NORTHWEST IOWA...NEAR CORRECTIONVILLE OR 25 MILES EAST OF SIOUX CITY SOUTHEAST TOS SIGOURNEY...OR 15 MILES NORTHEAST OF OTTUMWA. THE SHOWERS AND STOMS WERE MOVING NORTHEAST AT 25 TO 30 MILES AN HOUR. BARLOW
Special weather statement, Jul 8, 8:53 AM CDT, 5 hours 24 minutes before
SPECIAL WEATHER STATEMENT RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 AM CDT TUE JUL 7 1987 AT 835 AM...A STRONG THUNDERSTORM PRODUCING VERY HEAVY RAIN WAS LOCATED 30 MILES SOUTH OF DES MOINES NEAR OSCEOLA. THIS STORM WAS MOVING NORTH NORTHEAST AT 25 TO 30 MILES AND SHOULD BE MOVING THROUGH INDIANOLA AND PARTS OF SOUTHEAST DES MOINES OVER THE NEXT HOUR. THIS STORM WAS PART OF A 100 MILE WIDE BAND OF SHOWERS AND STORMS THATH STRETCHED FROM NORTHWEST IOWA...NEAR CORRECTIONVILLE OR 25 MILES EAST OF SIOUX CITY SOUTHEAST TO SIGOURNEY...OR 15 MILES NORTHEAST OF OTTUMWA. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 25 TO 30 MILES AN HOUR. BARLOW
Special weather statement, Jul 8, 1:49 PM CDT, 28 minutes before
SPECIAL WEATHER STATEMENT RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 148 PM CDT TUE JUL 7 1987 AT 135 PM...SHOWERS AND ISOLATED STRONG THUNDERSTORMS WERE BECOMING MORE NUMEROUS OVER THE SOUTHWEST HALF OF IOWA. MOST OF THE SHOWERS AND STORMS WERE OCCURRING SOUTHWEST OF A LINE FROM SPENCER IN NORTHWEST IOWA SOUTHEAST TO CENTERVILLE...60 MILES SOUTHEAST OF DES MOINES. THE STRONGEST STORMS WERE LOCATED JUST SOUTHWEST OF DES MOINES... 60 MILES SOUTH OF DES MOINES NEAR LAMONI AND 70 MILES WEST SOUTHWEST OF DES MOINES NEAR CUMBERLAND. THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...GUSTY WINDS AND DANGEROUS LIGHTNING. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 25 TO 30 MILES AN HOUR. BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 6:06 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy | 54 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; the sounding from the Mesonet's radiosonde archive.