Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 99, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 14, 1987, 10:15 PM CDT for Adams County, Iowa. It was in force for 35 min.
The area
The counties it named.
The facts
- Issued
- Jul 14, 1987, 10:15 PM CDT (03:15 UTC)
- Expired
- Jul 14, 1987, 10:50 PM CDT
- In force
- 35 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Adams 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 144 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
- 3552 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 205 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 150315 SVRDSM IAC003-150400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1015 PM CDT TUE JUL 14 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA... ADAMS AT 1010 PM CDT THE ADAMS COUNTY SHERIFF REPORTED THAT A PATROL CAR WAS BLOWN OFF THE ROAD JUST NORTH AND EAST OF CORNING. HE ESTIMA- TED WINDS OF 80 MILES AN HOUR. THIS IS ABOUT 60 MILES EAST SOUTH- EAST OF COUNCIL BLUFFS. TOWNS AFFECTED ARE CORNING...NODAWAY AND BROOKS. THE STORM WAS MOVING SOUTHEAST AROUND 25 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. 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. 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, 7:30 PM CDT, 2 hours 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 730 PM CDT TUE JUL 14 1987 ...SEVERE THUNDERSTORM WATCH UNTIL 10 PM FOR PARTS OF NORTH CENTRAL AND NORTHEAST IOWA. AT 725 PM CDT RADAR SHOWED A NARROW LINE OF INTENSE THUNDERSTORMS EXTENDING FROM PARKERSBURG...20 MILES WEST OF WATERLOO TO WAVERLY ...IOWA 15 MILES NORTH OF WATERLOO. THESE THUNDERSTORMS WERE PRODUCING BRIEF HEAVY RAIN...SMALL HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING AS THE MOVE SOUTHEAST AT 20 MPH. RESIDENTS IN BREMER...BLACK HAWK AND GRUNDY COUNTIES SHOULD BE ALERT FOR THESE THUNDERSTORMS UNTIL 830PM CDT. OTHER THUNDERSTORMS WERE SCATTERED OVER NORTH CENTRAL AND NORTHEAST IOWA AND WERE ALSO MOVING *SOUTHEAST AT 20MPH. AN HOUR. ROBB
Special weather statement, Jul 14, 7:33 PM CDT, 2 hours 42 minutes before
SPECIAL WEATHER STATEMENT...LAST LINE CORRECTED NATIONAL WEATHER SERVICE WATERLOO IA 730 PM CDT TUE JUL 14 1987 ...SEVERE THUNDERSTORM WATCH UNTIL 10 PM FOR PARTS OF NORTH CENTRAL AND NORTHEAST IOWA. AT 725 PM CDT RADAR SHOWED A NARROW LINE OF INTENSE THUNDERSTORMS EXTENDING FROM PARKERSBURG...20 MILES WEST OF WATERLOO TO WAVERLY ...IOWA 15 MILES NORTH OF WATERLOO. THESE THUNDERSTORMS WERE PRODUCING BRIEF HEAVY RAIN...SMALL HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING AS THE MOVE SOUTHEAST AT 20 MPH. RESIDENTS IN BREMER...BLACK HAWK AND GRUNDY COUNTIES SHOULD BE ALERT FOR THESE THUNDERSTORMS UNTIL 830PM CDT. OTHER THUNDERSTORMS WERE SCATTERED OVER NORTH CENTRAL AND NORTHEAST ,IOWA AND WERE ALSO MOVING SOUTHEAST AT 20MPH. ROBB
Special weather statement, Jul 14, 8:45 PM CDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 PM CDT TUE JUL 14 1987 ...A SEVERE THUNDERSTORM WATCH FOR NORTHERN AND CENTRAL IOWA UNTIL 10 PM TONIGHT... AROUND 800 PM...SMALL HAIL WAS REPORTED AROUND THE FORT DODGE AREA. AT 832 PM...STRONG THUNDERSTORMS WERE 30 MILES NORTHEAST OF OMAHA/ COUNCIL BLUFFS...AND JUST NORTH AND EAST OF FORT DODGE. THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAIN...WIND GUSTS TO 40 MILES AN HOUR...AND PEA TO MARBLE SIZE HAIL. THESE STORMS WERE PART OF AN AREA OF SHOWERS AND THUNDERSTORMS THAT STRETCHED FROM NORTHEAST INTO SOUTHWEST IOWA. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES >AN HOUR. BRUCE/SCOTT
Special weather statement, Jul 14, 9:15 PM CDT, 1 hour before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 914 PM CDT TUE JUL 14 1987 THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN NORTH CENTRAL AND WEST CENTRAL IOWA... WINNEBAGO WORTH MITCHELL HANCOCK CERRO GORDO FLOYD HUMBOLDT WRIGHT WEBSTER CRAWFORD CARROLL GREENE SHELBY A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF NORTHEAST CENTRAL AND WEST CENTRAL IOWA UNTIL 1000 PM TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER NORTHEAST... CENTRAL AND WEST CENTRAL IOWA. THE MOST INTENSE STORMS WERE LOCATED NEAR OAKLAND OR 25 MILES EAST OF COUNCIL BLUFFS AND BETWEEN STORY CITY AND NTEWTON OR 30 MILES NORTH AND EAST OF DES MOINES. THE STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. MCQUIRTER
Special weather statement, Jul 14, 9:49 PM CDT, 26 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 PM CDT TUE JUL 14 1987 ...A SEVERE THUNDERSTORM WATCH FOR PARTS OF CENTRAL AND WEST CENTRAL IOWA UNTIL 10 PM TONIGHT... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA BETWEEN 900 AND 935 PM. AT 935 PM...STRONG THUNDERSTORMS WERE 30 MILES EAST OF OMAHA/COUNCIL BLUFFS...AND WERE ALSO IN A LINE STRETCHING FROM 40 MILES NORTH OF DES MOINES...TO 40 MILES EAST OF DES MOINES. THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAIN...WIND GUSTS TO 40 MILES AN HOUR...AND PEA TO MARBLE SIZE HAIL. THESE STORMS WERE PART OF AN AREA OF SHOWERS AND THUNDERSTORMS THAT STRETCHED FROM NORTHEAST INTO SOUTHWEkST AND SOUTH CENTRAL IOWA. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. BRUCE/SCOTT
Special weather statement, Jul 14, 10:08 PM CDT, 7 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1007 PM CDT TUE JUL 14 1987 THE SEVERE THUNDERSTORM WATCH NUMBER 389 HAS EXPIRED FOR THE REST OF NORTHEAST...CENTRAL AND WEST CENTRAL IOWA. THIS WATCH WILL NOT BE EXTENDED. SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER PARTS OF CENTRAL AND EASTERN IOWA UNTIL MIDNIGHT. HOWEVER...SHOWERS AND THUNDERSTORMS WILL LINGER OVER PARTS OF SOUTHEAST IOWA INTO WEDNESDAY MyORNING. BRIEF HEAVY RAINS AND SMALL HAIL MAYBE ASSOCIATED WITH SOME OF THE MORE HEAVIER STORMS. MCQUIRTER
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:25 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 35 min |
| Jul 14, 9:00 PM CDT | Tornado Warning | DMX | Buchanan | 30 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.