Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 48, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 10, 1986, 11:26 PM CDT for Washington County, Iowa. It was in force for 14 min.
The area
The counties it named.
The facts
- Issued
- Jun 10, 1986, 11:26 PM CDT (04:26 UTC)
- Expired
- Jun 10, 1986, 11:40 PM CDT
- In force
- 14 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Washington 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, 4.4 hours before the alert went out and 193 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
- 2866 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 110426 SVRDSM IAC183-110500- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1126 PM CDT TUE JUN 10 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1200 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST IOWA...EASTERN WASHINGTON THIS WARNING INCLUDES THE CITIES OF RIVERSIDE AND AINSWORTH.. ..BETWEEN 15 AND 25 MILES TO THE SOUTH OF IOWA CITY. AT 1125 PM RADAR INDICATED A SEVERE STORM IN CENTRAL WASHINGTON MOVING THE EAST AT 35 MILES AN HOUR. THIS STORM WILL BE INTO THE RIVERSIDE AND AINSWORTH AREAS BETWEEN 1130 AND 1145 PM. REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE DAMAG$ING 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. WEINBRECHT/FERRY
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 10, 8:49 PM CDT, 2 hours 37 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 840 PM CDT TUE JUN 10 1986 ...A TORNADO WATCH IS IN EFFECT TIL 2 AM FOR MOST OF EASTERN IOWA... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA..AS OF 840 PM. AT 830 PM... SHOWERS AND THUNDERSTORMS WERE SCATTERED FROM CENTRAL INTO SOUTH CENTRAL IOWA...FROM ABOUT MARSHALLTOWN THROUGH OSCEOLA TO MOUNT AYR. THIS BAND ALSO EXTENDED ON INTO NORTHERN MISSOURI. A FEW OF THEM WERE DROPPING BRIEF HEAVY RAINS. MEANWHILE...THERE WERE ISOLATED THUNDERSHOWERS IN NORTHERN IOWA....NEAR DECORAH AND BANCROFT. ALL OF THE PRECIPITATION WAS MOVING NORTHEAST AT 35 MILES AN HOUR. POTTS
Special weather statement, Jun 10, 9:20 PM CDT, 2 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 920 PM CDT TUE JUN 10 1986 A LINE OF STRONG THUNDERSTORMS PRODUCING HEAVY RAINS AND WINDS AROUND 40 MILES AN HOUR EXTENDED FROM JUST OF THE EAST OF NEWTON TO AROUND 10 MILES TO THE EAST OF INDIANOLA. OR..30 MILES TO THE EAST AND SOUTHEAST OF DES MOINES. THIS LINE IS MOVING TO THE EAST AT 35 MILES AN HOUR. BOATERS..ESPECIALLY FISHERMAN AT LAKE RED ROCK LAKE SHOULD GET OFF THE LAKE AS SOON AS POSSIBLE WINDS TO 40 MILES AN HOUR MAY OCCUR AROUND THE DAM BETWEEN 925 PM AND 945 PM. WEINBRECHT
Special weather statement, Jun 10, 9:56 PM CDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 955 PM CDT TUE JUN 10 1986 ...A TORNADO WATCH IS IN EFFECT TIL 2 AM FOR MOST OF EASTERN IOWA... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA..AS OF 955 PM. AT 930 PM... SHOWERS AND THUNDERSTORMS WERE INDICATED IN A 30 MILE WIDE BAND FROM NORTHEAST INTO SOUTH CENTRAL IOWA. THE BAND WAS CENTERED FROM WATER- LOO TO 30 MILES EAST OF DES MOINES TO 45 MILES EAST OF LAMONI AND ON INTO NORTHERN MISSOURI. THE HEAVIEST THUNDERSTORMS WERE LOCATED 30 MILES EAST OF DES MOINES..SOUTH OF NEWTON AND SOUTHEAST OF MARSHALLTOWN NEAR TOLEDO. AT 940 PM A REPORT OF 40 TO 50 MILE AN HOUR WINDS WAS RECIEVED FROM THE TOLEDO AREA. ALL OF THESE STORMS ARE CAPABLE OF PRODUCING STRONG WINDS AND VERY HEAVY RAINS. NEWLY DEVELOPED THUNDERSTORMS WERE INDICATED OVER WEST CENTRAL IOWA. THE STORMS WERE LOCATED FROM FORT DODGE TO AUDUBON..70 MILES WEST OF DES MOINES. OTHER NEWLY DEVELOPED THUNDERSTORMS WERE INDICATED OVER NORTH CENTRAL IOWA NORTH OF MASON CITY. ALL OF THE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR FERRY/POTTS
Special weather statement, Jun 10, 10:08 PM CDT, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1005 PM CDT TUE JUN 10 1986 AT 755 PM A DOWNBURST OCCURRED NEAR THE HOLIDAY INN AT GRAYS LAKE IN SOUTH DES MOINES. A PATH AROUND 200 YARDS WIDE BLEW DOWN APPROXIMATELY 10 TREES. A DOWNBURST IS A STRONG NARROW WIND THAT USUALLY OCCURS ON THE LEADING EDGE OF A THUNDERSTORM. WEINBRECHT
Special weather statement, Jun 10, 10:27 PM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT <PQ< NATIONAL WEATHER SERVICE DES MOINES IA 1025 PM CDT TUE JUN 10 1986 ...A TORNADO WATCH IS IN EFFECT TILL 2 AM FOR MOST OF EASTERN IOWA... A BAND OF SHOWERS AND THUNDERSTORMS CONTINUED TO MOVE ACROSS EASTERN IOWA. AT 1010 PM THIS 30 MILE WIDE BAND WAS LOCATED FROM JUST SOUTH OF WATERLOO TO JUST WEST OF OTTUMWA AND EXTENDED ON INTO NORTHERN MISSOURRI. THE HEAVIEST THUNDERSTORMS WERE LOCATED 30 MILES NORTHWEST OF CEDAR RAPIDS NEAR VINTON AND 60 MILES EAST OF DES MOINES IN THE BROOKLYN..MONTEZUMA AND NEW SHARON AREAS. THESE STORMS HAVE NOT PRODUCED ANY SEVERE WEATHER YET..HOWEVER THEY HAVE BEEN RESPONSIBLE FOR WIND GUSTS OF 40 TO 50 MILES AND BRIEF VERY HEAVY RAINS. THE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. BETWEEN 1025 PM AND 1115 PM THESE STORMS WILL BE MOVING THROUTH LINN AND IOWA COUNTIES INCLUDING THE CEDAR RAPIDS AREA. FERRY
Special weather statement, Jun 10, 10:59 PM CDT, 27 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1055 PM CDT TUE JUN 10 1986 ...A TORNADO WATCH IS IN EFFECT TIL 2 AM FOR MOST OF EASTERN IOWA... NO SEVERE WEATHER HAS BEEN REPORTED IN IOWA..AS OF 1055 PM. AT 1035 PM... A 30 MILE WIDE BAND OF THUNDERSTORMS CONTINUED TO MOVE THROUGH EASTERN IOWA. THE BAND WAS LOCATED FROM 15 MILES EAST OF WATERLOO NEAR INDEPENDENCE TO OTTUMWA AND EXTENDED INTO NORTHERN MISSOURI. THESE THUNDERSTORMS HAVE BEEN PRODUCING WIND GUSTS OF 40 TO 50 MILES AN HOUR AND BRIEF VERY HEAVY RAINS. AT 1012 THE AIRPORT AT OTTUMWA REPORTED A WIND GUST OF 55 MILES AN HOUR. AT 1022 A 50 MILE AN HOUR GUST OCCURRED AT VINTON. THIS LINE OF THUNDERSTORMS WILL BE MOVING THROUGH LINN..JOHNSON..WASHINGTON..JEFFERSON AND VAN BUREN COUNTIES BETWEEN 1045 PM AND 1145 PM. ANOTHER BAND OF SHOWERS AND THUNDERSTORMS WERE INDICATED FROM SOUTHWEST IOWA AT COUNCIL BLUFFS TO NORTHEAST IOWA 30 MILES NORTH OF WATERLOO. THIS BAND WAS ABOUT 30 MILES WIDE WITH THE HEAVIEST STORMS LOCATED JUST SOUTH OF COUNCIL BLUFFS..NEAR CARROLL AND MANNING /75 MILES NORTHWEST OF DES MOINES AND IN NORTH CENTRAL IOWA JUST EAST OF CLARION WHICH IS 30 MILES SOUTH OF MASON CITY. THE STORMS WERE PRODUCING VERY HEAVY RAINS AND POSSIBLY SOME GUSTY WINDS THE THUNDERSTORMS WERE ALL MOVING EAST AT 35 MILES AN HOUR. FERRY/POTTS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 11:14 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 31 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; the sounding from the Mesonet's radiosonde archive.