Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Mar 18, 1986, 5:14 PM CST for Jasper County, Iowa. It was in force for 46 min.
The area
The counties it named.
The facts
- Issued
- Mar 18, 1986, 5:14 PM CST (23:14 UTC)
- Expired
- Mar 18, 1986, 6:00 PM CST
- In force
- 46 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Jasper 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, 11.2 hours before the alert went out and 279 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
- 3569 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 369 m²/s²
- 0-3 km storm-relative helicity
- 373 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 182320 SVRDSM IAC099-240000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 514 PM CST TUE MAR 18 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF CENTRAL IOWA...JASPER AT 510 PM...LARGE HAIL WAS REPORTED IN WESTERN JASPER COUNTY NEAR COLFAX..WHICH IS ABOUT 20 MILES EAST OF DES MOINES. THE STORM WAS MOVING EAST AT 25 MILES AN HOUR..AND WILL MOVE INTO THE NEWTON AREA BETWEEN 530 PM AND 545 PM THIS EVENING. 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. TRUETT/KS
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, Mar 18, 2:44 PM CST, 2 hours 30 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 240 PM CST TUE MAR 18 1986 AT 230 PM CST...SEVERAL STRONG THUNDERSTORMS WERE OCCURRING IN SOUTHWEST IOWA..FROM 10 MILES NORTH OF ATLANTIC..TO 20 MILES SOUTH OF OMAHA/COUNCIL BLUFFS. PEA TO MARBLE SIZE HAIL WAS ASSOCIATED WITH MOST OF THE STORMS..ALTHOUGH AN ISOLATED REPORT OF GOLFBALL SIZE OCCURRED JUST WEST OF ATLANTIC ABOUT 235 PM. THESE THUNDERSTORMS WERE MOVING ONLY SLOWLY EAST AT 10 MILES AN HOUR. INTENSITY WAS INCREASING. OVER THE REMAINDER OF IOWA..ISOLATED LIGHT SHOWERS CONTINUED WITH SOME LIGHT SNOW IN THE EXTREME NORTHWEST. THESE SHOWERS WERE MOVING NORTH AT 40 MILES AN HOUR. BINGHAM :
Special weather statement, Mar 18, 3:50 PM CST, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 345 PM CST TUE MAR 18 1986 AT 335 PM CST...AN ISOLATED STRONG THUNDERSTORM WAS IN SOUTHWEST IOWA..10 MILES NORTHEAST OF ATLANTIC. SMALL HAIL WAS ASSOCIATED WITH THIS STORM. THE STRONG STORM WAS PART OF A LARGER AREA OF SHOWERS AND THUNDERSHOWERS OVER THE WEST CENTRAL AND SOUTHWEST COUNTIES. MOVEMENT WAS EAST AT 10 MILES AN HOUR. IN ADDITION..A STRONG STORM HAD DEVELOPED IN SOUTHEAST IOWA NEAR ALBIA..15 MILES WEST OF OTTUMWA. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR. OVER THE REMAINDER OF IOWA..ISOLATED LIGHT SHOWERS CONTINUED OVER THE NORTHERN COUNTIES. SOME SNOW WAS FALLING OVER THE EXTREME NORTH- WEST. SIECZYNSKI
Special weather statement, Mar 18, 4:53 PM CST, 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
450 PM CST TUE MAR 18 1986
...THUNDERSTORMS WITH HAIL RUMBLE ACROSS CENTRAL IOWA...
SCATTERED THUNDERSTORMS WERE MOVING THROUGH CENTRAL IOWA THIS
AFTERNOON..AND MOST OF THESE STORMS WERE PRODUCING HAIL.
AT 450 PM..THE NARROW LINE OF STORMS STRETCHED FROM NEAR MARSHALLTOWN..
THROUGH THE SOUTHEAST SIDE OF DES MOINES..INTO NORTHERN WARREN COUTNY.
PEA TO MARBLE SIZED HAIL..AND OCCASIONALLY LARGER..HAS BEEN REPORTED IN
SOUTHERN DES MOINES AND IN NORTHERN WARREN COUNTY IN AND EAST OF
NORWALK.
THESE STORMS WILL CONTINUE PRODUCING SMALL HAIL AS THEY MOVE EAST
AT 10 MILES AN HOUR.
TRUETTSpecial weather statement, Mar 18, 4:56 PM CST, 18 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 445 PM CST TUE MAR 18 1986 AT 435 PM CST...SHOWERS AND THUNDERSTORMS WERE OVER CENTRAL..WEST CENTRAL AND SOUTHWEST IOWA. SEVERAL STRONG STORMS WERE OVER THE CENTRAL COUNTIES NEAR REDFIELD..35 MILES WEST OF DES MOINES..NEAR NORWALK AND ALSO JUST WEST OF MARSHALLTOWN. HAIL WAS ASSOCIATED WITH THESE STORMS. AT 443 PM..UP TO GOLF BALL SIZE WAS REPORTED IN NORWALK. THE SHOWERS AND STORMS WERE MOVING EAST AT 20 MILES AN HOUR. IN ADDITION..SCATTERED SHOWERS AND THUNDERSHOWERS WERE OVER THE SOUTH- EAST AND EAST CENTRAL COUNTIES. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR. SIECZYNSKI
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.