Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 3, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at May 8, 1986, 5:30 PM CDT for Henry County, Lee County, Iowa. It was in force for 30 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
- May 8, 1986, 5:30 PM CDT (22:30 UTC)
- Expired
- May 8, 1986, 6:00 PM CDT
- In force
- 30 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Henry County, IA, Lee 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 |
|---|---|---|---|
| May 8, 5:45 PM CDT | Thunderstorm Wind 52 | Henry, 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
Peoria Regional, IL (KPIA), launched 12:00Z, 10.5 hours before the alert went out and 162 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
- 1592 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 107 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 KMLI 082230 SVRMLI IAC087-111-082300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOLINE IL 530 PM CDT THU MAY 8 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST IOWA...HENRY AND NORTHERN LEE AT 525 PM CDT..RADAR INDICATED A SEVERE THUNDERSTORM SOUTH OF HOUGHTON IOWA...21 MILES WEST OF BURLINGTON..MOVING NORTHNORTHEAST 25 MPH. SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE TORNADOES WITH LITTLE OR NO WARNING..SO BE ALERT. SEVERE THUNDERSTORMS CAN PRODUCE ANY OR ALL OF THE FOLLOWING: DAMAGING WINDS OF 58 MPH OR MORE..HAIL 3/4 INCH IN DIAMETER OR LARGER. TORRENTIAL DOWNPOURS CAPABLE OF PRODUCING LOWLAND AND URBAN FLOODING MAY ALSO ACCOMPANY THIS STORM. THIS STORM IS ACCOMPANIED BY FREQUENT INTENSE LIGHTNING. SEEK SHELTER IN A BUILDING OR CAR. IF OUTSIDE..DO NOT MAKE YOURSELF TALLER THAN YOUR SURROUNDINGS. IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE. ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. WIGGINS
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, May 8, 5:10 PM CDT, 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 505 PM CDT THU MAY 8 1986 ...THUNDERSTORMS MOVE INTO EXTREME SOUTHEAST IOWA... AT 5 PM CDT...THE ADVANCING EDGE OF A LINE OF SHOWERS AND STRONG THUNDERSTORMS HAD REACHED INTO EXTREME SOUTHEAST IOWA FROM NORTH OF OTTUMWA TO KEOKUK. THE STRONGEST WERE JUST WEST OF KEOKUK. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND THUNDER- STORMS THAT COVERED MUCH OF SOUTHERN IOWA AND NORTHEAST MISSOURI. THE STRONG STORMS WERE MOVING NORTHNORTHEAST ABOUT 25 MPH AND ARE LIKELY TO BE ACCOMPANIED BY HEAVY RAIN..SMALL HAIL AND STRONG WIND GUSTS. WIGGINS
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.