Alert archive / Iowa / Tornado Warnings in 1986
Tornado Warning 7, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at May 12, 1986, 5:36 PM CDT for Mills County, Iowa. It was in force for 39 min. 2 reports 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 12, 1986, 5:36 PM CDT (22:36 UTC)
- Expired
- May 12, 1986, 6:15 PM CDT
- In force
- 39 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Mills 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 12, 6:00 PM CDT | Hail 2 | Mills, IA | |
| May 12, 6:15 PM CDT | Hail 1.75 | Mills, 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
Omaha, NE (KOAX), launched 12:00Z, 10.6 hours before the alert went out and 70 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
- 3615 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 138 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 KOMA 122236 TOROMA IAC129-122315- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA NE 536 PM CDT MON MAY 12 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 615 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...NORTHERN MILLS AT 535PM A POSSIBLE TORNADO WAS INDICATED ON RADAR ABOUT 10 MILES SOUTHEAST OF OMAHA. THE STORM WAS MOVING EAST AT 15 MPH. SIMILAR STORMS HAVE PRODUCED NUMEROUS FUNNEL CLOUDS AND LARGE HAIL. PERSONS IN THE WARNED AREA SHOULD TAKE SHELTER IN A BASEMENT IF AVAILABLE. OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. CARS AND MOBILE HOMES SHOULD BE ABAND;ONED. IF YOU ARE CAUGHT IN THE OPEN..TRY TO HIDE IN A DEPRESSION LIKE A DITCH OR CULVERT. DAMAGE REPORTS OR OBSERVED SEVERE WEATHER SHOULD BE GIVEN TO A LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. GAVERS
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 5:07 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 68 min |
| May 12, 5:15 PM CDT | Tornado Warning | OAX | Pottawattamie | 30 min |
| May 12, 5:50 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 55 min |
| May 12, 6:05 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 55 min |
| May 12, 6:10 PM CDT | Tornado Warning | OAX | Harrison | 35 min |
| May 12, 6:30 PM CDT | Tornado Warning | OAX | Mills | 30 min |
| May 12, 6:45 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 60 min |
| May 12, 6:59 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 61 min |
Nearby
Tornado Warnings in Iowa, 1986Every tornado warning in 1986Tornadoes 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.