Alert archive / Iowa / Tornado Warnings in 1986
Tornado Warning 12, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jul 30, 1986, 11:26 PM CDT for Montgomery County, Iowa. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Jul 30, 1986, 11:26 PM CDT (04:26 UTC)
- Expired
- Jul 31, 1986, 12:00 AM CDT
- In force
- 34 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Montgomery 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, 4.4 hours before the alert went out and 107 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
- 3632 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 118 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 310426 TOROMA IAC137-310500- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA NE 1126 PM CDT WED JUL 30 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1200 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...EASTERN MONTGOMERY AT 1125 PM RADAR INDICATED A POSSIBLE TORNADO NEAR ELLIOTT IOWA ABOUT 40 MILES EASTSOUTHEAST OF OMAHA. THE STORM WAS MOVING SOUTHEAST AT 15 MPH. 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 ABANDONED. IF YOU ARE CAUGHT IN THE OPEN..TRY TO HIDE IN A DEPRESSION LIKE A DITCH OR CULVERT. GAVERS
What forecasters said that day
The local office's own words before this tornado 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 30, 7:09 PM CDT, 4 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 705 PM CDT WED JUL 30 1986 SEVERE THUNDERSTORM WATCH NUMBER 434 REMAINS IN EFFECT FOR PARTS OF EASTERN NEBRASKA UNTIL 10 PM CDT TONIGHT. AT 7PM CDT THUNDERSTORMS WERE OCCURRING IN NORTHERN MISSOURI AND SOUTHERN IOWA BUT NO STORMS HAD DEVELOPED IN EASTERN NEBRASKA. IT NOW APPEARS DOUBTFUL THAT SEVERE WEATHER WILL DEVELOP IN EASTERN NEBRASKA THIS EVENING..THE WATCH WILL LIKELY BE CANCELLED WITHIN ONE TO TWO HOURS. GAVERS
Special weather statement, Jul 30, 10:41 PM CDT, 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 1040 PM CDT WED JUL 30 1986 INTENSE THUNDERSTORMS HAVE DEVELOPED IN POTTAWATTAMIE COUNTY OF SOUTHWEST IOWA. THE STORMS WERE CENTERED BETWEEN OAKLAND AND HANCOCK.. ABOUT 30 MILES EAST OF OMAHA. GUSTY WINDS..HAIL..DANGEROUS LIGHTNING AND HEAVY RAINS CAN BE EXPECTED WITH THESE STORMS UNTIL AROUND 1130 PM CDT TONIGHT. GAVERS
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 10:54 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 66 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; the sounding from the Mesonet's radiosonde archive.