Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 28, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jun 29, 1986, 9:22 PM CDT for Harrison County, Pottawattamie County, Iowa. It was in force for 68 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
- Jun 29, 1986, 9:22 PM CDT (02:22 UTC)
- Expired
- Jun 29, 1986, 10:30 PM CDT
- In force
- 68 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
Counties Harrison County, IA, Pottawattamie 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 |
|---|---|---|---|
| Jun 29, 9:30 PM CDT | Thunderstorm Wind 52 | Harrison, IA | |
| Jun 29, 9:30 PM CDT | Thunderstorm Wind 52 | Harrison, 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 00:00Z, 2.4 hours before the alert went out and 61 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
- 3623 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 262 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 29, 8:53 PM CDT, 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 845 PM CST SUN JUN 29 1986 HEAVY THUNDERSTORMS TO THE NORTHWEST OF OMAHA AND COUNCIL BLUFFS. AT 830 PM CDT HEAVY THUNDERSTORMS STRETCHED THROUGH EAST CENTRAL NEBRASKA ABOUT 70 MILES NORTH OF OMAHA TO NEAR GRAND ISLAND AND WERE MOVING SOUTHEAST ABOUT 35 MPH. CURRENTLY THESE THUNDERSTORMS WERE GENERATING LOCAL HEAVY RAINS AND WINDS TO ABOUT 45 MPH TO THE NORTHWEST OF OMAHA. 70 MPH WINDS WERE REPORTED NEAR COLUMBUS. THESE THUNDERSTORMS COULD REACH THE OMAHA COUNCIL BLUFFS ABOUT 930 PM. THESE THUNDERSTORMS ARE STRONG ENOUGH TO PRODUCE STRONG DAMAGING WINDS AND POSSIBLY HAIL ALONG WITH LOCALLY HEAVY RAINS. THESE THUNDERSTORMS HAVE PRODUCED AS MUCH AS 1.95 INCHES IN AN HOUR IN NORTHEAST NEBRASKA EARLIER. LOCAL FLOODING OF STREETS AND SMALL STREAMS AS THE LINE WORKS THROUGH. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN AND CENTRAL NEBRASKA LUNTIL 2 AM CDT MONDAY MORNING INCLUDING LINCOLN.. COLUMBUS AND THE OMAHA COUNCIL BLUFFS METROPOLITAN AREA. POWERS
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:58 PM CDT | Severe Thunderstorm Warning | OAX | Butler | 57 min |
| Jun 29, 9:08 PM CDT | Tornado Warning | OAX | Butler | 27 min |
| Jun 29, 9:40 PM CDT | Tornado Warning | OAX | Butler | 25 min |
| Jun 29, 10:26 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Seward | 49 min |
| Jun 29, 10:34 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 56 min |
| Jun 29, 11:44 PM CDT | Flash Flood Warning | OAX | Saline | 4 hr |
| Jun 30, 12:47 AM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 58 min |
| Jun 30, 12:51 AM CDT | Severe Thunderstorm Warning | OAX | Jefferson, Saline | 54 min |
| Jun 29, 9:46 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 29 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.