Alert archive / Iowa / Tornado Warnings in 2002
Tornado Warning 1, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Apr 17, 2002, 8:42 PM CDT for Harrison County, Shelby County, Iowa. It was in force for 33 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 17, 2002, 8:42 PM CDT (01:42 UTC)
- Expired
- Apr 17, 2002, 9:15 PM CDT
- In force
- 33 min
- Issued by
- NWS Omaha, NE
- Area
- Counties, with a storm outline in the text
Counties Harrison County, IA, Shelby County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 17, 8:48 PM CDT | Hail 1 | Woodbine, IA | After the tornado southwest of Woodbine lifted, it was still producing large hail. |
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.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.7 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
- 72 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 2122 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 361 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KOAX 180142 TOROMA IAC085-165-180215- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA NE 842 PM CDT WED APR 17 2002 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * TORNADO WARNING FOR... HARRISON COUNTY IN SOUTHWEST IOWA SHELBY COUNTY IN SOUTHWEST IOWA * UNTIL 915 PM CDT * AT 839 PM CDT...RADAR INDICATED A SEVERE STORM WITH A DEVELOPING TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 2 MILES NORTH OF LOGAN...OR ABOUT 30 MILES NORTH OF OMAHA...MOVING NORTHEAST AT 20 MPH. * SOME LOCATIONS AFFECTED... WOODBINE DUNLAP THIS REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED FOR THE WARNED AREA. IF YOU ARE IN THE PATH OF A TORNADO...GO TO A BASEMENT. IF A BASEMENT IS NOT AVAILABLE...TAKE COVER IN AN INTERIOR ROOM ON THE LOWEST LEVEL OF YOUR HOME OR BUSINESS. AVOID WINDOWS. LAT...LON 4168 9595 4156 9578 4180 9541 4196 9562 GRIFFIS
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 7:39 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 51 min |
| Apr 17, 8:29 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 31 min |
| Apr 17, 9:13 PM CDT | Tornado Warning | OAX | Shelby | 32 min |
| Apr 17, 9:45 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 15 min |
| Apr 18, 4:51 PM CDT | Severe Thunderstorm Warning | OAX | Page | 24 min |
| Apr 18, 5:02 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery | 18 min |
Nearby
Tornado Warnings in Iowa, 2002Every tornado warning in 2002Tornadoes in 2002
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.