Alert archive / Iowa / Tornado Warnings in 2002

Tornado Warning 21, NWS Omaha, NE

August 22, 2002Fremont County, Iowa

NWS Omaha, NE issued this tornado warning at Aug 22, 2002, 9:07 PM CDT for Fremont County, Iowa. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 22, 2002, 9:07 PM CDT (02:07 UTC)
Expired: Aug 22, 2002, 9:30 PM CDT
In force: 23 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Fremont County, IA

The radar

The Omaha radar (KOAX), 92 km from the middle of the area, began a volume at 02:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 22, 7:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 92 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3464 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 11.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

823 
WFUS53 KOAX 230207
TOROMA
IAC071-230230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA NE
906 PM CDT THU AUG 22 2002

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN FREMONT COUNTY IN SOUTHWEST IOWA

* UNTIL 930 PM CDT

* AT 901 PM CDT...RADAR INDICATED A SEVERE STORM WITH A POSSIBLE
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 8 MILES
  WEST OF HAMBURG...OR ABOUT 41 MILES NORTH OF FALLS CITY...MOVING
  EAST AT 15 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  HAMBURG AROUND 925 PM CDT
  RIVERTON AROUND 930 PM CDT

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 4068 9581 4059 9586 4060 9560 4069 9556

SMITH

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 8:23 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	52 min
Aug 22, 8:51 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	39 min
Aug 22, 9:47 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	43 min
Aug 22, 9:58 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	47 min
Aug 23, 12:04 AM CDT	Flash Flood Warning	OAX	Mills	6 hr
Aug 23, 2:47 AM CDT	Flash Flood Warning	OAX	Fremont	6 hr

Nearby

Tornado Warnings in Iowa, 2002 Every tornado warning in 2002 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.