Alert archive / Iowa / Tornado Warnings in 2000

Tornado Warning 21, NWS Omaha, NE

June 13, 2000Harrison County, Shelby County, Iowa

NWS Omaha, NE issued this tornado warning at Jun 13, 2000, 3:20 PM CDT for Harrison County, Shelby County, Iowa. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jun 13, 2000, 3:20 PM CDT (20:20 UTC)
Expired: Jun 13, 2000, 4:00 PM CDT
In force: 40 min
Issued by: NWS Omaha, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Harrison County, IA, Shelby County, IA

The radar

The Omaha radar (KOAX), 59 km from the middle of the area, began a volume at 20:19 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
Jun 13, 11:45 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 13, 2:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.3 hours before the alert went out and 59 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: 997 J/kg
Mixed-layer CIN: -254 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KOAX 132021
TOROMA
IAC085-165-132100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA NE
320 PM CDT TUE JUN 13 2000

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  HARRISON COUNTY IN SOUTHWEST IOWA
  SHELBY COUNTY IN SOUTHWEST IOWA

* UNTIL 400 PM CDT

* AT 314 PM CDT...RADAR AND SPOTTERS INDICATED A THUNDERSTORM WITH   
  STRONG ROTATION AND A POSSIBLE TORNADO 8 MILES SOUTHEAST OF        
  MISSOURI VALLEY...OR   ABOUT 22 MILES NORTHEAST OF                 
  OMAHA...MOVING NORTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  LOGAN AROUND 325 PM CDT
  PERSIA AROUND 335 PM CDT
  PORTSMOUTH...TENNANT AROUND 350 PM CDT
  EARLING...HARLAN AROUND 400 PM CDT

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT TUESDAY EVENING 
FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.  THIS REPLACES THE 
PREVIOUSLY ISSUED SEVERE THUNDERSTORM WARNING FOR HARRISON COUNTY.

LAT...LON 4154 9592 4144 9577 4164 9528 4187 m9554

BYRD

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 2:02 PM CDT	Tornado Warning	OAX	Pottawattamie	43 min
Jun 13, 2:28 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	62 min
Jun 13, 2:45 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	45 min
Jun 13, 3:17 PM CDT	Tornado Warning	OAX	Mills	28 min
Jun 13, 3:30 PM CDT	Tornado Warning	OAX	Fremont	45 min
Jun 13, 3:45 PM CDT	Tornado Warning	OAX	Mills	30 min
Jun 13, 4:11 PM CDT	Tornado Warning	OAX	Mills, Montgomery, Pottawattamie	34 min
Jun 13, 4:11 PM CDT	Tornado Warning	OAX	Fremont, Page	34 min
Jun 13, 4:37 PM CDT	Tornado Warning	OAX	Montgomery	23 min
Jun 13, 4:44 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	46 min
Jun 13, 5:08 PM CDT	Tornado Warning	OAX	Montgomery	37 min
Jun 13, 5:21 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	54 min
Jun 13, 5:33 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	57 min
Jun 13, 5:52 PM CDT	Flash Flood Warning	OAX	Mills	4 hr
Jun 13, 6:18 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	57 min

Nearby

Tornado Warnings in Iowa, 2000 Every tornado warning in 2000 Tornadoes in 2000

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.