Alert archive / Nebraska / Tornado Warnings in 2002

Tornado Warning 15, NWS Omaha, NE

July 25, 2002Burt County, Nebraska; Monona County, Iowa

NWS Omaha, NE issued this tornado warning at Jul 25, 2002, 4:31 AM CDT for Burt County, Nebraska; Monona County, Iowa. It was in force for 29 min. 2 reports 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: Jul 25, 2002, 4:31 AM CDT (09:31 UTC)
Expired: Jul 25, 2002, 5:00 AM CDT
In force: 29 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Monona County, IA, Burt County, NE

The radar

The Omaha radar (KOAX), 75 km from the middle of the area, began a volume at 09:32 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.

What was reported inside it

Time	Report	Where	Remark
Jul 25, 4:40 AM CDT	Hail 1.75	Decatur, NE	A storm spotter reported hail up to golfball size caused "extreme damage" in town.
Jul 25, 4:45 AM CDT	Hail 2.5	Blencoe, 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 25, 3:05 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.5 hours before the alert went out and 75 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: 735 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 2139 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

119 
WFUS53 KOAX 250931
TOROMA
IAC133-NEC021-251000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA NE
430 AM CDT THU JUL 25 2002

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  BURT COUNTY IN EAST CENTRAL NEBRASKA
  MONONA COUNTY IN WEST CENTRAL IOWA

* UNTIL 500 AM CDT

* AT 428 AM CDT...RADAR INDICATED A SEVERE STORM WITH A POSSIBLE
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 2 MILES
  SOUTHEAST OF DECATUR...OR ABOUT 36 MILES SOUTH OF SIOUX CITY...
  MOVING SOUTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  BLENCOE AROUND 440 AM CDT

AT425 AM CDT TRAINED SPOTTER REPORTED A POSSIBLE TORANDO 4 MILES 
SOUTH OF MACY.

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 4210 9618 4200 9638 4181 9630 4191 9602

WIESE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 10:43 PM CDT	Severe Thunderstorm Warning	OAX	Knox	62 min
Jul 24, 11:35 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	40 min
Jul 24, 11:48 PM CDT	Severe Thunderstorm Warning	OAX	Knox	42 min
Jul 25, 2:11 AM CDT	Severe Thunderstorm Warning	OAX	Douglas	49 min
Jul 25, 2:37 AM CDT	Severe Thunderstorm Warning	OAX	Cass	23 min
Jul 25, 3:00 AM CDT	Severe Thunderstorm Warning	OAX	Otoe	45 min
Jul 25, 3:53 AM CDT	Severe Thunderstorm Warning	OAX	Thurston	37 min
Jul 25, 3:58 AM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy, Washington	62 min
Jul 25, 4:09 AM CDT	Tornado Warning	OAX	Thurston	21 min
Jul 25, 2:33 AM CDT	Severe Thunderstorm Warning	OAX	Monona	42 min
Jul 25, 3:09 AM CDT	Severe Thunderstorm Warning	OAX	Harrison	51 min
Jul 25, 4:25 AM CDT	Severe Thunderstorm Warning	OAX	Montgomery	35 min
Jul 25, 4:38 AM CDT	Severe Thunderstorm Warning	OAX	Mills	37 min
Jul 25, 4:50 AM CDT	Severe Thunderstorm Warning	OAX	Harrison	40 min
Jul 25, 4:56 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	64 min
Jul 25, 5:00 AM CDT	Severe Thunderstorm Warning	OAX	Montgomery	30 min
Jul 25, 5:31 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	44 min
Jul 25, 6:28 AM CDT	Severe Thunderstorm Warning	OAX	Page	47 min

Nearby

Tornado Warnings in Nebraska, 2002 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.