Alert archive / Nebraska / Tornado Warnings in 1996

Tornado Warning 36, NWS Omaha, NE

June 20, 1996Washington County, Nebraska; Harrison County, Iowa

NWS Omaha, NE issued this tornado warning at Jun 20, 1996, 9:43 PM CDT for Washington County, Nebraska; Harrison County, Iowa. It was in force for 47 min. 1 report 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 20, 1996, 9:43 PM CDT (02:43 UTC)
Expired: Jun 20, 1996, 10:30 PM CDT
In force: 47 min
Issued by: NWS Omaha, NE
Area: Whole counties

Counties Harrison County, IA, Washington County, NE

The radar

The Omaha radar (KOAX), 43 km from the middle of the area, began a volume at 02:42 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
Jun 20, 10:01 PM CDT	Thunderstorm Wind 69	Arlington, NE

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, 2.7 hours before the alert went out and 43 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: 2363 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1424 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 276 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 19.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOMA 210242
TOROMA
IAC085-NEC177-210330-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
943 PM CDT THU JUN 20 1996
 
THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1030 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL IOWA
 
   ...HARRISON COUNTY
 
 
IN EAST CENTRAL NEBRASKA
 
   ...WASHINGTON COUNTY
 
AT 943 PM CDT WEATHER SERVICE RADAR SHOWED A POSSIBLE TORNADO JUST WEST
OF BLAIR MOVING EAST AT 20 MPH. AT 932 PM CDT A COOPERATIVE OBSERVER
REPORTED 2 INCH HAIL IN THE TOWN OF BLAIR.
 
 
PEOPLE IN THE WARNED AREA SHOULD MOVE TO A REINFORCED BUILDING ON
THE LOWEST FLOOR TO BE PREPARED FOR THE DESTRUCTIVE WINDS THAT
ACCOMPANY TORNADOES.  IN ADDITION TO THE THREAT OF TORNADOES...
LARGE HAIL...DANGEROUS LIGHTNING AND VERY HEAVY RAIN ARE LIKELY
WITH THIS STORM.
 
 
BYRD
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:01 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton	59 min
Jun 20, 7:10 PM CDT	Tornado Warning	OAX	Burt	35 min
Jun 20, 7:20 PM CDT	Severe Thunderstorm Warning	OAX	Washington	55 min
Jun 20, 7:30 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	30 min
Jun 20, 7:39 PM CDT	Tornado Warning	OAX	Washington	36 min
Jun 20, 7:56 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Dodge	64 min
Jun 20, 8:16 PM CDT	Severe Thunderstorm Warning	OAX	Washington	59 min
Jun 20, 8:27 PM CDT	Tornado Warning	OAX	Dodge	48 min
Jun 20, 8:58 PM CDT	Tornado Warning	OAX	Washington	47 min
Jun 20, 9:00 PM CDT	Flash Flood Warning	OAX	Colfax, Cuming, Dodge	5 hr
Jun 20, 9:14 PM CDT	Tornado Warning	OAX	Dodge	31 min
Jun 20, 9:26 PM CDT	Tornado Warning	OAX	Colfax, Platte	49 min
Jun 20, 9:46 PM CDT	Tornado Warning	OAX	Saunders	44 min
Jun 20, 9:55 PM CDT	Tornado Warning	OAX	Dodge	35 min
Jun 20, 10:03 PM CDT	Tornado Warning	OAX	Douglas	57 min
Jun 20, 10:09 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax	66 min
Jun 20, 10:20 PM CDT	Tornado Warning	OAX	Butler, Saunders	55 min
Jun 20, 10:26 PM CDT	Tornado Warning	OAX	Washington	49 min
Jun 20, 10:55 PM CDT	Tornado Warning	OAX	Douglas	50 min
Jun 20, 11:09 PM CDT	Tornado Warning	OAX	Butler, Saunders	66 min
Jun 20, 11:20 PM CDT	Flash Flood Warning	OAX	Butler, Saunders	6 hr
Jun 20, 11:49 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	56 min
Jun 20, 11:49 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	56 min
Jun 21, 12:26 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	64 min
Jun 21, 12:47 AM CDT	Tornado Warning	OAX	Seward	43 min
Jun 21, 12:52 AM CDT	Tornado Warning	OAX	Cass	68 min
Jun 21, 12:57 AM CDT	Tornado Warning	OAX	Cass	63 min
Jun 21, 1:59 AM CDT	Severe Thunderstorm Warning	OAX	Dodge, Washington	46 min
Jun 21, 2:00 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming	45 min
Jun 21, 3:51 AM CDT	Severe Thunderstorm Warning	OAX	Colfax, Platte	54 min
Jun 20, 9:55 PM CDT	Tornado Warning	OAX	Fremont	35 min
Jun 21, 1:10 AM CDT	Severe Thunderstorm Warning	OAX	Monona	50 min
Jun 21, 2:39 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	51 min
Jun 21, 3:32 AM CDT	Severe Thunderstorm Warning	OAX	Monona	28 min
Jun 21, 4:48 AM CDT	Flash Flood Warning	OAX	Monona	5 hr
Jun 21, 6:20 AM CDT	Flash Flood Warning	OAX	Harrison, Shelby	4 hr
Jun 21, 11:59 AM CDT	Flash Flood Warning	OAX	Harrison	6 hr
Jun 21, 4:11 PM CDT	Flash Flood Warning	OAX	Harrison	6 hr

Nearby

Tornado Warnings in Nebraska, 1996 Tornado Warnings in Iowa, 1996 Every tornado warning in 1996 Tornadoes in 1996

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.