Alert archive / Nebraska / Tornado Warnings in 1998

Tornado Warning 39, NWS Omaha, NE

June 17, 1998Boone County, Nebraska

NWS Omaha, NE issued this tornado warning at Jun 17, 1998, 8:30 PM CDT for Boone County, Nebraska. It was in force for 35 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 17, 1998, 8:30 PM CDT (01:30 UTC)
Expired: Jun 17, 1998, 9:05 PM CDT
In force: 35 min
Issued by: NWS Omaha, NE
Area: Whole counties

County Boone County, NE

What was reported inside it

Time	Report	Where	Remark
Jun 17, 8:55 PM CDT	Hail 1.75	Petersburg, NE	Hail shredded crops.

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
Jun 17, 6:15 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 148 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: 3449 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1514 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 11.9

Open this sounding in Storm Lab

The text

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

930 
WFUS1 KOMA 180131 RRA
TOROMA
NEC011-180205-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
830 PM CDT WED JUN 17 1998

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN BOONE COUNTY IN NORTHEASTERN NEBRASKA

* UNTIL 905 PM CDT

* AT 829 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A POSSIBLE TORNADO 42 MILES WEST SOUTHWEST OF NORFOLK OR 5 MILES
  WEST SOUTHWEST OF PETERSBURG MOVING NORTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  PETERSBURG                   AT 835 PM CDT
  RAEVILLE                     AT 845 PM CDT

IF YOU ARE IN THE WARNED AREA...TAKE SHELTER IN A BASEMENT IF ONE
IS AVAILABLE.  OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.  CARS AND MOBILE HOMES SHOULD BE ABANDONED.

ZAPOTOCNY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:59 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	61 min
Jun 17, 8:45 PM CDT	Tornado Warning	OAX	Antelope	35 min
Jun 17, 9:04 PM CDT	Severe Thunderstorm Warning	OAX	Boone	61 min
Jun 17, 9:04 PM CDT	Severe Thunderstorm Warning	OAX	Boone	66 min
Jun 17, 9:23 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	32 min
Jun 17, 10:19 PM CDT	Flash Flood Warning	OAX	Boone	3 hr
Jun 17, 10:33 PM CDT	Flash Flood Warning	OAX	Boone, Madison, Platte	6 hr
Jun 17, 10:46 PM CDT	Severe Thunderstorm Warning	OAX	Madison	64 min
Jun 17, 10:52 PM CDT	Tornado Warning	OAX	Madison	58 min

Nearby

Tornado Warnings in Nebraska, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.