Alert archive / Nebraska / Tornado Warnings in 1999

Tornado Warning 21, NWS Hastings, NE

May 2, 1999Greeley County, Sherman County, Valley County, Nebraska

NWS Hastings, NE issued this tornado warning at May 2, 1999, 8:05 PM CDT for Greeley County, Sherman County, Valley County, Nebraska. It was in force for 40 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: May 2, 1999, 8:05 PM CDT (01:05 UTC)
Expired: May 2, 1999, 8:45 PM CDT
In force: 40 min
Issued by: NWS Hastings, NE
Area: Whole counties

Counties Greeley County, NE, Sherman County, NE, Valley County, NE

The radar

The Grand Island radar (KUEX), 130 km from the middle of the area, began a volume at 01:04 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
May 2, 8:17 PM CDT	Hail 1.75	Spalding, 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 hours before the alert went out and 152 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: 114 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRI 030107 RRB
TORGRI
NEC077-163-175-030145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
805 PM CDT SUN MAY 2 1999

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* TORNADO WARNING FOR PEOPLE IN...
  EXTREME SOUTHWESTERN GREELEY COUNTY IN CENTRAL NEBRASKA
  NORTHERN SHERMAN COUNTY IN CENTRAL NEBRASKA
  SOUTHEASTERN VALLEY COUNTY IN CENTRAL NEBRASKA

* UNTIL 845 PM CDT

* AT 805 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 38 MILES EAST OF BROKEN BOW...OR 4 MILES
  NORTHEAST OF LOUP CITY...MOVING NORTHEAST AT 20 MPH.

* TORNADO IS EXPECTED TO BE NEAR...
  NORTH LOUP AT 845 PM CDT

LOUP CITY AND NORTH LOUP ARE IN THE PDATH OF THIS TORNADO.

TAKE SHELTER IMMEDIATELY IN A BASEMENT OR GO TO A SMALL INTERIOR ROOM
ON THE LOWEST FLOOR. GET UNDER A STURDY PIECE OF FURNITURE AND COVER
YOUR HEAD WITH A BLANKET OR PILLOW. STAY AWAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 7:07 PM CDT	Tornado Warning	GID	Adams, Hall	53 min
May 2, 7:13 PM CDT	Tornado Warning	GID	Howard	47 min
May 2, 7:24 PM CDT	Severe Thunderstorm Warning	GID	Sherman	36 min
May 2, 8:02 PM CDT	Tornado Warning	GID	Howard	43 min
May 2, 8:05 PM CDT	Tornado Warning	GID	Merrick, Nance	40 min
May 2, 8:23 PM CDT	Tornado Warning	GID	Clay	22 min

Nearby

Tornado Warnings in Nebraska, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.