Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 12, NWS North Platte, NE

May 7, 2002Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 7, 2002, 12:18 AM CDT for Custer County, Nebraska. It was in force for 42 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: May 7, 2002, 12:18 AM CDT (05:18 UTC)
Expired: May 7, 2002, 1:00 AM CDT
In force: 42 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Custer County, NE

What was reported inside it

Time	Report	Where	Remark
May 7, 1:00 AM CDT	Hail 1.75	Arnold, NE
May 7, 1:05 AM CDT	Hail 0.88	Callaway, 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, 5.3 hours before the alert went out and 54 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: 128 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 3296 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 070518
SVRLBF
NEC041-070600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1218 AM CDT TUE MAY 7 2002

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CUSTER COUNTY IN CENTRAL NEBRASKA...

* UNTIL 100 AM CDT...

* AT 1216 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM 19 MILES SOUTHWEST
  OF CALLAWAY MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE...

  3 MILES SOUTHEAST OF CALLAWAY AROUND 1250 AM CDT...

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER IN A SMALL
INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST
PROTECTION.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4141 10021 4106 10019 4106 9965 4142 9967

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 11:33 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	42 min
May 6, 11:39 PM CDT	Severe Thunderstorm Warning	LBF	Hayes	36 min
May 7, 12:02 AM CDT	Severe Thunderstorm Warning	LBF	Lincoln	43 min
May 7, 12:46 AM CDT	Severe Thunderstorm Warning	LBF	Lincoln	44 min
May 7, 12:56 AM CDT	Severe Thunderstorm Warning	LBF	Custer	49 min
May 7, 2:04 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha	56 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002 Every severe thunderstorm warning 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.