Alert archive / Nebraska / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 9, NWS North Platte, NE

April 18, 2004Loup County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 18, 2004, 6:32 PM CDT for Loup County, Nebraska. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 18, 2004, 6:32 PM CDT (23:32 UTC)
Expired: Apr 18, 2004, 7:00 PM CDT
In force: 28 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Loup County, NE

The radar

The North Platte radar (KLNX), 90 km from the middle of the area, began a volume at 23:31 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 18, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.5 hours before the alert went out and 129 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: 4 J/kg
Mixed-layer CIN: -439 J/kg
Mixed-layer LCL: 2590 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

806 
WUUS53 KLBF 182332
SVRLBF
NEC115-190000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
632 PM CDT SUN APR 18 2004

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LOUP COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 700 PM CDT

* AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED 6 MILES NORTH OF
  TAYLOR...AND MOVING EAST AT 40 MPH.

LAT...LON 4207 9965 4176 9966 4175 9924 4207 9926

$$

POWER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 2:37 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Keya Paha, Rock	53 min
Apr 18, 3:07 PM CDT	Severe Thunderstorm Warning	LBF	Holt	53 min
Apr 18, 3:43 PM CDT	Severe Thunderstorm Warning	LBF	Boyd	62 min
Apr 18, 3:59 PM CDT	Severe Thunderstorm Warning	LBF	Holt	31 min
Apr 18, 5:57 PM CDT	Severe Thunderstorm Warning	LBF	Custer	33 min
Apr 18, 6:16 PM CDT	Severe Thunderstorm Warning	LBF	Loup	14 min
Apr 18, 6:40 PM CDT	Severe Thunderstorm Warning	LBF	Garfield	35 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2004 Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.