Alert archive / Nebraska / Tornado Warnings in 2001

Tornado Warning 26, NWS North Platte, NE

July 17, 2001Loup County, Nebraska

NWS North Platte, NE issued this tornado warning at Jul 17, 2001, 6:08 PM CDT for Loup County, Nebraska. It was in force for 52 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jul 17, 2001, 6:08 PM CDT (23:08 UTC)
Expired: Jul 17, 2001, 7:00 PM CDT
In force: 52 min
Issued by: NWS North Platte, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Loup County, NE

The radar

The North Platte radar (KLNX), 101 km from the middle of the area, began a volume at 23:09 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
Jul 17, 6:20 PM CDT	Hail 1.25	Rose, NE
Jul 17, 7:10 PM CDT	Hail 1.75	Burwell, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 17, 5:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.1 hours before the alert went out and 132 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: 727 J/kg
Mixed-layer CIN: -340 J/kg
Mixed-layer LCL: 2212 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLBF 172311
TORLBF

NEC115-180000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
608 PM CDT TUE JUL 17 2001

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN AND EASTERN LOUP COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 700 PM CDT

* AT 559 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO OVER EXTREME SOUTH CENTRAL
  ROCK COUNTY...OR ABOUT 24 MILES NORTHEAST OF BREWSTER...MOVING
  SOUTH AT 10 MPH.

* THE TORNADO IS EXPECTED TO BE...
  OVER FARM AND RANGELANDS ALONG AND EAST OF HIGHWAY 183.
  NEAR CALAMUS RESERVOIR ABOUT 650 PM CDT.

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING 
SITUATION. TAKE COVER IMMEDIATELY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT TUESDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4187 9946 4178 9939 4178 9924 4207 9924W
          4208 9963
$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 7:45 PM CDT	Severe Thunderstorm Warning	LBF	Holt	30 min
Jul 16, 9:16 PM CDT	Severe Thunderstorm Warning	LBF	Wheeler	29 min
Jul 17, 1:05 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	40 min
Jul 17, 1:28 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Keya Paha	62 min
Jul 17, 5:09 PM CDT	Severe Thunderstorm Warning	LBF	Rock	66 min
Jul 17, 5:51 PM CDT	Tornado Warning	LBF	Rock	24 min
Jul 17, 6:16 PM CDT	Severe Thunderstorm Warning	LBF	Rock	29 min
Jul 17, 6:34 PM CDT	Severe Thunderstorm Warning	LBF	Holt	56 min
Jul 17, 6:56 PM CDT	Severe Thunderstorm Warning	LBF	Garfield	64 min

Nearby

Tornado Warnings in Nebraska, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.