Alert archive / Nebraska / Tornado Warnings in 2002
Tornado Warning 12, NWS North Platte, NE
NWS North Platte, NE issued this tornado warning at Aug 11, 2002, 7:23 PM CDT for Blaine County, Nebraska. It was in force for 37 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
- Aug 11, 2002, 7:23 PM CDT (00:23 UTC)
- Expired
- Aug 11, 2002, 8:00 PM CDT
- In force
- 37 min
- Issued by
- NWS North Platte, NE
- Area
- Counties, with a storm outline in the text
County Blaine County, NE
The radar
The North Platte radar (KLNX), 39 km from the middle of the area, began a volume at 00:24 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 |
|---|---|---|---|
| Aug 11, 7:50 PM CDT | Hail 1.75 | Dunning, NE | |
| Aug 11, 8:09 PM CDT | Hail 1.75 | Dunning, 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 |
|---|---|---|---|
| Aug 11, 3:35 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.4 hours before the alert went out and 100 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.
- Mixed-layer CAPE
- 1798 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 2882 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.0
The text
As transmitted, in the capitals the NWS used until 2016.
810 WFUS53 KLBF 120023 TORLBF NEC009-120100- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 723 PM CDT SUN AUG 11 2002 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * TORNADO WARNING FOR... WESTERN BLAINE COUNTY IN NORTH CENTRAL NEBRASKA * UNTIL 800 PM CDT... * AT 719 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM WITH STRONG ROTATION 9 MILES NORTHWEST OF DUNNING...OR ABOUT 18 MILES EAST OF THEDFORD...MOVING SOUTHEAST AT 5 MPH. THIS STORM IS CAPABLE OF PRODUCING A TORNADO AT ANY TIME. * THE DEVELOPING TORNADO IS EXPECTED TO BE... 4 MILES NORTHWEST OF DUNNING AROUND 800 PM CDT... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR WESTERN NEBRASKA. LAT...LON 4207 10025 4176 10025 4175 9995 4207 9981
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:44 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 61 min |
| Aug 11, 8:01 PM CDT | Tornado Warning | LBF | Blaine | 29 min |
| Aug 11, 8:33 PM CDT | Severe Thunderstorm Warning | LBF | Blaine | 27 min |
| Aug 11, 8:47 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 58 min |
| Aug 11, 9:49 PM CDT | Severe Thunderstorm Warning | LBF | Brown, Keya Paha, Rock | 56 min |
| Aug 11, 10:28 PM CDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 62 min |
| Aug 11, 10:34 PM CDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 56 min |
Nearby
Tornado Warnings in Nebraska, 2002Every tornado warning in 2002Tornadoes 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; radar from the NEXRAD Level II archive.