Alert archive / Nebraska / Tornado Warnings in 2017
Tornado Warning 13, NWS North Platte, NE
NWS North Platte, NE issued this tornado warning at Aug 12, 2017, 6:44 PM MDT for Perkins County, Nebraska. It was in force for 17 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
- Aug 12, 2017, 6:44 PM MDT (00:44 UTC)
- Expired
- Aug 12, 2017, 7:01 PM MDT
- In force
- 17 min
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Perkins County, NE
The radar
The North Platte radar (KLNX), 161 km from the middle of the area, began a volume at 00:48 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 |
|---|---|---|---|
| Aug 12, 2:59 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.7 hours before the alert went out and 117 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
- 815 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1218 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 6.6
The text
As transmitted.
630
WFUS53 KLBF 130044
TORLBF
NEC135-130115-
/O.NEW.KLBF.TO.W.0013.170813T0044Z-170813T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service North Platte NE
644 PM MDT SAT AUG 12 2017
The National Weather Service in North Platte has issued a
* Tornado Warning for...
Northwestern Perkins County in southwestern Nebraska...
* Until 715 PM MDT
* At 644 PM MDT, a severe thunderstorm capable of producing a tornado
was located 8 miles southeast of Big Springs, moving southeast at
10 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Weather spotters reported funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This tornadic thunderstorm will remain over mainly rural areas of
northwestern Perkins County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4100 10205 4101 10199 4100 10196 4090 10178
4083 10205
TIME...MOT...LOC 0044Z 304DEG 9KT 4096 10199
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
CDC2 follow-up statements
956
WWUS53 KLBF 130054
SVSLBF
Severe Weather Statement
National Weather Service North Platte NE
654 PM MDT SAT AUG 12 2017
NEC135-130115-
/O.CON.KLBF.TO.W.0013.000000T0000Z-170813T0115Z/
Perkins NE-
654 PM MDT SAT AUG 12 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
NORTHWESTERN PERKINS COUNTY...
At 654 PM MDT, a severe thunderstorm capable of producing a tornado
was located 10 miles south of Brule, or 11 miles northwest of Grant,
moving east at 25 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
northwestern Perkins County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4100 10196 4090 10178 4085 10196
TIME...MOT...LOC 0054Z 274DEG 22KT 4095 10189
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
CDC649
WWUS53 KLBF 130101
SVSLBF
Severe Weather Statement
National Weather Service North Platte NE
701 PM MDT SAT AUG 12 2017
NEC135-130111-
/O.CAN.KLBF.TO.W.0013.000000T0000Z-170813T0115Z/
Perkins NE-
701 PM MDT SAT AUG 12 2017
...THE TORNADO WARNING FOR NORTHWESTERN PERKINS COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
A severe thunderstorm watch remains in effect until 1100 PM MDT for
southwestern Nebraska.
LAT...LON 4100 10196 4090 10178 4085 10196
TIME...MOT...LOC 0059Z 304DEG 9KT 4094 10187
$$
CDCThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:00 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 45 min |
| Aug 12, 6:05 PM MDT | Tornado Warning | LBF | Custer | 25 min |
| Aug 12, 6:14 PM MDT | Severe Thunderstorm Warning | LBF | Loup, Rock | 31 min |
| Aug 12, 6:23 PM MDT | Special Weather Statement | LBF | Keith, Lincoln | 52 min |
| Aug 12, 6:25 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 50 min |
| Aug 12, 6:40 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 50 min |
| Aug 12, 6:52 PM MDT | Special Weather Statement | LBF | Hayes | 53 min |
| Aug 12, 7:06 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 39 min |
| Aug 12, 7:08 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 52 min |
| Aug 12, 7:13 PM MDT | Areal Flood Advisory | LBF | Lincoln | 2 hr |
| Aug 12, 7:15 PM MDT | Areal Flood Advisory | LBF | Custer | 2 hr |
| Aug 12, 7:18 PM MDT | Special Weather Statement | LBF | Loup | 42 min |
| Aug 12, 7:23 PM MDT | Flash Flood Warning | LBF | Hayes | 6 hr |
| Aug 12, 7:30 PM MDT | Areal Flood Advisory | LBF | Custer | 2 hr |
| Aug 12, 7:37 PM MDT | Areal Flood Advisory | LBF | Custer | 113 min |
| Aug 12, 7:41 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 12, 7:50 PM MDT | Special Weather Statement | LBF | Loup | 40 min |
| Aug 12, 7:53 PM MDT | Special Weather Statement | LBF | Lincoln | 52 min |
| Aug 12, 8:08 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 39 min |
| Aug 12, 8:19 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Custer, Loup | 41 min |
| Aug 12, 8:24 PM MDT | Flash Flood Warning | LBF | Custer | 6 hr |
| Aug 13, 6:09 AM MDT | Dense Fog Advisory | LBF | Chase, Deuel, Frontier, Hayes, Keith, Lincoln and 1 more | 3 hr |
| Aug 13, 3:17 PM MDT | Special Weather Statement | LBF | Blaine | 43 min |
| Aug 13, 3:33 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Custer | 42 min |
| Aug 13, 3:37 PM MDT | Special Weather Statement | LBF | Logan | 38 min |
| Aug 13, 3:56 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 13, 3:58 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Loup | 47 min |
| Aug 13, 4:02 PM MDT | Flash Flood Warning | LBF | Custer | 6 hr |
| Aug 13, 4:28 PM MDT | Special Weather Statement | LBF | Perkins | 47 min |
| Aug 13, 4:37 PM MDT | Special Weather Statement | LBF | Logan | 38 min |
| Aug 13, 4:40 PM MDT | Special Weather Statement | LBF | Loup | 50 min |
| Aug 13, 4:43 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 47 min |
| Aug 13, 4:56 PM MDT | Special Weather Statement | LBF | Loup | 49 min |
| Aug 13, 5:02 PM MDT | Special Weather Statement | LBF | Logan | 43 min |
| Aug 13, 5:23 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 52 min |
| Aug 13, 5:26 PM MDT | Special Weather Statement | LBF | Loup | 49 min |
| Aug 13, 5:30 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 45 min |
| Aug 13, 5:32 PM MDT | Flash Flood Warning | LBF | Custer | 8 hr |
| Aug 13, 5:39 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 51 min |
| Aug 13, 5:44 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Loup | 46 min |
| Aug 13, 5:49 PM MDT | Special Weather Statement | LBF | Boyd | 41 min |
Nearby
Tornado Warnings in Nebraska, 2017Every tornado warning in 2017Tornadoes in 2017
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.