Alert archive / Nebraska / Tornado Warnings in 2017

Tornado Warning 16, NWS North Platte, NE

August 19, 2017Loup County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 19, 2017, 7:39 PM CDT for Loup County, Nebraska. It was in force for 51 min. 5 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 19, 2017, 7:39 PM CDT (00:39 UTC)
Expired: Aug 19, 2017, 8:30 PM CDT
In force: 51 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Loup County, NE

The radar

The North Platte radar (KLNX), 88 km from the middle of the area, began a volume at 00:40 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 19, 7:40 PM CDT	TORNADO	10 Nw Almeria, NE
Aug 19, 7:48 PM CDT	TORNADO	5 Nw Almeria, NE
Aug 19, 8:02 PM CDT	TORNADO	4 Nw Almeria, NE	FLIPPED SHED AND TREE DAMAGE IN LINE WITH OTHER TORNADO DAMAGE
Aug 19, 8:03 PM CDT	TORNADO	3 Wnw Almeria, NE	TORNADO DAMAGE. LARGE BRANCHES MISSING, SOME UPROOTED, DEBARKED SOFTWOOD TREES
Aug 19, 8:27 PM CDT	HAIL 2.5	4 W Almeria, NE	BROKEN WINDOWS, HOLES IN VINYL SIDING, AND STRIPPED HAIL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 19, 5:45 PM CDT	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 126 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: 2449 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 2367 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

As transmitted.

297 
WFUS53 KLBF 200039
TORLBF
NEC115-200130-
/O.NEW.KLBF.TO.W.0016.170820T0039Z-170820T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service North Platte NE
739 PM CDT SAT AUG 19 2017

The National Weather Service in North Platte has issued a

* Tornado Warning for...
  Central Loup County in north central Nebraska...

* Until 830 PM CDT
    
* At 739 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 13 miles east of Brewster, moving east at 20 mph.

  HAZARD...Tornado and ping pong ball 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
  central Loup County, including the following locations: Almeria
  Meadow State Wildlife Management Area, Valley View Flat Campground,
  Horseshoe Bend Lake and Hannamon Bayou Campground.

This includes Highway 183 between mile markers 131 and 143.
 
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 4183 9964 4195 9969 4207 9933 4189 9927
TIME...MOT...LOC 0039Z 258DEG 16KT 4191 9961 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Roberg

1 follow-up statement

593 
WWUS53 KLBF 200053
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
753 PM CDT SAT AUG 19 2017

NEC115-200130-
/O.CON.KLBF.TO.W.0016.000000T0000Z-170820T0130Z/
Loup NE-
753 PM CDT SAT AUG 19 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR CENTRAL
LOUP COUNTY...
    
At 753 PM CDT, a severe thunderstorm capable of producing a tornado
was located 12 miles northwest of Taylor, moving southeast at 15 mph.

HAZARD...Tornado and two inch 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. 

Locations impacted include...
Almeria Meadow State Wildlife Management Area, Valley View Flat
Campground, Horseshoe Bend Lake and Hannamon Bayou Campground.

This includes Highway 183 between mile markers 131 and 143.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4183 9964 4195 9969 4207 9933 4189 9927
TIME...MOT...LOC 0053Z 307DEG 13KT 4189 9957 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 7:14 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Loup, Rock	46 min
Aug 19, 7:54 PM CDT	Flash Flood Warning	LBF	Blaine, Loup, Rock	6 hr
Aug 19, 8:02 PM CDT	Tornado Warning	LBF	Loup	43 min
Aug 19, 8:44 PM CDT	Severe Thunderstorm Warning	LBF	Custer	61 min
Aug 19, 8:48 PM CDT	Severe Thunderstorm Warning	LBF	Loup	27 min
Aug 19, 9:01 PM CDT	Tornado Warning Tornado observed	LBF	Custer	29 min
Aug 19, 9:20 PM CDT	Flash Flood Warning	LBF	Custer, Loup	6 hr
Aug 19, 9:45 PM CDT	Severe Thunderstorm Warning	LBF	Custer	45 min
Aug 19, 10:20 PM CDT	Special Weather Statement	LBF	Loup	40 min
Aug 19, 10:40 PM CDT	Special Weather Statement	LBF	Custer	50 min

Nearby

Tornado Warnings in Nebraska, 2017 Every tornado warning in 2017 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.