Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS North Platte, NE

April 30, 2018Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 30, 2018, 8:14 PM CDT for Custer County, Nebraska. It was in force for 46 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: Apr 30, 2018, 8:14 PM CDT (01:14 UTC)
Expired: Apr 30, 2018, 9:00 PM CDT
In force: 46 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Custer County, NE

The radar

The North Platte radar (KLNX), 109 km from the middle of the area, began a volume at 01:13 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
Apr 30, 8:15 PM CDT	HAIL 1	5 Sw Sargent, NE
Apr 30, 8:32 PM CDT	HAIL 1.5	Weissert, NE	HAIL COVERING THE GROUND.
Apr 30, 8:41 PM CDT	HAIL 1	11 Ne Broken Bow, NE	PEA TO QUARTER SIZE HAIL.
Apr 30, 8:49 PM CDT	HAIL 1	5 S Sargent, NE
Apr 30, 8:53 PM CDT	HAIL 1	2 W Comstock, NE	COVERING THE GROUND.

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
Apr 30, 5:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.2 hours before the alert went out and 115 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: 67 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 2671 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

790 
WUUS53 KLBF 010114
SVRLBF
NEC041-010200-
/O.NEW.KLBF.SV.W.0013.180501T0114Z-180501T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
814 PM CDT MON APR 30 2018

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Custer County in central Nebraska...

* Until 900 PM CDT

* At 813 PM CDT, a severe thunderstorm was located near Weissert, or
  14 miles northeast of Broken Bow, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will be near, 
  Sargent around 820 PM CDT. 
  Comstock around 825 PM CDT. 

Other locations impacted by this severe thunderstorm include Round
Valley, Divide Hill, Wescott and Big Oak Canyon.

This includes Highway 183 between mile markers 103 and 121.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4143 9946 4158 9959 4174 9941 4174 9922
      4165 9921 4153 9921
TIME...MOT...LOC 0113Z 226DEG 36KT 4156 9944 

HAIL...1.00IN
WIND...60MPH
 
$$

Taylor

1 follow-up statement

333 
WWUS53 KLBF 010147
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
847 PM CDT MON APR 30 2018

NEC041-010200-
/O.CON.KLBF.SV.W.0013.000000T0000Z-180501T0200Z/
Custer NE-
847 PM CDT MON APR 30 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHEASTERN CUSTER COUNTY...

At 844 PM CDT, a severe thunderstorm was located near Comstock, or 15
miles south of Taylor, moving northeast at 45 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings. 

This severe thunderstorm will remain over mainly rural areas of 
northeastern Custer County, including the following locations: Round 
Valley, Divide Hill, Wescott and Big Oak Canyon.

This includes Highway 183 between mile markers 103 and 121.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4143 9946 4158 9959 4174 9941 4174 9922
      4165 9921 4153 9921
TIME...MOT...LOC 0144Z 241DEG 40KT 4155 9932 

HAIL...1.75IN
WIND...70MPH
 
$$

Taylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:04 PM CDT	Severe Thunderstorm Warning	LBF	Holt	41 min
Apr 30, 7:22 PM CDT	Severe Thunderstorm Warning	LBF	Holt	38 min
Apr 30, 7:24 PM CDT	Severe Thunderstorm Warning	LBF	Custer	51 min
Apr 30, 7:37 PM CDT	Special Weather Statement	LBF	Lincoln	38 min
Apr 30, 7:37 PM CDT	Severe Thunderstorm Warning	LBF	Holt	38 min
Apr 30, 7:41 PM CDT	Severe Thunderstorm Warning	LBF	Garfield, Holt, Loup, Rock	49 min
Apr 30, 7:47 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt	43 min
Apr 30, 8:18 PM CDT	Severe Thunderstorm Warning	LBF	Custer	42 min
Apr 30, 8:51 PM CDT	Severe Thunderstorm Warning	LBF	Custer	39 min
Apr 30, 9:11 PM CDT	Areal Flood Advisory	LBF	Custer	67 min
Apr 30, 9:40 PM CDT	Special Weather Statement	LBF	Garfield, Wheeler	65 min
Apr 30, 9:42 PM CDT	Special Weather Statement	LBF	Garfield, Wheeler	63 min
Apr 30, 9:43 PM CDT	Special Weather Statement	LBF	Garfield, Wheeler	62 min
Apr 30, 10:19 PM CDT	Flash Flood Warning	LBF	Custer	3 hr
Apr 30, 10:45 PM CDT	Special Weather Statement	LBF	Garfield, Wheeler	60 min
Apr 30, 10:49 PM CDT	Areal Flood Advisory	LBF	Garfield	116 min
Apr 30, 11:46 PM CDT	Special Weather Statement	LBF	Wheeler	59 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2018 Every severe thunderstorm warning in 2018

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.