Alert archive / Nebraska / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 8, NWS North Platte, NE

April 9, 2017Frontier County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 9, 2017, 5:01 PM CDT for Frontier County, Nebraska. It was in force for 25 min. 1 report 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 9, 2017, 5:01 PM CDT (22:01 UTC)
Expired: Apr 9, 2017, 5:26 PM CDT
In force: 25 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Frontier County, NE

The radar

The Grand Island radar (KUEX), 146 km from the middle of the area, began a volume at 22:03 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 9, 5:11 PM CDT	TSTM WND GST 60	Eustis, NE	TRAINED SPOTTER IN EUSTIS

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

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.0 hours before the alert went out and 77 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1407 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 266 m²/s²
0-3 km storm-relative helicity: 305 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

735 
WUUS53 KLBF 092201
SVRLBF
NEC063-092245-
/O.NEW.KLBF.SV.W.0008.170409T2201Z-170409T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
501 PM CDT SUN APR 9 2017

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Eastern Frontier County in southwestern Nebraska...

* Until 545 PM CDT

* At 500 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles east of Moorefield to 7 miles east of
  Medicine Creek Reservoir State Recreation Area, moving east at 35
  mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Eustis and Orafino. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4070 10038 4070 9998 4044 9998 4043 10009
      4035 10010 4035 10014
TIME...MOT...LOC 2200Z 256DEG 32KT 4068 10027 4042 10010 

HAIL...<.75IN
WIND...60MPH
 
$$

Gomez

2 follow-up statements

185 
WWUS53 KLBF 092217
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
517 PM CDT SUN APR 9 2017

NEC063-092245-
/O.CON.KLBF.SV.W.0008.000000T0000Z-170409T2245Z/
Frontier NE-
517 PM CDT SUN APR 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHEASTERN FRONTIER COUNTY...

At 515 PM CDT, severe thunderstorms were located along a line
extending from near Eustis to 10 miles north of Arapahoe, moving east
at 35 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Trained weather spotters. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Eustis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4070 10028 4070 9998 4044 9998 4049 10006
TIME...MOT...LOC 2215Z 256DEG 32KT 4071 10011 4045 9994 

HAIL...<.75IN
WIND...60MPH
 
$$

Gomez

806 
WWUS53 KLBF 092226
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
526 PM CDT SUN APR 9 2017

NEC063-092235-
/O.CAN.KLBF.SV.W.0008.000000T0000Z-170409T2245Z/
Frontier NE-
526 PM CDT SUN APR 9 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FRONTIER COUNTY
IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been cancelled.

LAT...LON 4070 10028 4070 9998 4044 9998 4049 10006
TIME...MOT...LOC 2223Z 256DEG 32KT 4073 10001 4047 9984 

$$

Gomez

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 3:44 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln	46 min
Apr 9, 4:29 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln	31 min
Apr 9, 4:32 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	28 min
Apr 9, 5:35 PM CDT	Severe Thunderstorm Warning	LBF	Custer	40 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2017 Every severe thunderstorm warning 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.