Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 161, NWS North Platte, NE

August 1, 20124 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 1, 2012, 5:10 PM MDT for 4 counties in Nebraska. It was in force for 50 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: Aug 1, 2012, 5:10 PM MDT (23:10 UTC)
Expired: Aug 1, 2012, 6:00 PM MDT
In force: 50 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Arthur County, NE, Keith County, NE, Lincoln County, NE, McPherson County, NE

The radar

The North Platte radar (KLNX), 89 km from the middle of the area, began a volume at 23:10 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 1, 5:15 PM MDT	TSTM WND GST 60	11 Ne Lemoyne, NE	SMALL BRANCHES DOWN. DIME SIZE HAIL ALSO REPORTED.

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 1, 2:19 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.2 hours before the alert went out and 66 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: 756 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 1649 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

288 
WUUS53 KLBF 012310
SVRLBF
NEC005-101-111-117-020000-
/O.NEW.KLBF.SV.W.0161.120801T2310Z-120802T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
610 PM CDT WED AUG 1 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ARTHUR COUNTY IN WEST CENTRAL NEBRASKA...
  NORTHERN KEITH COUNTY IN SOUTHWEST NEBRASKA...
  NORTHWESTERN LINCOLN COUNTY IN SOUTHWEST NEBRASKA...
  SOUTHERN MCPHERSON COUNTY IN WEST CENTRAL NEBRASKA...

* UNTIL 700 PM CDT/600 PM MDT/

* AT 605 PM CDT/505 PM MDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING      
  DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED      
  ALONG A LINE EXTENDING FROM SCHNICK LAKE TO 5 MILES NORTHWEST OF   
  KEYSTONE...AND MOVING SOUTHEAST AT 40 MPH. PENNY SIZE HAIL MAY     
  ALSO ACCOMPANY THESE DAMAGING WINDS.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  KEYSTONE AROUND 515 PM MDT.
  SARBEN AND PAXTON AROUND 535 PM MDT.
  SUTHERLAND AROUND 645 PM CDT.
  SUTHERLAND RESERVOIR STATE RECREATION AREA AROUND 650 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
HIGHWAY 97 MILE MARKER 20 AND INTERSTATE 80 MILE MARKER 150.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4129 10194 4166 10139 4154 10072 4146 10072
      4102 10118
TIME...MOT...LOC 2310Z 308DEG 33KT 4152 10118 4124 10162
WIND...HAIL 60MPH 0.75IN

$$

TAYLOR

1 follow-up statement

164 
WWUS53 KLBF 012339
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
639 PM CDT WED AUG 1 2012

NEC005-101-111-117-020000-
/O.CON.KLBF.SV.W.0161.000000T0000Z-120802T0000Z/
KEITH NE-LINCOLN NE-MCPHERSON NE-ARTHUR NE-
639 PM CDT WED AUG 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ARTHUR...SOUTHERN MCPHERSON...NORTHWESTERN LINCOLN AND NORTHERN KEITH
COUNTIES UNTIL 700 PM CDT/600 PM MDT/...

AT 533 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN 
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING 
FROM 5 MILES SOUTH OF BUCKTAIL LAKE TO 5 MILES NORTHWEST OF 
KEYSTONE...MOVING EAST AT 25 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY 
THESE DAMAGING WINDS.

IN ADDITION...60 MPH WINDS WERE REPORTED 11 MILES NNE OF LEMOYNE 
WITH THESE STORMS.

SEVERE THUNDERSTORMS WILL BE NEAR...
  KEYSTONE AROUND 545 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN NORTH PLATTE.

&&

LAT...LON 4129 10194 4166 10139 4154 10072 4146 10072
      4102 10118
TIME...MOT...LOC 2338Z 291DEG 23KT 4141 10139 4126 10163
WIND...HAIL 60MPH 0.75IN

$$

TAYLOR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 2:19 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	56 min
Aug 1, 2:23 PM MDT	Severe Thunderstorm Warning	LBF	Garden	52 min
Aug 1, 3:15 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	44 min
Aug 1, 4:03 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Grant	42 min
Aug 1, 5:00 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha	60 min
Aug 1, 5:44 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha, Rock	46 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2012 Every severe thunderstorm warning in 2012

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.