Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 90, NWS North Platte, NE

May 19, 2012Keith County, Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 19, 2012, 12:42 PM MDT for Keith County, Lincoln County, Nebraska. It was in force for 31 min. 2 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: May 19, 2012, 12:42 PM MDT (18:42 UTC)
Expired: May 19, 2012, 1:13 PM MDT
In force: 31 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Keith County, NE, Lincoln County, NE

The radar

The North Platte radar (KLNX), 109 km from the middle of the area, began a volume at 18:44 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
May 19, 12:47 PM MDT	HAIL 0.5	S Paxton, NE	COVERING THE GROUND.
May 19, 12:47 PM MDT	HAIL 0.88	1 Ne Paxton, NE

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, 6.7 hours before the alert went out and 53 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: 177 J/kg
Mixed-layer CIN: -495 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 423 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

037 
WUUS53 KLBF 191842
SVRLBF
NEC101-111-191930-
/O.NEW.KLBF.SV.W.0090.120519T1842Z-120519T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
142 PM CDT SAT MAY 19 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN KEITH COUNTY IN SOUTHWEST NEBRASKA...
  NORTHWESTERN LINCOLN COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 230 PM CDT/130 PM MDT/

* AT 1239 PM MDT/139 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  QUARTER SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 7 MILES SOUTHEAST OF ROSCOE TO PAXTON TO 6 MILES
  SOUTHWEST OF SUTHERLAND RESERVOIR STATE RECREATION AREA...AND
  MOVING NORTHEAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SUTHERLAND RESERVOIR STATE RECREATION AREA AND SARBEN AROUND 1250
  PM MDT.
  SUTHERLAND AROUND 155 PM CDT.
  HERSHEY AROUND 200 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
HIGHWAY 97 MILE MARKER 10.

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 4097 10125 4100 10125 4100 10139 4103 10153
      4136 10144 4138 10104 4130 10071 4095 10118
TIME...MOT...LOC 1842Z 215DEG 33KT 4111 10146 4111 10126
          4106 10114
WIND...HAIL <50MPH 1.00IN

$$

CDC

2 follow-up statements

611 
WWUS53 KLBF 191902
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
202 PM CDT SAT MAY 19 2012

NEC101-111-191930-
/O.CON.KLBF.SV.W.0090.000000T0000Z-120519T1930Z/
KEITH NE-LINCOLN NE-
202 PM CDT SAT MAY 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
LINCOLN AND EAST CENTRAL KEITH COUNTIES UNTIL 230 PM CDT/130 PM
MDT/...

AT 1258 PM MDT/158 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
SARBEN TO SUTHERLAND TO HERSHEY...MOVING NORTHEAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
KEITH AND NORTHWESTERN LINCOLN COUNTIES...INCLUDING THE FOLLOWING
LOCATIONS HIGHWAY 97 MILE MARKER 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND
AWAY FROM WINDOWS.

&&

LAT...LON 4114 10101 4118 10141 4136 10144 4138 10104
      4130 10071
TIME...MOT...LOC 1902Z 216DEG 31KT 4124 10133 4124 10113
          4119 10101
WIND...HAIL <50MPH 1.00IN

$$

CDC

066 
WWUS53 KLBF 191913
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
213 PM CDT SAT MAY 19 2012

NEC101-111-191923-
/O.CAN.KLBF.SV.W.0090.000000T0000Z-120519T1930Z/
KEITH NE-LINCOLN NE-
213 PM CDT SAT MAY 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LINCOLN AND EAST
CENTRAL KEITH COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 4114 10101 4118 10141 4136 10144 4138 10104
      4130 10071
TIME...MOT...LOC 1913Z 216DEG 31KT 4132 10125 4132 10105
          4127 10093

$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 7:25 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Grant	50 min
May 19, 7:52 AM MDT	Severe Thunderstorm Warning	LBF	McPherson	38 min
May 19, 8:32 AM MDT	Severe Thunderstorm Warning	LBF	Hooker, Logan, McPherson, Thomas	43 min
May 19, 12:16 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Frontier, Hayes	44 min
May 19, 12:58 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln	47 min
May 19, 1:39 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	51 min
May 19, 2:54 PM MDT	Severe Thunderstorm Warning	LBF	Custer	51 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.