Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 187, NWS North Platte, NE

August 6, 2012Lincoln County, McPherson County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 6, 2012, 8:39 PM CDT for Lincoln County, McPherson County, Nebraska. It was in force for 51 min. 4 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 6, 2012, 8:39 PM CDT (01:39 UTC)
Expired: Aug 6, 2012, 9:30 PM CDT
In force: 51 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Lincoln County, NE, McPherson County, NE

The radar

The North Platte radar (KLNX), 67 km from the middle of the area, began a volume at 01:39 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 6, 8:42 PM CDT	HAIL 0.5	5 S Ringgold, NE
Aug 6, 9:06 PM CDT	TSTM WND GST 60	3 N North Platte, NE	OFF DUTY NWS EMPLOYEE ESTIMATED 60 MPH THUNDERSTORM WIND GUST.
Aug 6, 9:10 PM CDT	TSTM WND GST 60	6 N North Platte, NE	EMERGENCY MANAGER ESTIMATED THUNDERSTORM WIND GUST SPEED TO 60 MPH ALONG WITH SOME PEA SIZED HAI.
Aug 6, 9:16 PM CDT	HAIL 0.75	10 N North Platte, 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 00:00Z, 1.7 hours before the alert went out and 28 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: 251 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 3546 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

974 
WUUS53 KLBF 070139
SVRLBF
NEC111-117-070230-
/O.NEW.KLBF.SV.W.0187.120807T0139Z-120807T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
839 PM CDT MON AUG 6 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL LINCOLN COUNTY IN SOUTHWEST NEBRASKA...
  SOUTHEASTERN MCPHERSON COUNTY IN WEST CENTRAL NEBRASKA...

* UNTIL 930 PM CDT

* AT 830 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING
  PING PONG BALL SIZE HAIL.  THIS STORM WAS LOCATED 7 MILES SOUTH OF
  RINGGOLD...OR 13 MILES WEST OF STAPLETON...AND MOVING SOUTH AT 15
  MPH.

  AT 835 PM HALF DOLLAR SIZE HAIL WAS REPORTED SOUTH OF RINGGOLD WITH
  THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  NORTH PLATTE...HIGHWAY 97 MILE MARKER 10...HIGHWAY 83 MILE MARKER
  100 AND HIGHWAY 83 MILE MARKER 90.

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 4152 10093 4155 10072 4140 10072 4139 10070
      4139 10046 4109 10030 4106 10093
TIME...MOT...LOC 0138Z 348DEG 14KT 4138 10075
WIND...HAIL <50MPH 1.50IN

$$

CDC

4 follow-up statements

183 
WWUS53 KLBF 070141
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
841 PM CDT MON AUG 6 2012

NEC111-117-070230-
/O.CON.KLBF.SV.W.0187.000000T0000Z-120807T0230Z/
LINCOLN NE-MCPHERSON NE-
841 PM CDT MON AUG 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MCPHERSON AND NORTH CENTRAL LINCOLN COUNTIES UNTIL 930 PM CDT...

AT 834 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING
PING PONG BALL SIZE HAIL.  THIS STORM WAS LOCATED 8 MILES SOUTH OF
RINGGOLD...OR 14 MILES SOUTHWEST OF STAPLETON...MOVING SOUTH AT 15
MPH.

IN ADDITION...AT 835 PM HALF DOLLAR SIZE HAIL WAS REPORTED SOUTH OF 
RINGGOLD WITH THIS STORM.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTH PLATTE AROUND 930 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE HIGHWAY
97 MILE MARKER 10 AND HIGHWAY 83 MILE MARKER 90.

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 4152 10093 4155 10072 4140 10072 4139 10070
      4139 10046 4109 10030 4106 10093
TIME...MOT...LOC 0140Z 348DEG 14KT 4137 10075
WIND...HAIL <50MPH 1.50IN

$$

CDC

698 
WWUS53 KLBF 070202 RRA
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
902 PM CDT MON AUG 6 2012

NEC117-070212-
/O.CAN.KLBF.SV.W.0187.000000T0000Z-120807T0230Z/
MCPHERSON NE-
902 PM CDT MON AUG 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MCPHERSON COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4134 10093 4138 10045 4109 10030 4106 10093
TIME...MOT...LOC 0202Z 347DEG 18KT 4127 10072

$$

NEC111-070230-
/O.CON.KLBF.SV.W.0187.000000T0000Z-120807T0230Z/
LINCOLN NE-
902 PM CDT MON AUG 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
LINCOLN COUNTY UNTIL 930 PM CDT...

AT 853 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
THIS STORM WAS LOCATED 12 MILES NORTH OF NORTH PLATTE...MOVING SOUTH
AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTH PLATTE AROUND 925 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE HIGHWAY
83 MILE MARKER 90.

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 4134 10093 4138 10045 4109 10030 4106 10093
TIME...MOT...LOC 0202Z 347DEG 18KT 4127 10072
WIND...HAIL <50MPH 1.50IN

$$

CDC

391 
WWUS53 KLBF 070209
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
909 PM CDT MON AUG 6 2012

NEC111-070230-
/O.CON.KLBF.SV.W.0187.000000T0000Z-120807T0230Z/
LINCOLN NE-
909 PM CDT MON AUG 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
LINCOLN COUNTY UNTIL 930 PM CDT...

AT 857 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING 
DAMAGING WINDS NEAR 60 MPH. THIS STORM WAS LOCATED 10 MILES NORTH 
OF NORTH PLATTE...MOVING SOUTH AT 20 MPH.

AT 905 PM 60 MPH WINDS WERE REPORTED BY A TRAINED SPOTTER NEAR THE 
INTERSECTION OF HIGHWAYS 83 AND 97.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTH PLATTE AROUND 920 PM CDT.

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 4134 10093 4138 10045 4109 10030 4106 10093
TIME...MOT...LOC 0207Z 352DEG 27KT 4120 10070
WIND...HAIL 60MPH 1.50IN

$$

CDC

850 
WWUS53 KLBF 070226
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
926 PM CDT MON AUG 6 2012

NEC111-070236-
/O.EXP.KLBF.SV.W.0187.000000T0000Z-120807T0230Z/
LINCOLN NE-
926 PM CDT MON AUG 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LINCOLN COUNTY WILL
EXPIRE AT 930 PM CDT/830 PM MDT/...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL EXPECTED WITH THIS 
THUNDERSTORM.

LAT...LON 4134 10093 4138 10045 4109 10030 4106 10093
TIME...MOT...LOC 0226Z 352DEG 27KT 4106 10067

$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 7:05 PM CDT	Severe Thunderstorm Warning	LBF	Rock	26 min
Aug 6, 8:47 PM CDT	Severe Thunderstorm Warning	LBF	Loup, Rock	43 min
Aug 7, 5:19 PM CDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	56 min
Aug 7, 6:00 PM CDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	25 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.