Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 12, NWS North Platte, NE

April 12, 2012Arthur County, Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 12, 2012, 4:12 PM MDT for Arthur County, Keith County, Nebraska. It was in force for 33 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
Apr 12, 2012, 4:12 PM MDT (22:12 UTC)
Expired
Apr 12, 2012, 4:45 PM MDT
In force
33 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.75 in
Wind
50.0 mph

Counties Arthur County, NE, Keith County, NE

The radar

The North Platte radar (KLNX), 112 km from the middle of the area, began a volume at 22:14 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

TimeReportWhereRemark
Apr 12, 4:15 PM MDTHAIL 16 Nw Kingsley Dam, NE
Apr 12, 4:17 PM MDTHAIL 1.754 Nw Kingsley Dam, 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, 10.2 hours before the alert went out and 99 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2012-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2012-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
665 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

099 
WUUS53 KLBF 122212
SVRLBF
NEC005-101-122245-
/O.NEW.KLBF.SV.W.0012.120412T2212Z-120412T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
412 PM MDT THU APR 12 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ARTHUR COUNTY IN WEST CENTRAL NEBRASKA...
  NORTH CENTRAL KEITH COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 445 PM MDT

* AT 409 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM PRODUCING GOLF BALL SIZE HAIL.  THIS STORM WAS LOCATED
  NEAR LEMOYNE...OR 11 MILES NORTH OF OGALLALA...AND MOVING NORTHEAST
  AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ARTHUR AROUND 440 PM MDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE HIGHWAY
61 MILE MARKER 110.

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 4159 10176 4151 10141 4117 10174 4128 10192
TIME...MOT...LOC 2212Z 213DEG 30KT 4130 10178
WIND...HAIL <50MPH 1.75IN

$$

MASEK
3 follow-up statements
094 
WWUS53 KLBF 122223
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
423 PM MDT THU APR 12 2012

NEC005-101-122245-
/O.CON.KLBF.SV.W.0012.000000T0000Z-120412T2245Z/
KEITH NE-ARTHUR NE-
423 PM MDT THU APR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ARTHUR AND NORTH CENTRAL KEITH COUNTIES UNTIL 445 PM MDT...

AT 418 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS
STORM WAS LOCATED NEAR LEMOYNE...OR 9 MILES NORTH OF OGALLALA...
MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH
CENTRAL KEITH AND SOUTHEASTERN ARTHUR COUNTIES.

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.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4130 10182 4159 10176 4151 10141 4117 10174
TIME...MOT...LOC 2223Z 232DEG 22KT 4128 10170
WIND...HAIL <50MPH 1.75IN

$$

MASEK
885 
WWUS53 KLBF 122234
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
434 PM MDT THU APR 12 2012

NEC005-101-122245-
/O.CON.KLBF.SV.W.0012.000000T0000Z-120412T2245Z/
KEITH NE-ARTHUR NE-
434 PM MDT THU APR 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ARTHUR AND NORTH CENTRAL KEITH COUNTIES UNTIL 445 PM MDT...

AT 432 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS
STORM WAS LOCATED 7 MILES NORTH OF KEYSTONE...OR 14 MILES NORTH OF
OGALLALA...MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH
CENTRAL KEITH AND SOUTHEASTERN ARTHUR COUNTIES.

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.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4139 10175 4159 10176 4151 10141 4127 10164
TIME...MOT...LOC 2234Z 225DEG 25KT 4133 10162
WIND...HAIL <50MPH 1.75IN

$$

MASEK
075 
WWUS53 KLBF 122247
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
447 PM MDT THU APR 12 2012

NEC005-101-122255-
/O.EXP.KLBF.SV.W.0012.000000T0000Z-120412T2245Z/
KEITH NE-ARTHUR NE-
447 PM MDT THU APR 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ARTHUR AND NORTH 
CENTRAL KEITH COUNTIES HAS BEEN REISSUED...

PLEASE REFER TO THAT BULLETIN FOR THE LATEST SEVERE WEATHER
INFORMATION.

LAT...LON 4139 10175 4159 10176 4151 10141 4127 10164
TIME...MOT...LOC 2234Z 225DEG 25KT 4133 10162

$$

MASEK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 3:36 PM MDTSevere Thunderstorm WarningLBFDeuel, Garden39 min
Apr 12, 3:39 PM MDTSevere Thunderstorm WarningLBFArthur, Keith38 min
Apr 12, 3:43 PM MDTSevere Thunderstorm WarningLBFKeith47 min
Apr 12, 4:44 PM MDTSevere Thunderstorm WarningLBFArthur, Keith, McPherson31 min
Apr 12, 5:13 PM MDTSevere Thunderstorm WarningLBFKeith, Perkins47 min
Apr 12, 5:14 PM MDTSevere Thunderstorm WarningLBFMcPherson46 min
Apr 12, 5:55 PM MDTTornado WarningLBFPerkins35 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2012Every 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.