Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 40, NWS North Platte, NE

April 14, 20125 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 14, 2012, 8:29 PM CDT for 5 counties in Nebraska. It was in force for 46 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 14, 2012, 8:29 PM CDT (01:29 UTC)
Expired: Apr 14, 2012, 9:15 PM CDT
In force: 46 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Garfield County, NE, Holt County, NE, Loup County, NE, Rock County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 149 km from the middle of the area, began a volume at 01:32 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 14, 8:32 PM CDT	HAIL 1.5	19 Sw Chambers, NE
Apr 14, 8:56 PM CDT	HAIL 0.25	12 Sw Atkinson, NE

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
Apr 14, 2:33 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 232 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: 871 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 276 m²/s²
0-3 km storm-relative helicity: 483 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

633 
WUUS53 KLBF 150129
SVRLBF
NEC071-089-115-149-183-150215-
/O.NEW.KLBF.SV.W.0040.120415T0129Z-120415T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
829 PM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GARFIELD COUNTY IN NORTH CENTRAL NEBRASKA...
  HOLT COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHEASTERN LOUP COUNTY IN NORTH CENTRAL NEBRASKA...
  SOUTHEASTERN ROCK COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHWESTERN WHEELER COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 915 PM CDT

* AT 828 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 8
  MILES NORTHEAST OF PONY LAKE TO 11 MILES NORTH OF CALAMUS RESERVOIR
  STATE RECREATION AREA...AND MOVING NORTHEAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SWAN LAKE AROUND 840 PM CDT.
  ATKINSON AND AMELIA AROUND 850 PM CDT.
  EMMET AND CHAMBERS AROUND 905 PM CDT.
  ONEILL...GOOSE LAKE STATE WILDLIFE MANAGEMENT AREA AND FOUR CORNERS
  AROUND 915 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
HIGHWAY 11 MILE MARKER 110...HIGHWAY 11 MILE MARKER 140...HIGHWAY 281
MILE MARKER 170 AND HIGHWAY 281 MILE MARKER 190.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4264 9851 4187 9844 4188 9930 4258 9940
TIME...MOT...LOC 0129Z 271DEG 34KT 4249 9926 4202 9916
WIND...HAIL <50MPH 1.00IN

$$

JACOBS

2 follow-up statements

082 
WWUS53 KLBF 150145
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
845 PM CDT SAT APR 14 2012

NEC115-150154-
/O.CAN.KLBF.SV.W.0040.000000T0000Z-120415T0215Z/
LOUP NE-
845 PM CDT SAT APR 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LOUP COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.

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 4189 9919 4208 9922 4209 9924 4258 9936
      4264 9851 4187 9844 4187 9845
TIME...MOT...LOC 0144Z 271DEG 34KT 4248 9907 4201 9897

$$

NEC071-089-149-183-150215-
/O.CON.KLBF.SV.W.0040.000000T0000Z-120415T0215Z/
GARFIELD NE-HOLT NE-ROCK NE-WHEELER NE-
845 PM CDT SAT APR 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WHEELER...SOUTHEASTERN ROCK...HOLT AND NORTHERN GARFIELD COUNTIES
UNTIL 915 PM CDT...

AT 841 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 7 MILES SOUTHWEST OF ATKINSON TO
10 MILES SOUTH OF SWAN LAKE...MOVING EAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  ATKINSON AND AMELIA AROUND 850 PM CDT.
  EMMET AND CHAMBERS AROUND 905 PM CDT.
  ONEILL...GOOSE LAKE STATE WILDLIFE MANAGEMENT AREA...FOUR CORNERS
  AND INMAN AROUND 915 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE HIGHWAY 11
MILE MARKER 140...HIGHWAY 281 MILE MARKER 170 AND HIGHWAY 281 MILE
MARKER 190.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

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

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4189 9919 4208 9922 4209 9924 4258 9936
      4264 9851 4187 9844 4187 9845
TIME...MOT...LOC 0144Z 271DEG 34KT 4248 9907 4201 9897
WIND...HAIL 60MPH 1.00IN

$$

JACOBS

058 
WWUS53 KLBF 150212
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
912 PM CDT SAT APR 14 2012

NEC071-089-149-183-150222-
/O.EXP.KLBF.SV.W.0040.000000T0000Z-120415T0215Z/
GARFIELD NE-HOLT NE-ROCK NE-WHEELER NE-
912 PM CDT SAT APR 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WHEELER...
SOUTHEASTERN ROCK...HOLT AND NORTHERN GARFIELD COUNTIES WILL EXPIRE
AT 915 PM CDT...

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...GUSTY WINDS AND HEAVY RAIN ARE STILL
POSSIBLE WITH THESE THUNDERSTORMS.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 11 PM CDT.

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 4189 9919 4208 9922 4209 9924 4258 9936
      4264 9851 4187 9844 4187 9845
TIME...MOT...LOC 0212Z 271DEG 34KT 4247 9871 4200 9861

$$

JACOBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 7:01 PM CDT	Tornado Warning	LBF	Blaine, Loup	16 min
Apr 14, 7:05 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer	40 min
Apr 14, 7:18 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	42 min
Apr 14, 7:35 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	40 min
Apr 14, 7:41 PM CDT	Tornado Warning	LBF	Blaine, Custer, Loup	34 min
Apr 14, 8:07 PM CDT	Tornado Warning	LBF	Garfield, Holt, Loup, Rock	25 min
Apr 14, 8:13 PM CDT	Severe Thunderstorm Warning	LBF	Custer	47 min
Apr 14, 8:15 PM CDT	Severe Thunderstorm Warning	LBF	Custer	33 min
Apr 14, 8:39 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Garfield, Loup	51 min
Apr 14, 8:47 PM CDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, McPherson	43 min
Apr 14, 9:32 PM CDT	Severe Thunderstorm Warning	LBF	Custer	43 min
Apr 14, 11:18 PM CDT	River Flood Warning	LBF	Lincoln	21 hr
Apr 15, 3:59 PM CDT	High Wind Warning	LBF	Blaine, Boyd, Brown, Cherry, Custer, Garfield and 6 more	6 hr

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.