Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 44, NWS North Platte, NE

May 1, 2012Brown County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 1, 2012, 4:16 PM CDT for Brown County, Nebraska. It was in force for 44 min. 3 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 1, 2012, 4:16 PM CDT (21:16 UTC)
Expired: May 1, 2012, 5:00 PM CDT
In force: 44 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Brown County, NE

The radar

The North Platte radar (KLNX), 84 km from the middle of the area, began a volume at 21:19 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 1, 4:35 PM CDT	HAIL 1.5	4 Se Johnstown, NE	GROUND COVERED IN HAIL.
May 1, 4:47 PM CDT	HAIL 1.75	4 Sw Ainsworth, NE
May 1, 5:05 PM CDT	HAIL 1.5	4 S Ainsworth, 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, 9.3 hours before the alert went out and 163 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: 1327 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 963 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 49 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.

445 
WUUS53 KLBF 012116
SVRLBF
NEC017-012200-
/O.NEW.KLBF.SV.W.0044.120501T2116Z-120501T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
416 PM CDT TUE MAY 1 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BROWN COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 500 PM CDT

* AT 414 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  NORTH OF MOON LAKE...OR 17 MILES SOUTHWEST OF AINSWORTH...AND
  MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  AINSWORTH...JOHNSTOWN...LONG PINE...KELLER PARK STATE RECREATION
  AREA...HIGHWAY 7 MILE MARKER 30 AND HIGHWAY 7 MILE MARKER 40.

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 4223 9968 4235 10015 4262 10017 4273 9971
      4273 9969
TIME...MOT...LOC 2117Z 264DEG 23KT 4245 10013
WIND...HAIL 60MPH 1.00IN

$$

SPRINGER

2 follow-up statements

037 
WWUS53 KLBF 012137
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
437 PM CDT TUE MAY 1 2012

NEC017-012200-
/O.CON.KLBF.SV.W.0044.000000T0000Z-120501T2200Z/
BROWN NE-
437 PM CDT TUE MAY 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BROWN
COUNTY UNTIL 500 PM CDT...

AT 432 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
SOUTHEAST OF JOHNSTOWN...OR 7 MILES SOUTHWEST OF AINSWORTH...MOVING
EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  AINSWORTH...KELLER PARK STATE RECREATION AREA...LONG PINE AND
  HIGHWAY 7 MILE MARKER 40.

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 4223 9968 4235 10015 4262 10017 4273 9971
      4273 9969
TIME...MOT...LOC 2137Z 251DEG 31KT 4252 9993
WIND...HAIL 60MPH 1.00IN

$$

SPRINGER

433 
WWUS53 KLBF 012150
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
450 PM CDT TUE MAY 1 2012

NEC017-012200-
/O.CON.KLBF.SV.W.0044.000000T0000Z-120501T2200Z/
BROWN NE-
450 PM CDT TUE MAY 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BROWN
COUNTY UNTIL 500 PM CDT...

AT 446 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING
PING PONG BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
THIS STORM WAS LOCATED NEAR AINSWORTH...MOVING EAST AT 25 MPH.

IN ADDITION...AT 435 PM CDT WAS REPORTED WITH THIS STORM WITH THIS 
STORM 4 MILES SOUTHEAST OF JOHNSTOWN.

LOCATIONS IMPACTED INCLUDE...
  KELLER PARK STATE RECREATION AREA AND LONG PINE.

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 4223 9968 4235 10015 4262 10017 4273 9971
      4273 9969
TIME...MOT...LOC 2149Z 281DEG 23KT 4248 9984
WIND...HAIL 60MPH 1.50IN

$$

SPRINGER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 4:58 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Rock	62 min
May 1, 5:46 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Rock	48 min
May 1, 6:31 PM CDT	Severe Thunderstorm Warning	LBF	Rock	44 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.