Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 88, NWS North Platte, NE

May 19, 20124 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 19, 2012, 8:32 AM MDT for 4 counties in Nebraska. It was in force for 43 min. 1 report 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, 8:32 AM MDT (14:32 UTC)
Expired: May 19, 2012, 9:15 AM MDT
In force: 43 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Hooker County, NE, Logan County, NE, McPherson County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 12 km from the middle of the area, began a volume at 14:34 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, 8:40 AM MDT	HAIL 1	19 Sw Thedford, NE	NICKEL TO QUARTER SIZE HAIL COVERING THE GROUND.

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, 2.5 hours before the alert went out and 81 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.

083 
WUUS53 KLBF 191432
SVRLBF
NEC091-113-117-171-191515-
/O.NEW.KLBF.SV.W.0088.120519T1432Z-120519T1515Z/

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

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN HOOKER COUNTY IN WEST CENTRAL NEBRASKA...
  NORTHWESTERN LOGAN COUNTY IN WEST CENTRAL NEBRASKA...
  NORTHEASTERN MCPHERSON COUNTY IN WEST CENTRAL NEBRASKA...
  THOMAS COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 1015 AM CDT/915 AM MDT/

* AT 929 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE              
  HAIL. THIS STORM WAS LOCATED 11 MILES NORTH OF TRYON...AND MOVING  
  NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  THEDFORD...HIGHWAY 83 CROSSING THE DISMAL RIVER...HIGHWAY 83 MILE
  MARKER 130 AND HIGHWAY 83 MILE MARKER 140.

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 4183 10027 4181 10027 4159 10087 4174 10101
      4209 10067 4209 10061
TIME...MOT...LOC 1431Z 236DEG 32KT 4172 10085
WIND...HAIL <50MPH 1.00IN

$$

TAYLOR

2 follow-up statements

919 
WWUS53 KLBF 191449
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
949 AM CDT SAT MAY 19 2012

NEC091-113-117-191458-
/O.CAN.KLBF.SV.W.0088.000000T0000Z-120519T1515Z/
HOOKER NE-LOGAN NE-MCPHERSON NE-
949 AM CDT SAT MAY 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MCPHERSON...
NORTHWESTERN LOGAN AND SOUTHEASTERN HOOKER COUNTIES IS CANCELLED...

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

LAT...LON 4183 10027 4181 10027 4174 10071 4175 10084
      4209 10067 4209 10061
TIME...MOT...LOC 1448Z 236DEG 32KT 4181 10068

$$

NEC171-191515-
/O.CON.KLBF.SV.W.0088.000000T0000Z-120519T1515Z/
THOMAS NE-
949 AM CDT SAT MAY 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THOMAS COUNTY
UNTIL 1015 AM CDT...

AT 943 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS 
STORM WAS LOCATED 10 MILES WEST OF HIGHWAY 83 CROSSING THE DISMAL 
RIVER...OR 16 MILES SOUTHWEST OF THEDFORD...MOVING NORTHEAST AT 35 
MPH.

LOCATIONS IMPACTED INCLUDE...
  THEDFORD...HIGHWAY 83 CROSSING THE DISMAL RIVER AND HIGHWAY 83 MILE
  MARKER 140.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4183 10027 4181 10027 4174 10071 4175 10084
      4209 10067 4209 10061
TIME...MOT...LOC 1448Z 236DEG 32KT 4181 10068
WIND...HAIL <50MPH 1.00IN

$$

TAYLOR

509 
WWUS53 KLBF 191513
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1013 AM CDT SAT MAY 19 2012

NEC171-191523-
/O.EXP.KLBF.SV.W.0088.000000T0000Z-120519T1515Z/
THOMAS NE-
1013 AM CDT SAT MAY 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR THOMAS COUNTY WILL EXPIRE AT
1015 AM CDT/915 AM MDT/...

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

LAT...LON 4183 10027 4181 10027 4174 10071 4175 10084
      4209 10067 4209 10061
TIME...MOT...LOC 1513Z 236DEG 32KT 4193 10043

$$

TAYLOR

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, 12:16 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Frontier, Hayes	44 min
May 19, 12:42 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	31 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.