Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 86, NWS North Platte, NE

May 18, 2012Arthur County, Grant County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 18, 2012, 7:25 PM MDT for Arthur County, Grant County, Nebraska. It was in force for 50 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 18, 2012, 7:25 PM MDT (01:25 UTC)
Expired
May 18, 2012, 8:15 PM MDT
In force
50 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Arthur County, NE, Grant County, NE

The radar

The North Platte radar (KLNX), 108 km from the middle of the area, began a volume at 01:25 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
May 18, 7:28 PM MDTHAIL 19 Sw Arthur, NE
May 18, 7:30 PM MDTHAIL 0.886 Sw Arthur, NEA FEW HAILSTONES UP TO NICKEL SIZE...SOME GUSTY WINDS TO 40 OR 50 MPH AND JUST A LITTLE RAINFALL.
May 18, 7:35 PM MDTHAIL 0.754 Sw Arthur, 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, 1.4 hours before the alert went out and 118 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 00:00Z on 2012-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 867 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2012-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
867 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
3002 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

681 
WUUS53 KLBF 190125
SVRLBF
NEC005-075-190215-
/O.NEW.KLBF.SV.W.0086.120519T0125Z-120519T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
725 PM MDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN ARTHUR COUNTY IN WEST CENTRAL NEBRASKA...
  SOUTH CENTRAL GRANT COUNTY IN WEST CENTRAL NEBRASKA...

* UNTIL 815 PM MDT

* AT 720 PM MDT...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 NEAR
  HAYTHORN LAKE...OR 8 MILES SOUTHWEST OF ARTHUR...AND MOVING NORTH
  AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HAYTHORN LAKE AROUND 730 PM MDT.
  ARTHUR AROUND 740 PM MDT.
  JENSEN LAKE AROUND 800 PM MDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE HIGHWAY
61 MILE MARKER 130 AND HIGHWAY 61 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 10191 4178 10159 4143 10172 4146 10196
TIME...MOT...LOC 0125Z 191DEG 12KT 4154 10182
WIND...HAIL 60MPH 1.00IN

$$

POWER
2 follow-up statements
698 
WWUS53 KLBF 190148
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
748 PM MDT FRI MAY 18 2012

NEC005-075-190215-
/O.CON.KLBF.SV.W.0086.000000T0000Z-120519T0215Z/
GRANT NE-ARTHUR NE-
748 PM MDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL ARTHUR
AND SOUTH CENTRAL GRANT COUNTIES UNTIL 815 PM MDT...

AT 745 PM MDT...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 NEAR
JENSEN LAKE...OR 6 MILES WEST OF ARTHUR...MOVING NORTH AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  JENSEN LAKE AROUND 800 PM MDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE HIGHWAY
61 MILE MARKER 130 AND HIGHWAY 61 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 4155 10195 4183 10191 4178 10159 4151 10169
TIME...MOT...LOC 0147Z 191DEG 12KT 4161 10180
WIND...HAIL 60MPH 1.00IN

$$

POWER
512 
WWUS53 KLBF 190215
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
915 PM CDT FRI MAY 18 2012

NEC005-075-190225-
/O.EXP.KLBF.SV.W.0086.000000T0000Z-120519T0215Z/
GRANT NE-ARTHUR NE-
815 PM MDT FRI MAY 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ARTHUR AND SOUTH
CENTRAL GRANT COUNTIES HAS EXPIRED...

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 ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4155 10195 4183 10191 4178 10159 4151 10169
TIME...MOT...LOC 0215Z 191DEG 12KT 4170 10178

$$

POWER

The office that day

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

IssuedProductOfficeCountiesLasted
May 19, 7:52 AM MDTSevere Thunderstorm WarningLBFMcPherson38 min
May 19, 8:32 AM MDTSevere Thunderstorm WarningLBFHooker, Logan, McPherson, Thomas43 min
May 19, 12:16 PM MDTSevere Thunderstorm WarningLBFChase, Frontier, Hayes44 min
May 19, 12:42 PM MDTSevere Thunderstorm WarningLBFKeith, Lincoln31 min
May 19, 12:58 PM MDTSevere Thunderstorm WarningLBFFrontier, Hayes, Lincoln47 min
May 19, 1:39 PM MDTSevere Thunderstorm WarningLBFLincoln51 min
May 19, 2:54 PM MDTSevere Thunderstorm WarningLBFCuster51 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.