Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 8, NWS Cheyenne, WY

May 5, 2012Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 5, 2012, 4:21 PM MDT for Kimball County, Nebraska. It was in force for 39 min. 4 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 5, 2012, 4:21 PM MDT (22:21 UTC)
Expired
May 5, 2012, 5:00 PM MDT
In force
39 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

County Kimball County, NE

The radar

The Cheyenne radar (KCYS), 81 km from the middle of the area, began a volume at 22:21 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 5, 4:55 PM MDTHAIL 1.7510 Nw Kimball, NELASTED FOR 5 TO 6 MINUTES
May 5, 4:58 PM MDTHAIL 0.887 N Kimball, NEA FEW STONES WERE LARGER
May 5, 5:04 PM MDTHAIL 1.53 N Kimball, NE
May 5, 5:10 PM MDTHAIL 2.51 N Kimball, NEGOLF BALL TO TENNIS BALL SIZED HAIL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.4 hours before the alert went out and 166 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, Denver, CO at 12:00Z on 2012-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2012-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.19395878Sfc1 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
2826 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
33 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.

535 
WUUS55 KCYS 052221
SVRCYS
NEC105-052300-
/O.NEW.KCYS.SV.W.0008.120505T2221Z-120505T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
421 PM MDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 500 PM MDT

* AT 416 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED 7 MILES NORTHWEST OF OLIVER CAMPGROUND...OR
  14 MILES WEST OF KIMBALL...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTHERN
  KIMBALL COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS 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.

&&

LAT...LON 4119 10397 4133 10406 4139 10405 4140 10353
      4119 10353
TIME...MOT...LOC 2222Z 255DEG 20KT 4130 10387
WIND...HAIL <50MPH 1.50IN

$$

LIEBL
1 follow-up statement
467 
WWUS55 KCYS 052247
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
447 PM MDT SAT MAY 5 2012

NEC105-052300-
/O.CON.KCYS.SV.W.0008.000000T0000Z-120505T2300Z/
KIMBALL NE-
447 PM MDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
KIMBALL COUNTY UNTIL 500 PM MDT...

AT 444 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
THIS STORM WAS LOCATED 6 MILES NORTHEAST OF OLIVER RESERVOIR...OR 6
MILES NORTHWEST OF KIMBALL...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  KIMBALL AROUND 455 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 
ONE IS 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.

&&

LAT...LON 4119 10397 4133 10406 4139 10405 4140 10353
      4119 10353
TIME...MOT...LOC 2247Z 261DEG 21KT 4130 10372
WIND...HAIL <50MPH 1.50IN

$$

LIEBL

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 2:48 PM MDTSpecial Weather StatementCYSBanner42 min
May 5, 2:54 PM MDTSevere Thunderstorm WarningCYSBanner39 min
May 5, 3:49 PM MDTSevere Thunderstorm WarningCYSBanner41 min
May 5, 4:27 PM MDTSevere Thunderstorm WarningCYSBanner33 min
May 5, 4:49 PM MDTSevere Thunderstorm WarningCYSBanner, Kimball41 min
May 5, 5:02 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball43 min
May 5, 5:13 PM MDTSevere Thunderstorm WarningCYSKimball47 min
May 5, 5:23 PM MDTSevere Thunderstorm WarningCYSBanner, Kimball55 min
May 5, 5:37 PM MDTTornado WarningCYSKimball38 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.