Alert archive / Nebraska / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 13, NWS Cheyenne, WY

May 26, 2016Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 26, 2016, 3:26 PM MDT for Box Butte County, Dawes County, Nebraska. It was in force for 49 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 26, 2016, 3:26 PM MDT (21:26 UTC)
Expired: May 26, 2016, 4:15 PM MDT
In force: 49 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.75 in
Wind: 50.0 mph

Counties Box Butte County, NE, Dawes County, NE

The radar

The Cheyenne radar (KCYS), 196 km from the middle of the area, began a volume at 21:29 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 26, 3:29 PM MDT	HAIL 1.75	6 W Hemingford, NE
May 26, 3:43 PM MDT	HAIL 0.25	Hemingford, NE
May 26, 3:47 PM MDT	HAIL 0.5	Hemingford, NE	VERY SOFT

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

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 9.4 hours before the alert went out and 195 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: 1944 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

151 
WUUS55 KCYS 262126
SVRCYS
NEC013-045-262215-
/O.NEW.KCYS.SV.W.0013.160526T2126Z-160526T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
326 PM MDT THU MAY 26 2016

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DAWES COUNTY IN THE PANHANDLE OF NEBRASKA...
  NORTHERN BOX BUTTE COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 415 PM MDT

* AT 326 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTHWEST
  OF HEMINGFORD...OR 20 MILES NORTHWEST OF ALLIANCE...MOVING NORTHEAST
  AT 30 MPH.

  HAZARD...GOLF BALL SIZE HAIL. 

  SOURCE...PUBLIC. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. 

* LOCATIONS IMPACTED INCLUDE...
  HEMINGFORD...BOX BUTTE CAMPGROUND AND BOX BUTTE DAM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4215 10325 4231 10336 4263 10293 4241 10274
      4230 10275
TIME...MOT...LOC 2126Z 242DEG 25KT 4228 10320 

HAIL...1.75IN
WIND...<50MPH
 
$$

FINCH

2 follow-up statements

884 
WWUS55 KCYS 262151
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
351 PM MDT THU MAY 26 2016

NEC013-045-262215-
/O.CON.KCYS.SV.W.0013.000000T0000Z-160526T2215Z/
DAWES NE-BOX BUTTE NE-
351 PM MDT THU MAY 26 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM MDT
FOR SOUTHEASTERN DAWES AND NORTHEASTERN BOX BUTTE COUNTIES...

AT 350 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HEMINGFORD...OR
19 MILES NORTH OF ALLIANCE...MOVING NORTHEAST AT 30 MPH.

HAZARD...HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

THIS SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTHEASTERN DAWES AND NORTHEASTERN BOX BUTTE COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4221 10303 4241 10318 4259 10289 4241 10274
      4230 10275
TIME...MOT...LOC 2150Z 242DEG 25KT 4236 10299 

HAIL...1.25IN
WIND...<50MPH
 
$$

FINCH

293 
WWUS55 KCYS 262209
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
409 PM MDT THU MAY 26 2016

NEC013-045-262219-
/O.EXP.KCYS.SV.W.0013.000000T0000Z-160526T2215Z/
DAWES NE-BOX BUTTE NE-
409 PM MDT THU MAY 26 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DAWES AND
NORTHEASTERN BOX BUTTE COUNTIES WILL EXPIRE AT 415 PM MDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER SMALL HAIL
AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4221 10303 4241 10318 4259 10289 4241 10274
      4230 10275
TIME...MOT...LOC 2205Z 242DEG 25KT 4236 10299 

$$

FINCH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 6:11 PM MDT	Special Weather Statement	CYS	Kimball	34 min
May 25, 6:57 PM MDT	Special Weather Statement	CYS	Kimball	33 min
May 26, 2:56 PM MDT	Special Weather Statement	CYS	Box Butte	49 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2016 Every severe thunderstorm warning in 2016

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.