Alert archive / Nebraska / Tornado Warnings in 2008

Tornado Warning 29, NWS Cheyenne, WY

July 22, 2008Banner County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 22, 2008, 9:07 PM MDT for Banner County, Nebraska. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 22, 2008, 9:07 PM MDT (03:07 UTC)
Expired
Jul 22, 2008, 9:30 PM MDT
In force
23 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon

County Banner County, NE

The radar

The Cheyenne radar (KCYS), 97 km from the middle of the area, began a volume at 03:09 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.

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 3.1 hours before the alert went out and 197 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 00:00Z on 2008-07-23Temperature 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 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2008-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -41 square meters per square second.1939Sfc1 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
3845 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-41 m²/s²
0-3 km storm-relative helicity
-60 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.

000 
WFUS55 KCYS 230307
TORCYS
NEC007-230330-
/O.NEW.KCYS.TO.W.0029.080723T0307Z-080723T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
907 PM MDT TUE JUL 22 2008

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 930 PM MDT

* AT 905 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  HARRISBURG...OR 24 MILES SOUTHWEST OF SCOTTSBLUFF...MOVING
  NORTHEAST AT 13 MPH.

* THE TORNADO WILL BE NEAR...
  HARRISBURG BY 930 PM...

MOVE INTO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. ABANDON MOBILE HOMES AND VEHICLES.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4169 10375 4154 10362 4143 10389 4159 10401
TIME...MOT...LOC 0307Z 241DEG 11KT 4155 10384

$$

DAUGHERTY
2 follow-up statements
000 
WWUS55 KCYS 230318
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
918 PM MDT TUE JUL 22 2008

NEC007-230330-
/O.CON.KCYS.TO.W.0029.000000T0000Z-080723T0330Z/
BANNER NE-
917 PM MDT TUE JUL 22 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM MDT FOR WESTERN
BANNER COUNTY...

AT 913 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS TORNADO WAS
LOCATED NEAR HARRISBURG...OR 22 MILES SOUTH OF SCOTTSBLUFF...MOVING
NORTHEAST AT 14 MPH.

THE POSSIBLE TORNADO WILL BE NEAR...
  HARRISBURG BY 925 PM...

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4169 10375 4154 10362 4143 10389 4159 10401
TIME...MOT...LOC 0317Z 226DEG 12KT 4157 10381

$$

DAUGHERTY
000 
WWUS55 KCYS 230334
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
934 PM MDT TUE JUL 22 2008

NEC007-230342-
/O.EXP.KCYS.TO.W.0029.000000T0000Z-080723T0330Z/
BANNER NE-
932 PM MDT TUE JUL 22 2008

...THE TORNADO WARNING FOR WESTERN BANNER COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING NO LONGER HAS A TORNADIC 
SIGNATURE ON RADAR AND NO REPORTS OF A TORNADO HAVE BEEN 
RECEIVED...THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4169 10375 4154 10362 4143 10389 4159 10401
TIME...MOT...LOC 0318Z 226DEG 12KT 4157 10381

$$
DAUGHERTY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 7:24 PM MDTSevere Thunderstorm WarningCYSMorrill51 min
Jul 22, 7:35 PM MDTFlash Flood WarningCYSMorrill4 hr
Jul 22, 8:40 PM MDTSevere Thunderstorm WarningCYSBanner, Scotts Bluff50 min
Jul 22, 9:27 PM MDTSevere Thunderstorm WarningCYSBanner, Morrill29 min
Jul 23, 5:22 PM MDTSevere Thunderstorm WarningCYSSioux38 min
Jul 23, 5:59 PM MDTSevere Thunderstorm WarningCYSScotts Bluff, Sioux33 min

Nearby

Tornado Warnings in Nebraska, 2008Every tornado warning in 2008Tornadoes in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.