Alert archive / Colorado / Tornado Warnings in 2011

Tornado Warning 20, NWS Goodland, KS

June 18, 2011Cheyenne County, Colorado

NWS Goodland, KS issued this tornado warning at Jun 18, 2011, 4:28 PM MDT for Cheyenne County, Colorado. It was in force for 47 min. 6 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: Jun 18, 2011, 4:28 PM MDT (22:28 UTC)
Expired: Jun 18, 2011, 5:15 PM MDT
In force: 47 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon

County Cheyenne County, CO

The radar

The Goodland radar (KGLD), 88 km from the middle of the area, began a volume at 22:28 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
Jun 18, 4:29 PM MDT	TORNADO	3 Se Kit Carson, CO
Jun 18, 4:30 PM MDT	TORNADO	2 W Firstview, CO
Jun 18, 4:31 PM MDT	TORNADO	9 Se Kit Carson, CO
Jun 18, 5:00 PM MDT	FUNNEL CLOUD	4 S Cheyenne Wells, CO
Jun 18, 5:05 PM MDT	HAIL 4	4 S Cheyenne Wells, CO
Jun 18, 5:22 PM MDT	TSTM WND GST 75	8 S Cheyenne Wells, CO	DIME TO QUARTER SIZE HAIL FALLING ALSO

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 18, 12:31 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.5 hours before the alert went out and 140 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: 110 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 52 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.

491 
WFUS53 KGLD 182228
TORGLD
COC017-182315-
/O.NEW.KGLD.TO.W.0020.110618T2228Z-110618T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GOODLAND KS
428 PM MDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN CHEYENNE COUNTY IN EAST CENTRAL COLORADO...

* UNTIL 515 PM MDT

* AT 424 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES WEST OF FIRSTVIEW...AND WAS MOVING
  SOUTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FIRSTVIEW...CHEYENNE WELLS AND ARAPAHOE.

THIS INCLUDES HIGHWAY 385 BETWEEN MILE MARKERS 136 AND 162.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3904 10258 3893 10205 3862 10205 3861 10208
      3861 10265 3867 10283
TIME...MOT...LOC 2228Z 300DEG 32KT 3878 10261
HAIL 1.25IN
$$

JLUNDQUI

1 follow-up statement

256 
WWUS53 KGLD 182240
SVSGLD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
440 PM MDT SAT JUN 18 2011

COC017-182315-
/O.CON.KGLD.TO.W.0020.000000T0000Z-110618T2315Z/
CHEYENNE CO-
440 PM MDT SAT JUN 18 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN CHEYENNE COUNTY
UNTIL 515 PM MDT...

AT 437 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES SOUTH OF FIRSTVIEW...AND WAS MOVING
SOUTHEAST AT 35 MPH.

AT 432 PM A STORM CHASER REPORTED A TORNADO APPROXIMATELY 2 MILES 
WEST OF FIRST VIEW.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
DESTRUCTIVE HAIL UP TO HEN EGG SIZE.  

LOCATIONS IMPACTED INCLUDE...
  CHEYENNE WELLS AND ARAPAHOE.

THIS INCLUDES HIGHWAY 385 BETWEEN MILE MARKERS 136 AND 162.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

&&

LAT...LON 3904 10258 3893 10205 3862 10205 3861 10208
      3861 10265 3867 10283
TIME...MOT...LOC 2239Z 300DEG 32KT 3873 10250
HAIL 2.00IN
$$

JLUNDQUI

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 17, 6:24 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	66 min
Jun 17, 6:32 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	32 min
Jun 18, 2:38 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	41 min
Jun 18, 2:44 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson, Yuma	61 min
Jun 18, 3:08 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	67 min
Jun 18, 3:16 PM MDT	Tornado Warning	GLD	Cheyenne, Kit Carson	44 min
Jun 18, 3:28 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson, Yuma	62 min
Jun 18, 3:57 PM MDT	Tornado Warning	GLD	Cheyenne, Kit Carson	48 min
Jun 18, 4:01 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	59 min
Jun 18, 5:13 PM MDT	Tornado Warning	GLD	Cheyenne	47 min

Nearby

Tornado Warnings in Colorado, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.