Alert archive / Kansas / Tornado Warnings in 2017

Tornado Warning 30, NWS Goodland, KS

July 21, 2017Cheyenne County, Rawlins County, Kansas

NWS Goodland, KS issued this tornado warning at Jul 21, 2017, 6:00 PM CDT for Cheyenne County, Rawlins County, Kansas. It was in force for 30 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 21, 2017, 6:00 PM CDT (23:00 UTC)
Expired: Jul 21, 2017, 6:30 PM CDT
In force: 30 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Tornado: Observed
Hail: 0.0 in

Counties Cheyenne County, KS, Rawlins County, KS

The radar

The Goodland radar (KGLD), 63 km from the middle of the area, began a volume at 23:03 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 (KDEN), launched 12:00Z, 11.0 hours before the alert went out and 153 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: 4 J/kg
Mixed-layer CIN: -429 J/kg
Mixed-layer LCL: 1965 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -55 m²/s²
0-3 km storm-relative helicity: -16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

169 
WFUS53 KGLD 212300
TORGLD
KSC023-153-212330-
/O.NEW.KGLD.TO.W.0030.170721T2300Z-170721T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Goodland KS
600 PM CDT FRI JUL 21 2017

The National Weather Service in Goodland has issued a

* Tornado Warning for...
  East central Cheyenne County in northwestern Kansas...
  Western Rawlins County in northwestern Kansas...

* Until 630 PM CDT

* At 559 PM CDT, a confirmed tornado was located 8 miles northwest of
  McDonald, or 11 miles southeast of Benkelman, and is nearly
  stationary.

  HAZARD...Tornado. 

  SOURCE...Law enforcement confirmed tornado. At 555 pm CDT, a 
           tornado was reported 8 miles north northeast of Bird 
           City. 

  IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

* This tornadic thunderstorm will remain over mainly rural areas of
  east central Cheyenne and western Rawlins Counties in northwestern
  Kansas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3989 10135 3983 10150 3989 10160 3997 10140
TIME...MOT...LOC 2259Z 151DEG 2KT 3990 10144 

TORNADO...OBSERVED
HAIL...0.00IN

$$

Husted

2 follow-up statements

492 
WWUS53 KGLD 212313
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
613 PM CDT FRI JUL 21 2017

KSC023-153-212330-
/O.CON.KGLD.TO.W.0030.000000T0000Z-170721T2330Z/
Cheyenne KS-Rawlins KS-
613 PM CDT FRI JUL 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR EAST
CENTRAL CHEYENNE AND WESTERN RAWLINS COUNTIES IN NORTHWESTERN
KANSAS...
    
At 612 PM CDT, a confirmed tornado was located 9 miles northwest of
McDonald, or 11 miles south of Benkelman, and is nearly stationary.

HAZARD...TORNADO. 

SOURCE...Law enforcement confirmed tornado.

IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

This tornadic thunderstorm will remain over mainly rural areas of
east central Cheyenne and western Rawlins Counties in northwestern
Kansas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3989 10135 3983 10150 3989 10160 3997 10140
TIME...MOT...LOC 2312Z 122DEG 3KT 3990 10146 

TORNADO...OBSERVED
HAIL...0.00IN

$$

Husted

749 
WWUS53 KGLD 212324
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
624 PM CDT FRI JUL 21 2017

KSC023-153-212331-
/O.EXP.KGLD.TO.W.0030.000000T0000Z-170721T2330Z/
Cheyenne KS-Rawlins KS-
624 PM CDT FRI JUL 21 2017

...THE TORNADO WARNING FOR EAST CENTRAL CHEYENNE AND WESTERN RAWLINS
COUNTIES IN NORTHWESTERN KANSAS WILL EXPIRE AT 630 PM CDT...
                
Based on reports, the tornado has dissipated. Therefore, the tornado 
warning will be allowed to expire. However, conditions remain 
favorable for brief tornadoes. Locations in Cheyenne and Rawlins 
counties in Kansas should remain alert for additional development.

LAT...LON 3989 10135 3983 10150 3989 10160 3997 10140
TIME...MOT...LOC 2321Z 151DEG 2KT 3990 10146 

$$

Husted

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 6:10 PM CDT	Special Weather Statement	GLD	Cheyenne	50 min
Jul 21, 6:44 PM CDT	Special Weather Statement	GLD	Cheyenne	16 min
Jul 21, 6:59 PM CDT	Special Weather Statement	GLD	Cheyenne	61 min

Nearby

Tornado Warnings in Kansas, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.