Alert archive / Kansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 191, NWS Goodland, KS

July 29, 2020Graham County, Norton County, Kansas

NWS Goodland, KS issued this severe thunderstorm warning at Jul 29, 2020, 8:04 PM CDT for Graham County, Norton County, Kansas. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 29, 2020, 8:04 PM CDT (01:04 UTC)
Expired: Jul 29, 2020, 9:00 PM CDT
In force: 56 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Graham County, KS, Norton County, KS

The radar

The Grand Island radar (KUEX), 149 km from the middle of the area, began a volume at 01:07 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 29, 3:09 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 hours before the alert went out and 184 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: 569 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1837 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Goodland, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 29, 7:00 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 29, 7:00 PM CDT, 1 hour 4 minutes before

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Hazardous weather outlook, Jul 29, 11:15 AM CDT, 8 hours 49 minutes before

Hazardous Weather Outlook
National Weather Service Goodland KS
1015 AM MDT Wed Jul 29 2020

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-301645-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
1015 AM MDT Wed Jul 29 2020 /1115 AM CDT Wed Jul 29 2020/

This hazardous weather outlook is for extreme southwest Nebraska...
northwest Kansas and east central Colorado.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

Isolated to scattered thunderstorms will develop along the eastern
Colorado border area early this afternoon with storms becoming more
numerous through the late afternoon and evening as storms move
eastward. Isolated to scattered severe thunderstorms are possible
this afternoon and evening from extreme southwest Nebraska and across
northwest Kansas. Damaging winds and locally heavy rainfall are the
main threats along with hail larger than a quarter. A tornado or two
cannot be ruled out.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY...

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required.

In the hours before

Local storm report, Jul 29, 6:51 PM CDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
551 PM MDT WED JUL 29 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 PM     TSTM WND GST     2 ENE BARTLEY           40.26N 100.28W
07/29/2020  M56 MPH          RED WILLOW         NE   MESONET

&&

MRC

Special weather statement, Jul 29, 7:10 PM CDT, 54 minutes before

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Local storm report, Jul 29, 7:22 PM CDT, 42 minutes before

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Special weather statement, Jul 29, 7:34 PM CDT, 30 minutes before

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Local storm report, Jul 29, 7:54 PM CDT, 10 minutes before

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Special weather statement, Jul 29, 7:59 PM CDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 7:10 PM CDT	Special Weather Statement	GLD	Norton	20 min
Jul 29, 7:34 PM CDT	Special Weather Statement	GLD	Norton	26 min
Jul 29, 8:56 PM CDT	Special Weather Statement	GLD	Cheyenne	34 min
Jul 29, 9:02 PM CDT	Special Weather Statement	GLD	Graham	28 min
Jul 29, 9:36 PM CDT	Special Weather Statement	GLD	Cheyenne, Sherman	24 min
Jul 29, 10:20 PM CDT	Special Weather Statement	GLD	Rawlins	25 min
Jul 29, 10:43 PM CDT	Special Weather Statement	GLD	Thomas	32 min
Jul 29, 11:08 PM CDT	Special Weather Statement	GLD	Logan	22 min
Jul 29, 11:20 PM CDT	Severe Thunderstorm Warning	GLD	Graham, Sheridan	55 min
Jul 29, 11:52 PM CDT	Special Weather Statement	GLD	Norton	23 min
Jul 30, 12:09 AM CDT	Severe Thunderstorm Warning	GLD	Graham	36 min
Jul 29, 7:59 PM CDT	Special Weather Statement	GLD	Yuma	16 min
Jul 29, 8:07 PM CDT	Severe Thunderstorm Warning	GLD	Yuma	53 min
Jul 29, 9:40 PM CDT	Special Weather Statement	GLD	Cheyenne	35 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2020 Every severe thunderstorm warning in 2020

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.