Alert archive / Kansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 75, NWS Goodland, KS

June 21, 20204 counties in Kansas

NWS Goodland, KS issued this severe thunderstorm warning at Jun 21, 2020, 2:58 PM CDT for 4 counties in Kansas. It was in force for 77 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: Jun 21, 2020, 2:58 PM CDT (19:58 UTC)
Expired: Jun 21, 2020, 4:15 PM CDT
In force: 77 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 70.0 mph

Counties Decatur County, KS, Graham County, KS, Norton County, KS, Sheridan County, KS

The radar

The Goodland radar (KGLD), 133 km from the middle of the area, began a volume at 20:01 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
Jun 21, 2:03 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 8.0 hours before the alert went out and 201 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: 2453 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.7

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 Jun 21, 2:03 PM CDT, 55 minutes earlier.

Area forecast discussion, Jun 21, 2:03 PM CDT, 55 minutes before

Area Forecast Discussion
National Weather Service Goodland KS
103 PM MDT Sun Jun 21 2020

.SHORT TERM...(Through Tonight)
Issued at 1245 AM MDT Sun Jun 21 2020

As of 12:00 pm MDT, updrafts have begun to develop along the
dryline in Wallace/Logan counties. Thus far, updrafts have
remained relatively disorganized, however, as updrafts unzip
further east along the dryline -- in an increasingly unstable
airmass (mlcape 3500-4500 J/kg), damaging winds and large hail
will become increasingly likely. Expect activity to propagate ESE-
SE toward Garden City/Dodge City/Hays by 00Z.

.LONG TERM...(Monday through Sunday)
Issued at 102 PM MDT Sun Jun 21 2020

Daily chances for showers and storms are possible through the
weekend.  An upper trough will be over the High Plains and Central
High Plains Monday morning with northwest flow aloft over the Tri-
State area.  An upper ridge will be situated over the Western CONUS.
Showers and thunderstorms will be possible Monday and Tuesday as
embedded shortwave troughs move through the northwest flow into the
region.  Temperatures will range from the low to mid-80s for highs
both days.  Lows will be primarily in the 50s.

A lee trough is expected to develop on Wednesday with trough axis to
the west of the Kansas-Colorado border.  The ridge will begin to
flatten as it moves to the east, resulting in flow becoming zonal
Thursday night.  Showers and thunderstorms will be possible in the
afternoon and evening hours.  Temperatures will begin a gradual
warming trend Wednesday afternoon, returning to the upper 80s to low
90s.

Another upper trough will move across the Western U.S. Thursday
evening into Friday.  Flow will become southwest aloft over the Tri-
State area.  Showers and thunderstorms will be possible Thursday and
Friday.  The weekend is expected to remain dry for now with highs in
the 90s.
&&

.AVIATION...(For the 18Z TAFS through 18Z Monday afternoon)
Issued at 1145 AM MDT Sun Jun 21 2020

VFR conditions are anticipated to prevail through the TAF period.
Although an isolated thunderstorm cannot be ruled out this
afternoon -- activity is anticipated to remain south and east of
the GLD/MCK terminals. NW winds will increase to 15-25 knots late
this afternoon, veering to the N and decreasing to 10-15 knots AOA
sunset this evening.

&&

.GLD WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
CO...NONE.
NE...NONE.
&&

SHORT TERM...VINCENT
LONG TERM...AW
AVIATION...VINCENT

Hazardous weather outlook, Jun 21, 10:02 AM CDT, 4 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Goodland KS
902 AM MDT Sun Jun 21 2020

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-221515-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
902 AM MDT Sun Jun 21 2020 /1002 AM CDT Sun Jun 21 2020/

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

.DAY ONE...TODAY AND TONIGHT...

Severe thunderstorms capable of producing golf ball to baseball size
hail and wind gusts up to 75 mph are possible this afternoon, mainly
east of Highway 83 between 1-6 pm MDT. Storms will develop along or
near a line from Tribune-Colby-McCook by 1-2 pm MDT, quickly evolving
into a squall line that progresses east southeast into central
Kansas (east of Highway 283) by 4 to 6 PM MDT.

Additionally, near critical fire weather conditions are anticipated
in Eastern Colorado this afternoon.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

Scattered thunderstorms are expected Monday and Tuesday across the
area. However, the risk for severe storms will be low.

.SPOTTER INFORMATION STATEMENT...

Spotters and storm chasers are encouraged to report severe weather
(hail of any size, wind damage, measured wind gusts above 55 mph,
etc.) to the National Weather Service in Goodland via Twitter and
Facebook @NWSGoodland or via telephone by calling 1-800-272-7811.

Vincent

In the hours before

Special weather statement, Jun 21, 1:59 PM CDT, 59 minutes before

Special Weather Statement
National Weather Service Goodland KS
159 PM CDT Sun Jun 21 2020

KSZ014-015-029-211945-
Gove KS-Sheridan KS-Thomas KS-
159 PM CDT Sun Jun 21 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN THOMAS...
SOUTHWESTERN SHERIDAN AND NORTHWESTERN GOVE COUNTIES UNTIL 245 PM
CDT...

At 159 PM CDT, Doppler radar was tracking a strong thunderstorm over
Grinnell, moving east at 10 mph.

Penny size hail and wind gusts up to 55 mph will be possible with
this storm.

Locations impacted include...
Grainfield, Grinnell, Park and Angelus.

This includes Interstate 70 in Kansas between mile markers 78 and
100.

LAT...LON 3902 10079 3923 10079 3929 10037 3897 10035
TIME...MOT...LOC 1859Z 269DEG 9KT 3912 10066

Vincent

Local storm report, Jun 21, 2:08 PM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
108 PM MDT SUN JUN 21 2020

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

1253 PM     HAIL             12 S OAKLEY             38.95N 100.85W
06/21/2020  E1.50 INCH       LOGAN              KS   STORM CHASER

            CHASER REPORTED PING PONG SIZED HAIL.

&&

KMK

Local storm report, Jun 21, 2:12 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
112 PM MDT SUN JUN 21 2020

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

0104 PM     HAIL             GRINNELL                39.12N 100.63W
06/21/2020  E1.00 INCH       GOVE               KS   TRAINED SPOTTER

            TRAINED SPOTTER REPORTED QUARTER SIZED HAIL
            FALLING AT CALL TIME.

&&

KMK

Local storm report, Jun 21, 2:22 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
122 PM MDT SUN JUN 21 2020

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

0118 PM     HAIL             10 S OAKLEY             38.98N 100.85W
06/21/2020  E1.00 INCH       LOGAN              KS   EMERGENCY MNGR

            LOGAN CO EM REPORTED QUARTER SIZED HAIL
            ONGOING.

&&

KMK

Local storm report, Jun 21, 2:26 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
126 PM MDT SUN JUN 21 2020

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

0116 PM     HAIL             4 S GRINNELL            39.07N 100.63W
06/21/2020  E0.88 INCH       GOVE               KS   PUBLIC

            PEA TO NICKEL SIZED HAIL REPORTED VIA SOCIAL
            MEDIA. TIME ESTIMATED WITH RADAR.

&&

KMK

Local storm report, Jun 21, 2:43 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
143 PM MDT SUN JUN 21 2020

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

0104 PM     HAIL             1 S GRINNELL            39.11N 100.63W
06/21/2020  E1.00 INCH       GOVE               KS   PUBLIC

            REPORTED VIA SOCIAL MEDIA AT THE KS-216 EXIT
            ON I-70.

&&

KMK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:05 PM CDT	Severe Thunderstorm Warning	GLD	Norton	55 min
Jun 20, 7:26 PM CDT	Special Weather Statement	GLD	Graham	19 min
Jun 20, 7:35 PM CDT	Severe Thunderstorm Warning	GLD	Graham	11 min
Jun 20, 7:51 PM CDT	Severe Thunderstorm Warning	GLD	Norton	24 min
Jun 20, 8:09 PM CDT	Severe Thunderstorm Warning	GLD	Norton	66 min
Jun 21, 1:22 PM CDT	Special Weather Statement	GLD	Logan	38 min
Jun 21, 1:37 PM CDT	Severe Thunderstorm Warning	GLD	Gove, Logan	68 min
Jun 21, 1:59 PM CDT	Special Weather Statement	GLD	Gove	46 min
Jun 21, 2:03 PM CDT	Severe Thunderstorm Warning	GLD	Gove, Sheridan	57 min
Jun 21, 2:25 PM CDT	Severe Thunderstorm Warning	GLD	Greeley, Logan, Wichita	65 min
Jun 21, 2:41 PM CDT	Flash Flood Warning	GLD	Gove, Sheridan, Thomas	3 hr
Jun 21, 2:51 PM CDT	Severe Thunderstorm Warning	GLD	Gove, Logan	54 min
Jun 21, 3:33 PM CDT	Severe Thunderstorm Warning	GLD	Wichita	57 min
Jun 21, 4:03 PM CDT	Severe Thunderstorm Warning	GLD	Norton	47 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.