Special Weather Statement, NWS Goodland, KS

Area Forecast Discussion
National Weather Service Goodland KS
318 PM MDT Mon May 28 2018

.SHORT TERM...(This evening through Tuesday)
Issued at 301 PM MDT Mon May 28 2018

Main concern widespread severe and heavy rainfall/flash flooding
concerns especially tonight and probably lingering into Tuesday.
Combination of outflow boundary and slow moving cold front are
currently draped across the area. A shortwave trough is also
moving across. The air mass is very moist and unstable is in
place. Mesoscale boundary to our south with southerly riding over
the top of it has kept persistent thunderstorms going across the
area all day.

This area will continue. Current high resolution guidance shows a
number of waves of thunderstorms moving across the area through
the night. The combination of all these parameters will cause
severe thunderstorms into this evening. These thunderstorms have
produced up to 2 inch per hour rainfall rates with many locations
in the northern and eastern portion of the area receiving heavy
rainfall since last night. Considering the rainfall that has
occurred, is going on, and is expected through tonight, have
issued a Flash Flood Watch through the night.

Have not been able to spend much for Tuesday. However surface boundary
looks to be over the central portion of the area by early
afternoon. At the same time a shortwave trough will move across.
To start the day there should be lingering thunderstorms over the
eastern portion of the area. The surface boundary and shortwave
trough will cause thunderstorms to increase in coverage and
intensity during the afternoon. So the possibility still exists
for severe thunderstorms with a slight risk in the day 2 outlook.
Since the same air mass is in place will have a continued risk for
heavy rainfall and flash flooding.

.LONG TERM...(Tuesday night through Monday)
Issued at 301 PM MDT Mon May 28 2018

Not much time due to ongoing hazardous weather. A couple of
shortwaves will continue thunderstorm chances Tuesday and
Wednesday nights. After a few dry days, chances of thunderstorms
return during the weekend and especially late in the weekend into
Monday.

In general there looks to be a warming trend through this period.
Made no changes to what forecast builder gave me due to lack of
time.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 1139 AM MDT Mon May 28 2018

This is a messy and uncertain forecast due to ongoing convection
and mesoscale features that are not being resolved by the current
model run, even the high resolution output. The winds will be high
variable in direction due to outflow boundaries draped across the
area. For Kgld, the wind direction outside thunderstorms will tend
to be south to southeast at 15 to 25 mph with gusts to around 25
mph. For Kmck, the winds will vary from northeast to southeast at
15 to 25 mph with occasional gusts to around 30 mph.

Thunderstorms are expected to develop across the entire between
18z and 21z and will cover most of the forecast area. Vfr
conditions are expected except for the occasional mvfr conditions
when a stronger cell comes across. Later on tonight after the
storms have finished mvfr to occasional ifr conditions will occur.

&&

.GLD WATCHES/WARNINGS/ADVISORIES...
KS...Flash Flood Watch through Tuesday morning for KSZ001>004-014>016-
     028-029.

CO...Flash Flood Watch through late tonight for COZ090.

NE...Flash Flood Watch through late tonight for NEZ079>081.

&&

SHORT TERM...BULLER
LONG TERM...BULLER
AVIATION...BULLER

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
941 PM MDT MON MAY 28 2018

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

0935 PM     HAIL             1 NNE GOODLAND          39.37N 101.70W
05/28/2018  E0.50 INCH       SHERMAN            KS   OFFICIAL NWS OBS

            0.25" TO 0.50" SIZE HAIL OBSERVED AT NWS GLD
            AT 9:35 PM MDT.

&&

VINCENT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
944 PM MDT MON MAY 28 2018

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

0930 PM     HAIL             ENE GOODLAND            39.35N 101.71W
05/28/2018  E0.50 INCH       SHERMAN            KS   TRAINED SPOTTER

&&

BWARREN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
945 PM MDT MON MAY 28 2018

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

0930 PM     HAIL             GOODLAND                39.35N 101.71W
05/28/2018  E0.50 INCH       SHERMAN            KS   PUBLIC

            SOUTH SIDE OF GOODLAND

&&

BWARREN

Special Weather Statement
National Weather Service Goodland KS
1049 PM CDT MON MAY 28 2018

KSZ014-290415-
Thomas KS-
1049 PM CDT MON MAY 28 2018

...SPECIAL WEATHER STATEMENT...

At 1049 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Colby, moving northeast at 30 mph.

Pea to dime size hail can be expected with this storm.

Locations impacted include...
Colby, Gem, Mingo and Halford.

This includes Interstate 70 in Kansas between mile markers 48 and 68.

LAT...LON 3920 10091 3918 10102 3918 10113 3925 10122
      3933 10122 3937 10118 3945 10107 3949 10096
      3949 10086 3943 10074 3936 10074 3927 10079
TIME...MOT...LOC 0349Z 232DEG 28KT 3928 10106

Vincent

Special Weather Statement
National Weather Service Goodland KS
1105 PM MDT MON MAY 28 2018

COZ091-092-290530-
Kit Carson County CO-Cheyenne County CO-
1105 PM MDT MON MAY 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CHEYENNE AND
SOUTHWESTERN KIT CARSON COUNTIES IN EAST CENTRAL COLORADO UNTIL 1130
PM MDT...

At 1105 PM MDT, Doppler radar was tracking a strong thunderstorm 14
miles south of Flagler, moving northeast at 25 mph.

Dime to nickel size hail will be possible with this storm.

Locations impacted include...
Seibert.

This includes Interstate 70 in Colorado between mile markers 396 and
409.

LAT...LON 3926 10306 3931 10296 3932 10286 3927 10275
      3915 10270 3903 10275 3894 10295 3894 10306
      3899 10313 3907 10316 3909 10316
TIME...MOT...LOC 0505Z 220DEG 21KT 3909 10296

Vincent

Special Weather Statement
National Weather Service Goodland KS
1113 PM MDT MON MAY 28 2018

COZ091-290545-
Kit Carson County CO-
1113 PM MDT MON MAY 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KIT CARSON COUNTY
UNTIL 1145 PM MDT...

At 1112 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Burlington, moving northeast at 20 mph.

Dime size hail will be possible with this storm.

This storm will remain over mainly rural areas of northeastern Kit
Carson County.

This includes Highway 385 between mile markers 192 and 206, and near
mile marker 211.

LAT...LON 3938 10219 3932 10232 3934 10242 3942 10247
      3951 10243 3957 10232 3957 10205 3947 10206
TIME...MOT...LOC 0512Z 217DEG 19KT 3943 10232

Vincent