Alert archive / Colorado / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 122, NWS Goodland, KS

May 30, 2018Yuma County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at May 30, 2018, 4:01 PM MDT for Yuma County, Colorado. It was in force for 44 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
May 30, 2018, 4:01 PM MDT (22:01 UTC)
Expired
May 30, 2018, 4:45 PM MDT
In force
44 min
Issued by
NWS Goodland, KS
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

County Yuma County, CO

The radar

The Goodland radar (KGLD), 94 km from the middle of the area, began a volume at 22:04 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, 10.0 hours before the alert went out and 70 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2018-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2018-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2035 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 May 30, 2:57 PM MDT, 1 hour 4 minutes earlier.

Area forecast discussion, May 30, 2:57 PM MDT, 1 hour 4 minutes before
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Hazardous weather outlook, May 30, 10:55 AM MDT, 5 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service Goodland KS
1055 AM MDT Wed May 30 2018

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-311200-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
1055 AM MDT Wed May 30 2018 /1155 AM CDT Wed May 30 2018/

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

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

Scattered thunderstorms will develop in eastern Colorado around 2 PM
MDT and track eastward. Some of the storms may become severe, with a
primary threat of quarter to golf ball size hail and damaging winds
of 60 to 70 MPH. Also these storms will produce locally heavy
rainfall which could cause flash flooding, especially in those areas
that have received heavy rainfall recently. Because of the recent
rainfall it will not take very much rainfall to cause flash flooding
to occur quickly.

The chance of severe storms will last through the evening hours. The
greatest chance of severe thunderstorms and locally heavy rainfall will
be roughly along and south of a Wray to Colby to Hill City line.

.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

Special weather statement, May 30, 3:48 PM MDT, 13 minutes before
Special Weather Statement
National Weather Service Goodland KS
348 PM MDT WED MAY 30 2018

COZ090-302215-
Yuma County CO-
348 PM MDT WED MAY 30 2018

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL YUMA COUNTY UNTIL
415 PM MDT...

At 348 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles north of Cope, or 26 miles south of Yuma, moving northeast at
10 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

This storm will remain over mainly rural areas of west central Yuma
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3989 10280 3991 10277 3976 10265 3971 10280
TIME...MOT...LOC 2148Z 230DEG 9KT 3976 10288

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 6:25 PM MDTSpecial Weather StatementGLDCheyenne35 min
May 29, 7:03 PM MDTSpecial Weather StatementGLDCheyenne27 min
May 30, 5:23 PM MDTSevere Thunderstorm WarningGLDSherman52 min
May 30, 5:48 PM MDTSpecial Weather StatementGLDSherman, Wallace27 min
May 30, 3:48 PM MDTSpecial Weather StatementGLDYuma27 min
May 30, 4:57 PM MDTSpecial Weather StatementGLDKit Carson33 min
May 30, 5:13 PM MDTSpecial Weather StatementGLDKit Carson32 min
May 29, 7:01 PM MDTSpecial Weather StatementGLDHitchcock29 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2018Every severe thunderstorm warning in 2018

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.