Alert archive / Colorado / Special Weather Statements in 2021

Special Weather Statement, NWS Goodland, KS

May 7, 2021Phillips County, Colorado

NWS Goodland, KS issued this special weather statement at May 7, 2021, 7:21 PM MDT for Phillips County, Colorado. It was in force for 24 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
May 7, 2021, 7:21 PM MDT (01:21 UTC)
Expired
May 7, 2021, 7:45 PM MDT
In force
24 min
Issued by
NWS Goodland, KS

County Phillips County, CO

The radar

The Goodland radar (KGLD), 140 km from the middle of the area, began a volume at 01:21 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 (KDNR), launched 00:00Z, 1.4 hours before the alert went out and 75 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 00:00Z on 2021-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 146 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2021-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
146 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
3574 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

496 
WWUS83 KGLD 080121
SPSGLD

Special Weather Statement
National Weather Service Goodland KS
721 PM MDT Fri May 7 2021
 
COZ090-080145-
Yuma County CO-
721 PM MDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN YUMA COUNTY UNTIL
745 PM MDT...

At 721 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Lone Star, or 13 miles northwest of Yuma, moving
northeast at 20 mph.

Pea size hail and outflow winds up to 45 mph will be possible with 
this storm.

Locations impacted include...
Clarkville.

LAT...LON 4044 10249 4043 10247 4026 10279 4035 10279
      4035 10278 4044 10278
TIME...MOT...LOC 0121Z 223DEG 19KT 4026 10291 

$$

DDT

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 7:05 PM MDTSpecial Weather StatementGLDKit Carson25 min
May 7, 7:11 PM MDTSpecial Weather StatementGLDCheyenne34 min
May 7, 7:32 PM MDTSpecial Weather StatementGLDKit Carson28 min
May 7, 8:09 PM MDTSpecial Weather StatementGLDKit Carson36 min
May 8, 5:04 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson41 min
May 8, 5:28 PM MDTSpecial Weather StatementGLDYuma47 min
May 8, 5:43 PM MDTSpecial Weather StatementGLDCheyenne, Kit Carson77 min

Nearby

Special Weather Statements in Colorado, 2021Every special weather statement in 2021

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.