Alert archive / Colorado / Special Weather Statements in 2017

Special Weather Statement, NWS Goodland, KS

August 4, 2017Yuma County, Colorado

NWS Goodland, KS issued this special weather statement at Aug 4, 2017, 11:15 PM MDT for Yuma County, Colorado. It was in force for 30 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: Aug 4, 2017, 11:15 PM MDT (05:15 UTC)
Expired: Aug 4, 2017, 11:45 PM MDT
In force: 30 min
Issued by: NWS Goodland, KS

County Yuma County, CO

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 5.3 hours before the alert went out and 78 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: 126 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 3512 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 10:27 PM MDT, 48 minutes earlier.

Area forecast discussion, Aug 4, 10:27 PM MDT, 48 minutes before

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Hazardous weather outlook, Aug 4, 10:28 PM MDT, 47 minutes before

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In the hours before

Special weather statement, Aug 4, 11:15 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Goodland KS
1115 PM MDT FRI AUG 4 2017

COZ090-050545-
Yuma County CO-
1115 PM MDT FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN YUMA COUNTY UNTIL
1145 PM MDT...

At 1114 PM MDT, Doppler radar was tracking a strong thunderstorm near
Eckley, or 10 miles west of Wray, moving northeast at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Wray, Eckley, Laird and Wauneta.

This includes Highway 385 between mile markers 240 and 261.

LAT...LON 4000 10250 4025 10256 4033 10222 4002 10207
TIME...MOT...LOC 0514Z 241DEG 15KT 4012 10242

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 1:24 AM MDT	Special Weather Statement	GLD	Norton	36 min
Aug 5, 1:41 AM MDT	Severe Thunderstorm Warning	GLD	Norton	23 min
Aug 5, 1:03 AM MDT	Special Weather Statement	GLD	Red Willow	27 min
Aug 5, 1:27 AM MDT	Special Weather Statement	GLD	Red Willow	33 min

Nearby

Special Weather Statements in Colorado, 2017 Every special weather statement in 2017

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.