Alert archive / Colorado / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 174, NWS Goodland, KS

July 23, 2009Yuma County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jul 23, 2009, 4:37 PM MDT for Yuma County, Colorado. It was in force for 53 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: Jul 23, 2009, 4:37 PM MDT (22:37 UTC)
Expired: Jul 23, 2009, 5:30 PM MDT
In force: 53 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon

County Yuma County, CO

The radar

The Goodland radar (KGLD), 94 km from the middle of the area, began a volume at 22:38 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
Jul 23, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.6 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-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: 155 J/kg
Mixed-layer CIN: -353 J/kg
Mixed-layer LCL: 2232 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 82 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 Jul 23, 3:44 PM MDT, 53 minutes earlier.

Area forecast discussion, Jul 23, 3:44 PM MDT, 53 minutes before

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Hazardous weather outlook, Jul 23, 9:58 AM MDT, 6 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GOODLAND KS
958 AM MDT THU JUL 23 2009

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-241345-
YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON-
SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA-
DUNDY-HITCHCOCK-RED WILLOW-
958 AM MDT THU JUL 23 2009 /1058 AM CDT THU JUL 23 2009/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST
NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO.

.DAY ONE...TODAY AND TONIGHT

WIDELY SCATTERED AFTERNOON AND EVENING THUNDERSTORMS WILL OCCUR
AGAIN TODAY. THE BEST CHANCES WILL BE IN EASTERN COLORADO AND
SOUTHWEST NEBRASKA...WITH ONLY A SLIGHT CHANCE IN NORTHWEST KANSAS
TONIGHT. AN ISOLATED SEVERE STORM CANNOT BE RULED OUT...WITH GUSTY
WINDS AND LARGE HAIL BEING THE PRIMARY THREATS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

DAILY CHANCES OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS
WILL CONTINUE MUCH OF THIS PERIOD. WHILE NO WIDESPREAD SEVERE
WEATHER IS ANTICIPATED...ISOLATED STRONGER STORMS WILL CONTINUE TO
PRESENT A THREAT OF HAIL AND GUSTY WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT.

KJ

In the hours before

Local storm report, Jul 23, 3:31 PM MDT, 1 hour 6 minutes before

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Local storm report, Jul 23, 3:52 PM MDT, 45 minutes before

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Local storm report, Jul 23, 4:13 PM MDT, 24 minutes before

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Local storm report, Jul 23, 4:19 PM MDT, 18 minutes before

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Local storm report, Jul 23, 4:26 PM MDT, 11 minutes before

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Local storm report, Jul 23, 4:29 PM MDT, 8 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 6:04 PM MDT	Severe Thunderstorm Warning	GLD	Sherman, Thomas	56 min
Jul 22, 6:11 PM MDT	Severe Thunderstorm Warning	GLD	Graham, Norton	42 min
Jul 22, 6:23 PM MDT	Flash Flood Warning	GLD	Cheyenne	2 hr
Jul 22, 6:40 PM MDT	Severe Thunderstorm Warning	GLD	Wichita	30 min
Jul 22, 6:48 PM MDT	Severe Thunderstorm Warning	GLD	Graham, Sheridan	57 min
Jul 23, 5:25 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Sherman	65 min
Jul 22, 6:44 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	61 min
Jul 23, 2:56 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	64 min
Jul 23, 3:38 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	67 min
Jul 23, 3:41 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	64 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2009 Every severe thunderstorm warning in 2009

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.