Alert archive / Colorado / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 137, NWS Denver/Boulder, CO

July 9, 2013Phillips County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 9, 2013, 10:24 PM MDT for Phillips County, Colorado. It was in force for 36 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 9, 2013, 10:24 PM MDT (04:24 UTC)
Expired: Jul 9, 2013, 11:00 PM MDT
In force: 36 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Possible
Hail: 0.88 in
Wind: 60.0 mph

County Phillips County, CO

The radar

The Goodland radar (KGLD), 148 km from the middle of the area, began a volume at 04:25 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, 4.4 hours before the alert went out and 109 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3952 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -37 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 Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 9, 8:38 PM MDT, 1 hour 46 minutes earlier.

Area forecast discussion, Jul 9, 8:38 PM MDT, 1 hour 46 minutes before

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Hazardous weather outlook, Jul 9, 10:58 AM MDT, 11 hours 26 minutes before

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In the hours before

Special weather statement, Jul 9, 8:07 PM MDT, 2 hours 17 minutes before

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Special weather statement, Jul 9, 9:26 PM MDT, 58 minutes before

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Special weather statement, Jul 9, 9:27 PM MDT, 57 minutes before

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Special weather statement, Jul 9, 10:00 PM MDT, 24 minutes before

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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 8:07 PM MDT	Special Weather Statement	BOU	Sedgwick	38 min
Jul 9, 9:26 PM MDT	Special Weather Statement	BOU	Phillips	34 min
Jul 9, 9:27 PM MDT	Special Weather Statement	BOU	Sedgwick	33 min
Jul 9, 10:00 PM MDT	Special Weather Statement	BOU	Phillips	15 min
Jul 9, 10:17 PM MDT	Areal Flood Advisory	BOU	Phillips	88 min
Jul 9, 11:45 PM MDT	Areal Flood Advisory	BOU	Phillips	90 min
Jul 10, 12:21 PM MDT	Special Weather Statement	BOU	Jefferson	39 min
Jul 10, 1:24 PM MDT	Severe Thunderstorm Warning	BOU	Douglas	51 min
Jul 10, 1:39 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Elbert	36 min
Jul 10, 1:55 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	65 min
Jul 10, 2:28 PM MDT	Areal Flood Advisory	BOU	Elbert	3 hr
Jul 10, 2:48 PM MDT	Special Weather Statement	BOU	Adams, Arapahoe	42 min
Jul 10, 3:54 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	51 min
Jul 10, 4:26 PM MDT	Severe Thunderstorm Warning	BOU	Washington	34 min
Jul 10, 4:50 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	40 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2013 Every severe thunderstorm warning in 2013

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.