Alert archive / Colorado / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 35, NWS Grand Junction, CO

July 8, 2015Delta County, Mesa County, Colorado

NWS Grand Junction, CO issued this severe thunderstorm warning at Jul 8, 2015, 7:07 PM MDT for Delta County, Mesa County, Colorado. It was in force for 23 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 8, 2015, 7:07 PM MDT (01:07 UTC)
Expired: Jul 8, 2015, 7:30 PM MDT
In force: 23 min
Issued by: NWS Grand Junction, CO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Delta County, CO, Mesa County, CO

The radar

The Grand Junction radar (KGJX), 14 km from the middle of the area, began a volume at 01:11 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

Salt Lake City I, UT (KSLC), launched 00:00Z, 1.1 hours before the alert went out and 379 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: 21 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 2322 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 94 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 Grand Junction, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 4:35 PM MDT, 2 hours 32 minutes earlier.

Area forecast discussion, Jul 8, 4:35 PM MDT, 2 hours 32 minutes before

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Hazardous weather outlook, Jul 8, 5:45 AM MDT, 13 hours 22 minutes before

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In the hours before

Special weather statement, Jul 8, 6:24 PM MDT, 43 minutes before

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Local storm report, Jul 8, 6:28 PM MDT, 39 minutes before

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Local storm report, Jul 8, 6:31 PM MDT, 36 minutes before

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Special weather statement, Jul 8, 6:41 PM MDT, 26 minutes before

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Local storm report, Jul 8, 6:47 PM MDT, 20 minutes before

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Local storm report, Jul 8, 6:58 PM MDT, 9 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 8, 6:18 PM MDT	Special Weather Statement	GJT	Mesa	42 min
Jul 8, 6:41 PM MDT	Flash Flood Warning	GJT	Mesa	2 hr
Jul 8, 6:41 PM MDT	Special Weather Statement	GJT	Mesa	49 min
Jul 8, 7:01 PM MDT	Areal Flood Advisory	GJT	Delta, Mesa	3 hr
Jul 9, 1:08 PM MDT	Special Weather Statement	GJT	Dolores	52 min
Jul 9, 2:25 PM MDT	Special Weather Statement	GJT	Mesa	50 min
Jul 9, 2:27 PM MDT	Special Weather Statement	GJT	Montrose	48 min
Jul 9, 2:40 PM MDT	Special Weather Statement	GJT		50 min
Jul 9, 2:57 PM MDT	Special Weather Statement	GJT	Ouray	33 min
Jul 9, 3:11 PM MDT	Special Weather Statement	GJT	Mesa	49 min
Jul 9, 3:21 PM MDT	Special Weather Statement	GJT		39 min
Jul 9, 4:14 PM MDT	Special Weather Statement	GJT		46 min
Jul 9, 4:30 PM MDT	Special Weather Statement	GJT	Mesa	45 min
Jul 9, 5:32 PM MDT	Areal Flood Advisory	GJT	Mesa	118 min
Jul 8, 6:24 PM MDT	Special Weather Statement	GJT	San Juan	36 min
Jul 9, 12:48 PM MDT	Special Weather Statement	GJT	Grand	42 min
Jul 9, 1:04 PM MDT	Special Weather Statement	GJT	Uintah	26 min
Jul 9, 1:31 PM MDT	Special Weather Statement	GJT	San Juan	44 min
Jul 9, 1:43 PM MDT	Special Weather Statement	GJT	Uintah	47 min
Jul 9, 1:48 PM MDT	Areal Flood Advisory	GJT	Uintah	3 hr
Jul 9, 1:54 PM MDT	Special Weather Statement	GJT	Uintah	51 min
Jul 9, 2:12 PM MDT	Special Weather Statement	GJT	San Juan	33 min
Jul 9, 2:21 PM MDT	Special Weather Statement	GJT	San Juan	39 min
Jul 9, 2:49 PM MDT	Special Weather Statement	GJT	Uintah	41 min
Jul 9, 3:47 PM MDT	Special Weather Statement	GJT	Grand	43 min
Jul 9, 4:08 PM MDT	Areal Flood Advisory	GJT	Grand	3 hr
Jul 9, 5:14 PM MDT	Special Weather Statement	GJT	Grand	46 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2015 Every severe thunderstorm warning in 2015

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.