Alert archive / Arizona / Mesoscale Discussions in 2004

Mesoscale Discussion 1715

July 16, 2004Mohave County, Arizona; Clark County, Nevada

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2004, 3:50 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jul 16, 2004, 3:50 PM MST (22:50 UTC)
Expired: Jul 16, 2004, 5:15 PM MST
In force: 85 min
Issued by: the Storm Prediction Center

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 42 km from the middle of the area, began a volume at 22:52 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 650Jul 16, 4:05 PM MST

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 10.8 hours before the alert went out and 146 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: 255 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1902 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 1:14 PM MST	Mesoscale Discussion	SPC	Gila, Graham, Maricopa, Pinal, Yavapai	3 hr
Jul 16, 2:00 PM MST	Severe Thunderstorm Watch	SPC	Gila, Maricopa, Pima, Pinal	6 hr
Jul 16, 4:05 PM MST	Severe Thunderstorm Watch	SPC	Mohave	5 hr

Nearby

Mesoscale Discussions in Arizona, 2004 Mesoscale Discussions in Nevada, 2004 Every mesoscale discussion in 2004

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.