Alert archive / Arizona / Mesoscale Discussions in 2003

Mesoscale Discussion 2156

August 14, 20037 counties in Arizona

The Storm Prediction Center issued this mesoscale discussion at Aug 14, 2003, 7:02 PM MST for 7 counties in Arizona. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Aug 14, 2003, 7:02 PM MST (02:02 UTC)
Expired: Aug 14, 2003, 8:30 PM MST
In force: 88 min
Issued by: the Storm Prediction Center

Counties Coconino County, AZ, Gila County, AZ, Maricopa County, AZ, Navajo County, AZ, Pima County, AZ, Pinal County, AZ, Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 9 km from the middle of the area, began a volume at 02:03 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 2.0 hours before the alert went out and 83 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: 603 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1999 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

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
Aug 14, 8:19 PM MST	Mesoscale Discussion	SPC	Maricopa, Yavapai	56 min
Aug 15, 12:20 PM MST	Mesoscale Discussion	SPC	Coconino	115 min

Nearby

Mesoscale Discussions in Arizona, 2003 Every mesoscale discussion in 2003

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.