Alert archive / New Mexico / Mesoscale Discussions in 2004

Mesoscale Discussion 2160

September 4, 20044 counties in Arizona; Montezuma County, Colorado; 6 counties in New Mexico

The Storm Prediction Center issued this mesoscale discussion at Sep 4, 2004, 7:55 AM MST for 4 counties in Arizona; Montezuma County, Colorado; 6 counties in New Mexico. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 4, 2004, 7:55 AM MST (14:55 UTC)
Expired
Sep 4, 2004, 10:00 AM MST
In force
2 hr
Issued by
the Storm Prediction Center

Counties Apache County, AZ, Gila County, AZ, Graham County, AZ, Greenlee County, AZ, Montezuma County, CO, Catron County, NM, Cibola County, NM, McKinley County, NM, Rio Arriba County, NM, San Juan County, NM, Sandoval County, NM

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 14:58 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

Phoenix, AZ (KPSR), launched 12:00Z, 2.9 hours before the alert went out and 261 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-pSkew-T log-p diagram, Phoenix, AZ at 12:00Z on 2004-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1274 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phoenix, AZ at 12:00Z on 2004-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1274 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

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Nearby

Mesoscale Discussions in New Mexico, 2004Mesoscale Discussions in Arizona, 2004Mesoscale Discussions in Colorado, 2004Every 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.