Alert archive / Arizona / Mesoscale Discussions in 2012

Mesoscale Discussion 2035

October 12, 2012Apache County, Navajo County, Arizona

The Storm Prediction Center issued this mesoscale discussion at Oct 12, 2012, 2:52 AM MST for Apache County, Navajo County, Arizona. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Oct 12, 2012, 2:52 AM MST (09:52 UTC)
Expired
Oct 12, 2012, 4:45 AM MST
In force
113 min
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Apache County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 108 km from the middle of the area, began a volume at 09:54 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, 9.9 hours before the alert went out and 172 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, Flgstf/Belemont, AZ at 00:00Z on 2012-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 29 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2012-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 141 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
29 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1607 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
141 m²/s²
0-3 km storm-relative helicity
371 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Oct 12, 1:19 AM MSTMesoscale DiscussionSPCApache, Navajo116 min
Oct 12, 9:49 AM MSTMesoscale DiscussionSPCApache86 min

Nearby

Mesoscale Discussions in Arizona, 2012Every mesoscale discussion in 2012

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.