Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 2177

September 12, 200510 counties in Kansas; 4 counties in Oklahoma; 16 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 12, 2005, 5:20 PM CDT for 10 counties in Kansas; 4 counties in Oklahoma; 16 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Sep 12, 2005, 5:20 PM CDT (22:20 UTC)
Expired: Sep 12, 2005, 7:15 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center

All 30 counties

Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Hodgeman County, KS, Kiowa County, KS, Meade County, KS, Ness County, KS, Pawnee County, KS, Rush County, KS, Beaver County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Armstrong County, TX, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hemphill County, TX, Lipscomb County, TX, Motley County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 112 km from the middle of the area, began a volume at 22:24 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

Dodge City, (KDDC), launched 12:00Z, 10.3 hours before the alert went out and 230 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: 665 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 775 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 254 m²/s²
0-3 km storm-relative helicity: 266 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

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
Sep 12, 5:31 PM CDT	Mesoscale Discussion	SPC	Jewell, Phillips, Smith	59 min
Sep 12, 5:55 PM CDT	Severe Thunderstorm Watch	SPC	Jewell, Mitchell, Osborne, Smith	4 hr

Nearby

Mesoscale Discussions in Texas, 2005 Mesoscale Discussions in Kansas, 2005 Mesoscale Discussions in Oklahoma, 2005 Every mesoscale discussion in 2005

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.