Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 943

June 3, 20099 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2009, 7:42 PM CDT for 9 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2009, 7:42 PM CDT (00:42 UTC)
Expired: Jun 3, 2009, 9:15 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Brooks County, TX, Cameron County, TX, Hidalgo County, TX, Jim Hogg County, TX, Kenedy County, TX, Kleberg County, TX, Starr County, TX, Willacy County, TX, Zapata County, TX

The radar

The Brownsville radar (KBRO), 105 km from the middle of the area, began a volume at 00:41 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 0.7 hours before the alert went out and 108 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: 1427 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1399 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
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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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 1:41 PM CDT	Mesoscale Discussion	SPC	Dallam, Hartley	64 min
Jun 4, 2:27 PM CDT	Severe Thunderstorm Watch	SPC	Dallam, Deaf Smith, Hartley, Moore, Oldham, Potter and 2 more	8 hr
Jun 4, 3:26 PM CDT	Mesoscale Discussion	SPC	Culberson, Jeff Davis, Loving, Reeves, Ward	64 min
Jun 4, 6:16 PM CDT	Mesoscale Discussion	SPC	Dallam, Deaf Smith, Hartley, Moore, Oldham, Potter and 2 more	89 min
Jun 4, 6:42 PM CDT	Severe Thunderstorm Watch	SPC	Bailey, Castro, Cochran, Hale, Hockley, Lamb and 6 more	5 hr

Nearby

Mesoscale Discussions in Texas, 2009 Every mesoscale discussion in 2009

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.