Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 1787

July 19, 200512 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2005, 10:01 PM CDT for 12 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jul 19, 2005, 10:01 PM CDT (03:01 UTC)
Expired: Jul 19, 2005, 11:30 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center

Counties Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Nueces County, TX, San Patricio County, TX, Starr County, TX, Willacy County, TX

The radar

The Corpus Christi radar (KCRP), 72 km from the middle of the area, began a volume at 03:04 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 648Jul 20, 12:55 AM CDT

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 3.0 hours before the alert went out and 138 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: 1109 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 20, 12:55 AM CDT	Tornado Watch	SPC	Brooks, Cameron, Hidalgo, Kenedy, Starr, Willacy and 1 more	9 hr
Jul 20, 9:24 AM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 5 more	96 min
Jul 20, 9:40 AM CDT	Tornado Watch	SPC	Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 7 more	9 hr
Jul 20, 12:42 PM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 7 more	2 hr
Jul 20, 5:08 PM CDT	Mesoscale Discussion	SPC	Bee, Brooks, Duval, Hidalgo, Jim Hogg, Jim Wells and 9 more	2 hr

Nearby

Mesoscale Discussions in Texas, 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.