Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 362

April 2, 200925 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2009, 4:42 AM CDT for 25 counties in Texas. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2009, 4:42 AM CDT (09:42 UTC)
Expired: Apr 2, 2009, 5:45 AM CDT
In force: 63 min
Issued by: the Storm Prediction Center

All 25 counties

Anderson County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Falls County, TX, Freestone County, TX, Grimes County, TX, Hays County, TX, Henderson County, TX, Houston County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Navarro County, TX, Polk County, TX, Robertson County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Van Zandt County, TX, Walker County, TX, Washington County, TX

The radar

The Ft Hood radar (KGRK), 96 km from the middle of the area, began a volume at 09:42 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

Fort Worth, TX (KFWD), launched 00:00Z, 9.7 hours before the alert went out and 226 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3418 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 199 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
Apr 2, 1:32 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Bastrop, Bell, Blanco, Bosque and 62 more	58 min
Apr 2, 1:49 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Austin, Bastrop, Bell, Blanco, Bosque and 52 more	7 hr
Apr 2, 4:43 AM CDT	Severe Thunderstorm Watch	SPC	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 17 more	6 hr
Apr 2, 7:36 AM CDT	Mesoscale Discussion	SPC	Angelina, Austin, Brazoria, Chambers, Colorado, Fort Bend and 21 more	54 min

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.