Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 330

April 10, 20204 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2020, 2:27 AM CDT for 4 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Apr 10, 2020, 2:27 AM CDT (07:27 UTC)
Expired: Apr 10, 2020, 4:00 AM CDT
In force: 93 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Hidalgo County, TX, Jim Hogg County, TX, Starr County, TX, Zapata County, TX

The radar

The Brownsville radar (KBRO), 162 km from the middle of the area, began a volume at 07:31 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, 7.5 hours before the alert went out and 164 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: 2493 J/kg
Mixed-layer CIN: -282 J/kg
Mixed-layer LCL: 824 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -65 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 7:59 PM CDT	Mesoscale Discussion	SPC	Aransas, Atascosa, Bee, Brooks, Calhoun, Cameron and 23 more	2 hr
Apr 10, 2:19 PM CDT	Mesoscale Discussion	SPC	Crane, Jeff Davis, Pecos, Reeves, Upton, Ward	86 min
Apr 10, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	Brewster, Crane, Crockett, Ector, Jeff Davis, Pecos and 8 more	7 hr
Apr 10, 6:52 PM CDT	Mesoscale Discussion	SPC	Andrews, Crane, Ector, Glasscock, Howard, Irion and 7 more	113 min

Nearby

Mesoscale Discussions in Texas, 2020 Every mesoscale discussion in 2020

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.