Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 747

May 28, 20144 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 28, 2014, 2:20 PM CDT for 4 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
May 28, 2014, 2:20 PM CDT (19:20 UTC)
Expired
May 28, 2014, 4:15 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Cameron County, TX, Hidalgo County, TX, Starr County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 87 km from the middle of the area, began a volume at 19:25 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 12:00Z, 7.3 hours before the alert went out and 90 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-pSkew-T log-p diagram, Brownsville Intl, TX at 12:00Z on 2014-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1349 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 12:00Z on 2014-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1349 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
665 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.7
Supercell composite
6.6

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.

IssuedProductOfficeCountiesLasted
May 27, 8:03 PM CDTMesoscale DiscussionSPCBell, Bosque, Burnet, Coryell, Falls, Hamilton and 4 more57 min
May 27, 8:45 PM CDTMesoscale DiscussionSPCAtascosa, Bastrop, Bee, Bexar, Blanco, Caldwell and 16 more60 min
May 28, 2:50 AM CDTMesoscale DiscussionSPCChambers, Galveston, Harris85 min

Nearby

Mesoscale Discussions in Texas, 2014Every mesoscale discussion in 2014

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.