Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 244

March 19, 20169 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2016, 12:34 AM CDT for 9 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Mar 19, 2016, 12:34 AM CDT (05:34 UTC)
Expired: Mar 19, 2016, 2:00 AM CDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Brooks County, TX, Hidalgo 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), 101 km from the middle of the area, began a volume at 05:34 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

Corpus Christi, TX (KCRP), launched 00:00Z, 5.6 hours before the alert went out and 104 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: 2025 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: -7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

609 
ACUS11 KWNS 190535
SWOMCD
SPC MCD 190534 
TXZ000-190700-

MESOSCALE DISCUSSION 0244
NWS STORM PREDICTION CENTER NORMAN OK
1234 AM CDT SAT MAR 19 2016

AREAS AFFECTED...DEEP SOUTH TX

CONCERNING...SEVERE THUNDERSTORM WATCH 49...

VALID 190534Z - 190700Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 49
CONTINUES.

SUMMARY...FAST-MOVING BOW WITH A HISTORY OF PRODUCING SEVERE WIND
GUSTS /56-KT WIND GUST AT ALICE TX AT 0502Z/ HAS ACCELERATED SINCE
0430Z...AND IS EXPECTED TO MOVE OFF THE SOUTH TX COAST BY 06Z. 
STRONG...DAMAGING WINDS WILL REMAIN LIKELY AS THIS BOW MOVES THROUGH
CORPUS CHRISTI AND KINGSVILLE BETWEEN NOW AND 0545Z.

LARGE HAIL AND STRONG WIND GUSTS WILL BE POSSIBLE WITH THE STORMS
LOCATED ALONG AND ON EITHER SIDE OF THE LOWER RIO GRANDE VALLEY.

DISCUSSION...MOSAIC RADAR IMAGERY SHOWED A WELL-DEFINED FAST-MOVING
BOW ECHO /AT 46-50 KT TOWARD THE EAST/.  GIVEN THE EVOLUTION OF THIS
STORM STRUCTURE WITH A REAR-INFLOW JET AND RESIDUAL MODERATE
INSTABILITY WITH EFFECTIVE BULK SHEAR OF 40-50 KT...DAMAGING WINDS
ARE EXPECTED AS THE MAIN THREAT AS THIS BOW MOVES TOWARD THE COAST
AND OFFSHORE BY 06Z.

MEANWHILE...FARTHER SOUTH INTO STARR COUNTY AND ACROSS THE
INTERNATIONAL BORDER INTO MEXICO...A SUPERCELL ON THE TX SIDE AND
MULTICELL STORM STRUCTURES IN MEXICO SHOULD PRODUCE LARGE HAIL AND
STRONG WIND GUSTS GIVEN THE SUFFICIENT CAPE/SHEAR PARAMETER SPACE.

..PETERS.. 03/19/2016

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CRP...BRO...

LAT...LON   26719923 27169849 27359824 27999806 28169771 28079722
            27689667 27039694 26609686 26369719 26109768 26069811
            26229876 26459916 26719923

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 18, 7:06 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Gregg, Harrison, Marion and 4 more	54 min
Mar 18, 7:34 PM CDT	Mesoscale Discussion	SPC	Bee, Brooks, Duval, Goliad, Hidalgo, Jim Hogg and 7 more	116 min
Mar 18, 8:53 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 23 more	67 min
Mar 18, 11:11 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Duval, Hidalgo, Jim Hogg, Jim Wells, Kenedy and 4 more	5 hr
Mar 19, 2:38 AM CDT	Mesoscale Discussion	SPC	Cameron, Hidalgo, Willacy	67 min

Nearby

Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.