Press "Enter" to skip to content

SPC MD 1571

MD 1571 CONCERNING TORNADO WATCH 465… FOR UPPER TEXAS COAST

MD 1571 Image


Mesoscale Discussion 1571
NWS Storm Prediction Center Norman OK
0117 AM CDT Sat Aug 26 2017

Areas affected...Upper Texas Coast

Concerning...Tornado Watch 465...

Valid 260617Z - 260645Z

The severe weather threat for Tornado Watch 465 continues.

SUMMARY...The highest potential for tornadic supercells will likely
be within 2 corridors either side of Galveston Bay (Brazoria/Fort
Bend and Chambers Counties) for the next 1-2 hours.  A new tornado
watch will be issued before 0700 UTC.

DISCUSSION...Latest subjective surface mesoanalysis indicates the 80
degree F isotherm encompasses Brazoria county northeast into
Chambers county.  The northwest area of a plume of 78 degree F
dewpoints protrudes northwest from the northwest Gulf of Mexico into
the immediate coastal area of Brazoria county.  The latest RAP
forecast sounding appears to be representative of the surface and
around 1400 J/kg MLCAPE is noted.  When inputting storm motion (135
degrees at 35-kt), the KHGX VAD indicates around 200 m2/s2 0-1 km
SRH.  With robust updrafts implied by the convective structures
(echo tops 35-40k ft), the environment will continue to be favorable
for low-level mesocyclones and a tornado risk over the next 1-2
hours.

..Smith.. 08/26/2017

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...LCH...HGX...

LAT...LON   28929522 29379547 29869426 29459397 28929522 

Read more

from SPC Mesoscale Discussions http://bit.ly/2wPzb9X

Be First to Comment

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.