SPC AC 301250
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0650 AM CST Sun Jan 30 2022
Valid 301300Z - 311200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected through tonight.
...Synopsis/Discussion...
A progressive mid/upper-level pattern is expected this period, with
a gradual eastward shift and deamplification of the eastern North
American troughing underway, and continuing through day-2. A series
of low-amplitude shortwaves will continue to traverse the associated
northwesterly to cyclonic flow across the Great Lakes, Ohio Valley
and central/northern Appalachians. The associated strong surface
cold front has penetrated well into the Caribbean, and a post-
frontal, continental/polar anticyclone will move slowly eastward
over the Gulf and FL. This will help to maintain a stable boundary
layer over the CONUS east of the Rockies, though elevated thunder
potential will develop over parts of west and central TX, and
southeastern NM, ahead of a southern-stream mid/upper cyclone now
centered over southwestern AZ.
The 500-mb low over AZ will move eastward to south-central NM near
LRU/HMN by 00Z, then east-southeastward to the INK/MAF area by 12Z
tomorrow. Beneath DCVA aloft and strongly difluent mid/upper flow
preceding the low, the western part of a regime of elevated warm and
moist advection will strengthen in low/middle levels tonight.
Related moistening and destabilization will lead to the development
of midlevel buoyancy extending into icing layers suitable for
lightning generation, with MUCAPE generally in the 100-500 J/kg
range. This will support isolated thunderstorms initially over
parts of the Trans-Pecos/Big Bend/Davis Mountains vicinity and
southeastern NM/southern Llano Estacado this evening, expanding
toward south-central TX by the end of the period. Moisture above
the boundary layer will be greater with southeastward extent over
time tonight, supporting the widely scattered thunderstorm coverage
after 09Z across parts of the Edwards Plateau and southern Hill
Country region, toward parts of the nearby middle TX coastal plain.
..Edwards.. 01/30/2022
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1630Z
|