Severe Storm Outlook Narrative (AC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
000
ACUS02 KWNS 240544
SWODY2
SPC AC 240543

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1243 AM CDT FRI OCT 24 2014

VALID 251200Z - 261200Z

...THERE IS A MRGL RISK OF SVR TSTMS FOR PARTS OF NRN CA AND SWRN
ORE...

...SUMMARY...
NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS ARE EXPECTED SATURDAY
ACROSS PARTS OF THE WEST COAST. A COUPLE OF STORMS MAY PRODUCE
LOCALLY DAMAGING WINDS OR A BRIEF TORNADO ACROSS NORTHERN CALIFORNIA
AND SOUTHWEST OREGON FROM LATE MORNING TO MID-AFTERNOON.

...SYNOPSIS...
A POTENT MID-LEVEL TROUGH OVER THE ERN PACIFIC WILL MOVE ASHORE FROM
NRN CA TO WA...DAMPENING AS IT PENETRATES INLAND ACROSS THE
NORTHWEST. ATTENDANT SURFACE CYCLONE SHOULD TRACK FROM THE PACIFIC
NW COAST TOWARDS THE SRN CANADIAN ROCKIES WITH A COLD FRONT SWEEPING
E ACROSS THE NORTHWEST.

...NRN CA TO SWRN ORE...
COOL MID-LEVEL TEMPS ASSOCIATED WITH THE TROUGH WILL LIKELY SUPPORT
SPORADIC CHARGE SEPARATION WITH THE STRONGEST CONVECTIVE
ELEMENTS...MAINLY FROM LATE MORNING THROUGH MID-AFTERNOON. DESPITE
DAMPENING OF THE TROUGH...INITIALLY INTENSE LOW/MID-LEVEL WINDS
/CHARACTERIZED BY 700 MB FLOW AOA 60 KT/ WILL FAVOR ENLARGED
HODOGRAPHS AND RATHER STRONG DEEP-LAYER SHEAR. BUOYANCY WILL REMAIN
MEAGER...SBCAPE AOB 500 J/KG...WITH LIMITED SURFACE INSOLATION. BUT
GIVEN THE STRENGTH OF THE WIND FIELDS...LOCALLY SEVERE WIND GUSTS
AND EVEN A BRIEF TORNADO APPEAR POSSIBLE. BY LATE DAY...INCREASINGLY
VEERED/DIMINISHING WINDS WILL CURTAIL THE MARGINAL SEVERE THREAT.

..GRAMS.. 10/24/2014




USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.