672
ACUS11 KWNS 031639
SWOMCD
SPC MCD 031639
ORZ000-CAZ000-031845-
MESOSCALE DISCUSSION 0004
NWS STORM PREDICTION CENTER NORMAN OK
1039 AM CST SAT JAN 03 2026
AREAS AFFECTED...NORTHERN CALIFORNIA AND SOUTHERN OREGON COAST
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 031639Z - 031845Z
PROBABILITY OF WATCH ISSUANCE...20 PERCENT
SUMMARY...STRONG TO SEVERE STORMS MAY INCREASE ALONG THE COAST
THROUGH LATE MORNING/EARLY AFTERNOON.
DISCUSSION...ONGOING CONVECTION OFFSHORE ACROSS PORTIONS OF NORTHERN
CALIFORNIA HAS SHOWN SOME UPTICK IN LIGHTNING ACTIVITY OVER THE LAST
HOUR. IN ADDITION, TRANSIENT WEAK ROTATION HAS BEEN OBSERVED ON
RADAR. WHILE THERMODYNAMIC PROFILES ARE GENERALLY POOR (AROUND 250
J/KG OR LESS OF MLCAPE), SHEAR IS INCREASING WITH THE INCREASING
UPPER-LEVEL FLOW WITH THE TROUGH MOVING CLOSER INLAND. THE VAD
PROFILE FROM BHX (EUREKA, CA) SHOWS 0-1 KM SRH AROUND 420 M2/S2,
WITH FAVORABLE LOW-LEVEL CURVATURE. SOME RISK FOR WATERSPOUTS AND/OR
A TORNADO WILL BE POSSIBLE NEAR THE IMMEDIATE COASTLINE ACROSS
NORTHERN CALIFORNIA INTO FAR SOUTHERN OREGON OVER THE NEXT COUPLE OF
HOURS. IN ADDITION, SOME RISK FOR STRONG TO SEVERE WINDS WILL BE
POSSIBLE. THIS THREAT SHOULD REMAIN LIMITED OWING TO THE POOR
INSTABILITY AND AS SUCH, A WATCH IS NOT ANTICIPATED AT THIS TIME.
..THORNTON/GUYER.. 01/03/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...MFR...EKA...
LAT...LON 39342389 39912360 40192368 42822401 43852408 43582489
43282561 42312600 41472561 40182492 39922480 39562455
39422445 39332429 39312409 39332394 39342389
MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page