Severe Weather Outlook

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Outlook for Saturday, December 21

Outlook Summary

Isolated thunderstorms are possible this morning into early afternoon across parts of coastal Oregon and northern California.

Outlook Images

overview

tornado low

wind low

hail low

Detailed Outlook

SPC AC 211250

Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0650 AM CST Sat Dec 21 2024

Valid 211300Z - 221200Z

NO SEVERE THUNDERSTORM AREAS FORECAST

### SUMMARY

Isolated thunderstorms are possible this morning into early afternoon across parts of coastal Oregon and northern California.

Coastal OR/northern CA

A potent mid to upper-level shortwave trough will move ashore the northern CA/OR coast and continue northeastward into the southern Canadian Rockies/northern Rockies vicinity through late tonight. Weak thunderstorm activity embedded within a warm-air advection rain shield will continue moving into the coastal range mountains this morning before outrunning the inland penetration of scant instability. The corridor of thunderstorms will probably shift north along the coast into OR by midday into the early afternoon in association with the mid-level cold pocket encroaching on the OR coast. Elsewhere, quiescent weather or stable conditions will preclude thunderstorm development over the remainder of the contiguous United States.

..Smith/Goss.. 12/21/2024

CLICK TO GET WUUS01 PTSDY1 PRODUCT

NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1630Z

National Risk Overview

Saturday, December 21: TORNADO: low; HAIL: low; WIND: low
Sunday, December 22: TORNADO: low; HAIL: low; WIND: low
Monday, December 23: ANY SEVERE: low
Tuesday, December 24: ANY SEVERE: low / uncertain
Wednesday, December 25: ANY SEVERE: low / uncertain
Thursday, December 26: ANY SEVERE: low / uncertain
Friday, December 27: ANY SEVERE: low / uncertain
Saturday, December 28: ANY SEVERE: low / uncertain

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