From the Emergency Alert System:

Event: SEVERE THUNDERSTORM WARNING 

Levels: Immediate - Severe - Observed

Expires: 15:00 PDT on 2013-08-21

From: NATIONAL WEATHER SERVICE EUREKA CA

Headline: SEVERE THUNDERSTORM WARNING - NWS EUREKA CA

Description: THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR… HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA… TRINITY COUNTY IN NORTHWEST CALIFORNIA… * UNTIL 300 PM PDT * AT 214 PM PDT… NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER HUMBOLDT COUNTY…OR 26 MILES SOUTH OF WILLOW CREEK…AND MOVING NORTHWEST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS… &&

Instructions: THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH…PREPARE IMMEDIATELY FOR DAMAGING WINDS… DESTRUCTIVE HAIL… AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER… PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.