Alert archive / California / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 4, NWS Eureka, CA
NWS Eureka, CA issued this severe thunderstorm warning at Oct 31, 2016, 4:22 PM PDT for Humboldt County, California. It was in force for 23 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Oct 31, 2016, 4:22 PM PDT (23:22 UTC)
- Expired
- Oct 31, 2016, 4:45 PM PDT
- In force
- 23 min
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
County Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 37 km from the middle of the area, began a volume at 23:23 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 31, 4:46 PM PDT | HAIL 0.25 | Honeydew, CA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 11.4 hours before the alert went out and 267 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 12 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 241 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
472 WUUS56 KEKA 312322 SVREKA CAC023-312345- /O.NEW.KEKA.SV.W.0004.161031T2322Z-161031T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EUREKA CA 422 PM PDT MON OCT 31 2016 THE NATIONAL WEATHER SERVICE IN EUREKA CALIFORNIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN HUMBOLDT COUNTY IN NORTHWESTERN CALIFORNIA... * UNTIL 445 PM PDT * AT 421 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 9 MILES SOUTHWEST OF HONEYDEW... AND MOVING NORTHEAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... HONEYDEW. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL... DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4006 12410 4022 12434 4035 12423 4024 12394 TIME...MOT...LOC 2321Z 208DEG 24KT 4012 12423 $$
1 follow-up statement
818 WWUS56 KEKA 312340 SVSEKA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EUREKA CA 440 PM PDT MON OCT 31 2016 CAC023-312345- /O.CON.KEKA.SV.W.0004.000000T0000Z-161031T2345Z/ HUMBOLDT CA- 440 PM PDT MON OCT 31 2016 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR SOUTHWESTERN HUMBOLDT COUNTY... AT 439 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HONEYDEW...MOVING NORTHEAST AT 15 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THE DAMAGING WINDS. LOCATIONS IMPACTED INCLUDE... HONEYDEW. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL... DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4034 12421 4024 12394 4008 12413 4017 12427 TIME...MOT...LOC 2339Z 218DEG 15KT 4019 12415 $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 10:18 AM PDT | Special Marine Warning | EKA | 27 min | |
| Oct 31, 12:37 PM PDT | Special Marine Warning | EKA | 23 min | |
| Oct 31, 12:58 PM PDT | Special Marine Warning | EKA | 17 min | |
| Oct 31, 1:19 PM PDT | Special Marine Warning | EKA | 26 min | |
| Oct 31, 1:44 PM PDT | Special Marine Warning | EKA | 16 min | |
| Oct 31, 3:51 PM PDT | Special Marine Warning | EKA | 24 min | |
| Oct 31, 4:12 PM PDT | Special Marine Warning | EKA | 33 min | |
| Oct 31, 4:50 PM PDT | Special Weather Statement | EKA | Humboldt | 25 min |
Nearby
Severe Thunderstorm Warnings in California, 2016Every severe thunderstorm warning in 2016
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.