Alert archive / California / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 13, NWS Eureka, CA
NWS Eureka, CA issued this severe thunderstorm warning at Sep 6, 2017, 4:51 PM PDT for Humboldt County, Trinity County, California. It was in force for 9 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2017, 4:51 PM PDT (23:51 UTC)
- Expired
- Sep 6, 2017, 5:00 PM PDT
- In force
- 9 min
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 69 km from the middle of the area, began a volume at 23:51 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.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 11.9 hours before the alert went out and 194 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1836 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
591 WUUS56 KEKA 062351 SVREKA CAC023-105-070000- /O.NEW.KEKA.SV.W.0013.170906T2351Z-170907T0000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Eureka CA 451 PM PDT WED SEP 6 2017 The National Weather Service in Eureka California has issued a * Severe Thunderstorm Warning for... West central Trinity County in northwestern California... East central Humboldt County in northwestern California... * Until 500 PM PDT * At 450 PM PDT, a severe thunderstorm was located 7 miles northwest of Hyampom, or 17 miles south of Willow Creek, moving north at 25 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... South of Willow Creek. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and 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 4064 12343 4061 12354 4081 12370 4086 12350 TIME...MOT...LOC 2350Z 163DEG 22KT 4071 12352 HAIL...1.00IN WIND...<50MPH $$ RL/KR
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 8:35 PM PDT | Special Weather Statement | EKA | Humboldt | 25 min |
| Sep 5, 9:43 PM PDT | Fire Weather Watch | EKA | 15 hr | |
| Sep 6, 4:44 AM PDT | Red Flag Warning | EKA | 29 hr | |
| Sep 6, 4:35 PM PDT | Special Weather Statement | EKA | Trinity | 10 min |
| Sep 6, 4:56 PM PDT | Special Weather Statement | EKA | Del Norte | 19 min |
Nearby
Severe Thunderstorm Warnings in California, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.