Alert archive / California / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 13, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 2, 2017, 1:21 PM PDT for San Diego County, California. It was in force for 54 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
- Aug 2, 2017, 1:21 PM PDT (20:21 UTC)
- Expired
- Aug 2, 2017, 2:15 PM PDT
- In force
- 54 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County San Diego County, CA
The radar
The San Diego radar (KNKX), 51 km from the middle of the area, began a volume at 20:21 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
San Diego, CA (KNKX), launched 12:00Z, 8.4 hours before the alert went out and 69 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
- 229 J/kg
- Mixed-layer CIN
- -475 J/kg
- Mixed-layer LCL
- 1446 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
202 WUUS56 KSGX 022021 SVRSGX CAC073-022115- /O.NEW.KSGX.SV.W.0013.170802T2021Z-170802T2115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service San Diego CA 121 PM PDT WED AUG 2 2017 The National Weather Service in San Diego has issued a * Severe Thunderstorm Warning for... North central San Diego County in southwestern California... * Until 215 PM PDT * At 119 PM PDT, a severe thunderstorm was located over Palomar Mountain State Park, and is nearly stationary. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Expect damage to power lines and trees. * Locations impacted include... Palomar Mountain State Park, Palomar Mountain, Hwy 79 Between Oak Grove And Aguanga, Oak Grove, Pauma Valley, La Jolla Indian Reservation and Pauma Indian Reservation. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3330 11677 3328 11695 3343 11699 3343 11679 TIME...MOT...LOC 2019Z 100DEG 2KT 3336 11689 HAIL...0.75IN WIND...60MPH $$ Albright
1 follow-up statement
749 WWUS56 KSGX 022036 SVSSGX Severe Weather Statement National Weather Service San Diego CA 136 PM PDT WED AUG 2 2017 CAC073-022115- /O.CON.KSGX.SV.W.0013.000000T0000Z-170802T2115Z/ San Diego CA- 136 PM PDT WED AUG 2 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM PDT FOR NORTH CENTRAL SAN DIEGO COUNTY... At 134 PM PDT, a severe thunderstorm remained over Palomar Mountain State Park, and is nearly stationary. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to power lines and trees. Locations impacted include... Palomar Mountain State Park, Palomar Mountain, Hwy 79 Between Oak Grove And Aguanga, Oak Grove, Pauma Valley, La Jolla Indian Reservation and Pauma Indian Reservation. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3330 11677 3328 11695 3343 11699 3343 11679 TIME...MOT...LOC 2034Z 100DEG 2KT 3336 11690 HAIL...0.75IN WIND...60MPH $$ Albright
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 12:04 PM PDT | Special Weather Statement | SGX | San Diego | 41 min |
| Aug 2, 12:38 PM PDT | Special Weather Statement | SGX | San Diego | 37 min |
| Aug 2, 12:42 PM PDT | Special Weather Statement | SGX | San Diego | 33 min |
| Aug 2, 1:07 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
| Aug 2, 1:17 PM PDT | Areal Flood Advisory | SGX | San Diego | 3 hr |
| Aug 2, 1:43 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 47 min |
| Aug 2, 2:25 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 2, 2:53 PM PDT | Special Weather Statement | SGX | San Diego | 37 min |
| Aug 2, 3:25 PM PDT | Special Weather Statement | SGX | San Diego | 35 min |
| Aug 2, 3:50 PM PDT | Special Weather Statement | SGX | San Diego | 40 min |
| Aug 2, 3:59 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 46 min |
| Aug 2, 4:09 PM PDT | Areal Flood Advisory | SGX | San Diego | 2 hr |
| Aug 2, 4:38 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 112 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.