Alert archive / California / Special Weather Statements in 2021
Special Weather Statement, NWS San Diego, CA
NWS San Diego, CA issued this special weather statement at Aug 29, 2021, 2:35 PM PDT for San Diego County, California. It was in force for 40 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 29, 2021, 2:35 PM PDT (21:35 UTC)
- Expired
- Aug 29, 2021, 3:15 PM PDT
- In force
- 40 min
- Issued by
- NWS San Diego, CA
- Hail
- 0.25 in
- Wind
- 40
County San Diego County, CA
The radar
The San Diego radar (KNKX), 30 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 49 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
- 2595 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before this special weather statement went out at Aug 29, 2:04 PM PDT, 31 minutes earlier.
Area forecast discussion, Aug 29, 2:04 PM PDT, 31 minutes before
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</html>In the hours before
Special weather statement, Aug 29, 12:54 PM PDT, 1 hour 41 minutes before
Special Weather Statement National Weather Service San Diego CA 1254 PM PDT Sun Aug 29 2021 CAZ048-050-056-058-292045- San Diego County Mountains CA-Riverside County Mountains CA- San Bernardino and Riverside County Valleys-The Inland Empire CA- San Diego County Inland Valleys CA- 1254 PM PDT Sun Aug 29 2021 ...A strong thunderstorm will impact portions of Riverside and north central San Diego Counties through 145 PM PDT... At 1253 PM PDT, NWS doppler radar was tracking a strong thunderstorm over Highway 79 between Warner Springs and Oak Grove, or 13 miles south of Anza. This storm was nearly stationary. HAZARD...Strong thunderstorm wind to 50 mph and heavy rain. SOURCE...Radar indicated. IMPACT...Minor wind damage, low visibility and brief heavy rain. Locations impacted include... Valley Center, Aguanga, Warner Springs, Palomar Mountain, Hwy 79 Between Oak Grove And Aguanga, Hwy 79 Between Warner Springs And Oak Grove, Hwy 79 Between Santa Ysabel And Warner Springs, Lake Henshaw, Palomar Mountain State Park, S7 - East Grade Rd, Hwy S2 Between Hwy 79 And Hwy 78, La Jolla Indian Reservation, Oak Grove, Santa Ysabel Indian Reservation, Rincon Indian Reservation, Pauma Valley and Los Coyotes Indian Reservation. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. && LAT...LON 3347 11660 3315 11658 3325 11696 3351 11688 TIME...MOT...LOC 1953Z 240DEG 48KT 3337 11674 MAX HAIL SIZE...0.00 IN MAX WIND GUST...<30 MPH Tardy
Special weather statement, Aug 29, 2:35 PM PDT, 0 minutes before
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</html>The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 12:49 PM PDT | Areal Flood Advisory | SGX | Riverside | 3 hr |
| Aug 29, 12:54 PM PDT | Special Weather Statement | SGX | San Diego | 51 min |
| Aug 29, 1:18 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
| Aug 29, 3:51 PM PDT | Areal Flood Advisory | SGX | San Diego | 114 min |
| Aug 29, 4:24 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 3 hr |
Nearby
Special Weather Statements in California, 2021Every special weather statement in 2021
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.