Alert archive / California / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 13, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 16, 2018, 1:58 PM PDT for Riverside County, California. It was in force for 62 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 16, 2018, 1:58 PM PDT (20:58 UTC)
- Expired
- Aug 16, 2018, 3:00 PM PDT
- In force
- 62 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Riverside County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.0 hours before the alert went out and 132 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
- 810 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
287
WUUS56 KSGX 162058
SVRSGX
CAC065-162200-
/O.NEW.KSGX.SV.W.0013.180816T2058Z-180816T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Diego CA
158 PM PDT THU AUG 16 2018
The National Weather Service in San Diego has issued a
* Severe Thunderstorm Warning for...
Riverside County in southern California...
* Until 300 PM PDT
* At 158 PM PDT, a severe thunderstorm was located over Banning, or
near Yucaipa, moving northeast at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Yucaipa, western Beaumont, Banning, Calimesa, Cherry Valley and
Morongo Indian Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3390 11691 3392 11702 3399 11710 3401 11707
3401 11693 3403 11693 3403 11685
TIME...MOT...LOC 2058Z 224DEG 15KT 3399 11696
HAIL...0.75IN
WIND...60MPH
$$
JMB2 follow-up statements
492
WWUS56 KSGX 162134
SVSSGX
Severe Weather Statement
National Weather Service San Diego CA
234 PM PDT THU AUG 16 2018
CAC065-162200-
/O.CON.KSGX.SV.W.0013.000000T0000Z-180816T2200Z/
Riverside CA-
234 PM PDT THU AUG 16 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM PDT
FOR RIVERSIDE COUNTY...
At 233 PM PDT, a severe thunderstorm was located over southwestern
Mount San Gorgonio, moving northeast at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Heavy rain is also ongoing in the area and a flash flood warning is
also in effect.
Locations impacted include...
Yucaipa, western Beaumont, Banning, Calimesa, Cherry Valley and
Morongo Indian Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3390 11691 3392 11702 3399 11710 3401 11707
3401 11693 3403 11693 3403 11685
TIME...MOT...LOC 2133Z 224DEG 15KT 3410 11684
HAIL...0.75IN
WIND...60MPH
$$
JMB224
WWUS56 KSGX 162155
SVSSGX
Severe Weather Statement
National Weather Service San Diego CA
255 PM PDT THU AUG 16 2018
CAC065-162204-
/O.EXP.KSGX.SV.W.0013.000000T0000Z-180816T2200Z/
Riverside CA-
255 PM PDT THU AUG 16 2018
...THE SEVERE THUNDERSTORM WARNING FOR RIVERSIDE COUNTY WILL EXPIRE
AT 300 PM PDT...
The severe thunderstorm which prompted the warning has weakened in
the Cherry Valley area. Therefore, the warning will be allowed to
expire.
LAT...LON 3390 11691 3392 11702 3399 11710 3401 11707
3401 11693 3403 11693 3403 11685
TIME...MOT...LOC 2154Z 224DEG 15KT 3415 11679
$$
JMBThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:25 PM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 25 hr |
| Aug 16, 12:45 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Aug 16, 1:20 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 3 hr |
| Aug 16, 1:37 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Aug 16, 2:30 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 77 min |
| Aug 16, 2:34 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 56 min |
| Aug 16, 3:04 PM PDT | Flash Flood Warning | SGX | San Bernardino | 68 min |
| Aug 16, 3:09 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 53 min |
Nearby
Severe Thunderstorm Warnings in California, 2018Every severe thunderstorm warning in 2018
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.