Alert archive / California / Special Weather Statements in 2015

Special Weather Statement, NWS Phoenix, AZ

August 6, 2015Riverside County, California

NWS Phoenix, AZ issued this special weather statement at Aug 6, 2015, 10:54 PM PDT for Riverside County, California. It was in force for 36 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 6, 2015, 10:54 PM PDT (05:54 UTC)
Expired: Aug 6, 2015, 11:30 PM PDT
In force: 36 min
Issued by: NWS Phoenix, AZ

County Riverside County, CA

The radar

The San Diego radar (KNKX), 173 km from the middle of the area, began a volume at 05:56 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 00:00Z, 5.9 hours before the alert went out and 193 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2253 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Phoenix, AZ wrote its last area forecast discussion before this special weather statement went out at Aug 6, 7:03 PM PDT, 3 hours 51 minutes earlier.

Area forecast discussion, Aug 6, 7:03 PM PDT, 3 hours 51 minutes before

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In the hours before

Local storm report, Aug 6, 5:34 PM PDT, 5 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
534 PM MST THU AUG 06 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     DUST STORM       2 WSW TACNA             32.68N 113.98W
08/06/2015                   YUMA               AZ   TRAINED SPOTTER

            VSBY LESS THAN 0.25 MI. AND ESTIMATED WIND GUSTS TO 40
            MPH

&&

EVENT NUMBER PSR1500095

PSR

Special weather statement, Aug 6, 7:14 PM PDT, 3 hours 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
714 PM PDT THU AUG 6 2015

CAZ033-070230-
IMPERIAL COUNTY CA-
714 PM PDT THU AUG 6 2015

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHWESTERN IMPERIAL COUNTY

UNTIL 730 PM PDT

AT 714 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SALTON CITY...MOVING NORTH AT 40 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SALTON CITY...DESERT SHORES...SALTON SEA BEACH...WINONA AND COOLIDGE
SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LOCALLY DENSE BLOWING DUST IS POSSIBLE.  IF YOU ENCOUNTER BLOWING
DUST WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND
PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE.

&&

LAT...LON 3308 11609 3312 11608 3342 11608 3342 11579
      3299 11595 3306 11611
TIME...MOT...LOC 0214Z 187DEG 36KT 3327 11605

18

Special weather statement, Aug 6, 7:46 PM PDT, 3 hours 8 minutes before

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Special weather statement, Aug 6, 9:11 PM PDT, 1 hour 43 minutes before

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Special weather statement, Aug 6, 9:41 PM PDT, 1 hour 13 minutes before

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Special weather statement, Aug 6, 10:54 PM PDT, 0 minutes before

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The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 5:04 PM PDT	Special Weather Statement	PSR	Yuma	26 min
Aug 6, 7:14 PM PDT	Special Weather Statement	PSR		16 min
Aug 6, 9:41 PM PDT	Special Weather Statement	PSR		34 min
Aug 7, 6:06 AM PDT	Special Weather Statement	PSR		39 min
Aug 7, 6:52 AM PDT	Special Weather Statement	PSR	Pinal	38 min
Aug 7, 7:29 AM PDT	Special Weather Statement	PSR		46 min
Aug 7, 11:41 AM PDT	Special Weather Statement	PSR	Gila	49 min
Aug 7, 11:44 AM PDT	Special Weather Statement	PSR	Gila	46 min
Aug 7, 11:51 AM PDT	Special Weather Statement	PSR	Gila	54 min
Aug 7, 11:56 AM PDT	Severe Thunderstorm Warning	PSR	Gila	49 min
Aug 7, 12:21 PM PDT	Areal Flood Advisory	PSR	Gila	3 hr
Aug 7, 12:29 PM PDT	Special Weather Statement	PSR	Gila	61 min
Aug 7, 12:53 PM PDT	Special Weather Statement	PSR	Gila	82 min
Aug 7, 1:25 PM PDT	Flash Flood Warning	PSR	Gila	3 hr
Aug 7, 1:54 PM PDT	Blowing Dust Advisory	PSR		2 hr
Aug 7, 2:16 PM PDT	Flash Flood Warning	PSR	Gila	3 hr
Aug 7, 2:22 PM PDT	Special Weather Statement	PSR	Gila	53 min
Aug 7, 2:28 PM PDT	Severe Thunderstorm Warning	PSR	Pinal	17 min
Aug 7, 3:19 PM PDT	Special Weather Statement	PSR	Pinal	41 min
Aug 7, 4:20 PM PDT	Special Weather Statement	PSR		25 min
Aug 7, 4:47 PM PDT	Special Weather Statement	PSR	Maricopa	43 min
Aug 6, 7:26 PM PDT	Severe Thunderstorm Warning	PSR	Imperial, Riverside	19 min
Aug 6, 7:46 PM PDT	Special Weather Statement	PSR	Riverside	29 min
Aug 6, 9:11 PM PDT	Special Weather Statement	PSR	Riverside	34 min
Aug 6, 9:27 PM PDT	Severe Thunderstorm Warning	PSR	Riverside, San Bernardino	33 min
Aug 7, 12:46 AM PDT	Areal Flood Advisory	PSR	Riverside, San Bernardino	3 hr

Nearby

Special Weather Statements in California, 2015 Every special weather statement in 2015

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.