Alert archive / California / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

July 31, 2021Riverside County, California

NWS Phoenix, AZ issued this special weather statement at Jul 31, 2021, 3:47 PM PDT for Riverside County, California. It was in force for 28 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: Jul 31, 2021, 3:47 PM PDT (22:47 UTC)
Expired: Jul 31, 2021, 4:15 PM PDT
In force: 28 min
Issued by: NWS Phoenix, AZ

County Riverside County, CA

The radar

The San Diego radar (KNKX), 149 km from the middle of the area, began a volume at 22:50 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, 10.8 hours before the alert went out and 169 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: 2352 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 31, 1:15 PM PDT, 2 hours 32 minutes earlier.

Area forecast discussion, Jul 31, 1:15 PM PDT, 2 hours 32 minutes before

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In the hours before

Special weather statement, Jul 31, 2:23 PM PDT, 1 hour 24 minutes before

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Special weather statement, Jul 31, 2:32 PM PDT, 1 hour 15 minutes before

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Special weather statement, Jul 31, 3:03 PM PDT, 44 minutes before

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Special weather statement, Jul 31, 3:18 PM PDT, 29 minutes before

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Special weather statement, Jul 31, 3:44 PM PDT, 3 minutes before

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Special weather statement, Jul 31, 3:47 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
Jul 30, 5:04 PM PDT	Dust Storm Advisory	PSR	Yuma	41 min
Jul 30, 5:29 PM PDT	Severe Thunderstorm Warning	PSR	Yuma	46 min
Jul 30, 5:39 PM PDT	Areal Flood Advisory	PSR	Yuma	3 hr
Jul 30, 5:44 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Yuma	4 hr
Jul 30, 5:59 PM PDT	Dust Storm Warning	PSR	Yuma	45 min
Jul 30, 6:06 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Yuma	4 hr
Jul 30, 6:51 PM PDT	Severe Thunderstorm Warning	PSR	Yuma	38 min
Jul 30, 7:06 PM PDT	Special Weather Statement	PSR	Pinal	24 min
Jul 30, 7:25 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Yuma	3 hr
Jul 30, 7:32 PM PDT	Areal Flood Advisory	PSR	Yuma	3 hr
Jul 30, 7:51 PM PDT	Special Weather Statement	PSR	Yuma	69 min
Jul 30, 8:02 PM PDT	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 30, 8:29 PM PDT	Dust Storm Advisory	PSR	Maricopa, Pinal	72 min
Jul 30, 8:44 PM PDT	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	61 min
Jul 30, 9:17 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	2 hr
Jul 30, 9:40 PM PDT	Special Weather Statement	PSR	Maricopa	65 min
Jul 30, 10:24 PM PDT	Dust Storm Advisory	PSR	Maricopa, Pinal	43 min
Jul 30, 10:37 PM PDT	Special Weather Statement	PSR	Maricopa	23 min
Jul 30, 10:45 PM PDT	Special Weather Statement	PSR		45 min
Jul 30, 11:54 PM PDT	Special Weather Statement	PSR	Maricopa	51 min
Jul 31, 12:37 AM PDT	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 31, 1:34 AM PDT	Areal Flood Advisory	PSR	Maricopa	4 hr
Jul 31, 1:58 AM PDT	Areal Flood Advisory	PSR	Maricopa, Pinal	4 hr
Jul 31, 3:39 AM PDT	Areal Flood Advisory	PSR	La Paz	4 hr
Jul 31, 2:23 PM PDT	Special Weather Statement	PSR	La Paz	37 min
Jul 31, 3:03 PM PDT	Special Weather Statement	PSR	Gila	27 min
Jul 31, 3:18 PM PDT	Special Weather Statement	PSR	La Paz	27 min
Jul 31, 3:31 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 31, 3:44 PM PDT	Special Weather Statement	PSR	La Paz	31 min
Jul 31, 3:55 PM PDT	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 30, 5:18 PM PDT	Special Weather Statement	PSR	Imperial	72 min
Jul 30, 5:20 PM PDT	Special Weather Statement	PSR	Riverside	70 min
Jul 30, 5:24 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	4 hr
Jul 30, 5:33 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Jul 30, 5:52 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	4 hr
Jul 30, 6:11 PM PDT	Severe Thunderstorm Warning	PSR	Riverside	79 min
Jul 30, 6:31 PM PDT	Special Weather Statement	PSR	Imperial	74 min
Jul 30, 6:49 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside	4 hr
Jul 31, 2:32 PM PDT	Special Weather Statement	PSR	Riverside	28 min
Jul 31, 4:48 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	3 hr

Nearby

Special Weather Statements in California, 2021 Every 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.