Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Phoenix, AZ
NWS Phoenix, AZ issued this special weather statement at Jul 28, 2021, 9:07 AM MST for La Paz County, Arizona. It was in force for 38 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 28, 2021, 9:07 AM MST (16:07 UTC)
- Expired
- Jul 28, 2021, 9:45 AM MST
- In force
- 38 min
- Issued by
- NWS Phoenix, AZ
County La Paz County, AZ
The radar
The Yuma radar (KYUX), 139 km from the middle of the area, began a volume at 16:09 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
Phoenix, AZ (KPSR), launched 12:00Z, 4.1 hours before the alert went out and 229 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
- 438 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1861 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 32 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 Phoenix, AZ wrote its last area forecast discussion before this special weather statement went out at Jul 28, 4:30 AM MST, 4 hours 37 minutes earlier.
Area forecast discussion, Jul 28, 4:30 AM MST, 4 hours 37 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>In the hours before
Special weather statement, Jul 28, 9:07 AM MST, 0 minutes before
Special Weather Statement National Weather Service Phoenix AZ 907 AM MST Wed Jul 28 2021 AZZ530-533-CAZ569-570-281645- Parker Valley AZ-Central La Paz AZ-Palo Verde Valley CA- Chuckwalla Valley CA- 907 AM MST Wed Jul 28 2021 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL LA PAZ AND RIVERSIDE COUNTIES UNTIL 945 AM MST/945 AM PDT/... At 907 AM MST/907 AM PDT/, Doppler radar was tracking a strong thunderstorm 9 miles west of Quartzsite, or 31 miles south of Parker, moving northwest at 15 mph. Wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Blythe, Quartzsite and Ehrenberg. This includes the following highways... AZ Interstate 10 between mile markers 4 and 15. CA Route 95 between mile markers 4 and 24. LAT...LON 3370 11424 3356 11437 3373 11472 3394 11453 TIME...MOT...LOC 1607Z 126DEG 13KT 3368 11438 MP
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 5:45 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 60 min |
| Jul 27, 6:07 PM MST | Special Weather Statement | PSR | 38 min | |
| Jul 27, 6:49 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 41 min |
| Jul 27, 7:44 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Jul 27, 7:50 PM MST | Areal Flood Advisory | PSR | Maricopa, Yuma | 3 hr |
| Jul 27, 8:43 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Jul 28, 11:49 AM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 3 hr |
| Jul 28, 1:39 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 28, 4:52 PM MST | Special Weather Statement | PSR | 23 min | |
| Jul 28, 1:00 PM MST | Areal Flood Advisory | PSR | Riverside, San Bernardino | 20 min |
| Jul 28, 1:20 PM MST | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Jul 28, 2:00 PM MST | Areal Flood Advisory | PSR | Riverside | 42 min |
| Jul 28, 2:42 PM MST | Flash Flood Warning | PSR | Riverside | 2 hr |
| Jul 28, 4:07 PM MST | Areal Flood Advisory | PSR | Riverside | 3 hr |
Nearby
Special Weather Statements in Arizona, 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.