Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

July 13, 2021

NWS Phoenix, AZ issued this special weather statement at Jul 13, 2021, 5:00 PM MST. It was in force for 45 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 13, 2021, 5:00 PM MST (00:00 UTC)
Expired: Jul 13, 2021, 5:45 PM MST
In force: 45 min
Issued by: NWS Phoenix, AZ

The radar

The Phoenix radar (KIWA), 98 km from the middle of the area, began a volume at 00:02 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 00:00Z, 0.0 hours before the alert went out and 90 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: 1016 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 3063 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 5 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 13, 4:48 PM MST, 12 minutes earlier.

Area forecast discussion, Jul 13, 4:48 PM MST, 12 minutes before

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In the hours before

Local storm report, Jul 13, 4:57 PM MST, 3 minutes before

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Special weather statement, Jul 13, 5:00 PM MST, 0 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 14, 12:57 AM MST	Special Weather Statement	PSR		48 min
Jul 14, 2:19 AM MST	Special Weather Statement	PSR		41 min
Jul 14, 2:58 AM MST	Areal Flood Advisory	PSR	Gila	3 hr
Jul 14, 4:17 AM MST	Special Weather Statement	PSR	Maricopa	43 min
Jul 14, 4:49 AM MST	Special Weather Statement	PSR	Maricopa	41 min
Jul 14, 5:04 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 14, 5:16 AM MST	Flash Flood Warning	PSR	Maricopa	4 hr
Jul 14, 5:26 AM MST	Special Weather Statement	PSR		49 min
Jul 14, 6:11 AM MST	Special Weather Statement	PSR	Pinal	34 min
Jul 14, 6:59 AM MST	Special Weather Statement	PSR	Pinal	31 min
Jul 14, 7:19 AM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	116 min
Jul 14, 8:18 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 14, 8:42 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 14, 9:28 AM MST	Areal Flood Warning	PSR	Pinal	2 hr
Jul 14, 11:06 AM MST	Flash Flood Watch	PSR	Gila, Maricopa, Pinal	60 hr

Nearby

Special Weather Statements in Arizona, 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.