Alert archive / Arizona / Special Weather Statements in 2022

Special Weather Statement, NWS Flagstaff, AZ

August 10, 2022

NWS Flagstaff, AZ issued this special weather statement at Aug 10, 2022, 1:21 PM MST. It was in force for 24 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 10, 2022, 1:21 PM MST (20:21 UTC)
Expired: Aug 10, 2022, 1:45 PM MST
In force: 24 min
Issued by: NWS Flagstaff, AZ
Hail: 0.00 in
Wind: 50

The radar

The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 20:20 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.4 hours before the alert went out and 39 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: 50 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 2849 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -1 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 Flagstaff, AZ wrote its last area forecast discussion before this special weather statement went out at Aug 10, 10:10 AM MST, 3 hours 11 minutes earlier.

Area forecast discussion, Aug 10, 10:10 AM MST, 3 hours 11 minutes before

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<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.
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In the hours before

Special weather statement, Aug 10, 1:21 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
121 PM MST Wed Aug 10 2022

AZZ007-015-102045-
Western Mogollon Rim-Coconino Plateau-
121 PM MST Wed Aug 10 2022

...A strong thunderstorm will impact portions of Coconino County
near Williams through 145 PM MST...

At 121 PM MST, Doppler radar was tracking a strong thunderstorm near
Williams, moving west at 15 mph.

HAZARD...Wind gusts up to 50 mph. Heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Williams, Dogtown Lake Campground and Kaibab Lake Campground.

This includes the following highways...
 Business Interstate 40 between mile markers 163 and 165.
 Interstate 40 between mile markers 151 and 167.
 State Route 64 between mile markers 186 and 195.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3538 11212 3515 11211 3518 11241 3546 11235
TIME...MOT...LOC 2021Z 101DEG 12KT 3528 11223

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Humphreys

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 5:31 PM MST	Special Weather Statement	FGZ		29 min
Aug 9, 5:47 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Navajo	6 hr
Aug 9, 7:14 PM MST	Special Weather Statement	FGZ		31 min
Aug 9, 8:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 10, 10:26 AM MST	Flood Watch	FGZ	Apache, Coconino, Gila, Navajo, Yavapai	11 hr
Aug 10, 12:57 PM MST	Areal Flood Advisory	FGZ	Navajo	3 hr
Aug 10, 1:38 PM MST	Special Weather Statement	FGZ		37 min
Aug 10, 2:00 PM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 10, 3:10 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	4 hr
Aug 10, 3:20 PM MST	Special Weather Statement	FGZ	Yavapai	25 min
Aug 10, 4:32 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr

Nearby

Special Weather Statements in Arizona, 2022 Every special weather statement in 2022

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.