Alert archive / Arizona / Flood Watches in 2022

Flood Watch 4, NWS Tucson, AZ

August 17, 20226 counties in Arizona

NWS Tucson, AZ issued this flood watch at Aug 17, 2022, 1:23 PM MST for 6 counties in Arizona. It took effect at Aug 19, 2022, 11:00 AM MST. It was in force for 42 hr.

The area

The counties it named.

The facts

Issued: Aug 17, 2022, 1:23 PM MST (20:23 UTC)
In effect from: Aug 19, 2022, 11:00 AM MST
Expired: Aug 21, 2022, 5:00 AM MST
In force: 42 hr
Issued by: NWS Tucson, AZ
Flood severity: None

Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 61 km from the middle of the area, began a volume at 20:23 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

Tuscon, AZ (KTUS), launched 12:00Z, 8.4 hours before the alert went out and 49 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: 345 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1589 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tucson, AZ wrote its last area forecast discussion before this flood watch went out at Aug 17, 10:45 AM MST, 2 hours 38 minutes earlier.

Area forecast discussion, Aug 17, 10:45 AM MST, 2 hours 38 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 5:22 PM MST	Special Weather Statement	TWC	Santa Cruz	38 min
Aug 16, 5:38 PM MST	Dust Storm Advisory	TWC	Cochise, Graham	67 min
Aug 16, 5:58 PM MST	Special Weather Statement	TWC		32 min
Aug 16, 6:14 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	31 min
Aug 16, 6:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	29 min
Aug 16, 8:15 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 16, 9:40 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	35 min
Aug 16, 9:49 PM MST	Special Weather Statement	TWC	Cochise	56 min
Aug 16, 10:46 PM MST	Special Weather Statement	TWC	Cochise	59 min
Aug 17, 2:34 PM MST	Special Weather Statement	TWC		41 min
Aug 17, 2:44 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 17, 3:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	117 min
Aug 17, 3:32 PM MST	Areal Flood Advisory	TWC	Pima	118 min
Aug 17, 3:50 PM MST	Special Weather Statement	TWC		40 min
Aug 17, 4:10 PM MST	Severe Thunderstorm Warning	TWC	Pima	28 min

Nearby

Flood Watches in Arizona, 2022 Every flood watch 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.