Alert archive / Arizona / Special Weather Statements in 2018

Special Weather Statement, NWS Tucson, AZ

August 3, 2018Cochise County, Arizona

NWS Tucson, AZ issued this special weather statement at Aug 3, 2018, 2:18 PM MST for Cochise County, Arizona. It was in force for 42 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 3, 2018, 2:18 PM MST (21:18 UTC)
Expired: Aug 3, 2018, 3:00 PM MST
In force: 42 min
Issued by: NWS Tucson, AZ

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 21:18 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 (KDMA), launched 12:00Z, 9.3 hours before the alert went out and 106 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: 828 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 2026 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Tucson, AZ wrote its last area forecast discussion before this special weather statement went out at Aug 3, 9:50 AM MST, 4 hours 28 minutes earlier.

Area forecast discussion, Aug 3, 9:50 AM MST, 4 hours 28 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.
      </p>
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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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In the hours before

Special weather statement, Aug 3, 2:18 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Tucson AZ
218 PM MST FRI AUG 3 2018

AZZ507-513-032200-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-
218 PM MST FRI AUG 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COCHISE COUNTY UNTIL
300 PM MST...

At 217 PM MST, Doppler radar was tracking a strong thunderstorm just
east of Sierra Vista, moving southeast at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Sierra Vista, Bisbee, Sierra Vista Southeast, Palominas, Hereford and
Junction Of Highways 80 And 90.

LAT...LON 3151 11029 3164 11014 3148 10989 3133 11009
      3133 11017
TIME...MOT...LOC 2117Z 318DEG 9KT 3153 11018

EC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 5:01 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Aug 2, 5:13 PM MST	Special Weather Statement	TWC	Pima	32 min
Aug 2, 5:19 PM MST	Dust Storm Advisory	TWC	Pima, Pinal	26 min
Aug 2, 5:29 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Aug 2, 5:37 PM MST	Dust Storm Warning	TWC	Pima, Pinal	68 min
Aug 2, 6:37 PM MST	Special Weather Statement	TWC	Pinal	38 min
Aug 3, 2:45 PM MST	Areal Flood Advisory	TWC	Graham	60 min
Aug 3, 3:03 PM MST	Special Weather Statement	TWC	Cochise	42 min
Aug 3, 3:07 PM MST	Flash Flood Warning	TWC	Graham	3 hr

Nearby

Special Weather Statements in Arizona, 2018 Every special weather statement in 2018

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.