Alert archive / Arizona / Special Weather Statements in 2017

Special Weather Statement, NWS Tucson, AZ

August 23, 2017Santa Cruz County, Arizona

NWS Tucson, AZ issued this special weather statement at Aug 23, 2017, 1:09 PM MST for Santa Cruz County, Arizona. It was in force for 51 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 23, 2017, 1:09 PM MST (20:09 UTC)
Expired: Aug 23, 2017, 2:00 PM MST
In force: 51 min
Issued by: NWS Tucson, AZ

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 29 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 61 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: 906 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 2087 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 11 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 Tucson, AZ wrote its last area forecast discussion before this special weather statement went out at Aug 23, 9:57 AM MST, 3 hours 12 minutes earlier.

Area forecast discussion, Aug 23, 9:57 AM MST, 3 hours 12 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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In the hours before

Special weather statement, Aug 23, 11:58 AM MST, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Tucson AZ
1158 AM MST WED AUG 23 2017

AZZ503-507-513-231945-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-
1158 AM MST WED AUG 23 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COCHISE AND EAST
CENTRAL SANTA CRUZ COUNTIES UNTIL 1245 PM MST...

At 1158 AM MST, strong thunderstorms were located about 8 miles
southwest of Sierra Vista, moving north at 10 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Sierra Vista, Huachuca City, Fort Huachuca, Coronado National
Memorial, Canelo, Nicksville, Parker Canyon Lake, Ramsey Canyon
Preserve and Elgin.

LAT...LON 3159 11062 3167 11023 3133 11023 3133 11046
TIME...MOT...LOC 1858Z 172DEG 11KT 3145 11037

French

Special weather statement, Aug 23, 1:09 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Tucson AZ
109 PM MST WED AUG 23 2017

AZZ503-504-507-513-232100-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-Tucson Metro Area including Tucson/Green
Valley/Marana/Vail-
109 PM MST WED AUG 23 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN SANTA CRUZ COUNTY UNTIL
200 PM MST...

At 108 PM MST, Doppler radar was tracking strong thunderstorms along
a line extending from 15 miles southeast of East Sahuarita to 14
miles east of Nogales. Movement was northwest at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Patagonia, Kino Springs, Canelo, Sonoita, Elgin, Patagonia Lake and
Lochiel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is also occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3189 11088 3177 11045 3133 11046 3133 11087
TIME...MOT...LOC 2008Z 122DEG 14KT 3181 11070 3142 11069

French

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 9:58 AM MST	Blowing Dust Advisory	TWC	Pima, Pinal	9 hr
Aug 23, 11:58 AM MST	Special Weather Statement	TWC	Santa Cruz	47 min
Aug 23, 12:38 PM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	112 min
Aug 23, 2:41 PM MST	Special Weather Statement	TWC	Santa Cruz	34 min
Aug 23, 3:21 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 23, 3:21 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Aug 23, 3:33 PM MST	Flash Flood Warning	TWC	Pima, Santa Cruz	117 min
Aug 23, 3:33 PM MST	Special Weather Statement	TWC	Cochise	57 min
Aug 23, 3:45 PM MST	Areal Flood Advisory	TWC	Santa Cruz	90 min
Aug 23, 3:51 PM MST	Severe Thunderstorm Warning	TWC	Pinal	39 min
Aug 23, 4:02 PM MST	Severe Thunderstorm Warning	TWC	Pima	43 min
Aug 23, 4:11 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Aug 23, 4:12 PM MST	Areal Flood Advisory	TWC	Pinal	2 hr
Aug 23, 4:28 PM MST	Dust Storm Warning	TWC	Pima, Pinal	3 hr
Aug 23, 4:29 PM MST	Severe Thunderstorm Warning	TWC	Pinal	46 min
Aug 23, 4:34 PM MST	Flash Flood Warning	TWC	Pinal	116 min

Nearby

Special Weather Statements in Arizona, 2017 Every special weather statement in 2017

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.