Alert archive / Arizona / Special Weather Statements in 2017

Special Weather Statement, NWS Tucson, AZ

August 4, 2017Graham County, Arizona

NWS Tucson, AZ issued this special weather statement at Aug 4, 2017, 1:35 PM MST for Graham County, Arizona. It was in force for 25 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 4, 2017, 1:35 PM MST (20:35 UTC)
Expired: Aug 4, 2017, 2:00 PM MST
In force: 25 min
Issued by: NWS Tucson, AZ

County Graham County, AZ

The radar

The Tucson radar (KEMX), 128 km from the middle of the area, began a volume at 20:37 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, 8.6 hours before the alert went out and 110 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: 524 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1571 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: -12 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 4, 10:00 AM MST, 3 hours 35 minutes earlier.

Area forecast discussion, Aug 4, 10:00 AM MST, 3 hours 35 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

Local storm report, Aug 4, 10:50 AM MST, 2 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
1050 AM MST FRI AUG 04 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     TSTM WND DMG     3 WNW TUCSON            32.26N 110.98W
08/03/2017                   PIMA               AZ   BROADCAST MEDIA

            DELAYED REPORT...TWO TREES DOWN JUST WEST OF GLENN AND
            ORACLE. TIME ESTIMATED FROM RADAR.

&&

EVENT NUMBER TWC1700058

KD

Special weather statement, Aug 4, 12:58 PM MST, 37 minutes before

Special Weather Statement
National Weather Service Tucson AZ
1258 PM MST FRI AUG 4 2017

AZZ509-511-042030-
Upper Gila River and Aravaipa Valleys including
Clifton/Safford-Galiuro and Pinaleno Mountains including Mount
Graham-
1258 PM MST FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN GRAHAM COUNTY UNTIL
130 PM MST...

At 1257 PM MST, Doppler radar was tracking a strong thunderstorm 25
miles west of Safford, moving east at 10 mph. Another strong storm
was near Klondyke.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Klondyke.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3281 11043 3310 11012 3294 10994 3270 11012
TIME...MOT...LOC 1957Z 284DEG 9KT 3291 11012

KD

Special weather statement, Aug 4, 1:35 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Tucson AZ
135 PM MST FRI AUG 4 2017

AZZ509-511-042100-
Upper Gila River and Aravaipa Valleys including
Clifton/Safford-Galiuro and Pinaleno Mountains including Mount
Graham-
135 PM MST FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL GRAHAM COUNTY UNTIL
200 PM MST...

At 135 PM MST, Doppler radar was tracking a strong thunderstorm 17
miles southeast of San Carlos Reservoir over the Santa Teresa
Mountains, moving north at 5 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

This storm will remain over mainly remote areas of west central
Graham County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3293 11035 3313 11037 3315 11015 3290 11012
TIME...MOT...LOC 2035Z 183DEG 7KT 3301 11024

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 5:13 PM MST	Special Weather Statement	TWC	Pima	47 min
Aug 3, 5:46 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	119 min
Aug 3, 5:55 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 3, 6:00 PM MST	Special Weather Statement	TWC		30 min
Aug 3, 6:19 PM MST	Flash Flood Warning	TWC	Pima, Pinal	3 hr
Aug 3, 6:21 PM MST	Special Weather Statement	TWC	Pinal	54 min
Aug 3, 7:29 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 4, 12:58 PM MST	Special Weather Statement	TWC	Graham	32 min
Aug 4, 1:47 PM MST	Special Weather Statement	TWC	Cochise	28 min
Aug 4, 1:58 PM MST	Special Weather Statement	TWC	Graham	32 min
Aug 4, 2:12 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Aug 4, 4:18 PM MST	Flash Flood Warning	TWC	Cochise	3 hr

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.