Alert archive / Arizona / Special Weather Statements in 2016

Special Weather Statement, NWS Phoenix, AZ

August 3, 2016Maricopa County, Arizona

NWS Phoenix, AZ issued this special weather statement at Aug 3, 2016, 9:50 PM MST for Maricopa County, Arizona. It was in force for 40 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, 2016, 9:50 PM MST (04:50 UTC)
Expired: Aug 3, 2016, 10:30 PM MST
In force: 40 min
Issued by: NWS Phoenix, AZ

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 131 km from the middle of the area, began a volume at 04:52 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

Phoenix, AZ (KPSR), launched 00:00Z, 4.8 hours before the alert went out and 101 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: 429 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1484 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 71 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 Phoenix, AZ wrote its last area forecast discussion before this special weather statement went out at Aug 3, 9:30 PM MST, 20 minutes earlier.

Area forecast discussion, Aug 3, 9:30 PM MST, 20 minutes before

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In the hours before

Special weather statement, Aug 3, 5:45 PM MST, 4 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
545 PM MST WED AUG 3 2016

AZZ027-028-040130-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY AZ-
SOUTHWEST MARICOPA COUNTY AZ-
545 PM MST WED AUG 3 2016

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  MARICOPA AND PINAL COUNTIES

UNTIL 630 PM MST

AT 545 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9
MILES SOUTHEAST OF FREEMAN...OR 25 MILES WEST OF CASA GRANDE. THIS
STORM WAS NEARLY STATIONARY.

WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH THIS STORM.

THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF MARICOPA AND PINAL
COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LOCALLY DENSE BLOWING DUST IS POSSIBLE.  IF YOU ENCOUNTER BLOWING
DUST WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND
PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE.

&&

LAT...LON 3273 11223 3285 11220 3291 11199 3277 11197
      3276 11199 3276 11205 3273 11205 3272 11207
      3272 11215
TIME...MOT...LOC 0045Z 260DEG 4KT 3278 11216

SAWTELLE

Special weather statement, Aug 3, 6:21 PM MST, 3 hours 29 minutes before

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Special weather statement, Aug 3, 6:35 PM MST, 3 hours 15 minutes before

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Special weather statement, Aug 3, 6:53 PM MST, 2 hours 57 minutes before

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Local storm report, Aug 3, 8:27 PM MST, 1 hour 23 minutes before

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Special weather statement, Aug 3, 9:50 PM MST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 5:23 PM MST	Areal Flood Advisory	PSR	Pinal	3 hr
Aug 3, 5:45 PM MST	Special Weather Statement	PSR		45 min
Aug 3, 6:21 PM MST	Special Weather Statement	PSR	La Paz	24 min
Aug 3, 6:35 PM MST	Special Weather Statement	PSR		25 min
Aug 3, 6:53 PM MST	Special Weather Statement	PSR	La Paz	37 min
Aug 3, 7:39 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Aug 4, 4:25 PM MST	Special Weather Statement	PSR		20 min
Aug 4, 4:45 PM MST	Special Weather Statement	PSR		15 min

Nearby

Special Weather Statements in Arizona, 2016 Every special weather statement in 2016

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.