Alert archive / Arizona / Special Weather Statements in 2014

Special Weather Statement, NWS Phoenix, AZ

August 19, 2014Maricopa County, Arizona

NWS Phoenix, AZ issued this special weather statement at Aug 19, 2014, 8:16 PM MST for Maricopa County, Arizona. It was in force for 14 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 19, 2014, 8:16 PM MST (03:16 UTC)
Expired: Aug 19, 2014, 8:30 PM MST
In force: 14 min
Issued by: NWS Phoenix, AZ

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 37 km from the middle of the area, began a volume at 03:17 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, 3.3 hours before the alert went out and 10 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: 157 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1301 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 19, 8:15 PM MST, 1 minute earlier.

Area forecast discussion, Aug 19, 8:15 PM MST, 1 minute before

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Hazardous weather outlook, Aug 19, 3:47 AM MST, 16 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
347 AM MST TUE AUG 19 2014

AZZ020>028-CAZ031-201100-
LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS-
NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS-
SOUTHWEST MARICOPA COUNTY-NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
LOWER COLORADO RIVER VALLEY CA-
347 AM MST TUE AUG 19 2014 /347 AM PDT TUE AUG 19 2014/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST-CENTRAL
ARIZONA...EXTREME SOUTHWEST ARIZONA...EXTREME WEST-CENTRAL
ARIZONA...SOUTH-CENTRAL ARIZONA...SOUTHWEST ARIZONA...WEST-CENTRAL
ARIZONA AND EXTREME SOUTHEAST CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT.

THE COMBINATION OF A RATHER STRONG UPPER LEVEL LOW CENTER (FOR MID-
AUGUST) APPROACHING FROM THE NORTHWEST AND INCREASING MOISTURE FROM
THE SOUTH WILL ALLOW WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY TO
DEVELOP TODAY...WITH THE BEST CHANCES FOR RAINFALL TO BE FROM THE
MID-MORNING INTO THE EARLY AFTERNOON HOURS. HEAVY RAIN...LOCALIZED
FLOODING AND STRONG GUSTY WINDS ARE THE PRIMARY WEATHER HAZARDS
ASSOCIATED WITH ANY STORMS THAT DEVELOPS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THE COMBINATION OF A UPPER LEVEL LOW CENTER MOVING EASTWARD OVER THE
REGION AND LINGERING MONSOON MOISTURE WILL KEEP THE THREAT OF
ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS GOING THROUGH THE END
OF THE WORKWEEK...WITH THE HIGHER TERRAIN NORTH AND EAST OF PHOENIX
SEEING THE BEST CHANCE OF STORMS. DRIER AIR MOVING IN FROM THE WEST
WILL REDUCE THE CHANCES FOR STORMS OVER THE UPCOMING WEEKEND,,,AND
INTO EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT

WEATHER.GOV/PHOENIX

In the hours before

Special weather statement, Aug 19, 6:39 PM MST, 1 hour 37 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
639 PM MST TUE AUG 19 2014

AZZ023-028-200215-
PINAL AZ-MARICOPA AZ-
639 PM MST TUE AUG 19 2014

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA
  EXTREME NORTHWESTERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA

UNTIL 715 PM MST

AT 638 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SURPRISE STADIUM TO
LITCHFIELD PARK TO ESTRELLA MOUNTAIN RANCH...AND MOVING EAST AT 25
MPH.

WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
   SURPRISE STADIUM... ESTRELLA MOUNTAIN RANCH... LITCHFIELD PARK...
  LUKE AFB AND  WADDELL...
   SURPRISE... AVONDALE... CAMELBACK RANCH... EL MIRAGE... ESTRELLA
  MOUNTAIN PARK AND  YOUNGTOWN...
   SUN CITY... GLENDALE SPORTS COMPLEX AND  PHOENIX INTERNATIONAL
  RACEWAY...

LAT...LON 3365 11211 3347 11210 3325 11218 3331 11257
      3347 11255 3365 11253
TIME...MOT...LOC 0140Z 274DEG 23KT 3362 11240 3348 11239
          3333 11246

18

Local storm report, Aug 19, 6:47 PM MST, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
647 PM MST TUE AUG 19 2014

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

0638 PM     TSTM WND GST     5 W LUKE AFB            33.54N 112.45W
08/19/2014  M48 MPH          MARICOPA           AZ   TRAINED SPOTTER

            VSBY. 1 MI. TOWARDS THE WEST DUE TO A WALL OF RAIN
            APPROACHING FROM THE WEST.

&&

EVENT NUMBER PSR1400233

PSR

Special weather statement, Aug 19, 7:12 PM MST, 1 hour 4 minutes before

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Special weather statement, Aug 19, 8:07 PM MST, 9 minutes before

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Special weather statement, Aug 19, 8:16 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 19, 6:07 PM MST	Areal Flood Advisory	PSR	Maricopa	113 min
Aug 19, 6:39 PM MST	Special Weather Statement	PSR	Maricopa	36 min
Aug 19, 6:45 PM MST	Areal Flood Warning	PSR	Maricopa	4 hr
Aug 19, 6:51 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	24 min
Aug 19, 7:12 PM MST	Special Weather Statement	PSR	Maricopa	33 min
Aug 19, 7:22 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 19, 8:00 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Aug 19, 8:07 PM MST	Special Weather Statement	PSR	Maricopa	8 min
Aug 19, 8:26 PM MST	Special Weather Statement	PSR		34 min
Aug 20, 4:53 PM MST	Special Weather Statement	PSR	La Paz	37 min

Nearby

Special Weather Statements in Arizona, 2014 Every special weather statement in 2014

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.