Alert archive / Arizona / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 35, NWS Phoenix, AZ

August 26, 2013Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 26, 2013, 6:21 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 26, 2013, 6:21 PM MST (01:21 UTC)
Expired: Aug 26, 2013, 6:45 PM MST
In force: 24 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon

Counties Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 29 km from the middle of the area, began a volume at 01:22 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, 1.4 hours before the alert went out and 34 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: 183 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 2211 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 26, 6:20 PM MST, 1 minute earlier.

Area forecast discussion, Aug 26, 6:20 PM MST, 1 minute before

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Hazardous weather outlook, Aug 26, 4:52 AM MST, 13 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
452 AM MST MON AUG 26 2013

AZZ020-021-025-026-CAZ030>033-271200-
LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS-
YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
452 AM MST MON AUG 26 2013 /452 AM PDT MON AUG 26 2013/

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

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

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

SHOWERS WITH EMBEDDED ISOLATED THUNDERSTORMS ARE EXPECTED THROUGH THIS
EVENING. THE PRIMARY HAZARD IS VERY HEAVY RAIN LEADING TO LOCALIZED FLASH
FLOODING. A FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH 8 PM THIS
EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

MOISTURE WILL BE DECREASING SLIGHTLY TUESDAY AND WEDNESDAY...THOUGH A
SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WILL EXIST.
BETTER CHANCES FOR MORE EXPANSIVE THUNDERSTORM ACTIVITY WILL OCCUR ON
THURSDAY AND FRIDAY. THE PRIMARY WEATHER HAZARDS WILL BE GUSTY WINDS
IN EXCESS OF 40 MPH...DEADLY LIGHTNING...LOCALLY HEAVY RAIN LEADING
TO FLOODING OF WASHES AND LOW LYING AREAS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

AZZ022-023-027-028-271200-
NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHWEST MARICOPA COUNTY-NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
452 AM MST MON AUG 26 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH-CENTRAL ARIZONA.

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND EVENING. THE
PRIMARY HAZARDS ARE VERY HEAVY RAIN LEADING TO FLASH FLOODING...AND
DEADLY LIGHTNING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

MOISTURE WILL BE DECREASING SLIGHTLY TUESDAY AND WEDNESDAY...THOUGH A
SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WILL EXIST.
BETTER CHANCES FOR MORE EXPANSIVE THUNDERSTORM ACTIVITY WILL OCCUR ON
THURSDAY AND FRIDAY. THE PRIMARY WEATHER HAZARDS WILL BE GUSTY WINDS
IN EXCESS OF 40 MPH...DEADLY LIGHTNING...LOCALLY HEAVY RAIN LEADING
TO FLOODING OF WASHES AND LOW LYING AREAS. AREAS OF BLOWING DUST MAY
ALSO BE POSSIBLE WITH THUNDERSTORM OUTFLOWS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

AZZ024-271200-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
452 AM MST MON AUG 26 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST-CENTRAL ARIZONA.

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND EVENING. THE
PRIMARY WEATHER HAZARD IS LOCALLY HEAVY RAIN THAT COULD LEAD TO
LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

MOISTURE WILL BE DECREASING SLIGHTLY TUESDAY AND WEDNESDAY...THOUGH
REMAIN HIGH ENOUGH TO SUPPORT THE CHANCE FOR AFTERNOON AND EVENING
THUNDERSTORMS THROUGH THE END OF THE WEEK. THE PRIMARY WEATHER
HAZARDS WILL BE GUSTY WINDS IN EXCESS OF 40 MPH...DEADLY
LIGHTNING...LOCALLY HEAVY RAIN LEADING TO FLOODING OF WASHES AND LOW
LYING AREAS.

.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 26, 3:11 PM MST, 3 hours 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
311 PM MST MON AUG 26 2013

AZZ023-024-028-262300-
GILA AZ-PINAL AZ-MARICOPA AZ-
311 PM MST MON AUG 26 2013

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTH CENTRAL GILA COUNTY IN EAST CENTRAL ARIZONA
  EAST CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA
  NORTH CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA
  ESPECIALLY NEAR THE COMMUNITIES OF SAN TAN..FLORENCE...
  COOLIDGE...SACATON...AND OTHER AREAS NEAR CASA GRANDE.

UNTIL 400 PM MST

AT 259 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER STRONG THUNDERSTORM 3 MILES SOUTH OF FLORENCE...MOVING
NORTHWEST AT 20 MPH.  THESE ARE FAST MOVING STORMS CAPABLE OF
PRODUCING RAIN FILLED WIND GUSTS TO 50 MPH. EXTREMELY HEAVY RAIN IS
ALSO POSSIBLE WITH THE POTENTIAL FOR MINOR FLOODING.

IF THESE STORMS INTENSIFIES...A WARNING MAY BE NEEDED. STAY TUNED TO
NOAA WEATHER RADIO...LOCAL RADIO OR TV FOR THE LATEST UPDATES.

VERY HEAVY RAINFALL MAY CAUSE TEMPORARY PONDING ON SOME ROADS AND
MINOR FLOODING OF POOR DRAINAGE AREAS. IN HEAVY RAINFALL...SLOW DOWN
TO REDUCE THE RISK OF HYDROPLANING...AND LEAVE A SAFE DISTANCE
BETWEEN YOURSELF AND OTHER VEHICLES.

LAT...LON 3317 11105 3287 11149 3281 11156 3304 11183
      3353 11129 3329 11090
TIME...MOT...LOC 2207Z 258DEG 28KT 3316 11106

HV

Special weather statement, Aug 26, 5:21 PM MST, 1 hour before

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Local storm report, Aug 26, 5:33 PM MST, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
533 PM MST MON AUG 26 2013

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

0529 PM     DUST STORM       8 SW MARICOPA           32.98N 112.14W
08/26/2013                   PINAL              AZ   TRAINED SPOTTER

            VISIBILITY LESS THEN ONE QUARTER MILE

&&

EVENT NUMBER PSR1300145

MB

Local storm report, Aug 26, 5:37 PM MST, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
537 PM MST MON AUG 26 2013

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

0534 PM     DUST STORM       1 WSW COOLIDGE          32.97N 111.55W
08/26/2013                   PINAL              AZ   TRAINED SPOTTER

            VISIBILITY LESS THAN ONE QUARTER MILE

&&

EVENT NUMBER PSR1300146

MB

Local storm report, Aug 26, 6:05 PM MST, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
605 PM MST MON AUG 26 2013

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

0603 PM     DUST STORM       4 SSE TUMBLEWEED PARK   33.22N 111.80W
08/26/2013                   MARICOPA           AZ   TRAINED SPOTTER

            VISIBILITY LESS THAN 100 FEET.

&&

EVENT NUMBER PSR1300147

MB

Local storm report, Aug 26, 6:19 PM MST, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
619 PM MST MON AUG 26 2013

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

0618 PM     DUST STORM       1 SE AHWATUKEE          33.31N 111.99W
08/26/2013                   MARICOPA           AZ   TRAINED SPOTTER

            VISIBILITY ONE QUARTER MILE

&&

EVENT NUMBER PSR1300148

MB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 5:01 PM MST	Blowing Dust Advisory	PSR		119 min
Aug 26, 5:10 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa	110 min
Aug 26, 5:12 PM MST	Dust Storm Warning	PSR		2 hr
Aug 26, 5:21 PM MST	Special Weather Statement	PSR	Pinal	39 min
Aug 26, 5:26 PM MST	Severe Thunderstorm Warning	PSR	Pinal	19 min
Aug 26, 5:47 PM MST	Severe Thunderstorm Warning	PSR	Pinal	58 min
Aug 26, 5:54 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	111 min
Aug 26, 6:10 PM MST	Flash Flood Warning	PSR	Pinal	2 hr
Aug 26, 6:35 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	25 min
Aug 26, 6:36 PM MST	Flash Flood Warning	PSR	Maricopa	114 min
Aug 26, 6:55 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	110 min
Aug 26, 7:08 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	37 min
Aug 26, 7:31 PM MST	Areal Flood Advisory	PSR	Maricopa	119 min
Aug 26, 8:26 PM MST	Areal Flood Advisory	PSR	Maricopa	109 min
Aug 26, 9:11 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	34 min
Aug 26, 9:16 PM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	119 min
Aug 26, 10:45 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Aug 27, 1:59 PM MST	Special Weather Statement	PSR		46 min
Aug 27, 2:14 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Aug 27, 2:17 PM MST	Special Weather Statement	PSR	Pinal	43 min
Aug 27, 2:50 PM MST	Special Weather Statement	PSR		40 min
Aug 27, 2:58 PM MST	Special Weather Statement	PSR	Pinal	47 min
Aug 27, 4:18 PM MST	Severe Thunderstorm Warning	PSR	Pinal	57 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2013 Every severe thunderstorm warning in 2013

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.