Alert archive / Arizona / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 116, NWS Phoenix, AZ

September 9, 2008La Paz County, Yuma County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 9, 2008, 9:01 PM MST for La Paz County, Yuma County, Arizona. It was in force for 53 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: Sep 9, 2008, 9:01 PM MST (04:01 UTC)
Expired: Sep 9, 2008, 9:54 PM MST
In force: 53 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon

Counties La Paz County, AZ, Yuma County, AZ

The radar

The Yuma radar (KYUX), 107 km from the middle of the area, began a volume at 04:05 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, 4.0 hours before the alert went out and 184 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: 369 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 2519 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 16 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 Sep 9, 8:55 PM MST, 6 minutes earlier.

Area forecast discussion, Sep 9, 8:55 PM MST, 6 minutes before

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Hazardous weather outlook, Sep 9, 5:54 AM MST, 15 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
554 AM MST TUE SEP 9 2008

AZZ020>028-CAZ030>033-100100-
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-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
554 AM MST TUE SEP 9 2008 /554 AM PDT TUE SEP 9 2008/

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

.DAY ONE...TODAY AND TONIGHT
AN INCREASE IN MOISTURE ALONG WITH THE PRESENCE OF AN UPPER TROUGH
WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS OVER THE HIGHER
TERRAIN OF SOUTH-CENTRAL ARIZONA AND SLIGHT CHANCE OF STORMS OVER THE
LOWER ELEVATIONS...MAINLY SOUTHWEST AND SOUTH-CENTRAL ARIZONA. STORMS
WILL BE ABLE TO FORM AT ANY TIME OF THE DAY. THE MAIN THREAT FROM THE
STORMS WILL BE LOCALLY VERY STRONG WINDS WHICH COULD PRODUCE AREAS OF
BLOWING DUST...MOST LIKELY TO OCCUR DURING THE AFTERNOON AND EVENING
HOURS. THE STRONGER STORMS WILL ALSO BE CAPABLE OF PRODUCING BRIEF
HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
THE STORM THREAT WILL CONTINUE IN A SIMILAR FASHION THROUGH THURSDAY
FOLLOWED BY DECREASED CHANCES FRIDAY BEFORE BEING CONFINED TO THE
HIGHER TERRAIN OF SOUTH-CENTRAL ARIZONA OVER THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT

WEATHER.GOV/PHOENIX

In the hours before

Local storm report, Sep 9, 5:04 PM MST, 3 hours 57 minutes before

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Local storm report, Sep 9, 5:39 PM MST, 3 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
539 PM MST TUE SEP 09 2008

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

0520 PM     HAIL             8 E PEORIA              33.70N 112.11W
09/09/2008  E0.75 INCH       MARICOPA           AZ   TRAINED SPOTTER

            AT GREENWAY AND I-17.

&&

SSIPPLE

Local storm report, Sep 9, 6:04 PM MST, 2 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
604 PM MST TUE SEP 09 2008

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

0518 PM     HAIL             4 E CASHION             33.44N 112.25W
09/09/2008  E1.75 INCH       MARICOPA           AZ   BROADCAST MEDIA

            AT 83RD AVE AND BUCKEYE ROAD.

&&

SSIPPLE

Local storm report, Sep 9, 6:04 PM MST, 2 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PHOENIX AZ
604 PM MST TUE SEP 09 2008

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

0508 PM     HAIL             4 E CASHION             33.44N 112.25W
09/09/2008  E1.75 INCH       MARICOPA           AZ   BROADCAST MEDIA

            AT 83RD AVE AND BUCKEYE ROAD.

&&

SSIPPLE

Local storm report, Sep 9, 8:19 PM MST, 42 minutes before

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Local storm report, Sep 9, 8:19 PM MST, 42 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
Sep 9, 5:13 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	47 min
Sep 9, 6:40 PM MST	Severe Thunderstorm Warning	PSR	La Paz	65 min
Sep 9, 7:56 PM MST	Severe Thunderstorm Warning	PSR	La Paz	34 min
Sep 9, 7:57 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	38 min
Sep 9, 8:25 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	50 min
Sep 10, 12:59 PM MST	Severe Thunderstorm Warning	PSR	Yuma	46 min
Sep 10, 2:01 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Sep 10, 3:05 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	55 min
Sep 10, 3:36 PM MST	Severe Thunderstorm Warning	PSR	La Paz	54 min
Sep 10, 3:52 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	38 min
Sep 10, 3:53 PM MST	Areal Flood Advisory	PSR	La Paz	112 min
Sep 10, 4:22 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	38 min
Sep 10, 4:31 PM MST	Severe Thunderstorm Warning	PSR	La Paz	46 min
Sep 9, 5:38 PM MST	Severe Thunderstorm Warning	PSR	Imperial	21 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2008 Every severe thunderstorm warning in 2008

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.