Alert archive / Arizona / Special Weather Statements in 2012
Special Weather Statement, NWS Phoenix, AZ
NWS Phoenix, AZ issued this special weather statement at Sep 8, 2012, 2:47 PM MST. It was in force for 58 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
- Sep 8, 2012, 2:47 PM MST (21:47 UTC)
- Expired
- Sep 8, 2012, 3:45 PM MST
- In force
- 58 min
- Issued by
- NWS Phoenix, AZ
The radar
The Phoenix radar (KIWA), 78 km from the middle of the area, began a volume at 21:47 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 (KTUS), launched 12:00Z, 9.8 hours before the alert went out and 138 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.
- Mixed-layer CAPE
- 1618 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 990 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 Sep 8, 2:15 PM MST, 32 minutes earlier.
Area forecast discussion, Sep 8, 2:15 PM MST, 32 minutes before
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</html>Hazardous weather outlook, Sep 8, 5:40 AM MST, 9 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 540 AM MST SAT SEP 8 2012 AZZ020>028-CAZ030>033-091400- 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- 540 AM MST SAT SEP 8 2012 /540 AM PDT SAT SEP 8 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR 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. ACTIVE WEATHER IS ONCE AGAIN EXPECTED ACROSS THE REGION TODAY AS LOW PRESSURE AFFECTS THE DESERT SOUTHWEST. STORMS ARE EXPECTED TO DEVELOP LATE THIS MORNING AND PERSIST INTO THE EVENING HOURS. THE PRIMARY HAZARDS WILL BE HEAVY RAIN AND FLOODING...ALONG WITH LIGHTNING AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE WILL BE A CONTINUED CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH TUESDAY...WITH DECREASING CHANCES FROM MID WEEK ONWARD. AT THIS POINT MONDAY LOOKS TO BE THE MOST ACTIVE DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX
In the hours before
Special weather statement, Sep 8, 2:47 PM MST, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
247 PM MST SAT SEP 8 2012
AZZ027-028-082245-
PINAL AZ-MARICOPA AZ-
247 PM MST SAT SEP 8 2012
...SIGNIFICANT WEATHER ADVISORY...
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
SOUTH CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA
WEST CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA
INCLUDING THE TABLE TOP WILDERNESS AREA AND VEKOL VALLEY
ROAD SOUTH OF INTERSTATE 8
UNTIL 345 PM MST
AT 237 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS WITH HEAVY HEAVY RAIN OVER THE TABLE TOP
WILDERNESS AREA AND NEARBY VEKOL VALLEY ROAD...OR 25 MILES WEST OF
CASA GRANDE.
THE TABLE TOP WILDERNESS AREA IS A POPULAR HIKING AREA. DIRT ROADS
TO THE CAMPGROUND MAY BECOME IMPASSABLE DUE TO MUD OR WASH FLOODING.
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 3268 11238 3285 11234 3284 11200 3272 11203
3271 11205
TIME...MOT...LOC 2143Z 090DEG 8KT 3277 11220
HVNearby
Special Weather Statements in Arizona, 2012Every special weather statement in 2012
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.