Alert archive / Arizona / Special Weather Statements in 2015
Special Weather Statement, NWS Phoenix, AZ
NWS Phoenix, AZ issued this special weather statement at Aug 6, 2015, 3:43 PM MST. It was in force for 32 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 6, 2015, 3:43 PM MST (22:43 UTC)
- Expired
- Aug 6, 2015, 4:15 PM MST
- In force
- 32 min
- Issued by
- NWS Phoenix, AZ
The radar
The Yuma radar (KYUX), 112 km from the middle of the area, began a volume at 22:45 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
Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 10.7 hours before the alert went out and 119 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
- 612 J/kg
- Mixed-layer CIN
- -379 J/kg
- Mixed-layer LCL
- 2383 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- 0 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 Aug 6, 2:10 PM MST, 1 hour 33 minutes earlier.
Area forecast discussion, Aug 6, 2:10 PM MST, 1 hour 33 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 210 PM MST THU AUG 6 2015 .SYNOPSIS...INCREASED MONSOON MOISTURE WILL LEAD TO A THREAT OF SHOWERS AND THUNDESTORMS THROUGH EARLY TONIGHT. A MORE STABLE AND DRIER WESTERLY WIND PATTERN WILL SHIFT STORM CHANCES INTO NORTHERN AND EASTERN ARIZONA FRIDAY...THEN INTO EASTERN ARIZONA THIS WEEKEND. THE CHANCE FOR SHOWERS AND THUNDERSTORMS WILL SLOWLY RETURN STATEWIDE EARLY NEXT WEEK. && .DISCUSSION... REMAINDER OF TODAY AND TONIGHT... THE ATMOSPHERE OVER OUR FORECAST AREA IS A MESS AND WORTHY OF A BROAD BRUSH FORECAST OF A CHANCE OF SHOWERS AND THUNDERSTORMS THE REMAINDER OF THE AFTERNOON THROUGH EARLY TONIGHT. ACCELERATING UPPER LEVEL WINDS FROM A COL AREA OFF THE BAJA COAST...INCREASING LOW LEVEL MONSOON MOISTURE FROM MEXICO...AND LATE AFTERNOON WARM SIDE DIFFERENTIAL HEATING MAKE THE ATMOSPHERE SORT OF MESSY WITH POTENTIAL INSTABILITY AT EVERY TURN. HOWEVER...IF THUNDERSTORMS DO DEVELOP OVER PORTIONS OF SOUTHEAST CA AND SOUTHWEST AZ...THERE IS A POSSIBILITY OF STRONG DOWNBURST WINDS DUE TO HIGH AFTERNOON TEMPERATURES IN THESE LOCATIONS. SATURDAY AND SUNDAY...A DRIER AND MORE STABLE AIRMASS WILL SPREAD INTO OUR FORECAST AREA FROM THE WEST THIS WEEKEND...KEEPING THE CHANCE OF STORMS CONFINED TO EASTERN ARIZONA...EXCEPT FOR A SLIGHT CHANCE OVER THE HIGHER TERRAIN OF SOUTHERN GILA COUNTY/ZONE 24. MONDAY THROUGH WEDNESDAY...MODELS CONTINUE TO VARY ON THE TIMING AND INTENSITY OF INVERTED TROFS MOVING INTO SOUTHERN AZ FRM MEXICO THIS PERIOD. ONE THING IS FOR CERTAIN...THERE WILL BE PATTERN CHANGE THIS PERIOD WITH A CONTINUOUS SOUTHERLY FLOW OF MONSOON MOISTURE EVERY TODAY. THEREFORE SINCE AREAL STORM COVERAGE AND POTENTIAL STORM INTENSITIES WILL BE UNCERTAIN...THE BEST APPROACH IS TO CONTINUE A LOW THREAT OF SHOWERS AND THUNDERSTORMS DAY DAY THIS PERIOD. && .AVIATION... SOUTH-CENTRAL ARIZONA INCLUDING KPHX...KIWA...AND KSDL... FAIRLY COMPLEX FORECAST SCENARIO SETTING UP FOR THE AREA AS MONSOON MOISTURE SURGED BACK INTO THE REGION OVERNIGHT. MORNING DEBRIS CLOUD SHIELD AND STRAY VCSH WILL HOLD OVER THE PHX AREA TERMINALS THROUGH AT LEAST THE EARLY AFTERNOON. AM CLOUD COVER COULD PREVENT OR AT LEAST DELAY STORM DEVELOPMENT DUE TO HEATING FROM THE SUN OVER THE SOUTH-CENTRAL AZ THIS AFTN. MORE LIKELY SCENARIO FOR STORM DEVELOPMENT COULD BE FROM LONG TRAVELING AND INTERSECTING OUTFLOWS LATER INTO THE AFTN AND EVENING HOURS. DID INTRODUCE VCTS MENTION FOR THE PHX AREA TERMINALS POST 07/02Z. WITH THE MOISTURE RETURN AND FAVORABLE ENVIRONMENT FOR STORMS TODAY...COULD NOT RULE OUT SOME MENTION. MIDDAY SE TO VRB WINDS WILL GRADUALLY TRANSITION TO SW-W HEADINGS BY THE AFTERNOON. SOUTHEAST CALIFORNIA/SOUTHWEST ARIZONA INCLUDING KIPL AND KBLH... FAVORABLE MOISTURE RETURN AND STORM DYNAMIC SET-UP THIS AFTN AND EVENING...WITH AT LEAST PLENTY OF CB COVERAGE ACROSS SE CA BY THE AFTN. MAINTAINED VCTS IN FOR KBLH DURING THE AFTERNOON HOURS. LIGHT AM WINDS FOR KIPL TO GIVE WAY TO SOUTHWESTERLY BREEZES BY THE AFTN AND ELEVATED SOUTHERLY HEADINGS TO HOLD FOR KBLH. THE ONLY VARIANT IN WINDS WILL BE FROM STORM AND OUTFLOW WINDS ONCE STORMS BEGIN TO DEVELOP LATER INTO THE DAY. AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS. && .FIRE WEATHER... SATURDAY THROUGH WEDNESDAY... LIMITED MOISTURE WILL BE PRESENT ACROSS MOSTLY EASTERN PORTIONS OF ARIZONA THROUGH THE WEEKEND ALLOWING FOR AFTERNOON/EVENING SLIGHT CHANCES FOR SHOWERS AND THUNDERSTORMS MAINLY OVER HIGHER TERRAIN LOCATIONS NORTH AND EAST OF PHOENIX. INCREASING MOISTURE INTO EARLY NEXT WEEK WILL PUSH CHANCES OF SHOWERS AND THUNDERSTORMS INTO THE SOUTHERN AND WESTERN ARIZONA DESERTS. MINIMUM RELATIVE HUMIDITIES OF 10 TO 20 PERCENT RANGE WILL BE COMMON ACROSS THE DESERTS THIS WEEKEND WITH SOME IMPROVEMENT GOING INTO EARLY NEXT WEEK. DRIEST LOCATION WILL BE SOUTHEAST CALIFORNIA THIS WEEKEND WITH MINIMUM RH VALUES INTO THE SINGLE DIGITS. HIGH TEMPERATURES WILL BE AROUND OR SLIGHTLY ABOVE NORMAL THROUGH THE PERIOD. WINDS WILL BE LIGHT THROUGH MUCH OF THE PERIOD FOLLOWING TYPICAL DIURNAL DIRECTIONS EXCEPT FOR AFTERNOON UPSLOPE BREEZES GUSTING AT TIMES UP TO 20 MPH. && .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && .PSR WATCHES/WARNINGS/ADVISORIES... AZ...NONE. CA...NONE. && VISIT US ON FACEBOOK...TWITTER...AND AT WEATHER.GOV/PHOENIX DISCUSSION...VASQUEZ/MEYERS AVIATION...NOLTE FIRE WEATHER...KUHLMAN/CB
In the hours before
Local storm report, Aug 6, 1:51 PM MST, 1 hour 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
151 PM MST THU AUG 06 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0142 PM TSTM WND GST 1 S BOUSE 33.92N 114.00W
08/06/2015 M62 MPH LA PAZ AZ TRAINED SPOTTER
AND MEASURED 0.5 IN. OF RAIN FALLEN IN 30 MINUTES
&&
EVENT NUMBER PSR1500092
PSRLocal storm report, Aug 6, 2:02 PM MST, 1 hour 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
202 PM MST THU AUG 06 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0141 PM TSTM WND DMG 1 ESE QUARTZSITE 33.66N 114.20W
08/06/2015 LA PAZ AZ FIRE DEPT/RESCUE
3 SEMI TRUCKS BLOWN OVER ON I-10 BETWEEN MILPOSTS 20
AND 23
&&
EVENT NUMBER PSR1500093
PSRSpecial weather statement, Aug 6, 3:18 PM MST, 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 318 PM PDT THU AUG 6 2015 CAZ031>033-062245- IMPERIAL COUNTY CA-RIVERSIDE COUNTY/EASTERN DESERTS CA- LOWER COLORADO RIVER VALLEY CA CA- 318 PM PDT THU AUG 6 2015 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTHEASTERN RIVERSIDE AND NORTH CENTRAL IMPERIAL COUNTIES UNTIL 345 PM PDT AT 317 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 13 MILES WEST OF PALO VERDE...OR 31 MILES SOUTHEAST OF DESERT CENTER... MOVING NORTH AT 5 MPH. WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTHEASTERN RIVERSIDE AND NORTH CENTRAL IMPERIAL 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 3333 11487 3332 11509 3362 11513 3363 11480 TIME...MOT...LOC 2217Z 182DEG 6KT 3344 11496 18
Special weather statement, Aug 6, 3:24 PM MST, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 324 PM MST THU AUG 6 2015 AZZ026-062300- SOUTHWEST DESERTS AZ- 324 PM MST THU AUG 6 2015 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... CENTRAL YUMA COUNTY UNTIL 400 PM MST AT 324 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR TACNA...OR 25 MILES EAST OF FORTUNA FOOTHILLS...MOVING NORTH AT 20 MPH. WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... TACNA...TYSON AND ROLL. 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 3266 11390 3266 11407 3289 11415 3292 11382 TIME...MOT...LOC 2224Z 177DEG 19KT 3275 11399 18
Local storm report, Aug 6, 3:38 PM MST, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
338 PM MST THU AUG 06 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0213 PM TSTM WND GST 1 S BOUSE 33.91N 114.00W
08/06/2015 M74 MPH LA PAZ AZ TRAINED SPOTTER
&&
EVENT NUMBER PSR1500094
PSRSpecial weather statement, Aug 6, 3:43 PM MST, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 343 PM PDT THU AUG 6 2015 CAZ031>033-062315- IMPERIAL COUNTY CA-RIVERSIDE COUNTY/EASTERN DESERTS CA- LOWER COLORADO RIVER VALLEY CA CA- 343 PM PDT THU AUG 6 2015 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTHEASTERN RIVERSIDE AND NORTH CENTRAL IMPERIAL COUNTIES UNTIL 415 PM PDT AT 343 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 15 MILES WEST OF PALO VERDE...OR 29 MILES SOUTHEAST OF DESERT CENTER... MOVING NORTH AT 10 MPH. WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTHEASTERN RIVERSIDE AND NORTH CENTRAL IMPERIAL 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 3339 11486 3338 11510 3359 11514 3359 11480 TIME...MOT...LOC 2243Z 181DEG 10KT 3347 11499 18
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 12:52 PM MST | Special Weather Statement | PSR | La Paz | 53 min |
| Aug 6, 1:27 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 33 min |
| Aug 6, 1:30 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 30 min |
| Aug 6, 2:07 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 23 min |
| Aug 6, 2:32 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 28 min |
| Aug 6, 3:03 PM MST | Blowing Dust Advisory | PSR | 5 hr | |
| Aug 6, 3:10 PM MST | Areal Flood Warning | PSR | La Paz | 3 hr |
| Aug 6, 3:14 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 16 min |
| Aug 6, 3:18 PM MST | Special Weather Statement | PSR | 27 min | |
| Aug 6, 3:24 PM MST | Special Weather Statement | PSR | Yuma | 36 min |
| Aug 6, 2:47 PM MST | Severe Thunderstorm Warning | PSR | Riverside | 28 min |
| Aug 6, 3:57 PM MST | Areal Flood Advisory | PSR | Imperial, Riverside | 3 hr |
Nearby
Special Weather Statements in Arizona, 2015Every special weather statement in 2015
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.