Several colliding outflow boundaries, combined with anomalously high atmospheric moisture associated with Hurricane Linda off the Baja Coast, resulted in shower and thunderstorm development around Yuma during the afternoon hours of Tuesday September 8. Initial hazards included blowing dust and damaging winds (including several downed trees in the Loma Vista Estates), however flooding quickly became the primary threat as storms trained (moved over the same area) for several hours.
As is typically the case during the monsoon, rainfall amounts varied across the region, with little rainfall to the east of Yuma, and tremendous amounts south of the airport near Somerton.
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IR Satellite imagery showing the evolution of storms across the area. Loop from approximately 4-8pm Tue |
KYUX Base Reflectivity showing colliding outflow boundaries and quasi-stationary storms in/around Yuma. Loop from 4pm-8pm Tue. |
KYUX Base Velocity showing several colliding outflow boundaries along with a few downburst wind signatures near the radar. Loop from 4pm-8pm Tue. |
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Storm total rainfall from several regional mesonet sites, including KNYL airport (0.91") and the Cibola RAWS (2.14"). Not shown: Somerton (4.6") |
Storm total rainfall from Somerton, AZ. This gauge measured a total of 4.6", which closely matched KYUX radar estimates. Image courtesy Melissa Garibay |
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Flooded streets in Somerton. Image courtesy Berenice Carranza (via Facebook) |
Flooded streets in Somerton. Image courtesy Anna Covarrubias (via Facebook) |
Downed power poles in Yuma. Image courtesy APS (via Twitter) |
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Tree damage in the Loma Vista Estates. Image courtesy KYMA TV |
Flooded streets in Somerton. Image courtesy Ricky Prieto (via Facebook) |
Flooded streets in Somerton. Image courtesy Ricky Prieto (via Facebook) |
...RECORD DAILY MAXIMUM RAINFALL SET AT YUMA AZ... A RECORD RAINFALL OF 0.91 INCH(ES) WAS SET AT YUMA AZ YESTERDAY. THIS BREAKS THE OLD RECORD OF 0.19 SET IN 1896.
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 PM TSTM WND DMG 3 ENE ARABY 32.69N 114.47W
09/08/2015 YUMA AZ BROADCAST MEDIA
LARGE TREE UPROOTED AND FELL ON HOUSE
0435 PM TSTM WND DMG 7 SSE YUMA 32.58N 114.58W
09/08/2015 YUMA AZ AMATEUR RADIO
POWER POLES DOWN ON AVE 3E AND COUNTY 16 TO 19
0435 PM TSTM WND DMG 1 ESE YUMA 32.67N 114.60W
09/08/2015 YUMA AZ UTILITY COMPANY
DELAYED REPORT...43 POWER POLES DOWN BETWEEN AVENUES 1E
AND 3E.
0611 PM TSTM WND DMG 4 ESE SOMERTON 32.57N 114.66W
09/08/2015 YUMA AZ TRAINED SPOTTER
PALM TREES DOWN. FRUIT TREE UPROOTED. 4 TO 6 INCH
DIAMTER BRANCHES KNOCKED OFF OF TREES
0700 PM HEAVY RAIN 3 ENE SOMERTON 32.62N 114.66W
09/08/2015 M4.60 INCH YUMA AZ TRAINED SPOTTER
4.60 INCHES OF RAIN IN 2 HOURS
0800 PM FLASH FLOOD 1 SE SOMERTON 32.59N 114.70W
09/08/2015 YUMA AZ BROADCAST MEDIA
PEOPLE LEAVING FLOODED HOUSES SOUTH OF HIGHWAY 95
BETWEEN JOSHUA ST. AND BINGHAM AVE.
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
310 PM MST WED SEP 9 2015
...RAINFALL REPORTS PAST 24 HOURS ...
LOCATION AMOUNT TIME/DATE
...ARIZONA...
...LA PAZ COUNTY...
3 SSW CIBOLA 2.14 IN 0248 PM 09/09
2 NW WENDEN 0.04 IN 0239 PM 09/09
...MARICOPA COUNTY...
ADOBE DAM PCP-5535 OUTLET- 0.31 IN 1241 PM 09/09
2 E NORTH SCOTTSDALE 0.22 IN 0255 PM 09/09
HASSAYAMPA RIVER NR MORRISTO 0.17 IN 0230 PM 09/09
MORRISTOWN 0.15 IN 0247 PM 09/09
INDIAN BEND WASH @ MCKELLIPS 0.12 IN 0929 AM 09/09
1 NNE SUN LAKES 0.07 IN 0300 PM 09/09
8 ESE CAREFREE 0.05 IN 0259 PM 09/09
1 ENE ARIZONA STATE UNIVERSI 0.05 IN 0254 PM 09/09
DEAD HORSE WASH 0.04 IN 0904 AM 09/09
MORRISTOWN 0.04 IN 0218 PM 09/09
PRICE RD DRAIN- LOOP 101 & 2 0.04 IN 0123 PM 09/09
POWDER HOUSE WASH 0.03 IN 0101 PM 09/09
18 NE SENTINEL 0.02 IN 1000 AM 09/09
2 SW DEER VALLEY 0.01 IN 0225 PM 09/09
4 E AHWATUKEE FOOTHILLS 0.01 IN 0257 PM 09/09
...YUMA COUNTY...
FORT YUMA RAWS 1.41 IN 0216 PM 09/09
1 SSW WINTERHAVEN 0.82 IN 0300 PM 09/09
6 W FORTUNA FOOTHILLS 0.62 IN 0258 PM 09/09
COLORADO RIVER BL LAGUNA DAM 0.44 IN 0236 PM 09/09
1 NNW FORTUNA FOOTHILLS 0.40 IN 0300 PM 09/09
5 N DATELAND 0.05 IN 0230 PM 09/09
...CALIFORNIA...
...IMPERIAL COUNTY...
4 ENE GORDON'S WELL 0.09 IN 0209 PM 09/09
4 S MARTINEZ LAKE 0.04 IN 0227 PM 09/09
...RIVERSIDE COUNTY...
1 NNE DESERT CENTER 0.04 IN 0258 PM 09/09
OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING
EQUIPMENT AND EXPOSURE. NOT ALL DATA LISTED ARE CONSIDERED OFFICIAL.
$$
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