Monsoon storms fired once again, mainly concentrated in Pima County, in conjunction with a weak shortwave trough moving through southern Arizona. Storms produced torrential rain which resulted in road closures on the Tohono O'Odham Nation.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS TWC wrote it up.
Monsoon storms fired once again, mainly concentrated in Pima County, in conjunction with a weak shortwave trough moving through southern Arizona. Storms produced torrential rain which resulted in road closures on the Tohono O'Odham Nation.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before the first event at Aug 8, 2:50 PM MST, 2 hours 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 250 PM MST FRI AUG 8 2014 .SYNOPSIS...EXPECT INCREASING CHANCES OF THUNDERSTORMS THIS WEEKEND AS DEEPER MOISTURE RETURNS TO THE AREA. THEREAFTER...SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS WILL PREVAIL DURING THE UPCOMING WEEK. NEAR AVERAGE DAYTIME TEMPERATURES WILL OCCUR INTO NEXT WEEK. && .DISCUSSION...ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS EXTENDED FROM WRN PIMA COUNTY SEWD INTO SANTA CRUZ COUNTY AT THIS TIME. OTHER ISOLATED SHOWERS/TSTMS WERE ADJACENT SOME OF THE MOUNTAIN RANGES OF GREENLEE/GRAHAM/COCHISE COUNTIES. ISOLATED TO SCATTERED SHOWERS/TSTMS WILL OCCUR THIS EVENING AS A SOMEWHAT MOIST AND UNSTABLE ENVIRONMENT CONTINUES ACROSS THE AREA. VERY SLOW STORM MOVEMENT MAY YIELD BRIEF HEAVY RAIN...AND BRIEF WIND GUSTS PERHAPS TO 40 KTS MAY ALSO OCCUR. THE BULK OF SHOWERS/TSTMS WILL DECREASE AROUND OR SHORTLY AFTER SUNSET. HAVE OPTED FOR DRY CONDITIONS AREA- WIDE LATE TONIGHT. A GRADUAL INCREASE OF MOISTURE CONTINUES TO BE PROGGED SAT-MON VIA THE 08/12Z NAM/GFS/ECWMF/CANADIAN SOLUTIONS. THUS...HAVE ONLY MADE VERY MINOR MODIFICATIONS TO THE GRIDDED DATA POP FIELDS BASED ON THESE SOLUTIONS. THE POPS GENERALLY YIELD SCATTERED COVERAGE OF AFTERNOON/EVENING SHOWERS/TSTMS MAINLY EAST AND SOUTH OF TUCSON. ISOLATED SHOWERS/TSTMS ARE FORECAST TO OCCUR ACROSS WRN/CENTRAL PIMA COUNTY AND SOUTH CENTRAL PINAL COUNTY. THEREAFTER...08/12Z GFS/ECMWF WERE SIMILAR WITH DEPICTING CONSIDERABLY DEEPER MOISTURE TO BE ACROSS SE AZ TUE AS A WEAK UPPER LOW/INVERTED TROUGH MOVES SLOWLY NWD ACROSS THE AREA. TAKEN AT FACE VALUE...MARKEDLY HIGHER PRECIP CHANCES SHOULD OCCUR TUE. HOWEVER... FORECAST CONFIDENCE IS SOMEWHAT LOW REGARDING THIS SCENARIO FOR A COUPLE OF REASONS. THESE MEDIUM RANGE MODELS EARLIER THIS WEEK WERE DEPICTING A STRONG UPSWING IN SHOWER/TSTM ACTIVITY THIS WEEKEND. THIS PARTICULAR SCENARIO NOW APPEARS TO BE DELAYED UNTIL TUE. ANOTHER REASON FOR SOMEWHAT LOW FORECAST CONFIDENCE IS THAT THE TIMING MAY BE OFF BY PLUS/MINUS 12 HOURS. THIS MAY TRANSLATE INTO THE NIGHTTIME PERIOD HAVING INCREASED SHOWER/TSTM COVERAGE VERSUS THE DAYTIME HOURS...OR VICE VERSA. AT ANY RATE...HAVE OPTED TO REDUCE INHERITED POPS SOMEWHAT FOR MON- TUE. STILL APPEARS THAT CHANCE-CATEGORY POPS WILL SUFFICE FOR MOST SECTIONS DURING THE AFTERNOON/EVENING HOURS. MARKEDLY LESS COVERAGE OF SHOWERS/TSTMS MAY OCCUR WED ASSUMING SUBSIDENCE OCCURS BEHIND THE DEPARTING UPPER LEVEL SYSTEM. SCATTERED MAINLY AFTERNOON/EVENING SHOWERS/TSTMS ARE THEN EXPECTED THUR-FRI. DAYTIME TEMPS DURING THIS FORECAST PERIOD WILL GENERALLY AVERAGE WITHIN A FEW DEGS OF NORMAL...ABOVE OR BELOW NORMAL...DEPENDING UPON LOCATION. && .AVIATION...VALID THRU 09/23Z. INCREASING MOISTURE WILL RESULT IN INCREASING CHANCES OF SHOWERS AND THUNDERSTORMS THIS WEEKEND. EXPECT ISOLATED TO SCATTERED -TSRA/-SHRA THIS EVENING MAINLY FROM KTUS VICINITY WWD/SWD...WITH ISOLATED TO SCATTERED -TSRA/-SHRA AREAWIDE SATURDAY. CLOUD DECKS WILL GENERALLY BE AT 6-10K FT AGL. WIND GUSTS FROM OUTFLOWS MAY APPROACH 35-40 KTS. OTHERWISE...SURFACE WIND LESS THAN 15 KTS. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...MOISTURE WILL INCREASE ACROSS SOUTHEAST ARIZONA... WITH ISOLATED TO SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THIS WEEKEND...AND SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS NEXT WEEK. STRONG...GUSTY AND ERRATIC WINDS WILL OCCUR WITH THE STRONGER THUNDERSTORMS. OTHERWISE... 20-FOOT WINDS WILL MAINLY BE LESS THAN 15 MPH. WITH INCREASING CHANCES OF PRECIPITATION...RELATIVE HUMIDITY VALUES WILL ALSO BE ON THE INCREASE. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. && VISIT US ON FACEBOOK...TWITTER...YOUTUBE...AND AT WEATHER.GOV/TUCSON DISCUSSION...FRANCIS AVIATION/FIRE WEATHER...ZELL
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 254 PM MST FRI AUG 8 2014 AZZ503-513-082245- DRAGOON/MULE/HUACHUCA AND SANTA RITA MOUNTAINS INCLUDING BISBEE/CANELO HILLS/MADERA CANYON AZ-UPPER SANTA CRUZ RIVER AND ALTAR VALLEYS INCLUDING NOGALES AZ- 254 PM MST FRI AUG 8 2014 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SANTA CRUZ COUNTY UNTIL 345 PM MST... AT 243 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM IN THE VICINITY OF NOGALES. THIS STORM WAS MOVING TO THE NORTH AT 5 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 55 MPH ARE EXPECTED WITH THIS STORM. AREAS AFFECTED BY THIS STORM INCLUDE...TUBAC...RIO RICO AND TUMACACORI. LAT...LON 3164 11110 3167 11076 3134 11071 3134 11106 TIME...MOT...LOC 2153Z 138DEG 2KT 3149 11090 FRANCIS
The Phoenix radar (KIWA), 166 km away, was scanning. The volume nearest the first event began at 00:38 UTC.
1 flash flood. Local standard time, as filed.
Flooding occurred south of Gu Vo. Many roads including Indian Route 1 were impassable.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2014Every state in 2014This day in weather historyWarnings in Arizona, August 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 539365.