A thunderstorm produced heavy rain and minor flooding in St Johns.
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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 FGZ wrote it up.
A thunderstorm produced heavy rain and minor flooding in St Johns.
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 Flagstaff, AZ wrote its last area forecast discussion before the first event at Aug 4, 9:00 AM MST, 4 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST MON AUG 4 2014 .SYNOPSIS...A SOUTHWESTERLY FLOW PATTERN ACROSS ARIZONA WILL BRING DRIER AND WARMER WEATHER...ESPECIALLY FROM TUESDAY INTO THURSDAY. FROM FRIDAY INTO THE WEEKEND...MODELS HINT THAT SOUTHERLY FLOW WILL BRING INCREASING MOISTURE AND A BETTER CHANCE OF THUNDERSTORMS. && .DISCUSSION...WE HAVE LOWERED CLOUD COVER FOR THE MORNING STRETCH ACROSS PORTIONS OF WESTERN ARIZONA. OTHERWISE...CURRENT FORECAST IN GOOD SHAPE. THE LOW PRESSURE SYSTEM RESPONSIBLE FOR WIDESPREAD RAIN OVER THE PAST FEW DAYS WILL CONTINUE TO MOVE NORTHWARD INTO NEVADA. MEANWHILE HIGH PRESSURE WILL REMAIN SOUTHEAST OF ARIZONA ALLOWING DRIER AND MORE STABLE AIR TO MOVE IN FROM THE PACIFIC. AS MOISTURE LEVELS FALL THE AIR MASS WILL STABILIZE WITH A DOWNWARD TREND IN THUNDERSTORM ACTIVITY...ESPECIALLY TUESDAY THROUGH THURSDAY. FROM FRIDAY INTO SUNDAY...MODELS ARE SHOWING A DEEP SOUTHERLY FETCH DEVELOPING OVER ARIZONA TAPPING INTO MOISTURE OVER MEXICO. THE CHALLENGE WITH THESE LONGER RANGE FORECASTS DURING THE MONSOON SEASON IS PREDICTING THE NORTHWARD EXTENT OF THIS DEEPER MOISTURE. THIS IS PRIMARILY DUE TO THE DIFFICULTY IN MODELING THE POSITION OF SUBTLE/WEAK LARGE-SCALE PATTERNS OF THE MONSOON BEYOND A FEW DAYS. IN ANY CASE...AT THIS POINT IT LOOKS LIKE AN UPSWING IN THUNDERSTORM ACTIVITY HEADED INTO THE WEEKEND. && .AVIATION...FOR THE 18Z PACKAGE...ISOLATED TO SCATTERED -SHRA/-TSRA WILL DEVELOP AGAIN TODAY CAUSING LOCAL MVFR CONDITIONS...ESPECIALLY OVER THE HIGHER TERRAIN EAST OF A KPAN-KINW-KOV7 LINE. CONVECTIVE ACTIVITY DIMINISHING AFTER 03Z TUESDAY. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC.........MCCOLLUM/BOHLIN AVIATION.......KD/JJ FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
A thunderstorm produced heavy rain with minor flooding in at least 6 homes.
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: 539423.