A weak trough over the west coast focused moisture into eastern portions of southsern Arizona and the majority of monsoon storms developed over Cochise County. The strongest storms were along the international border where large hail occurred.
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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.
A weak trough over the west coast focused moisture into eastern portions of southsern Arizona and the majority of monsoon storms developed over Cochise County. The strongest storms were along the international border where large hail occurred.
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 9, 2:34 PM MST, 2 hours 34 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 234 PM MST SAT AUG 9 2014 .SYNOPSIS...EXPECT INCREASING CHANCES OF THUNDERSTORMS AS DEEPER MOISTURE RETURNS TO THE AREA. EXPECT SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS DURING THE UPCOMING WEEK. NEAR AVERAGE DAYTIME TEMPERATURES WILL OCCUR INTO NEXT WEEK. && .DISCUSSION...RADAR WAS SHOWING A FEW STORMS DEVELOPING THIS AFTERNOON ACROSS MAINLY COCHISE AND GRAHAM COUNTIES. SONORA MEXICO WAS LOOKING VERY ACTIVE THUNDERSTORM WISE SO FAR TODAY. THIS ACTIVITY IN SONORA SHOULD EVOLVE INTO A LARGE THUNDERSTORM COMPLEX LATER TONIGHT WITH OUTFLOW SPREADING NORTHWARD FROM THIS AREA AND HELPING TRIGGER ADDITIONAL THUNDERSTORMS ACROSS MUCH OF SOUTHEAST ARIZONA. OTHERWISE...THE ANTICIPATED INCREASE IN MOISTURE THIS WEEKEND WAS PRETTY MUCH ONGOING TODAY WITH A MORE FAVORABLE SCENARIO FOR THUNDERSTORMS PLAYING OUT TOMORROW INTO NEXT WEEK. MEDIUM RANGE MODELS EVENTUALLY SHIFT THE DEEPER MOISTURE EASTWARD LATE NEXT WEEK AS A TROUGH OF LOW PRESSURE MOVES INLAND AND TRACKS INTO THE ROCKIES. THAT SAID...WILL SHOW A TREND OF DECREASING RAIN CHANCES AROUND FRIDAY OF NEXT WEEK. DAYTIME TEMPERATURES WILL REMAIN NEAR NORMAL FOR THIS TIME OF YEAR. && .AVIATION...VALID THRU 11/00Z. ISOLATED TO SCATTERED -TSRA/-SHRA THIS AFTERNOON AND EVENING...WITH CIGS 8-12K FT AGL. WIND GUSTS FROM THUNDERSTORM OUTFLOWS MAY APPROACH 35-45 KTS. OTHERWISE...SURFACE WINDS DIURNAL AND LESS THAN 15 KTS. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...MOISTURE IS ON THE INCREASE ACROSS SOUTHEAST ARIZONA...BRINGING ISOLATED TO SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS TODAY AND SUNDAY...THEN SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS CONTINUING INTO NEXT WEEK. STRONG...GUSTY AND ERRATIC WINDS WILL OCCUR WITH THE STRONGER THUNDERSTORMS. OTHERWISE...20-FOOT WINDS WILL MAINLY BE LESS THAN 15 MPH. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. && VISIT US ON FACEBOOK...TWITTER...YOUTUBE...AND AT WEATHER.GOV/TUCSON
The Tucson radar (KEMX), 109 km away, was scanning. The volume nearest the first event began at 00:06 UTC.
1 hail. Local standard time, as filed.
Spotter originally found quarter size hail, but later called back when he found pieces that were the size of half dollars.
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: 539367.