Low pressure system undercut large scale high pressure ridge residing over the western US. Precipitable water values around one inch and the upper level dynamics associated with the low contributed to severe thunderstorms and areas of blowing dust occurred across parts of southeastern Arizona.
Every event with a place to put it. Tap one for its entry below.
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.
Low pressure system undercut large scale high pressure ridge residing over the western US. Precipitable water values around one inch and the upper level dynamics associated with the low contributed to severe thunderstorms and areas of blowing dust occurred across parts of southeastern Arizona.
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 Oct 19, 2:17 PM MST, 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 217 PM MST SUN OCT 19 2014 .SYNOPSIS...A SLOW MOVING WEATHER SYSTEM OVER NORTHERN MEXICO WILL KEEP THE CHANCE OF RAIN IN THE FORECAST THROUGH WEDNESDAY. STRONG HIGH PRESSURE WILL BRING DRIER CONDITIONS THE SECOND HALF OF THE WEEK ALONG WITH MUCH WARMER TEMPERATURES. && .DISCUSSION...RADAR CONTINUED TO SHOW ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING ACROSS THE AREA. THIS DEVELOPMENT WAS RATHER SIMILAR TO WHAT A FEW OF THE HIGH RESOLUTION MODELS WERE ADVERTISING FOR TODAY. MODELS ALSO SUGGESTED THAT OUTFLOW FROM THESE SHOWERS AND THUNDERSTORMS COULD BECOME ORGANIZED ENOUGH TO PRODUCE AREAS OF BLOWING DUST ACROSS MAINLY PINAL COUNTY BY EARLY THIS EVENING. THAT SAID...WILL KEEP SOME AREAS OF BLOWING DUST IN THE GRIDDED FORECAST FOR SOUTHEAST PINAL COUNTY. OTHERWISE...THE WEATHER SYSTEM RESPONSIBLE FOR BRINGING THE RAIN TODAY WAS PROGGED BY THE MODELS TO TRACK OVER NORTHERN MEXICO THROUGH LATE TUESDAY. THE VICINITY OF THE SYSTEM WILL KEEP RAIN CHANCES IN THE FORECAST AS IN TRACKS EAST. THE BEST CHANCE FOR RAIN WILL SHIFT EAST TOMORROW AND BE CONFINED MAINLY TO LOCATIONS EAST OF TUCSON AND NOGALES. THEREAFTER...HIGH PRESSURE ALOFT WAS PROGGED TO BUILD OVER THE REGION RESULTING IN DRIER CONDITIONS AND A WARMING TREND STATEWIDE AROUND THURSDAY INTO NEXT WEEKEND. && .AVIATION...VALID THRU 21/00Z. SCT-BKN CLOUDS 6-10K FT WITH THE HIGHEST COVERAGE EAST OF KTUS THIS AFTERNOON...THEN DIMINISHING CLOUD COVERAGE AFTER 20/03Z. THERE WILL BE ENOUGH MOISTURE FOR SCT -SHRA/-TSRA MAINLY FROM KTUS EASTWARD THIS AFTERNOON WITH COVERAGE DIMINISHING AFTER SUNSET. SFC WINDS GENERALLY LESS THAN 10 KTS EXCEPT SOUTHEAST WIND TO 15 KT EASTERN AREAS. GUSTY WINDS ARE POSSIBLE IN/NEAR TSRA THIS AFTERNOON AND EARLY EVENING. SOME ISOLD -SHRA/-TSRA WILL BE POSSIBLE AGAIN MONDAY AFTER 18Z BUT MAINLY ACROSS EASTERN AREAS INCLUDING KDUG. SOME AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...A TROUGH OF LOW PRESSURE ACROSS THE AREA IN COMBINATION WITH MODEST MOISTURE WILL RESULT IN A CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH TUESDAY...MAINLY FROM TUCSON EASTWARD. BY WEDNESDAY...REMAINING MOISTURE ALONG WITH A SLIGHT CHANCE OF SHOWERS WILL BE LIMITED TO JUST THE WHITE MOUNTAINS. DRY CONDITIONS WILL THEN OCCUR AREA WIDE FOR THE END OF THE WORK WEEK WITH SIGNIFICANTLY ABOVE NORMAL HIGH TEMPERATURES. 20-FOOT WINDS WILL GENERALLY BE DIURNAL AND LESS THAN 15 MPH THIS WEEK. SOME GUSTY WINDS ARE POSSIBLE NEAR ANY THUNDERSTORMS. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. VISIT US ON FACEBOOK...TWITTER...YOUTUBE...AND AT WEATHER.GOV/TUCSON
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 114 PM MST SUN OCT 19 2014 AZZ509-510-192100- UPPER GILA RIVER AND ARAVAIPA VALLEYS INCLUDING CLIFTON/SAFFORD AZ-WHITE MOUNTAINS OF GRAHAM AND GREENLEE COUNTIES INCLUDING HANNAGAN MEADOW AZ- 114 PM MST SUN OCT 19 2014 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GREENLEE COUNTY UNTIL 200 PM MST... AT 107 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING AN AREA OF STRONG THUNDERSTORMS CENTERED ABOUT 5 MILES EAST OF GUTHRIE AND CLIFTON...MOVING NORTH AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. AREAS AFFECTED BY THIS STORM INCLUDE...CLIFTON AND MORENCI. LAT...LON 3284 10906 3287 10930 3337 10947 3345 10906 TIME...MOT...LOC 2013Z 161DEG 24KT 3302 10917 GL
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 212 PM MST SUN OCT 19 2014 AZZ507-511-192145- GALIURO AND PINALENO MOUNTAINS INCLUDING MOUNT GRAHAM AZ-UPPER SAN PEDRO RIVER VALLEY INCLUDING SIERRA VISTA/BENSON AZ- 212 PM MST SUN OCT 19 2014 ...SIGNIFICANT WEATHER ADVISORY FOR EXTREME NORTHEASTERN PIMA AND NORTHWESTERN COCHISE COUNTIES UNTIL 245 PM MST... AT 204 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 16 MILES NORTH OF BENSON...OR 28 MILES WEST OF WILLCOX...MOVING NORTHWEST AT 20 MPH TOWARDS CASCABEL. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. AREAS AFFECTED BY THIS STORM INCLUDE...CASCABEL. LAT...LON 3243 11046 3242 11025 3212 11014 3210 11042 TIME...MOT...LOC 2112Z 150DEG 20KT 3223 11034 GL
The Tucson radar (KEMX), 48 km away, was scanning. The volume nearest the first event began at 21:31 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Tucson Electric & Power reported that thunderstorm winds downed several power poles and lines in an area bounded by River Road, Swan Road, Fort Lowell Road and Alvernon Way. About 1100 customers lost power.
Spotter report of hail with some pieces as big as quarters along interstate 19 near Tubac.
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, October 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 2026-10-01. Each event’s entry at NCEI: 544558, 544553.