A thunderstorm produced strong outflow winds four miles north of Prescott.
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The episode as NWS FGZ wrote it up.
A thunderstorm produced strong outflow winds four miles north of Prescott.
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 Jul 13, 8:30 AM MST, 2 hours 7 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 830 AM MST FRI JUL 13 2012 .SYNOPSIS...A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN ARIZONA THROUGH THE WEEKEND BRINGING GOOD CHANCES FOR SHOWERS AND THUNDERSTORMS EACH DAY. && .DISCUSSION... SHORT TERM FORECAST IN GOOD SHAPE WITH NO UPDATES PLANNED. && PREV DISCUSSION 400 AM...DEEP SUBTROPICAL MOISTURE CONTINUES TO MOVE NORTHWARD INTO THE REGION TODAY...WITH THE HIGHEST PRECIPITABLE WATER JUST TO THE WEST AND SOUTHWEST WITH VALUES RUNNING FROM 1.5 TO 2 INCHES. INSTEAD OF A DOUBLE FEATURE THE ATMOSPHERE IS PROVIDING A TRIPLE FEATURE TODAY AND THIS WEEKEND. THE FIRST FEATURE IS THE SUBTROPICAL SYSTEM TO OUR WEST SOUTHWEST WHICH IS MOVING NORTHWEST...AND AS A RESULT BRINGING DEEP MOISTURE AND WEAK LIFT NORTHWARD INTO THE SOUTHWEST U.S. THE OTHER ATMOSPHERIC FEATURE WILL BE A PERSISTENT WEST COAST TROUGH WHICH IN TIME THE MODELS PHASE THE SUBTROPICAL SYSTEM WITH THE LARGE SCALE TROUGH AND THEN LIFTS BOTH NORTHEAST ACROSS UTAH AND NORTHERN ARIZONA SATURDAY INTO SUNDAY. NORTHWEST ARIZONA REMAINS UNDER WEAK SYNOPTIC SCALE LIFT BOTH OF THOSE DAYS. THE FINAL FEATURE IS A GOOD PLACEMENT OF THE SUBTROPICAL HIGH TO OUR EAST. BETWEEN THESE 3 FEATURES A FAIRLY GOOD JET FOR THIS TIME OF THE YEAR FORMS ACROSS WESTERN ARIZONA FROM SATURDAY THROUGH SUNDAY...PROVIDING A MODEST AMOUNT OF SHEAR WHICH COULD HELP ORGANIZE STORMS...IN TURN MAKING THEM STRONGER AND MORE EFFICIENT IN PRODUCING HEAVY RAIN AND POSSIBLY SOME HAIL. THE INSTABILITY FROM SATURDAY INTO SUNDAY LOOKS GOOD AS WELL. THIS PATTERN OVERALL COULD ALSO ALLOW STORMS TO TRAIN OVER AN AREA CAUSING LOCALLY HEAVY RAINFALL AMOUNTS. WE INTRODUCED LOCALLY HEAVY RAIN INTO THE GRIDS FOR TODAY AND SATURDAY...WITH THE MAIN CONCERN FOR SATURDAY FROM FLAGSTAFF NORTHWEST...INCLUDING COCONINO AND YAVAPAI COUNTIES. FOR NEXT WEEK...THE TROUGH LIFTS WEST AND NORTH OF THE REGION ALLOWING THE SUBTROPICAL HIGH TO HAVE MORE INFLUENCE OVER ARIZONA AND THE ATMOSPHERE DRIES A LITTLE WHICH MAY REDUCE THE MONSOONAL PATTERN TO MORE OF A LOW TO MODERATE GRADE WITH STORMS BECOMING ISOLATED TO SCATTERED. && .AVIATION...FOR THE 18Z PACKAGE...THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE HIGHER TERRAIN AND MOVE TOWARD THE N-NW THRU THE DAY...BECOMING NUMEROUS OVER AREAS WEST OF A LINE FROM PAGE TO GREER. THE STRONGER STORMS TODAY WILL BE CAPABLE OF MVFR/BRIEF IFR CONDITIONS WITH HEAVY RAIN...SMALL HAIL AND LOCAL WIND GUSTS IN EXCESS OF 35KT. STORMS SHOULD DIMINISH IN INTENSITY AND COVERAGE AFTER 03Z/SAT. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FIRE WEATHER... A MOIST SOUTHERLY FLOW WILL CONTINUE THROUGH SATURDAY WITH HIGH PRESSURE LOCATED OVER THE ROCKIES AND A WEAK LOW APPROACHING WESTERN ARIZONA. SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED EACH AFTERNOON AND EVENING...WITH THE HIGHEST COVERAGE OVER YAVAPAI AND COCONINO COUNTIES. THE STORMS WILL BE CAPABLE OF LOCALLY HEAVY RAINFALL...WITH WETTING RAINS LIKELY OVER MUCH OF THE AREA. DAYTIME TEMPERATURES WILL RUN A FEW DEGREES BELOW NORMAL. SUNDAY THROUGH TUESDAY...SOUTHWESTERLY FLOW ALOFT WILL DEVELOP OVER NORTHERN ARIZONA. ABUNDANT MOISTURE WILL LINGER THROUGH MONDAY BRINGING DAILY CHANCES FOR SHOWERS AND THUNDERSTORMS TO NORTHERN ARIZONA. BY TUESDAY...DRIER AIR IS FORECAST TO AFFECT CENTRAL AND WESTERN ARIZONA WITH THE BEST CHANCE OF STORMS SHIFTING TO EASTERN ARIZONA. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC.........DL / TC AVIATION.......KD FIRE WEATHER...JJ FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 450 AM MST FRI JUL 13 2012 AZZ004>018-037>040-140715- KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY- COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS- NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-WHITE MOUNTAINS- NORTHERN GILA COUNTY-YAVAPAI COUNTY VALLEYS AND BASINS- OAK CREEK AND SYCAMORE CANYONS-BLACK MESA AREA- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264- 450 AM MST FRI JUL 13 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT AND TONIGHT A MOIST AND UNSTABLE AIR MASS WILL BRING A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS TO PORTIONS OF NORTHWEST ARIZONA THIS AFTERNOON AND EVENING...WITH SCATTERED SHOWERS AND THUNDERSTORMS EAST OF FLAGSTAFF. THE MAIN STORM THREATS ARE LOCALLY HEAVY RAIN FALL... ESPECIALLY OVER NORTHWEST COCONINO COUNTY...LIGHTNING...AND GUSTY THUNDERSTORM WINDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY AN UPPER LEVEL WEATHER SYSTEM IS FORECAST TO INTERACT WITH THIS MOIST AND UNSTABLE AIR MASS PRODUCING THE POSSIBILITY OF LOCALLY HEAVY RAINFALL AND HAIL BOTH SATURDAY AND SUNDAY MAINLY FOR PORTIONS OF COCONINO AND YAVAPAI COUNTIES. BY MONDAY INTO THURSDAY...MOISTURE WILL DECREASE A LITTLE ACROSS NORTHERN ARIZONA BRINGING ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS TO THE REGION EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
A thunderstorm produced a wind gust of 69 MPH four miles north of Prescott.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2012Every state in 2012This day in weather historyWarnings in Arizona, July 2012
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: 401632.