Alert archive / Arizona / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 75, NWS Flagstaff, AZ

August 12, 2015Coconino County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 12, 2015, 2:28 PM MST for Coconino County, Arizona. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 12, 2015, 2:28 PM MST (21:28 UTC)
Expired: Aug 12, 2015, 3:15 PM MST
In force: 47 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon

County Coconino County, AZ

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 21:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 12, 9:00 AM MST, 5 hours 28 minutes earlier.

Area forecast discussion, Aug 12, 9:00 AM MST, 5 hours 28 minutes before

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Hazardous weather outlook, Aug 12, 4:14 AM MST, 10 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
414 AM MST WED AUG 12 2015

AZZ004>018-037>040-130900-
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-
414 AM MST WED AUG 12 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...
NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN
ARIZONA.

.DAY ONE...TODAY AND TONIGHT
SIGNIFICANT MOISTURE WILL PERSIST ACROSS NORTHERN ARIZONA AGAIN
TODAY WITH ANOTHER ROUND OF NUMEROUS SHOWERS AND THUNDERSTORMS
ANTICIPATED...ESPECIALLY ALONG AND WEST OF A PRESCOTT TO FLAGSTAFF
TO PAGE LINE. STRONGER STORMS WILL BE CAPABLE OF PRODUCING
DAMAGING WINDS AND HAIL ALONG WITH LOCALIZED FLASH FLOODING. STORM
MOTION WILL BE SOUTH TO NORTH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THURSDAY THROUGH MONDAY...HIGH PRESSURE GRADUALLY SHIFTS WESTWARD
APPROACHING AND EVENTUALLY MOVING INTO ARIZONA. WHILE A REDUCTION
IN STORMS IS EXPECTED...ENOUGH MOISTURE AND INSTABILITY WILL
REMAIN TO KEEP SLIGHT CHANCES FOR PRECIPITATION EACH DAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

KD

In the hours before

Local storm report, Aug 12, 12:06 PM MST, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1206 PM MST WED AUG 12 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     FLASH FLOOD      20 SSE KAIBITO          36.32N 110.97W
08/11/2015                   COCONINO           AZ   PUBLIC

            WATER FLOODED ROAD NEAR JCT OF HWY 160 SR 98. TIME
            ESTIMATED.

&&

CORRECTED EVENT TIME...REMARKS

EVENT NUMBER FGZ1500121

NWS FLAGSTAFF

The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 11, 5:01 PM MST	Special Weather Statement	FGZ		29 min
Aug 11, 5:10 PM MST	Special Weather Statement	FGZ	Navajo	50 min
Aug 11, 6:33 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	27 min
Aug 11, 6:56 PM MST	Special Weather Statement	FGZ		49 min
Aug 11, 7:11 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	49 min
Aug 11, 8:10 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	50 min
Aug 11, 11:38 PM MST	Special Weather Statement	FGZ	Yavapai	22 min
Aug 12, 12:18 AM MST	Special Weather Statement	FGZ	Yavapai	42 min
Aug 12, 12:19 PM MST	Areal Flood Advisory	FGZ	Coconino	12 hr
Aug 12, 3:30 PM MST	Special Weather Statement	FGZ		45 min
Aug 12, 4:39 PM MST	Areal Flood Advisory	FGZ	Coconino	4 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.