Alert archive / Arizona / Flash Flood Watches in 2012

Flash Flood Watch 3, NWS Flagstaff, AZ

August 22, 20125 counties in Arizona

NWS Flagstaff, AZ issued this flash flood watch at Aug 22, 2012, 3:02 AM MST for 5 counties in Arizona. It took effect at Aug 22, 2012, 5:00 AM MST. It was in force for 26 hr.

The area

The counties it named.

The facts

Issued
Aug 22, 2012, 3:02 AM MST (10:02 UTC)
In effect from
Aug 22, 2012, 5:00 AM MST
Expired
Aug 23, 2012, 6:45 AM MST
In force
26 hr
Issued by
NWS Flagstaff, AZ
Flood severity
None

Counties Apache County, AZ, Coconino County, AZ, Gila County, AZ, Navajo County, AZ, Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 52 km from the middle of the area, began a volume at 10:04 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.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 10.0 hours before the alert went out and 78 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 00:00Z on 2012-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 93 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2012-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
93 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1376 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

146 
WGUS65 KFGZ 221002
FFAFGZ

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
302 AM MST WED AUG 22 2012


AZZ004>009-012-015-016-037-038-040-221900-
/O.NEW.KFGZ.FF.A.0003.120822T1200Z-120823T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-
YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
INCLUDING THE CITIES OF...JACOB LAKE...FREDONIA...PAGE...
LEES FERRY...GRAND CANYON VILLAGE...SUPAI...NORTH RIM...VALLE...
PRESCOTT...SELIGMAN...ASH FORK...KEAMS CANYON...KAIBITO...
WUPATKI N.M....TUBA CITY...FLAGSTAFF...WILLIAMS...MUNDS PARK...
HEBER...HAPPY JACK...FOREST LAKES...COTTONWOOD...CAMP VERDE...
CORDES JUNCTION...BAGDAD...SEDONA...DILKON...KYKOTSMOVI
302 AM MST WED AUG 22 2012

...FLASH FLOOD WATCH IN EFFECT FROM 500 AM MST THIS MORNING TO 1100
PM MST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WATCH FOR COCONINO AND YAVAPAI COUNTIES. 

* FROM 500 AM MST THIS MORNING TO 11 PM MST THIS EVENING

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA TODAY AND THURSDAY. AN UPPER LEVEL STORM SYSTEM WILL
  MOVE ACROSS THE REGION TODAY. THIS SYSTEM WILL INCREASE THE RISK
  OF WIDE SPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING. 

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER LOW
  SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING
  ACROSS LOW WATER CROSSINGS ...FLASH FLOODING ALONG HIKING
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY RAIN.
  AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$
5 follow-up statements
663 
WGUS65 KFGZ 221834
FFAFGZ

FLOOD WATCH
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1134 AM MST WED AUG 22 2012

AZZ004>009-012-015-016-037-038-040-230245-
/O.CON.KFGZ.FF.A.0003.000000T0000Z-120823T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-
YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
INCLUDING THE CITIES OF...JACOB LAKE...FREDONIA...PAGE...
LEES FERRY...GRAND CANYON VILLAGE...SUPAI...NORTH RIM...VALLE...
PRESCOTT...SELIGMAN...ASH FORK...KEAMS CANYON...KAIBITO...
WUPATKI N.M....TUBA CITY...FLAGSTAFF...WILLIAMS...MUNDS PARK...
HEBER...HAPPY JACK...FOREST LAKES...COTTONWOOD...CAMP VERDE...
CORDES JUNCTION...BAGDAD...SEDONA...DILKON...KYKOTSMOVI
1134 AM MST WED AUG 22 2012

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* COCONINO AND YAVAPAI COUNTIES.

* UNTIL 11 PM MST THIS EVENING.

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA TODAY AND THURSDAY. AN UPPER LEVEL STORM SYSTEM WILL
  MOVE ACROSS THE REGION TODAY AND TONIGHT. THIS SYSTEM WILL INCREASE
  THE RISK OF WIDE SPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING.

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER LOW
  SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY RAIN.
  AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$
028 
WGUS65 KFGZ 222123
FFAFGZ

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
223 PM MST WED AUG 22 2012

AZZ010-011-013-014-017-039-230530-
/O.EXB.KFGZ.FF.A.0003.000000T0000Z-120824T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-WHITE MOUNTAINS-
BLACK MESA AREA-
INCLUDING THE CITIES OF...CANYON DE CHELLY...CHINLE...KAYENTA...
WINDOW ROCK...GANADO...WINSLOW...HOLBROOK...SNOWFLAKE...
ST. JOHNS...SPRINGERVILLE...SHOW LOW...GREER...PINETOP...
NAVAJO N.M.
223 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE NORTHEAST ARIZONA...INCLUDING BLACK
  MESA AREA...CHINLE VALLEY...CHUSKA MOUNTAINS AND DEFIANCE
  PLATEAU...LITTLE COLORADO RIVER VALLEY AND WHITE MOUNTAINS.

* THROUGH THURSDAY AFTERNOON

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA TONIGHT AND THURSDAY BRINGING
  WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING.

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER LOW
  SPOTS ON HIGHWAYS AND UNIMPROVED ROADS...FLASH FLOODING ACROSS
  LOW WATER CROSSINGS...AND FLASH FLOODING ALONG HIKING TRAILS.
  REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF HEAVY RAIN
  AND UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY RAIN. AVOID
  CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$

AZZ018-230530-
/O.EXB.KFGZ.FF.A.0003.000000T0000Z-120823T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHERN GILA COUNTY-
INCLUDING THE CITIES OF...PAYSON...STRAWBERRY...YOUNG
223 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE NORTHERN GILA COUNTY

* THROUGH THURSDAY MORNING

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA TONIGHT AND THURSDAY BRINGING
  WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING.

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$

AZZ009-016-040-230530-
/O.EXT.KFGZ.FF.A.0003.000000T0000Z-120824T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-
EASTERN MOGOLLON RIM-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
INCLUDING THE CITIES OF...KEAMS CANYON...KAIBITO...HEBER...
HAPPY JACK...FOREST LAKES...DILKON...KYKOTSMOVI
223 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THURSDAY AFTERNOON...

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* PORTIONS OF NORTH CENTRAL ARIZONA AND NORTHEAST ARIZONA...
  INCLUDING THE EASTERN MOGOLLON RIM...NORTHEAST PLATEAUS AND
  MESAS HWY 264 NORTHWARD AND NORTHEAST PLATEAUS AND MESAS SOUTH
  OF HWY 264.

* THROUGH THURSDAY AFTERNOON

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA TONIGHT AND THURSDAY BRINGING
  WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING. 

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$

AZZ004>008-012-015-037-038-230530-
/O.EXT.KFGZ.FF.A.0003.000000T0000Z-120823T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
WESTERN MOGOLLON RIM-YAVAPAI COUNTY VALLEYS AND BASINS-
OAK CREEK AND SYCAMORE CANYONS-
INCLUDING THE CITIES OF...JACOB LAKE...FREDONIA...PAGE...
LEES FERRY...GRAND CANYON VILLAGE...SUPAI...NORTH RIM...VALLE...
PRESCOTT...SELIGMAN...ASH FORK...WUPATKI N.M....TUBA CITY...
FLAGSTAFF...WILLIAMS...MUNDS PARK...COTTONWOOD...CAMP VERDE...
CORDES JUNCTION...BAGDAD...SEDONA
223 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THURSDAY MORNING...

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* COCONINO AND YAVAPAI COUNTIES

* THROUGH THURSDAY MORNING

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA TONIGHT AND THURSDAY BRINGING
  WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING. 

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$
218 
WGUS65 KFGZ 230008
FFAFGZ

FLOOD WATCH
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
508 PM MST WED AUG 22 2012

AZZ009>011-013-014-016-017-039-040-230815-
/O.CON.KFGZ.FF.A.0003.000000T0000Z-120824T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY-
CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
EASTERN MOGOLLON RIM-WHITE MOUNTAINS-BLACK MESA AREA-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
INCLUDING THE CITIES OF...KEAMS CANYON...KAIBITO...
CANYON DE CHELLY...CHINLE...KAYENTA...WINDOW ROCK...GANADO...
WINSLOW...HOLBROOK...SNOWFLAKE...ST. JOHNS...SPRINGERVILLE...
HEBER...HAPPY JACK...FOREST LAKES...SHOW LOW...GREER...PINETOP...
NAVAJO N.M....DILKON...KYKOTSMOVI
508 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY
AFTERNOON...

THE FLASH FLOOD WATCH CONTINUES FOR

* NAVAJO AND APACHE COUNTIES

* THROUGH THURSDAY AFTERNOON

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN 
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM 
  WILL MOVE ACROSS THE AREA TONIGHT AND THURSDAY BRINGING 
  WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE 
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY 
  RAINFALL AND THE THREAT OF FLASH FLOODING. 

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$

AZZ004>008-012-015-018-037-038-230815-
/O.CON.KFGZ.FF.A.0003.000000T0000Z-120823T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
WESTERN MOGOLLON RIM-NORTHERN GILA COUNTY-
YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS-
INCLUDING THE CITIES OF...JACOB LAKE...FREDONIA...PAGE...
LEES FERRY...GRAND CANYON VILLAGE...SUPAI...NORTH RIM...VALLE...
PRESCOTT...SELIGMAN...ASH FORK...WUPATKI N.M....TUBA CITY...
FLAGSTAFF...WILLIAMS...MUNDS PARK...PAYSON...STRAWBERRY...YOUNG...
COTTONWOOD...CAMP VERDE...CORDES JUNCTION...BAGDAD...SEDONA
508 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING...

THE FLASH FLOOD WATCH CONTINUES FOR

* COCONINO...YAVAPAI...AND NORTHERN GILA COUNTIES 

* THROUGH THURSDAY MORNING

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA TONIGHT BRINGING WIDESPREAD SHOWERS
  AND THUNDERSTORMS. SOME OF THESE THUNDERSTORMS HAVE THE
  POTENTIAL TO PRODUCE VERY HEAVY RAINFALL AND THE THREAT OF FLASH
  FLOODING.

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$
358 
WGUS65 KFGZ 230523
FFAFGZ

FLOOD WATCH
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1023 PM MST WED AUG 22 2012

AZZ009>011-013-014-016-017-039-040-231500-
/O.CON.KFGZ.FF.A.0003.000000T0000Z-120824T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY-
CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
EASTERN MOGOLLON RIM-WHITE MOUNTAINS-BLACK MESA AREA-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
INCLUDING THE CITIES OF...KEAMS CANYON...KAIBITO...
CANYON DE CHELLY...CHINLE...KAYENTA...WINDOW ROCK...GANADO...
WINSLOW...HOLBROOK...SNOWFLAKE...ST. JOHNS...SPRINGERVILLE...
HEBER...HAPPY JACK...FOREST LAKES...SHOW LOW...GREER...PINETOP...
NAVAJO N.M....DILKON...KYKOTSMOVI
1023 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY
AFTERNOON...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTH CENTRAL ARIZONA AND NORTHEAST ARIZONA... 
  INCLUDING THE FOLLOWING AREAS...IN NORTH CENTRAL ARIZONA... 
  EASTERN MOGOLLON RIM. IN NORTHEAST ARIZONA...BLACK MESA AREA...
   CHINLE VALLEY...CHUSKA MOUNTAINS AND DEFIANCE PLATEAU...
  LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY...LITTLE 
  COLORADO RIVER VALLEY IN NAVAJO COUNTY...NORTHEAST PLATEAUS 
  AND MESAS HWY 264 NORTHWARD...NORTHEAST PLATEAUS AND MESAS 
  SOUTH OF HWY 264 AND WHITE MOUNTAINS. 

* THROUGH THURSDAY AFTERNOON

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA THROUGH THURSDAY BRINGING WIDESPREAD
  SHOWERS AND THUNDERSTORMS. SOME OF THESE THUNDERSTORMS HAVE THE
  POTENTIAL TO PRODUCE VERY HEAVY RAINFALL AND THE THREAT OF FLASH
  FLOODING.

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$

AZZ004>008-012-015-018-037-038-231500-
/O.CON.KFGZ.FF.A.0003.000000T0000Z-120823T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
WESTERN MOGOLLON RIM-NORTHERN GILA COUNTY-
YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS-
INCLUDING THE CITIES OF...JACOB LAKE...FREDONIA...PAGE...
LEES FERRY...GRAND CANYON VILLAGE...SUPAI...NORTH RIM...VALLE...
PRESCOTT...SELIGMAN...ASH FORK...WUPATKI N.M....TUBA CITY...
FLAGSTAFF...WILLIAMS...MUNDS PARK...PAYSON...STRAWBERRY...YOUNG...
COTTONWOOD...CAMP VERDE...CORDES JUNCTION...BAGDAD...SEDONA
1023 PM MST WED AUG 22 2012

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM MST THURSDAY...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA AND 
  WEST CENTRAL ARIZONA...INCLUDING THE FOLLOWING AREAS...IN EAST 
  CENTRAL ARIZONA...NORTHERN GILA COUNTY. IN NORTH CENTRAL 
  ARIZONA...COCONINO PLATEAU...GRAND CANYON COUNTRY...KAIBAB 
  PLATEAU...LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY AND 
  MARBLE AND GLEN CANYONS. IN WEST CENTRAL ARIZONA...OAK CREEK 
  AND SYCAMORE CANYONS...WESTERN MOGOLLON RIM...YAVAPAI COUNTY 
  MOUNTAINS AND YAVAPAI COUNTY VALLEYS AND BASINS. 

* UNTIL 8 AM MST THURSDAY

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTHERN
  ARIZONA THROUGH THURSDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM
  WILL MOVE ACROSS THE AREA TROUGH THURSDAY MORNING BRINGING
  WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME OF THESE
  THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL
  AND THE THREAT OF FLASH FLOODING.

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER 
  LOW SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING 
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING 
  TRAILS. REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF 
  HEAVY RAIN UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY 
  RAIN. AVOID CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$
376 
WGUS65 KFGZ 231345
FFAFGZ

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
645 AM MST THU AUG 23 2012


AZZ009>011-013-014-016-017-039-040-232145-
/O.CAN.KFGZ.FF.A.0003.000000T0000Z-120824T0000Z/
/O.NEW.KFGZ.FF.A.0004.120823T1500Z-120824T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY-
CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
EASTERN MOGOLLON RIM-WHITE MOUNTAINS-BLACK MESA AREA-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
INCLUDING THE CITIES OF...KEAMS CANYON...KAIBITO...
CANYON DE CHELLY...CHINLE...KAYENTA...WINDOW ROCK...GANADO...
WINSLOW...HOLBROOK...SNOWFLAKE...ST. JOHNS...SPRINGERVILLE...
HEBER...HAPPY JACK...FOREST LAKES...SHOW LOW...GREER...PINETOP...
NAVAJO N.M....DILKON...KYKOTSMOVI
645 AM MST THU AUG 23 2012

...FLASH FLOOD WATCH IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL ARIZONA AND 
  NORTHEAST ARIZONA...INCLUDING THE FOLLOWING AREAS...IN NORTH 
  CENTRAL ARIZONA...EASTERN MOGOLLON RIM. IN NORTHEAST ARIZONA...
   BLACK MESA AREA...CHINLE VALLEY...CHUSKA MOUNTAINS AND 
  DEFIANCE PLATEAU...LITTLE COLORADO RIVER VALLEY IN APACHE 
  COUNTY...LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY... 
  NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD...NORTHEAST 
  PLATEAUS AND MESAS SOUTH OF HWY 264 AND WHITE MOUNTAINS. 

* UNTIL 5 PM MST THIS AFTERNOON

* A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS NORTH EASTERN
  ARIZONA THROUGH THIS AFTERNOON. AN UPPER LEVEL LOW PRESSURE
  SYSTEM WILL MOVE ACROSS THE AREA BRINGING WIDESPREAD SHOWERS AND
  THUNDERSTORMS. SOME OF THESE THUNDERSTORMS HAVE THE POTENTIAL TO
  PRODUCE VERY HEAVY RAINFALL AND THE THREAT OF FLASH FLOODING. 

* PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR WATER TO COVER LOW
  SPOTS ON HIGHWAYS AND UNIMPROVED ROADWAYS...FLASH FLOODING
  ACROSS LOW WATER CROSSINGS...FLASH FLOODING ALONG HIKING TRAILS.
  REMEMBER FLASH FLOODS CAN OCCUR WITHIN THE AREAS OF HEAVY RAIN
  UP TO 50 MILES DOWN STREAM AWAY FROM THE HEAVY RAIN. AVOID
  CAMPING AND HIKING IN FLASH FLOOD PRONE AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT DEVELOPING CONDITIONS MAY LEAD TO
FLASH FLOODING WITHIN THE WATCH AREA. PEOPLE...ESPECIALLY THOSE
LOCATED ALONG AREA CREEKS...RIVERS OR OTHER FLASH FLOOD PRONE
AREAS...SHOULD CONTINUE TO MONITOR LATER FORECASTS AND BE
PREPARED TO TAKE IMMEDIATE ACTION SHOULD FLASH FLOOD WARNINGS BE
ISSUED.

&&

$$

AZZ004>008-012-015-018-037-038-231445-
/O.CAN.KFGZ.FF.A.0003.000000T0000Z-120823T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
WESTERN MOGOLLON RIM-NORTHERN GILA COUNTY-
YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS-
INCLUDING THE CITIES OF...JACOB LAKE...FREDONIA...PAGE...
LEES FERRY...GRAND CANYON VILLAGE...SUPAI...NORTH RIM...VALLE...
PRESCOTT...SELIGMAN...ASH FORK...WUPATKI N.M....TUBA CITY...
FLAGSTAFF...WILLIAMS...MUNDS PARK...PAYSON...STRAWBERRY...YOUNG...
COTTONWOOD...CAMP VERDE...CORDES JUNCTION...BAGDAD...SEDONA
645 AM MST THU AUG 23 2012

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF EAST CENTRAL ARIZONA...
NORTH CENTRAL ARIZONA AND WEST CENTRAL ARIZONA HAS BEEN
CANCELLED. 

THE UPPER LEVEL TROUGH HAS MOVED EAST OF THIS AREA AND DRIER AIR
HAS MOVED IN ALOFT. SHOWERS AND THUNDERSTORMS ARE FORECAST TO
REDEVELOP LATER THIS AFTERNOON...HOWEVER THE FLASH FLOODING THREAT
HAS DIMINISHED. 

$$

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Aug 21, 8:30 PM MST, 6 hours 32 minutes earlier.

Area forecast discussion, Aug 21, 8:30 PM MST, 6 hours 32 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
830 PM MST TUE AUG 21 2012

.SYNOPSIS...A LOW PRESSURE SYSTEM WILL MOVE ACROSS NORTHERN ARIZONA
WEDNESDAY THROUGH FRIDAY...BRINGING A PERIOD OF INCREASED
THUNDERSTORM ACTIVITY. THUNDERSTORM CHANCES WILL DECREASE BY THE
WEEKEND AS DRIER AIR MOVES IN FROM THE WEST.

&&

.DISCUSSION...VERY HEAVY THUNDERSTORMS EARLIER THIS AFTERNOON HAVE
DIMINISHED INTO LARGE AREAS OF LIGHT RAIN ACROSS NRN AZ THIS EVENING.
EXPECT LIGHT RAIN TO CONTINUE OVER MUCH OF NRN AZ FOR SEVERAL MORE
HOURS TONIGHT BEFORE DIMINISHING IN THE EARLY MORNING HOURS.

&&

.PREV DISCUSSION (400 PM)...HIGH PRESSURE ALOFT REMAINS CENTERED OVER
SOUTHEAST AZ. AS THE RIDGE SHIFTS EASTWARD AND A TROUGH MOVES IN FROM
THE WEST WEDNESDAY AND THURSDAY...INCREASED SHEAR INTERACTING WITH A
PLUME OF HIGH PWAT OVER NRN AZ WILL PROVIDE FOR STRONGER AND MORE
ORGANIZED THUNDERSTORMS. HEAVY RAIN AND HAIL ARE LIKELY WITH SOME OF
THESE STORMS. LARGE SCALE LIFT ASSOCIATED WITH THE TROUGH WILL BRING
THE POTENTIAL FOR STRONGER THAN TYPICAL NIGHTTIME THUNDERSTORM
ACTIVITY WEDNESDAY NIGHT AND THURSDAY NIGHT. HAVE INCLUDED HEAVY RAIN
INTENSITY IN THUNDERSTORMS IN GRIDS FOR DAYTIME AND EVENING PERIODS
THROUGH THURSDAY.

SLIGHTLY DRIER WEST TO NORTHWEST FLOW WILL DEVELOP BEHIND THE TROUGH
LATE FRIDAY TO BRING THUNDERSTORM CHANCES DOWN TO 30 TO 40 PERCENT...
DECREASING TO 20 TO 40 PERCENT OVER THE WEEKEND. DUE TO THE DRIER
CONDITIONS DAYTIME TEMPERATURES WILL RUN ABOVE NORMAL AND NIGHT
TEMPERATURES WILL BE COOLER THAN EXPECTED FOR THIS TIME OF YEAR.
MOISTURE WILL LIKELY INCREASE AGAIN EARLY NEXT WEEK AS THE RIDGE
BUILDS BACK INTO THE SOUTHWEST.

&&

.AVIATION...FOR THE 06Z PACKAGE...AREAS OF LIGHT RAIN WILL CONTINUE
THROUGH THE EARLY MORNING HOURS WITH OCNL AREAS MVFR. AFT 18Z...
SCT-NMRS SHRA/TSRA WILL REDEVELOP WITH MVFR/IFR LIKELY IN THE
STRONGER STORMS. WIND GUSTS OF 40KTS AND HAIL ARE ALSO PSBL.
AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS.

&&

.FGZ WATCHES/WARNINGS/ADVISORIES...NONE.

&&

PUBLIC.........DB/DJO
AVIATION.......DB

FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
Hazardous weather outlook, Aug 21, 4:24 AM MST, 22 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
424 AM MST TUE AUG 21 2012

AZZ004>018-037>040-220715-
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-
424 AM MST TUE AUG 21 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

DEEP MOISTURE COVERS NEARLY ALL OF NORTHERN ARIZONA TODAY. SCATTERED
TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO INITIALLY DEVELOP OVER
THE HIGHER TERRAIN...AND MOVE INTO THE LOWER ELEVATIONS LATER THIS
AFTERNOON AND TONIGHT. THE BEST MOISTURE AND INSTABILITY AND THE
GREATEST THREAT FOR LOCALLY HEAVY RAIN EXTENDS FROM THE COCONINO
PLATEAU AND MOGOLLON RIM SOUTHWARD.

THE PRIMARY THREATS ARE FREQUENT LIGHTNING...HEAVY RAIN...SMALL
HAIL AND STRONG GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A MOIST AND UNSTABLE AIR MASS WILL REMAIN ACROSS ARIZONA FOR THE
NEXT SEVERAL DAYS. EXPECT SHOWERS AND THUNDERSTORMS TO DEVELOP EACH
DAY. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO BECOME MORE
WIDESPREAD WEDNESDAY AND THURSDAY WITH AN INCREASED THREAT OF
LOCALLY HEAVY RAIN.

.SPOTTER INFORMATION STATEMENT...

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

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 5:04 PM MSTAreal Flood AdvisoryFGZApache, Navajo3 hr
Aug 22, 1:17 AM MSTFlash Flood WarningFGZCoconino9 hr
Aug 22, 9:53 AM MSTAreal Flood AdvisoryFGZCoconino12 hr
Aug 22, 1:16 PM MSTAreal Flood AdvisoryFGZApache104 min
Aug 22, 3:20 PM MSTAreal Flood AdvisoryFGZYavapai85 min
Aug 22, 4:17 PM MSTFlash Flood WarningFGZYavapai118 min

Nearby

Flash Flood Watches in Arizona, 2012Every flash flood watch in 2012

Sources

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