Alert archive / Arizona / Flash Flood Warnings in 2008

Flash Flood Warning 21, NWS Flagstaff, AZ

August 17, 2008Coconino County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 17, 2008, 6:38 AM MST for Coconino County, Arizona. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 17, 2008, 6:38 AM MST (13:38 UTC)
Expired: Aug 17, 2008, 6:45 PM MST
In force: 12 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Coconino County, AZ

The radar

The Cedar City radar (KICX), 153 km from the middle of the area, began a volume at 13:39 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 12:00Z, 1.6 hours before the alert went out and 135 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 20 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1559 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KFGZ 171348
FFWFGZ
AZC005-171945-
/O.NEW.KFGZ.FF.W.0021.080817T1338Z-080817T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
638 AM MST SUN AUG 17 2008

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL COCONINO COUNTY IN NORTH CENTRAL ARIZONA...

* UNTIL 1245 PM MST

* AT 625 AM MST...THE COCONINO COUNTY SHERIFF REPORTED THAT THE REDLANDS DAM
  WEST OF VALLE HAD BREACHED. THIS WILL SEND ADDITIONAL FLOOD WATER DOWN 
  CATARACT CANYON...AND ADD TO THE FLASH FLOODING THAT IS ONGOING IN SUPAI 
  THIS MORNING. THE SUPAI POLICE DEPARTMENT REPORTS THAT EXTENSIVE 
  FLOODING IS OCCURRING THIS MORNING...WITH FOOT BRIDGES WASHED OUT AND 
  TREES UPROOTED. EVACUATIONS HAVE OCCURRED IN SUPAI. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HUALAPAI
  HILLTOP TRAIL DOWN TO SUPAI...CATARACT CREEK AND HAVASU CREEK TO THE 
  CONFLUENCE WITH THE COLORADO RIVER.

DO NOT TRAVEL TO OR FROM THE HUALAPAI HILLTOP TO SUPAI TODAY 
SEEK HIGHER GROUND IMMEDIATELY. 

LAT...LON 3631 11277 3633 11275 3633 11273 3635 11272
      3635 11267 3642 11261 3576 11236 3575 11248
      3629 11281

$$

41

3 follow-up statements

000 
WGUS75 KFGZ 171709
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
952 AM MST SUN AUG 17 2008

AZC005-171945-
/O.CON.KFGZ.FF.W.0021.000000T0000Z-080817T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCONINO AZ-
952 AM MST SUN AUG 17 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM MST FOR WEST
CENTRAL COCONINO COUNTY...

AT 925 AM MST...SUPAI POLICE REPORTED THAT SIGNIFICANT EVACUATIONS 
WERE ONGOING IN THE SUPAI AREA DUE TO ONGOING FLASH FLOODING. WHILE 
WATER LEVELS ARE CURRENTLY RECEEDING...FOOT BRIDGES AND HIKING 
TRAILS HAVE BEEN WASHED OUT AND TREES HAVE BEEN UPROOTED. 
ADDITIONALLY...REDLANDS DAM...LOCATED APPROXIMATELY 45 MILES 
UPSTREAM...WAS BREACHED EARLY THIS MORNING AND ADDITIONAL WATERS ARE 
MOVING DOWN CATARACT CANYON. THIS WILL CONTINUE THE FLASH FLOOD 
THREAT TO CATARACT CREEK AND THE SUPAI AREA. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HUALAPAI  
  HILLTOP TRAIL DOWN TO SUPAI...CATARACT CREEK AND HAVASU CREEK TO   
  THE CONFLUENCE WITH THE COLORADO RIVER.

DO NOT TRAVEL TO OR FROM THE HUALAPAI HILLTOP TO SUPAI TODAY IF YOU 
ENCOUNTER RISING WATER...SEEK HIGHER GROUND IMMEDIATELY. 

LAT...LON 3631 11277 3633 11275 3633 11273 3635 11272
      3635 11267 3642 11261 3576 11236 3575 11248
      3629 11281

$$

STAUDENMAIER

000 
WGUS55 KFGZ 171941
FFWFGZ
AZC005-180145-
/O.EXT.KFGZ.FF.W.0021.000000T0000Z-080818T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1238 PM MST SUN AUG 17 2008

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL COCONINO COUNTY IN NORTH CENTRAL ARIZONA...

* UNTIL 645 PM MST SUNDAY

* AT 1230 PM MST...ADDITIONAL FLOOD WATERS CONTINUE TO MOVE DOWN 
CATARACT CANYON DUE TO A BREACH IN REDLANDS DAM WEST OF VALLE. IN 
ADDITION...THE SUPAI POLICE DEPARTMENT REPORTS THAT EXTENSIVE 
FLOODING DUE TO HEAVY RAIN SATURDAY IS ALREADY OCCURRING ON 
CATARACT CREEK IN SUPAI VILLAGE. EVACUATIONS ARE ONGOING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
SUPAI...HUALAPAI HILLTOP TRAIL DOWN TO SUPAI...CATARACT CREEK...AND 
HAVASU CREEK TO THE CONFLUENCE WITH THE COLORADO RIVER.

FLOOD WATERS FROM A DAM BREAK AND HEAVY RAINS ON SATURDAY ARE MOVING 
DOWN CATARACT CREEK FROM WEST OF VALLE TO SUPAI VILLAGE. THE FLOOD 
CREST FROM THE DAM BREAK WILL LIKELY TAKE PLACE BETWEEN 2 AND 6 PM 
MST...ALTHOUGH FLOODING IS ALREADY OCCURRING. ADDITIONAL SHOWERS AND 
THUNDERSTORMS ARE LIKELY TODAY. DO NOT TRAVEL TO OR FROM HUALAPAI 
HILLTOP TO SUPAI TODAY SEEK HIGHER GROUND IMMEDIATELY. 

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
FLAGSTAFF.

LAT...LON 3631 11277 3633 11275 3633 11273 3635 11272
      3635 11267 3642 11261 3576 11236 3575 11248
      3629 11281

$$

DJO

000 
WGUS75 KFGZ 180137
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
636 PM MST SUN AUG 17 2008

AZC005-180146-
/O.EXP.KFGZ.FF.W.0021.000000T0000Z-080818T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCONINO AZ-
636 PM MST SUN AUG 17 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM MST FOR WEST CENTRAL
COCONINO COUNTY...

THE FLASH FLOOD WARNING HAS BEEN REPLACED BY A NEW FLASH FLOOD 
WARNING. THE WARNED AREA REMAINS IN A FLASH FLOOD WARNING THROUGH
MIDNIGHT TONIGHT.

LAT...LON 3631 11277 3633 11275 3633 11273 3635 11272
      3635 11267 3642 11261 3576 11236 3575 11248
      3629 11281

$$

DJO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 6:26 PM MST	Areal Flood Advisory	FGZ	Coconino	12 hr
Aug 17, 12:19 AM MST	Flash Flood Warning	FGZ	Coconino	6 hr
Aug 17, 1:50 PM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 17, 2:41 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	34 min
Aug 17, 3:10 PM MST	Flash Flood Warning	FGZ	Coconino	3 hr
Aug 17, 3:38 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	21 min
Aug 17, 4:53 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	28 min

Nearby

Flash Flood Warnings in Arizona, 2008 Every flash flood warning in 2008

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.