Alert archive / Arizona / Flash Flood Warnings in 2007

Flash Flood Warning 21, NWS Flagstaff, AZ

July 27, 2007Apache County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 27, 2007, 7:00 PM MST for Apache County, Arizona. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 27, 2007, 7:00 PM MST (02:00 UTC)
Expired
Jul 27, 2007, 9:45 PM MST
In force
3 hr
Issued by
NWS Flagstaff, AZ
Area
Whole counties

County Apache County, AZ

The radar

The Flagstaff radar (KFSX), 181 km from the middle of the area, began a volume at 02:03 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 was reported inside it

TimeReportWhereRemark
Jul 27, 7:00 PM MSTFLASH FLOODE St. Johns, AZNUMEROUS ROAD CLOSURES DUE TO HIGHWATER AND MUD BETWEEN ST. JOHNS AND SPRINGERVILLE...BETWEEN ST. JOHNS AND HUNT...BETWEEN ST. JOHNS AND CONCHO...AND BETWEEN CONCHO AND HUNT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 2.0 hours before the alert went out and 210 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 2007-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 99 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2007-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.1939Sfc1 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
99 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
836 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
42 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 280202
FFWFGZ
AZC001-280445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
700 PM MST FRI JUL 27 2007

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SOUTHERN APACHE COUNTY IN NORTHEAST ARIZONA...

* UNTIL 945 PM MST

* AT 650 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  VERY HEAVY RAIN FROM SEVERAL NEARLY STATIONARY THUNDERSTORMS 
  EXTENDING FROM 10 MILES NORTHEAST OF HOLBROOK ALONG INTERSTATE 40
  SOUTH THROUGH HUNT AND CONCHO TO LYMAN LAKE STATE PARK. THE 
  STRONGEST THUNDERSTORMS WERE CURRENTLY LOCATED 5 TO 10 MILES EAST 
  OF THE PETRIFIED FOREST VISITOR CENTER AND SOUTH THROUGH HUNT. 
  RADAR RAINFALL ESTIMATES THAT 2 TO 4 INCHES OF RAIN HAVE FALLEN 
  OVER PORTIONS OF THIS AREA ESPECIALLY FROM HUNT TO AROUND 10 MILES 
  NORTH SINCE 600 PM MST...WITH IN THIS AREA RADAR HAS ESTIMATED 3 
  TO 4.5 INCHES OF RAIN HAS FALLEN.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE WEST 
  SIDE OF ST. JOHNS...HUNT...CONCHO...LYMAN LAKE STATE PARK... 
  PETRIFIED FOREST VISITOR CENTER.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH 800 PM MST.

ROADS AFFECTED IN THIS AREA BUT NOT LIMITED TO ARE HIGHWAY 180 FROM 
ST. JOHNS NORTHWEST TO THE NAVAJO COUNTY LINE...AND HIGHWAY 180A.

LAW ENFORCEMENT HAS REPORTED THE FOLLOWING ROAD CLOSURES...BETWEEN 
HUNT AND ST. JOHNS...BETWEEN ST. JOHNS AND CONCHO...BETWEEN ST. 
JOHNS AND SPRINGERVILLE...AND BETWEEN HUNT AND CONCHO...ALL DUE TO  
HIGHWATER AND DEBRIS ACROSS THE ROADWAYS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3419 10945 3425 10937 3428 10919 3447 10935
      3510 10960 3503 10983 3465 10983 3431 10979
      3426 10951

$$
TC
2 follow-up statements
000 
WGUS75 KFGZ 280344
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
845 PM MST FRI JUL 27 2007

AZC001-280445-
APACHE AZ-
845 PM MST FRI JUL 27 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST FOR
SOUTHERN APACHE COUNTY...

AT 840 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES 
THAT THE STORMS THAT CAUSE THE FLOODING EARLIER THIS EVENING HAVE 
WEAKENED SIGNIFICANTLY...HOWEVER GIVEN THE WIDESPREAD 2 TO 4.5 
INCHES OF RAIN THAT HAVE FALLEN OVER THE WARNED AREA...FLOODING 
PROBLEMS WILL CONTINUE TO LINGER THROUGH 945 PM MST.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE WEST   
SIDE OF ST. JOHNS...LYMAN LAKE STATE PARK...HUNT AND CONCHO AND 
AREAS JUST TO THE WEST OF PETRIFIED FOREST NATIONAL PARK VISITORS 
CENTER. 

ANOTHER AREA OF SHOWERS AND THUNDERSTORMS IS DEVELOPING TO THE 
NORTHEAST AND IS MOVING TOWARD THE WARNING AREA...HOWEVER THE RAIN 
FALL AMOUNTS AND INTENSITY FROM THESE THUNDERSTORMS IS MUCH LIGHTER 
...THEIR MAIN EFFECT MAY BE TO KEEP THE FLOODED AREAS FLOODED FOR A 
LITTLE LONGER DURATION. 

EXCESSIVE RUNOFF FROM THE HEAVY RAINFALL THIS EVENING WILL CONTINUE 
TO CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS 
WELL AS LOW WATER CROSSING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 3419 10945 3425 10937 3428 10919 3447 10935
      3510 10960 3503 10983 3465 10983 3431 10979
      3426 10951

$$
000 
WGUS75 KFGZ 280454
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
945 PM MST FRI JUL 27 2007

AZC001-280515-
APACHE AZ-
945 PM MST FRI JUL 27 2007

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHERN APACHE COUNTY...

AT 945 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES 
THAT THE STORMS THAT CAUSE THE FLOODING EARLIER THIS EVENING HAVE 
WEAKENED SIGNIFICANTLY...HOWEVER GIVEN THE WIDESPREAD 2 TO 4.5 
INCHES OF RAIN THAT HAS FALLEN...STREAM AND WASHES IN THE THE AREA 
WILL CONTINUE TO RUN FULL OR OUT OF THEIR BANKS TONIGHT. MORE 
SHOWERS AND THUNDERSTORMS ARE APPROACHING FROM THE NORTHWEST AND 
WILL MOVE OVER THE AREA PREVIOUSLY UNDER THE WARNING...HOWEVER THE 
INTENSITY OF THESE SHOWERS AND THUNDERSTORMS ARE LIGHT ENOUGH THAT 
THEY WILL NOT POSE A FLOOD THREAT OTHER THAN PROLONG THE DURATION OF 
HIGH FLOWS IN THE AREA.  

THE FLASH FLOOD WARNING WILL BE REPLACE BY A SMALL STREAM FLOOD 
ADVISORY DUE THE THE LARGE AMOUNTS OF RAIN THAT HAS FALLEN ACROSS 
THE AREA. 

THE AREA THAT WILL GO UNDER THE ADVISORY WILL INCLUDE PETRIFIED 
FOREST NATIONAL PARK...CONCHO...HUNT...AND THE AREA AROUND LYMAN 
LAKE STATE PARK. OTHER AREAS THAT WILL BE INCLUDED WILL BE THE 
LITTLE COLORADO RIVER FROM THE NAVAJO APACHE COUNTY LINE NORTHWEST 
TO AROUND HOLBROOK...WOODRUFF ALONG THE LITTLE COLORADO WILL ALSO BE 
INCLUDED. 


LAT...LON 3419 10945 3425 10937 3428 10919 3447 10935
      3510 10960 3503 10983 3465 10983 3431 10979
      3426 10951

$$
TC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 5:15 PM MSTFlash Flood WarningFGZApache90 min
Jul 27, 5:44 PM MSTFlash Flood WarningFGZApache3 hr
Jul 28, 4:54 AM MSTFlash Flood WatchFGZApache, Coconino, Gila, Navajo, Yavapai23 hr

Nearby

Flash Flood Warnings in Arizona, 2007Every flash flood warning in 2007

Sources

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