Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 21, NWS Flagstaff, AZ

August 26, 1997Apache County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 26, 1997, 11:46 AM MST for Apache County, Arizona. It was in force for 89 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 26, 1997, 11:46 AM MST (18:46 UTC)
Expired: Aug 26, 1997, 1:15 PM MST
In force: 89 min
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 18:50 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, 6.8 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-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: 74 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1496 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 53 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 
TTAA00 KFLG 261847
FFWFLG
AZC001-262015-

BULLTIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1146 AM MST TUE AUG 26 1997

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 PM MST
AND A FLASH FLOOD WARNING EFFECTIVE UNTIL 115 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHEASTERN ARIZONA

   ...NORTHERN APACHE COUNTY
 
AT 1240 MDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM WITHIN A MILE OF MANY FARMS...MOVING TOWARD THE
NORTHEAST AT 20 MPH.  THE COMMUNITY OF ROUND ROCK IS ALSO IN THE
PATH OF THIS STORM.
 
IF YOU ARE CAUGHT OUTSIDE...TRY TO FIND SHELTER IN A WELL PROTECTED
AREA UNTIL THE STORM HAS PASSED. SEVERE THUNDERSTORMS PRODUCE
DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND FREQUENT
LIGHTNING. FLASH FLOODING IS ALSO LIKELY WITH THIS STORM.  AVOID
NORMALLY DRY WASHES AND MOVE TO HIGHER GROUND IMMEDIAnTELY.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 11:46 AM MST	Severe Thunderstorm Warning	FGZ	Apache	89 min
Aug 26, 1:32 PM MST	Flash Flood Warning	FGZ	Apache	58 min
Aug 26, 1:32 PM MST	Severe Thunderstorm Warning	FGZ	Apache	58 min
Aug 26, 2:30 PM MST	Flash Flood Warning	FGZ	Apache	65 min
Aug 26, 2:30 PM MST	Severe Thunderstorm Warning	FGZ	Apache	65 min
Aug 26, 2:55 PM MST	Flash Flood Warning	FGZ	Coconino	3 hr

Nearby

Flash Flood Warnings in Arizona, 1997 Every flash flood warning in 1997

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.