Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 1, NWS Flagstaff, AZ

July 22, 1997Coconino County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 22, 1997, 1:11 PM MST for Coconino County, Arizona. It was in force for 119 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: Jul 22, 1997, 1:11 PM MST (20:11 UTC)
Expired: Jul 22, 1997, 3:10 PM MST
In force: 119 min
Issued by: NWS Flagstaff, AZ
Area: Whole counties

County Coconino County, AZ

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 20:14 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, 8.2 hours before the alert went out and 68 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: 96 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFLG 222011
FFWFLG
AZC005-222210-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
111 PM MST TUE JUL 22 1997

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 310 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL ARIZONA

   ...SOUTH CENTRAL COCONINO COUNTY
 
...FLASH FLOOD WARNING FOR U.S. HIGHWAY 89 FROM DONEY PARK TO 10
MILES NORTH OF SUNSET CRATER UNTIL 300 PM MST...

...THIS WARNING REPLACES THE PREVIOUS URBAN AND SMALL STREAM FLOOD
ADVISORY FOR THIS AREA...

A SERIES OF STRONG THUNDERSTORMS HAS CONTINUED TO MOVE OVER THE
SUNSET CRATER...DONEY PARK AND FERNWOOD AREAS. REPORTS OF ALMOST 2
FEETt OF WATER ON RURAL DIRT ROADS IN THIS AREA HAVE BEEN RECEIVED
BY THE NATIONAL WEATHER SERVICE.

IF YOU ARE IN THIS AREA DO NOT DRIVE INTO ROADS COVERED WITH
WATER. IF FLOOD WATERS THREATEN YOUR AREA...MOVE TO HIGHER GROUND.
 
&&

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 22, 8:55 AM MST, 4 hours 16 minutes earlier.

Area forecast discussion, Jul 22, 8:55 AM MST, 4 hours 16 minutes before

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
855 AM MST TUE JUL 22 1997

SKIES ARE CLEARING AROUND FLG THIS MORNING...JUST IN TIME FOR THE
GROUND TO START HEATING UP TO BUILD A FEW CU. RAIN SHOWERS CONTINUED
LAST NIGHT FOR A NICE CHANGE IN THE WEATHER FOR THE NORTHLAND. TODAY
NRN AZ WILL BEGIN A MORE TYPICAL RAIN PATTERN WITH DAYTIME CONVECTION
AND NIGHTTIME CLEARING...AND IT LOOKS LIKE THIS WILL TAKE US THROUGH
THE WEEK.

TODAY SHOULD BE AN INTERESTING DAY...THE MODIFIED 12Z SOUNDING AT FGZ
REACHES A CAPE OF 1600 J/KG...LIS AT -4...SO ITS JUST A WAITING
GAME AT THIS POINT. CONVECTION SHOULD BEGIN NEAR THE WHITE MTNS BY
18Z...AND THE WRN MOGOLLON RIM BY 19-20Z. LOCALLY HEAVY RAIN AND
SMALL HAIL ARE LIKELY TO BE THE MAIN WX PLAYERS FOR US SURFACE
DWELLERS.

THE REST OF THE FORECAST LOOKS PRETTY STRAIGHTFORWARD...HIGH
SCATTERED POPS ALONG THE RIM COUNTRY SHOULD COVER THINGS WITH
CLEARING AT NIGHT...LOW SCATTERED ELSEWHERE. OVERNIGHT LOWS WILL COOL
OFF TONIGHT AND LEVEL OFF THE NEXT FEW NIGHTS. DAYTIME HIGHS WILL
WARM UP JUST A BIT WITH LESS CLOUD COVER OVERHEAD. WINDS NOT TO BE A
PROBLEM THIS PD...WILL HAVE TO KEEP AN EYE ON SFC DEWPOINTS AND
BOUNDARY LAYER MOISTURE BEFORE THEY DEMAND ATTENTION.

FOR NOW...THE FCST LOOKS IN FINE SHAPE AND NO UPDATES ARE NECESSARY
THIS MORNING.

FLG 6353  INW 4232
FLG...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 1:15 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	65 min
Jul 22, 1:51 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	44 min
Jul 22, 3:04 PM MST	Flash Flood Warning	FGZ	Coconino	116 min

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.