Alert archive / Arizona / Flash Flood Warnings in 1996

Flash Flood Warning 7, NWS Flagstaff, AZ

July 16, 1996Navajo County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 16, 1996, 6:53 PM MDT for Navajo County, Arizona. It was in force for 3 hr. 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 16, 1996, 6:53 PM MDT (00:53 UTC)
Expired
Jul 16, 1996, 9:50 PM MDT
In force
3 hr
Issued by
NWS Flagstaff, AZ
Area
Whole counties

County Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 00:52 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, 0.9 hours before the alert went out and 136 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 1996-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 89 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 1996-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
89 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1534 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
7 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 170055
FFWFLG
AZC005-017-170350-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
553 PM MST TUE JUL 16 1996

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 850 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL ARIZONA

   ...EAST CENTRAL COCONINO COUNTY

IN NORTHEAST ARIZONA

   ...WEST CENTRAL NAVAJO COUNTY
 
AT 550 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
INDICATING PERSISTENT...SLOW MOVING THUNDERSTORMS NEAR LEUPP
METEOR CITY AND WINSLOW.  RADAR IS ESTIMATING THAT LOCALLY 2 AND
1/2 INCHES OF RAIN HAS FALLEN WITH THESE STORMS DURING THE PAST
TWO HOURS.  IN ADDITION...REPORTS OF FULL WASHES HAVE BEEN
RECEIVED FROM THIS AREA.

AS THE THUNDERSTORMS ARE SLOW MOVERS...MORE HEAVY RAIN IS LIKELY
IN THIS AREA THIS EVENING...MAKING THE THREAT OF FLASH FLOODING
OF WASHES AND LOW LYING AREAS HIGH.

IF YOU ARE IN THIS AREA OF THE LI:TTLE COLORADO RIVER VALLEY
THIS EVENING DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD
AND MOVVE TO HIGHER GROUND.

PASSETTI

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 16, 3:01 PM MDT, 3 hours 52 minutes earlier.

Area forecast discussion, Jul 16, 3:01 PM MDT, 3 hours 52 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
200 PM MST TUE JUL 16 1996

IN SHORT TERM...COVERING SITUATION TODAY WITH FFS AND SPS PRODUCTS
AND HOLDING OFF ON FFA AS PROBLEMS LIKELY TO BE ISOLATED. SUSPECT
SCT ACTIVITY WILL LINGER ACROSS ZONES 7..12..13..14 TONIGHT AND
MAYBE INTO SOUTHERN ZONE 8 AS VORT ENERGY STRETCHES OUT ACROSS
CENTRAL PART OF STATE. ETA CARRIES THIS ENERGY NORTH WED WHICH
MAKES CENTRAL AREAS PRONE TO FLASH FLOOD.  IN THE MEANTIME...MAIN
TROF OVR NW PORTION OF COUNTRY FORCING SOME MID LEVEL AND POSSIBLY
PARTIAL LOW LEVEL DRYING INTO WEST. WILL NOT BUY ANYTHING LOCK AND
STOCK DUE TO NATURE OF MONSOON AND POOR MODEL VERIFICATION LATELY
FOR SUCH THINGS. WILL TREND POPS IN WEST DOWN...KEEP THEM UP FOR
NORTHCENTRAL AND EASTCENTRAL WHERE HEAVY RAIN AND FLOODING COULD BE
PROBLEM WED/WED EVE. A LITTLE DRIER IN EXTENDED...BUT NOT
ALTOGETHER DRY ANYWHERE. TEMPS WL REBOUND A BIT BY THU. SOME
OVRNIGHT ACTIVITY TONIGHT AND WED NIGHT POSSIBLE AND WILL WORD
ACCORDINGLY.

BT

In the hours before

Special weather statement, Jul 16, 5:32 PM MDT, 1 hour 21 minutes before
AZZ011-170030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
430 PM MST TUE JUL 16 1996

...THUNDERSTORMS WITH HEAVY RAIN NEAR I-40 BETWEEN METEOR CITY
AND WINSLOW...

AT 430 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
INDICATING THUNDERSTORMS WITH HEAVY RAIN NEAR THE JUNCTION OF
STATE ROUTE 87 AND INTERSTATE 40 BETWEEN METEOR CITY AND WINSLOW.

RADAR INDICATES THESE THUNDERSTORMS ARE PRODUCING VERY HEAVY
RAIN WHICH MAY CAUSE PONDING OF WATER ON AREA ROADS AND
HIGHWAYS.

MOTORISTS TRAVELLING IN THIS AREA DURING THE NEXT HOUR SHOULD BE
PREPARED FOR HEAVY RAIN WHICH MAY CAUSE PONDING OF WATER ON THE
ROADS MAKING FOR HAZARDOUS DRIVING CONDITIONS.  STAY TUINED TO
NOAA WEATHER RADIO OR LOCAL MEDIA FOR FUTURE WEATHER UPDATES.

PASSETTI

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 6:53 PM MDTFlash Flood WarningFGZCoconino3 hr

Nearby

Flash Flood Warnings in Arizona, 1996Every flash flood warning in 1996

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.