Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 17, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 10, 1997, 10:27 PM MST for Coconino County, Arizona. It was in force for 2 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
- Aug 10, 1997, 10:27 PM MST (05:27 UTC)
- Expired
- Aug 11, 1997, 12:30 AM MST
- In force
- 2 hr
- 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 05:30 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, 5.5 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.
- Mixed-layer CAPE
- 147 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1399 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFLG 110528 FFWFLG AZC005-110710- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1027 PM MST SUN AUG 10 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1230 AM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL ARIZONA ...NORTHWESTERN COCONINO COUNTY AT 1020 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS WERE AGAIN PRODUCING RAIN OVER THE CATARACT CREEK...ABOUT 8 MILES SOUTH OF THE SUPAI VILLAGE. ALSO...MORE SHOWERS AND THUNDERSTORMS WILL APPROACH THIS REGION THROUGH 1230 AM. THESE RAINS WILL LIKELY CAUSE THE ALREADY SWOLLEN CREEK TO FLOW OUT OF ITS BANKS YET AGAIN. PEOPLE IN THE SUPAI VILLAGE ALONG AND NEAR THESE CREEKS SHOULD BE PRPARED FOR MORE FLOOD WATERS AND MOVE TO HIGHER GROUND NOW. IN ADDITION...CAMPERS ALONG OR NEAR THE COLORADO RIVER NEAR ITS JUNCTION WITH THE HAVASU CREEK SHOULD BE, PREPARED FOR RAPIDLY RISING WATER AND MOVE TO HIGHER GROUND NOW. 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 Aug 10, 7:30 PM MST, 2 hours 57 minutes earlier.
Area forecast discussion, Aug 10, 7:30 PM MST, 2 hours 57 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 730 PM MST SUN AUG 10 1997 THIS IS EARLY DUE TO OTHER PRESSING NEEDS. THUNDERSTORMS WITH HEAVY RAIN CONTINUE OVER FAR NORTHWEST AZ. IMAGES FROM SURROUNDING 88DS INDICATE BULK OF T-STORM ACTIVITY SLOWLY MOVING TOWARDS NW PORTIONS OF THE CWA. RAMSDIS WV IMAGERY SHOWS WELL DEFINED VORTICITY FEATURE MOVING INTO S NEVADA WHICH IS HELPING CONVECTION ALONG. WITH UPPER LEVEL JET FEATURE PROGGED TO MOVE THROUGH NORTHWEST AZ TONIGHT AND APPARENT UPPER-MID TO UPPER LEVEL MOISTURE TAP INTO THIS REGION... WILL EXTEND FLASH FLOOD WATCH FOR ZONES 4-7 TIL 4 AM MST MONDAY. ELSEWHERE...CONVECTION IS MOSTLY ISOLATED IN NATURE AND WILL C\ONTINUE THIS TREND IN THE 800 PM UPDATE. OTHER PERIODS LEFT MOSTLY AS IS. FLG 3422 INW 2422 PASSETTI FLG...FLASH FLOOD WATCH UNTIL 4 AM MST FOR ZONES 4-7
In the hours before
Local storm report, Aug 10, 7:49 PM MST, 2 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF ARIZONA
749 PM MST SUN AUG 10 1997
TIME(MST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1015 AM SUPAI AZ FLASH FLOODING
08/10/97 COCONINO HEAVY RAINS FROM
REOCCURRING THUNDERSTORMS
CAUSED A FLASH FLOOD ALONG
CATARACT CREEK IN THE
VILLAGE OF SUPAI. POWER,
WATER AND SEWAGE WASHED
OUT. MANY HOMES AND
STRUCTURES FLOODED. UP TO
400 CAMPERS AND RESIDENTS
EVACUATED BY HELICOPTER.
RED CROSS, BIA, NATIONAL
GUARD, AND LOCAL LAW
ENFORCEMENT PARTICIPATED IN
THE EVACUATION.
1205 PM GRAND CANYON NP AZ FLASH FLOODING
08/10/97 COCONINO WHITE WATER RAFT NEAR THE
JUNCTION OF HAVASU CREEK
AND COLORADO RIVER CAUGHT
IN FLASH FLOOD WATERS.
SEARCH AND RESCUE
OPERATIONS PRESENTLY
UNDERWAY.Local storm report, Aug 10, 7:50 PM MST, 2 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF ARIZONA
749 PM MST SUN AUG 10 1997
TIME(MST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1015 AM SUPAI AZ FLASH FLOODING
08/10/97 COCONINO HEAVY RAINS FROM
REOCCURRING THUNDERSTORMS
CAUSED A FLASH FLOOD ALONG
CATARACT CREEK IN THE
VILLAGE OF SUPAI. POWER,
WATER AND SEWAGE WASHED
OUT. MANY HOMES AND
STRUCTURES FLOODED. UP TO
400 CAMPERS AND RESIDENTS
EVACUATED BY HELICOPTER.
RED CROSS, BIA, NATIONAL
GUARD, AND LOCAL LAW
ENFORCEMENT PARTICIPATED IN
THE EVACUATION.
1205 PM GRAND CANYON NP AZ FLASH FLOODING
08/10/97 COCONINO WHITE WATER RAFT NEAR THE
JUNCTION OF HAVASU CREEK
AND COLORADO RIVER CAUGHT
IN FLASH FLOOD WATERS.
SEARCH AND RESCUE
OPERATIONS PRESENTLY
UNDERWAY.The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 12:22 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 63 min |
| Aug 11, 12:33 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 52 min |
| Aug 11, 12:35 PM MST | Severe Thunderstorm Warning | FGZ | Navajo | 55 min |
| Aug 11, 1:28 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 47 min |
| Aug 11, 1:43 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 62 min |
| Aug 11, 2:47 PM MST | Severe Thunderstorm Warning | FGZ | Apache | 43 min |
| Aug 11, 3:13 PM MST | Severe Thunderstorm Warning | FGZ | Apache | 32 min |
| Aug 11, 3:46 PM MST | Severe Thunderstorm Warning | FGZ | Apache | 64 min |
| Aug 11, 3:56 PM MST | Flash Flood Warning | FGZ | Apache | 2 hr |
| Aug 11, 4:38 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 37 min |
Nearby
Flash Flood Warnings in Arizona, 1997Every 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.