Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 11, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 4, 1997, 4:45 PM MST for Coconino County, Arizona. It was in force for 105 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 4, 1997, 4:45 PM MST (23:45 UTC)
- Expired
- Aug 4, 1997, 6:30 PM MST
- In force
- 105 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 23:44 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, 11.8 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
- 381 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFLG 042348 FFWFLG AZC005-050135- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 445 PM MST MON AUG 4 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 630 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL ARIZONA ...SOUTH CENTRAL COCONINO COUNTY ...FLASH FLOOD WARNING FOR SOUTH CENTRAL COCONINO COUNTY EXTENDED UNTIL 630 PM MST... AT 440 PM MST...FLAGSTAFF DOPPLER RADAR CONTINUED TO INDICATE STRONG THUNDERSTORMS OVER SOUTH CENTRAL COCONINO COUNTY FROM FLAGSTAFF SOUTH TO THE YAVAPAI COUNTY BORDER PRODUCING VERY HEAVY RAIN. THESE STORMS WERE FOLLOWING EACH OTHER IN A NORTHWARD PROGRESSION. OVER 3 INCHES OF RAINFALL HAS BEEN ESTIMATED BY RADAR AND VERIFIED BY SPOTTERS IN SEVERAL LOCATIONS IN SOUTH CENTRAL COCONINO COUNTY TODAY. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UPHILL TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
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 4, 1:55 PM MST, 2 hours 50 minutes earlier.
Area forecast discussion, Aug 4, 1:55 PM MST, 2 hours 50 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 150 PM MST MON AUG 04 1997 BUSY AFTERNOON HERE AT FLG...WITH SEVERAL FFW'S ISSUED WITH SOME FLOODING REPORTED.. FROM A QUICK GLANCE AT 12Z DATA MODELS INDICATING LITTLE CHANGE ON TAP FOR THE NEXT FEW DAYS..ALBEIT A BIT OF DRYING WILL OCCUR. VORT MAX OVER NW AZ CONTINUES TO EXIT THE STATE...BUT WITH LOTS OF LOW LEVEL MOISTURE IN PLACE...THIS ALLOWED SOME HEAVY RAIN PRODUCING THUNDERSTORMS OVER THE AREA. ONE REPORT RECEIVED OF 2 INCHES OF RAIN IN HALF HOUR. FOR THE LONGER TERM...WILL KEEP SCATTERED POPS FOR THE NEXT FEW DAYS...AS THERE IS NOT MUCH SIGH OF BREAKING OUT OF THE PATTERN. FOR TEMPS...NOT MUCH CHANGE HERE EITHER...AS MAX TEMPS WILL DEPEND MAINLY ON CLOUD COVER...EXPECT A BIT OF WARMING OVER THE NEXT FEW DAYS...AS SOUTHERLY FLOW CONTINUES...WITH LESS CLOUDS TO PROVIDE A BIT MORE DAYTIME HEATING. FLG 423 INW 522 FLG...FLASH FLOOD WATCH UNTIL 5PM FOR ZONES 009 012 013 015 016
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 6:06 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 4, 12:02 PM MST | Flash Flood Warning | FGZ | Coconino | 118 min |
| Aug 4, 12:02 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 118 min |
| Aug 4, 12:53 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 4, 1:19 PM MST | Flash Flood Warning | FGZ | Coconino | 4 hr |
| Aug 4, 2:30 PM MST | Tornado Warning | FGZ | Coconino | 35 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.