Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 14, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 25, 1998, 4:26 PM MST for Coconino County, Arizona. It was in force for 94 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 25, 1998, 4:26 PM MST (23:26 UTC)
- Expired
- Aug 25, 1998, 6:00 PM MST
- In force
- 94 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 23:28 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, 11.4 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1886 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 58 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 252327 FFWFLG AZC005-260100- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 426 PM MST TUE AUG 25 1998 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHWESTERN COCONINO COUNTY IN NORTH CENTRAL ARIZONA * UNTIL 600 PM MST * AT 420 PM MST...SPOTTERS REPORTED HEAVY RAIN OCCURRING OVER SUPAI VILLAGE. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN WAS OCCURRING JUST NORTH OF SUPAI VILLAGE. * HAVASU CANYON BELOW SUPAI VILLAGE WILL EXPERIENCE RAPID RISES IN WATER. IF YOU ARE LOCATED IN AREAS PRONE TO FLOODING BELOW SUPAI VILLAGE ALONG HAVASU CREEK...MOVE TO HIGHER GROUND. IF YOU ARE IN THE WARNING AREA... MOVE TO HIGHER GROUND AT ONCE.
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 25, 2:29 PM MST, 1 hour 57 minutes earlier.
Area forecast discussion, Aug 25, 2:29 PM MST, 1 hour 57 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 200 PM TUE AUG 25 1998 SYNOPSIS...A DRYING TREND IS EXPECTED LATER TONIGHT THROUGH THURSDAY. THIS WILL BRING A DECREASE IN THUNDERSTORM ACTIVITY...HOWEVER ENOUGH LOW LEVEL MOISTURE REMAINS FOR A CHANCE OF THUNDERSTORMS EACH DAY. SOME MONSOONAL MOISTURE MAY WOK BACK NORTH IN THE EXTENDED LEAVING THE THREAT FOR THUNDERSTORMS INTO THE WEEKEND. DISCUSSION...DRYING EVIDENT BEHIND WEAK S/WV IN CENTRAL ARIZONA. THIS S/WV TO EJECT NORTHEAST OUT OF STATE TONIGHT...BUT NOT BEFORE ENHANCING SOME THUNDERSTORM ACTIVITY FOR THE REST OF TODAY. WITH DRYING AIR...TSTORMS NOT LIKELY TO LAST MUCH PAST SUNSET...SHOULD BE MAINLY CLEAR AFTER MIDNIGHT. ENOUGH RESIDUAL MOISTURE REMAINS WEDNESDAY FOR ADDITIONAL TSTORMS...ALTHOUGH AREAL COVERAGE TO BE MUCH LESS WITH MAIN FOCUSING ALONG RIMS. MODELS DIFFER DRASTICALLY INTO THURSDAY WITH NGM/AVN GOING VERY DRY. ETA MODEL RESPONDS TO MORE WEAKNESS IN THE EAST PACIFIC AND ALLOWING QUITE A BIT OF GULF MOISTURE TO RETURN INTO ARIZONA. WITH AMOUNT OF MOISTURE IN THE GULF RIGHT NOW...IT IS CONCEIVABLE THAT SOME WILL RETURN BACK NORTH THURSDAY AND THROUGH THE EXTENDED WITH GENERAL HIGH PRESSURE OVER THE SOUTHWEST. WILL NOT DRY OUT ZONES BUT WILL STAY WITH CHANCE TYPE POPS THURSDAY THROUGH EXTENDED. SFC TEMPS TO WARM SLIGHTLY NEXT FEW DAYS AS CLOUD COVER DECREASES AND WILL REFLECT THIS IN ZONES. PETERSON FLG3423 INW3222 FLG...NONE.
Nearby
Flash Flood Warnings in Arizona, 1998Every flash flood warning in 1998
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.