Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 7, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 14, 1999, 11:43 AM MST for Coconino County, Arizona. It was in force for 72 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 14, 1999, 11:43 AM MST (18:43 UTC)
- Expired
- Jul 14, 1999, 12:55 PM MST
- In force
- 72 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 18:46 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
Phoenix, AZ (KPSR), launched 12:00Z, 6.7 hours before the alert went out and 268 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
- 513 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1695 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 14, 8:55 AM MST, 2 hours 48 minutes earlier.
Area forecast discussion, Jul 14, 8:55 AM MST, 2 hours 48 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
855 AM MST WED JUL 14 1999
SYNOPSIS...ABUNDANT MOISTURE WILL REMAIN OVER NORTHERN ARIZONA INTO
THURSDAY WITH SHOWERS AND THUNDERSTORMS CONTINUING ACROSS THE
NORTHERN ARIZONA. A WEATHER DISTURBANCE WILL MOVE ACROSS NORTHERN
ARIZONA TODAY...CARRYING MOIST AND UNSTABLE AIR WITH IT...RESULTING
IN ANOTHER DAY OF HEAVY RAINFALL. A SLOW DRYING TREND WILL BEGIN AT
THE END OF THE WEEK AND SCATTERED THUNDERSTORM ACTIVITY WILL
CONTINUE INTO FRIDAY.
DISCUSSION...FORECAST FOCUS THIS PERIOD WILL BE ON THE SRN NEVADA
VORT MAX AND HOW IT MAY AFFECT PRECIP DEVELOPMENT ACROSS NRN AZ. SO
FAR...STORMS HAVE BEEN CONFINED TO CENTRAL YAVAPAI COUNTY...MOVING
INTO SOUTHEASTERN COCONINO COUNTY. WATER VAPOR IMAGERY INDICATED
DECENT PLUME OF MOISTURE EXTENDING S INTO OLE MEX ALLOWING
DEVELOPMENT OF DECENT MOISTURE TAP FOR STORMS. 12Z ETA AND LAST
NIGHTS MSO INITIALIZED VORT MAX MOVING ACROSS N AZ WELL AND THIS
FEATURE SHOULD PROVIDE THE FOCUS FOR CONTINUES CONVECTIVE
DEVELOPMENT ACROSS THE FFA AREA. FCST WORDED FOR HEAVY RAIN...AND
COVERING EXPTD CONDITIONS WELL. MCGRATH
.FLG...FLASH FLOOD WATCH FROM 9 AM TO 9 PM MST FOR AZ ZONES
004>009-012-013-015>018-037-038-040.In the hours before
Special weather statement, Jul 14, 9:30 AM MST, 2 hours 13 minutes before
AZZ004>018-037>040-142230- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST WED JUL 14 1999 ...THUNDERSTORMS WITH LOCALLY HEAVY RAIN EXPECTED ACROSS PORTIONS OF NORTHERN ARIZONA TODAY... ...FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN ARIZONA UNTIL 9 PM MST... SKYWARN ACTIVATION MAY BE REQUIRED TODAY. RAIN REPORTS NEEDED FROM SPOTTERS TODAY. DISCUSSION...THUNDERSTORMS...ASSOCIATED WITH A DISTURBANCE MOVING ACROSS NORTHERN ARIZONA TODAY WILL PRODUCE HEAVY DOWNPOURS ACROSS YAVAPAI COUNTY...COCONINO COUNTY...AND PORTIONS OF APACHE AND NAVAJO COUNTIES. A FLASH FLOOD WATCH IS IN EFFECT FOR YAVAPAI COUNTY...COCONINO COUNTY...AND PORTIONS OF NAVAJO AND APACHE COUNTIES UNTIL 9 PM MST. A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR FLASH FLOODING IN THE WATCH AREA. IF YOU ARE IN THE WATCH AREA...BE PREPARED TO MOVE TO HIGHER GROUND. RAINFALL OVER THE LAST THREE DAYS HAS SATURATED SOILS ACROSS PORTIONS OF THE WATCH AREA. AN UPPER LEVEL DISTURBANCE PASSING OVER NORTHERN ARIZONA TODAY WILL COMBINE WITH THE VERY MOIST AIRMASS OVER THE STATE TO PRODUCE THUNDERSTORMS. RAINFALL RATES UP TO TWO INCHES PER HOUR ARE POSSIBLE FROM SOME THUNDERSTORMS TODAY. FLOODING OF LOW LYING AREAS AND WASHES...MAY OCCUR WITH THESE THUNDERSTORMS. CANYON AREAS ARE PARTICULARLY SUSCEPTIBLE TO FLASH FLOODING. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE MEDIA SOURCE FOR THE LATEST WEATHER INFORMATION.
Special weather statement, Jul 14, 9:30 AM MST, 2 hours 13 minutes before
AZZ004>018-037>040-142230- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST WED JUL 14 1999 ...THUNDERSTORMS WITH LOCALLY HEAVY RAIN EXPECTED ACROSS PORTIONS OF NORTHERN ARIZONA TODAY... ...FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN ARIZONA UNTIL 9 PM MST... SKYWARN ACTIVATION MAY BE REQUIRED TODAY. RAIN REPORTS NEEDED FROM SPOTTERS TODAY. DISCUSSION...THUNDERSTORMS...ASSOCIATED WITH A DISTURBANCE MOVING ACROSS NORTHERN ARIZONA TODAY WILL PRODUCE HEAVY DOWNPOURS ACROSS YAVAPAI COUNTY...COCONINO COUNTY...AND PORTIONS OF APACHE AND NAVAJO COUNTIES. A FLASH FLOOD WATCH IS IN EFFECT FOR YAVAPAI COUNTY...COCONINO COUNTY...AND PORTIONS OF NAVAJO AND APACHE COUNTIES UNTIL 9 PM MST. A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR FLASH FLOODING IN THE WATCH AREA. IF YOU ARE IN THE WATCH AREA...BE PREPARED TO MOVE TO HIGHER GROUND. RAINFALL OVER THE LAST THREE DAYS HAS SATURATED SOILS ACROSS PORTIONS OF THE WATCH AREA. AN UPPER LEVEL DISTURBANCE PASSING OVER NORTHERN ARIZONA TODAY WILL COMBINE WITH THE VERY MOIST AIRMASS OVER THE STATE TO PRODUCE THUNDERSTORMS. RAINFALL RATES UP TO TWO INCHES PER HOUR ARE POSSIBLE FROM SOME THUNDERSTORMS TODAY. FLOODING OF LOW LYING AREAS AND WASHES...MAY OCCUR WITH THESE THUNDERSTORMS. CANYON AREAS ARE PARTICULARLY SUSCEPTIBLE TO FLASH FLOODING. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE MEDIA SOURCE FOR THE LATEST WEATHER INFORMATION.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:40 PM MST | Flash Flood Warning | FGZ | Yavapai | 115 min |
| Jul 13, 7:35 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 hr |
| Jul 14, 12:32 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 48 min |
| Jul 14, 12:59 PM MST | Flash Flood Warning | FGZ | Coconino | 116 min |
| Jul 14, 1:19 PM MST | Flash Flood Warning | FGZ | Gila | 3 hr |
| Jul 14, 1:40 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 14, 1:42 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 43 min |
| Jul 14, 3:45 PM MST | Flash Flood Warning | FGZ | Coconino | 105 min |
| Jul 14, 4:32 PM MST | Flash Flood Warning | FGZ | Yavapai | 53 min |
Nearby
Flash Flood Warnings in Arizona, 1999Every flash flood warning in 1999
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.