Alert archive / Arizona / Flash Flood Warnings in 2001
Flash Flood Warning 4, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 10, 2001, 1:55 PM MST for Coconino County, Yavapai 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 10, 2001, 1:55 PM MST (20:55 UTC)
- Expired
- Jul 10, 2001, 4:00 PM MST
- In force
- 2 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Coconino County, AZ, Yavapai County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.9 hours before the alert went out and 32 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
- 13 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1688 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS55 KFGZ 102054
FFWFGZ
AZC005-025-102345-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
155 PM MST TUE JUL 10 2001
THE NATIONAL WEATHER SERVICE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL COCONINO COUNTY IN ARIZONA
NORTHEASTERN YAVAPAI COUNTY IN ARIZONA
* UNTIL 500 PM MST
* AT 148 PM MST...AUTOMATED RAIN GAGES AND DOPPLER RADAR INDICATED
VERY HEAVY RAIN OVER SOUTH CENTRAL COCONINO COUNTY OVER AND SOUTH OF
GARLAND PRAIRIE INCLUDING UPPER SYCAMORE CANYON...OR ABOUT 18 MILES
WEST OF FLAGSTAFF. THE AREA OF HEAVY RAIN WAS NEARLY STATIONARY.
FLASH FLOODING IS LIKELY IN THE UPPER REACHES OF SYCAMORE CANYON.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
HIKERS ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO
PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING
WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.
LAT...LON 3491 11206 3488 11202 3491 11196 3491 11187
3500 11193 3510 11195 3513 11200 3509 11199
$$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 10, 9:30 AM MST, 4 hours 25 minutes earlier.
Area forecast discussion, Jul 10, 9:30 AM MST, 4 hours 25 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST TUE JUL 10 2001 .SYNOPSIS...SOUTHERLY FLOW WILL CONTINUE TO BRING TROPICAL MOISTURE NORTHWARD AND INTO NORTHERN ARIZONA. THE PATTERN OF DAILY SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER MUCH OF THE AREA THROUGH THE END OF THE WEEK. BY THE WEEKEND...A DRIER SOUTHWESTERLY FLOW WILL DEVELOP WITH THUNDERSTORM ACTIVITY CONFINED MAINLY TO THE EASTERN PORTIONS OF THE STATE. .DISCUSSION...PLUME OF MID LEVEL CLOUDS COVERS THE MIDDLE THIRD OF THE STATE FROM MEXICO NORTHWARD TO UTAH. SOME LIGHT SPRINKLES ARE ALREADY OCCURRING WITH THIS BAND OF MOISTURE. KFGZ 1200 UTC SOUNDING SHOWS A DEEP LAYER OF SATURATION BETWEEN 600 AND 400 MB. BELOW THAT THE PROFILE IS DRIER. ALTHOUGH PW IS FAIRLY HIGH THERE IS ONLY MARGINAL INSTABILITY BECAUSE OF THE DRY BOUNDARY LAYER. EXPECT TO SEE SCATTERED SHOWERS DEVELOP AGAIN TODAY BUT WITH THE CLOUD DECK THEY WILL GET A LATE START. IN ADDITION...THE MARGINAL INSTABILITY WILL LIMIT THE STRENGTH OF THESE STORMS AND POSSIBLY THE AMOUNT OF PRECIP THEY CAN DELIVER. CURRENT FORECAST HANDLES ALL THIS WELL AND NO UPDATES PLANNED ATTM. DB .FGZ...NONE.
In the hours before
Special weather statement, Jul 10, 9:30 AM MST, 4 hours 25 minutes before
AZZ004>018-037>040-101930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST TUE JUL 10 2001 ...SCATTERED THUNDERSTORMS...SOME WITH HEAVY DOWNPOURS...ACROSS NORTHERN ARIZONA TODAY... SOUTHERLY FLOW AND A DEEP PLUME OF MONSOON MOISTURE WILL REMAIN ACROSS NORTHERN ARIZONA TODAY. AS A RESULT...SCATTERED SHOWERS AND THUNDERSTORMS WILL BEGIN TO DEVELOP WITH DAYTIME HEATING. THE STRONGEST THUNDERSTORMS IN NORTHERN ARIZONA WILL DEVELOP ACROSS THE EASTERN AND CENTRAL MOUNTAINS. OWING TO THE ABUNDANT TROPICAL MOISTURE...SOME OF THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY DOWNPOURS. EXPECT STREAMS AND WASHES THAT ARE NORMALLY DRY TO FLOW WITH WATER IN ,THE VICINITY OF THESE STORMS. SPOTTER REPORTS OF EXCESSIVE RAINFALL AMOUNTS AND SEVERE WEATHER SHOULD BE RELAYED TO THE NATIONAL WEATHER SERVICE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 5:16 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 29 min |
Nearby
Flash Flood Warnings in Arizona, 2001Every flash flood warning in 2001
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.