Alert archive / Arizona / Flash Flood Warnings in 2000
Flash Flood Warning 19, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Oct 22, 2000, 6:38 AM MST for La Paz County, Arizona. It was in force for 4 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
- Oct 22, 2000, 6:38 AM MST (13:38 UTC)
- Expired
- Oct 22, 2000, 11:00 AM MST
- In force
- 4 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County La Paz County, AZ
The radar
The Yuma radar (KYUX), 151 km from the middle of the area, began a volume at 13:40 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
Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 1.6 hours before the alert went out and 133 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
- 1172 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -89 m²/s²
- 0-3 km storm-relative helicity
- 97 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 KPSR 221338 FFWPSR AZC012-221825- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 638 AM MST SUN OCT 22 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... THE TOWN OF WENDEN IN SOUTHEAST LA PAZ COUNTY IN WEST CENTRAL ARIZONA... * UNTIL 1200 PM MST * AT 630 AM...CENTENNIAL WASH THROUGH THE TOWN OF WENDEN CONTINUES TO OVERFLOW...SPREADING ABOUT A FOOT OF WATER ACROSS THE SOUTHERN AND EASTERN PARTS OF TOWN. HOME EVACUATIONS WERE IN PROGRESS AT 615 AM... WITH MORE RAIN AND FLOODING EXPECTED THROUGHOUT THE MORNING HOURS. THE FLASH FLOOD WARNING FOR THE TOWN OF WENDEN... AND ADJACENT AREAS NEAR THE CENTENNIAL WASH...IS IN EFFECT UNTIL NOON TODAY. A LOW PRESSURE SYSTEM HAS STALLED OVER ARIZONA RESULTING IN A THREAT FOR LOCALLY HEAVY RAIN THROUGHOUT THE DAY. * DON'T DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. HV
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 Phoenix, AZ wrote its last area forecast discussion before this flash flood warning went out at Oct 22, 2:45 AM MST, 3 hours 53 minutes earlier.
Area forecast discussion, Oct 22, 2:45 AM MST, 3 hours 53 minutes before
AZZ020>028-CAZ030>033-221745- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 245 AM MST SUN OCT 22 2000 .SYNOPSIS... A STRONG PACIFIC LOW PRESSURE SYSTEM WILL REMAIN STATIONARY NEAR YUMA...SPREADING SHOWERS AND OR PERIODS OF RAIN...WITH THUNDERSTORMS ...OVER SOUTHWEST AND SOUTH CENTRAL ARIZONA THROUGH MONDAY. SOME HEAVY RAIN IS POSSIBLE. THE LOW PRESSURE SYSTEM IS EXPECTED TO MOVE NORTHEAST OUT OF THE AREA EARLY TUESDAY...WITH SHOWERS ENDING. PARTLY CLOUDY SKIES AND WARMER WEATHER WILL RETURN WEDNESDAY AND THURSDAY. .DISCUSSION... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS CONTINUED TO DEVELOP OVER A LARGE PART OF SOUTHWEST AND SOUTH CENTRAL AZ AT 09Z. THIS IN RESPONSE TO A STRONG UPPER LOW THAT HAS TURNED NEGATIVE TILT AND DIFLUENT OVER THE REGION...WITH DYNAMICS INCREASING THIS MORNING. THE 500 MB LOW CENTER WAS LOCATED ABOUT 100 MILES SOUTH SOUTHWEST OF YUMA AT 09Z. EQUALLY IMPRESSIVE WAS THE DEEP/EXTENSIVE STRATUS FIELD ALONG THE ENTIRE WEST COAST OF BAJA...FEEDING INLAND INTO NORTHWEST MEXICO ...AND INTO THE UPPER LOW CIRCULATION. IN OTHER WORDS... BOOKOOO MOISTURE WILL ADVECT AND CONVERGE OVER A LARGE PART OF SOUTHWEST AND SOUTH CENTRAL AZ THROUGH MONDAY...CONTINUING THE THREAT FOR HEAVY RAIN. BOTH ETA AND AVN MODELS WERE INITIALIZED FAIRLY WELL... AND BOTH FORECASTS ARE NEARLY IDENTICAL FOR MUCH OF AZ THROUGH MONDAY AFTERNOON. THEREFORE... PICK A MODEL AND YOU'LL BE DOING OK. MODELS CONTINUE THE NEGATIVE TILT DIFLUENT ORIENTATION OF THE TROF THROUGH THIS EVENING (WITH THE H5 LOW CENTER JUST SOUTH OF YUMA)... WITH CONSIDERABLE DYNAMICS FORECAST OVER MUCH OF SOUTHWEST AND SOUTH CENTRAL AZ. THE UPPER LOW BECOMES BAROTROPIC TONIGHT AS ITS CENTER MOVES INTO SOUTHWEST AZ...WITH SHOWERS BECOMING MORE INSTABILITY THAN DYNAMICALLY DRIVEN ON MONDAY. IN THE EXTENDED FORECAST... PERHAPS A FEW LINGERING SHOWERS ARE POSSIBLE OVER SOUTH CENTRAL AZ TUESDAY MORNING... OTHERWISE MORE STABLE WEATHER DEVELOPS WITH HEIGHT RISES BEHIND THE EASTWARD MOVING UPPER LOW. VASQUEZ
In the hours before
Local storm report, Oct 22, 1:25 AM MST, 5 hours 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX, AZ
125 AM MST SUN OCT 22 2000
TIME(MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
400 PM YUMA AZ WIND DAMAGE
10/21/00 YUMA TREES DOWN POWER OUTAGES
930 WICKENBURG AZ FLASH FLOOD
10/21/00 MARICOPA WASHES RUNNING AND OVER
BANKS. SOME HOMES FLOODED
AREAS EVACUATED
NNNNThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 21, 8:21 PM MST | Flash Flood Warning | PSR | Maricopa | 99 min |
| Oct 21, 11:00 PM MST | Flash Flood Warning | PSR | Maricopa | 60 min |
| Oct 22, 1:07 AM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Oct 22, 3:01 AM MST | Flash Flood Warning | PSR | La Paz | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2000Every flash flood warning in 2000
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.