Alert archive / Arizona / Flash Flood Warnings in 2000
Flash Flood Warning 12, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 27, 2000, 11:06 AM MST for Maricopa County, Arizona. It was in force for 54 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 27, 2000, 11:06 AM MST (18:06 UTC)
- Expired
- Aug 27, 2000, 12:00 PM MST
- In force
- 54 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 6.1 hours before the alert went out and 49 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
- 136 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 2265 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 49 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 271805 FFWPSR AZC013-272000- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 1106 AM MST SUN AUG 27 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHWESTERN MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 100 PM MST * NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED LOCALLY HEAVY THUNDERSTORMS IN NORTHWEST MARICOPA COUNTY...MOVING TO THE NORTHWEST AT 5 TO 10 MPH. THE MOST AFFECTED AREAS FOR FLASH FLOODING IS WEST OF HIGHWAY 60 FROM WITTMANN TO WICKENBURG THEN WEST IN THE VICINITY OF HIGHWAY 60 ACROSS THE NORTHERN AND CENTRAL PORTIONS OF NORTHWEST MARICOPA COUNTY. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! DKS
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 Aug 27, 10:00 AM MST, 1 hour 6 minutes earlier.
Area forecast discussion, Aug 27, 10:00 AM MST, 1 hour 6 minutes before
AZZ020>028-CAZ030>033-272245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 10 AM MST SUN AUG 27 2000 .SYNOPSIS... A MOIST SOUTH TO SOUTHEAST FLOW OF AIR WILL CONTINUE ACROSS SOUTHWEST ARIZONA AND FAR SOUTHEAST CALIFORNIA THE NEXT COUPLE OF DAYS. HIGH PRESSURE ALOFT CENTERED TO THE EAST OF ARIZONA WILL KEEP THIS FLOW IN PLACE. AN UPPER LEVEL DISTURBANCE WILL MOVE INTO THE REGION ON MONDAY FOR SOME ENHANCEMENT OF THUNDERSTORM ACTIVITY BY THEN. MEANWHILE... A STRONG UPPER LEVEL LOW PRESSURE AREA WILL BE DEVELOPING THE NEXT SEVERAL DAYS OFF THE WEST COAST. THIS WILL EVENTUALLY BRING A STRONG DRYING TREND TO ALL OF THE FORECAST AREA BY THE END OF THIS WEEK. .DISCUSSION... THUNDERSTORM ACTIVITY IN OUR CWA WHICH BEGAN BETWEEN 3 AND 4 AM IS STILL ONGOING...MAINLY OVER AZ ZONES. ODDLY ENOUGH...IT DEVELOPED RIGHT OVER OUR CWA INSTEAD OF ADVECTING IN FROM ELSEWHERE. DIFFICULT TO SEE A CAUSATIVE MECHANISM IN THE SATELLITE DATA. IN THE 12Z PLOT DATA...THERE IS LITTLE IF ANY SPEED DIVERGENCE OR DIFFLUENCE AT 300 AND 250 MB. MID LEVEL TEMPS ARE MODESTLY COOL YET NO COOLER THAN YESTERDAY. BUT...AT 500 MB A WAVE IS APPARENT OVER SOUTHERN ARIZONA. ITS ROTATING AROUND THE HIGH CENTERED OVER THE SOUTHERN PLAINS. 24 HR RAOB TRENDS IN AND AROUND ARIZONA SHOW THE WIND FIELDS HAVE BACKED...MOST LIKELY DUE TO THIS DISTURBANCE. OTHERWISE THE TEMPERATURE PROFILES HAVENT CHANGED MUCH...EXCEPT FOR SOME SLIGHT COOLING...MAINLY IN THE LOW LEVELS. MOISTURE PROFILES HAVE CHANGED...ESPECIALLY AT FGZ WHICH HAD A SUBSTANTIAL INCREASE. TUS INCREASE DUE MOSTLY TO MID CLOUDS. YUM HAD MOISTURE INCREASE BETWEEN 850 AND 600 MB...BUT DRYING BELOW 850 MB. MODELS SLOWLY MOVE THE WAVE NORTH-NORTHWESTWARD TODAY AND TONIGHT. ETA HOWEVER BRINGS ANOTHER ONE RIGHT ON ITS HEELS FOR MONDAY AND CONTINUES THE STREAM FOR TUESDAY. AVN WAITS UNTIL MONDAY NIGHT/TUESDAY BEFORE BRINGING ANOTHER DISTURBANCE THROUGH. IT APPEARS THAT THE MODELS ARE TRYING TO STRIP ENERGY OFF OF THE CYCLONIC CIRCULATION ALONG BAJA AS THE EASTERN PACIFIC UPPER LOW NUDGES EASTWARD...IN EFFECT PULLING IT BIT BY BIT INTO THE SOUTHWESTERLY FLOW. MEAN RH PROGS INDICATE THAT MOISTURE WILL BE AROUND THROUGH TUESDAY NIGHT. THUS COULD BE QUITE ACTIVE NEXT 72 HOURS. JAMISON
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 5:30 PM MST | Flash Flood Warning | PSR | Gila | 60 min |
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.