Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 2, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 13, 1999, 7:03 PM MST for Maricopa County, Arizona. It was in force for 3 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
- Jul 13, 1999, 7:03 PM MST (02:03 UTC)
- Expired
- Jul 13, 1999, 10:00 PM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 2.1 hours before the alert went out and 198 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
- 117 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2701 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 148 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 KPHX 140203 FFWPHX AZC013-140500- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 703 PM MST TUE JUL 13 1999 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 1000 PM MST * AT 7 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN REDEVELOPING FROM THE VICINITY OF LAKE PLEASANT NORTHWARD WITH LITTLE MOVEMENT. * THESE THUNDERSTORMS ARE PRODUCING VERY HEAVY RAIN WHICH WILL CAUSE FLOODING OF THE AGUA FRIA RIVER AND ITS TRIBUTARIES FLOWING INTO LAKE PLEASANT. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! DO NOT >CAMP NEAR STREAMS. CRAIG ELLIS
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 Jul 13, 2:50 PM MST, 4 hours 13 minutes earlier.
Area forecast discussion, Jul 13, 2:50 PM MST, 4 hours 13 minutes before
SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 250 PM MST TUE JUL 13 1999 .SYNOPSIS... A VERY MOIST AIR MASS WILL CONTINUE OVER THE FORECAST AREA THROUGH WEDNESDAY. AT THE SAME TIME...AN UPPER LEVEL DISTURBANCE ALONG THE LOWER COLORADO RIVER VALLEY WILL SERVE TO LIFT THIS MOISTURE INTO LOCALIZED HEAVY RAIN PRODUCING THUNDERSTORMS THIS EVENING. ON WEDNESDAY...THERE COULD BE ADDITIONAL STRONG THUNDERSTORMS AS THE UPPER DISTURBANCE APPROACHES...WITH SOME VERY STRONG AND GUSTY WINDS POSSIBLE. MEANWHILE...A STRONG PACIFIC LOW PRESSURE AREA WILL PUSH THE HIGH PRESSURE RIDGE CURRENTLY OVER THE AREA TO THE SOUTHEAST. THIS WILL EVENTUALLY PUT SOUTHWEST ARIZONA AND SOUTHEAST CALIFORNIA UNDER A DRIER WEST SOUTHWESTERLY WIND FLOW BY THE END OF THE WEEK. SO...FEWER THUNDERSTORMS ARE EXPECTED BY THE WEEKEND. .DISCUSSION... THUNDERSTORMS FIRING TODAY OVER CWFA A LITTLE LATER THAN YESTERDAY AS IT HAS TAKEN AWHILE FOR AIR MASS TO RECOVER FROM OVERNIGHT STORMS. BUT...CONVECTION IS NOW UNDERWAY MOSTLY OVER HIGHER TERRAIN OF FAR ERN CWFA RIGHT NOW. SHOULD STILL SEE SOME DRENCHING THUNDERSTORMS DEVELOP OVER THE LOWER SOUTHWEST AZ AND SE CA DESERTS YET THIS AFTERNOON IN SOUPY...UNSTABLE AIR MASS. VORT TROF ALONG CO RIVER SHOULD HELP TO ACT AS TRIGGER...SO MAY SEE ACTION GO WAY INTO THE NIGHT. ON WED...THIS VORT TROF BEGINS TO KICK THROUGH THE STATE IN RESPONSE TO DIGGING PAC NW TROF...AND LOW/MID LEVEL SHEAR INCREASES. SO...COULD ACTUALLY SEE SOME SEVERE MULTICELLS DURING MAX HEATING TIME WED. BY THU...MODELS SUGGEST SOME DRYING/STABLIZING OVER WRN CWFA...SO WILL TAKE STORMS OUT THIS AREA...LEAVE AT LEAST SLIGHT CHANCE ERN PORTIONS. MRF FROM LAST NIGHT SUGGESTING THAT SWLY FLOW WILL EVENTUALLY BECOME QUITE DRY...SO WILL GAMBLE AND TAKE OUT STORMS FROM ENTIRE CWFA FORECAST ON SATURDAY/SUNDAY. PLEASE CHECK LATEST FLASH FLOOD STATEMENTS REGARDING CURRENT FLASH FLOOD WATCH...WHICH HAS BEEN EXPANDED TO COVER ENTIRE CWFA TIL 06Z. ESTLE
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 1:23 PM MST | Severe Thunderstorm Warning | PSR | Gila | 62 min |
| Jul 14, 3:25 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 60 min |
| Jul 14, 3:47 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 48 min |
| Jul 14, 4:07 PM MST | Flash Flood Warning | PSR | Maricopa | 93 min |
| Jul 14, 4:24 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 46 min |
| Jul 14, 4:38 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 37 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.