Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 3, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 14, 1999, 4:07 PM MST for Maricopa County, Arizona. It was in force for 93 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, 4:07 PM MST (23:07 UTC)
- Expired
- Jul 14, 1999, 5:40 PM MST
- In force
- 93 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 11.1 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
- 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
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHX 142307 FFWPHX AZC013-150040- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 407 PM MST WED JUL 14 1999 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 540 PM MST * AT 405 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN CENTRAL AND EASTERN GREATER PHOENIX AREA... MOVING EAST AT 20 MPH. * INDIAN BEND WASH IS PARTICULARLY PRONE TO FLASH FLOODING WITH THESE STORMS. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! 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 14, 2:45 PM MST, 1 hour 22 minutes earlier.
Area forecast discussion, Jul 14, 2:45 PM MST, 1 hour 22 minutes before
SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST WED JUL 14 1999 .SYNOPSIS... A MOIST AIRMASS IS MOVING SLOWLY EAST ACROSS SOUTH CENTRAL AZ TONIGHT. A BROAD TROUGH OF LOW PRESSURE MOVES TO THE EAST TONIGHT TRIGGERING SCATTERED THUNDERSTORMS WITH HEAVY RAINFALL IN SOUTH CENTRAL AZ. A SOUTHWEST FLOW ALOFT ON THURSDAY WILL BRING SLIGHTLY DRIER AIR INTO THE SOUTHWEST AND SOUTH CENTRAL AREA. CHANCE OF AFTERNOON THUNDERTORMS CONTINUES MAINLY TO THE EAST ON FRIDAY AND INTO THE WEEKEND. .DISCUSSION... DEEP CONVECTION OVER SOUTH CENTRAL MIDDAY TODAY HAS TEMPORAIRLY DIMINISHIED THUNDERTORMS LATE THIS AFTERNOON. HOWEVER THE STRONG THUNDERSTORMS SHOULD RETURN THIS EVENING...TRIGGERING ON THE OLD OUTFLOW BOUNDAIRIES FROM THE PREVIOUS STORMS...A MOVE NORTHEAST ACROSS THE SAME AREAS THAT HAD RAINS EARLIER TODAY. THE SUBTLE AXIS OF A BROAD TROUGH ALOFT SHOULD SWING TO THE EAST OF SOUTH CENTRAL AZ BY 06Z TONIGHT. AFTER THE AXIS PASSAGE CNVCTV ACTIVITY SHOULD DMSH. A WEAK RDIGE FOLLOWS...INTO OUR AREA ON THURSDAY...THEN A E PAC TROUGH DEEPENS SW OF SRN CA...ON FRIDAY BRINGING A BETTER DEFINED SOUTHWEST FLOW INTO THE AREA. THE E PAC TROUGH SHD BE THE DOMINATE FEATURE THOUGH THE WEEKEND. PERHAPS HEARLDING A SLIGHTLY DRIER CLIME IN THE SOUTHWEST REGION OF OUR AREA GOING INTO EARLY NEXT WEEK. IN THE MEANTIME...A FLASH FLOOD WATCH WILL BE IN EFFECT UNTIL 11 PM MST FOR CENTRAL AZ...MARICOPA...SOUTHERN GILA...AND NORTHWEST PINAL COUNTY.
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:03 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| 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, 4:24 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.