Alert archive / Arizona / Flash Flood Warnings in 1987
Flash Flood Warning 4, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 10, 1987, 6:10 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 10, 1987, 6:10 PM MST (01:10 UTC)
- Expired
- Aug 10, 1987, 9:00 PM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 1.2 hours before the alert went out and 145 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
- 484 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1770 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 15 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 110101
FFWPHX
AZC007-013-021-110300-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
610 PM MST MON AUG 10 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 900 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN EAST CENTRAL ARIZONA
...WESTERN GILA
IN SOUTH CENTRAL ARIZONA
...EXTREME EASTERN MARICOPA AND NORTHEAST PINAL
VERY HEAVY SLOW MOVING THUNDERSTORMS ARE LOCATED IN THE MOUNTAINOUS
AREAS BETWEEN PAYSON AND MIAMI AND GLOBE. SEVERAL REPORTS OF VERY
HEAVY RAIN ON THE ORDER OF 1.50 INCHES PER HOUR HAVE BEEN REPORTED
WITH THESE CELLS.
VERY HEAVY RAIN WAS REPORTED IN THE TOWN OF CLAYPOOL NEAR MIAMI AND
SOME FLOODING OF STREAMS AND WASHES HAS BEEN REPORTED. THESE
THUNDERSTORMS WERE MOVING SOUTHWEST ABOUT 10 MPH AND WILL LIKELY
EFFECT SOME OF THE DEEP CANYON AREAS FROM SUPERIOR TO HAYDEN.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS FLOODED WASHES...DIPS...OR LOW SPOTS. NEVER TRY
TO CROSS A RUNNING WASH OR A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING W\ATER MOVE UP TO HIGHER GROUND.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.
In the hours before
Special weather statement, Aug 10, 4:45 PM MST, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
445 PM MST MON AUG 10 1987
...HEAVY THUNDERSTORMS OVER THE MOGOLLON RIM MOVING SOUTHWEST
TOWARDS ROOSEVELT LAKE...
AT 430 PM PHOENIX WEATHER RADAR DETECTED SEVERAL HEAVY THUNDERSTORMS
OVER THE MOUNTAINOUS AREAS SOUTHEAST OF PAYSON. THESE THUNDERSTORMS
ARE MOVING SOUTHWESTWARD ABOUT 15 MPH AND SHOULD IMPACT THE ROOSEVELT
LAKE RECREASIONAL AREA ABOUT BETWEEN 530 AND 6PM.
BOATERS AND OTHER RECREATIONALISTS AROUND THE LAKE AREA ARE ENCOURAGED
TO PREPARE FOR THE POSSIBILITY OF STRONG GUSTY WINDS...HEAVY RAIN
AND FREQUENT DANGEROUS LIGHTNING.
THESE STORMS...AS THEY CONTINUE TO PROPAGATE SOUTHWESTWARD...COULD
I MPACT THE EAST VALLEY AREAS OF THE PHOENIX METRO AREA AT ABOUT
730 PM.
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Flash Flood Warnings in Arizona, 1987Every flash flood warning in 1987
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.