Alert archive / Arizona / Flash Flood Warnings in 1989

Flash Flood Warning 13, NWS Phoenix, AZ

August 16, 1989Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 16, 1989, 12:43 AM MST for Maricopa County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Aug 16, 1989, 12:43 AM MST (07:43 UTC)
Expired: Aug 16, 1989, 2:45 AM MST
In force: 2 hr
Issued by: NWS Phoenix, AZ
Area: Whole counties

County Maricopa 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, 7.7 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 329 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 2962 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPHX 160757
FFWPHX
AZC013-160945-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
1243 AM MST WED AUG 16 1989
 
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  245 AM MST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL ARIZONA
          ...EASTERN MARICOPA
 
THUNDERSTORMS ARE CONTINUING IN THE PHOENIX AREA WITH REPORTS OF 2
INCHES OR MORE IN THE PHOENIX METROPOLITAN AREA UP TO 1245 AM MST.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOqODING WHEN WATER BEGINS RISING.

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

Local storm report, Aug 15, 10:50 PM MST, 1 hour 53 minutes before

STORM REPORT...PRELIMINARY REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
1045 PM MST TUE AUG 15 1989

                                  PATH    # PERSONS  EST. DAMAGE  CHARACTER
PLACE            DATE  TIME       L   W   KILL. INJ. PROP. CROPS   OF STORM

PHOENIX           15   2216 MST            0     0    ?           TSTM W

                 POWER OUTAGES DUE TO WINDS & LIGHTNING IN VARIOUS PARTS OF
                 METRO PHOENIX AREA.

         5        SVR TSTM WARNING WAS IN EFFECT

16/0546Z SS.

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 15, 10:03 PM MST	Flash Flood Warning	PSR	Maricopa	117 min
Aug 15, 10:03 PM MST	Flash Flood Warning	PSR	Yavapai	117 min
Aug 15, 10:03 PM MST	Severe Thunderstorm Warning	PSR	Maricopa
Aug 15, 11:59 PM MST	Flash Flood Warning	PSR	Maricopa	61 min
Aug 15, 11:59 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	61 min

Nearby

Flash Flood Warnings in Arizona, 1989 Every flash flood warning in 1989

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.