Alert archive / Arizona / Flash Flood Warnings in 1989

Flash Flood Warning 9, NWS Phoenix, AZ

August 14, 1989Yavapai County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 14, 1989, 5:34 PM MST for Yavapai County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 14, 1989, 5:34 PM MST (00:34 UTC)
Expired
Aug 14, 1989, 8:00 PM MST
In force
2 hr
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Yavapai 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

Winslow (Autob), AZ (KINW), launched 00:00Z, 0.6 hours before the alert went out and 176 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-pSkew-T log-p diagram, Winslow (Autob), AZ at 00:00Z on 1989-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Winslow (Autob), AZ at 00:00Z on 1989-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3625 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
-44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 14, 3:50 PM MST, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
400 PM MST MON AUG 14 1989

...INTENSE LIGHTNING ALONG INTERSTATE 40 WEST OF ASH FORK...

LIGHTNING DETECTORS HAVE BEEN SHOWING AN UNUSUAL AMOUNT OF LIGHTNING IN
A THUNDERSTORM IN NORTHERN YAVAPAI COUNTY...WEST OF ASH FORK AND EAST
OF SELIGMAN. THIS MAY MEAN THE STORM IS CAUSING HEAVY RAIN AND HAIL...
ALTHOUGH IT IS NOT ALWAYS A RELIABLE INDICATOR OF STORM INTENSITY.

MOTORISTS LEAVING THE MAIN HIGHWAYS IN THE AREA SHOULD WATCH OUT FOR
FLOODING IN STREAMS AND WASHES.

OTHER THUNDERSTORMS ARE DEVELOPING OVER A LARGE PART OF ARIZONA...FROM
NORTHEAST MOHAVE AND WESTERN COCONINO COUNTIES SOUTHEAST INTO EAST
CENTRAL AND SOUTHEAST ARIZONA. CONDITIONS ARE FAVORABLE FOR SOME OF
THESE THUNDERSTORMS TO CAUSE STRONG WINDS AND HEAVY RAIN. THERE IS A
GOOD CHANCE FOR DUST STORMS IN THE DESERTS BETWEEN TUCSON AND PHOENIX
LATER THIS EVENING.

LISTEN TO THE RADIO AND TV FOR MORE UPDATES(.

TENHARKEL
Special weather statement, Aug 14, 5:30 PM MST, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
535 PM MST MON AUG 14 1989

STRONG THUNDERSTORMS ARE DEVELOPING OVER A LARGE PART OF ARIZONA...FROM
NORTHEAST MOHAVE AND WESTERN COCONINO COUNTIES SOUTHEAST INTO EAST
CENTRAL AND SOUTHEAST ARIZONA. CONDITIONS ARE FAVORABLE FOR SOME OF
THESE THUNDERSTORMS TO CAUSE STRONG WINDS AND HEAVY RAIN. THERE IS A
GOOD CHANCE FOR DUST STORMS IN THE DESERTS BETWEEN TUCSON AND PHOENIX
LATER THIS EVENING.

A SEVERE THUNDERSTORM WARNING WAS ISSUED FOR TUCSON AND EASTERN PIMA
COUNTY UNTIL 700 PM. A FLASH FLOOD WARNING HAS BEEN ISSUED FOR A SMALL
PART OF NORTHERN ARIZONA...BETWEEN SELIGMAN AND ASH FORK...UNTIL 700
PM. AND A LARGE PART OF NORTHERN ARIZONA HAS BEEN PUT IN FLASH FLOOD
WATCH STATUS UNTIL 900 PM.

CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS IN NORTH CENTRAL ARIZONA AND
THOSE IN SOUTHEAST ARIZONA TO CONVERGE TOWARD THE CENTRAL PART OF THE
STATE THIS EVENING...SO THERE IS A THREAT OF THUNDERSTORMS IN THE DESERT
AROUND PHOENIX. BUT THE ACTIVITY IS SLOW MOVING...AND IF ANY THUNDER
STORMS REACH THE METRO AREA...IT WILL PROBABLY BE WELL AFTER SUNSET.

LISTEN TO THE RADIO OR WATCH TV TO STAY POSTED ON THE LATEST WEATHER
INFORMAaTION AND POSSIBLE WARNINGS.

TENHARKEL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 5:00 PM MSTFlash Flood WarningPSRYavapai105 min

Nearby

Flash Flood Warnings in Arizona, 1989Every 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.