Alert archive / Arizona / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 13, NWS Phoenix, AZ

August 8, 1986Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 8, 1986, 7:00 PM MST for Maricopa County, Arizona. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1986, 7:00 PM MST (02:00 UTC)
Expired
Aug 8, 1986, 8:00 PM MST
In force
60 min
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, 2.0 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-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 1986-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 280 joules per kilogram.LCLLFCEL10008507005003002001001 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, Tuscon, AZ at 00:00Z on 1986-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939Sfc1 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
280 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2467 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
79 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 severe thunderstorm 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 8, 2:42 PM MST, 4 hours 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
245 PM MST FRI AUG 8 1986

...HEAVY THUNDERSTORM EAST OF PRESCOTT..

RADAR AND SATELLITE PICTURES INDICATE A VERY HEAVY THUNDERSTORM NEAR
DEWEY 15 MILES EAST OF PRESCOTT. AN AUTOMATIC RAIN GAUGE 5 MILES EAST
OF DEWEY HAS RECORDED NEARLY .30 OF AN INCH IN 30 MINUTES.

THIS THUNDERSTORM HAS SHOWN LITTLE MOVEMENT OVER THE PAST HOUR AND
LOCAL FLOODING IS POSSIBLE IN SMALL TRIBUTARIES RUNNING INTO THE
AGUA FRIA RIVER. PERSONS IN THAT AREA SHOULD USE CAUTION.

A LARGE LINE OF THUNDERSTORMS HAS DEVELOPED ALONG THE MOGOLLON RIM
THIS AFTERNOON AND THEY ARE EXPECTED TO GRADUALLY DEVELOP TOWARD
THE PHOENIX AREA LATE THIS AFTERNOON AND EVENING. LOCALLY HEAVY
RAIN IS POSSIBLE FROM THESE THUNDERSTORMS AND PERSONS SHOULD BE
ALERT TO HEAVY RAIN..DANGEROUS LIGHTNING AND DAMAGING WINDS.

FURTHER STATEMENTS WILL BE ISSUED AS THESE THUNDERSTORMS DEVELOP.

HOFFMANN
Special weather statement, Aug 8, 4:35 PM MST, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
430 PM MST FRI AUG 8 1986

...THUNDERSTORMS MOVING OUT OF CENTRAL MOUNTAINS TOWARD DESERTS...

RADAR AND SATELLITE PICTURES AT 4 PM SHOWED A BROKEN LINE OF MODERATE
TO HEAVY THUNDERSTORMS EXTENDING FROM THE MOUNTAINS NORTHWEST OF
PRESCOTT.. SOUTHEASTWARD TO GRAHAM COUNTY IN SOUTHEAST ARIZONA. THE
INDIVIDUAL STORM CELLS WERE MOVING A LITTLE SOUTH OF DUE WEST AT
ABOUT 10 TO 15 MPH.

AROUND 430 PM.. SOME OF THE STRONGER CELLS WERE.. NEAR IRON SPRINGS
WEST OF PRESCOTT.. OVER THE RIM NEAR STRAWBERRY.. IN THE TONTO BASIN
NEAR JAKES CORNER.. OVER THE MOUNTAINS NORTH OF GLOBE AND EAST OF
LAKE ROOSEVELT.. AND OVER THE WEST END OF MOUNT GRAHAM. ALL OF THESE
STORMS CONTAINED MODERATE TO HEAVY RAIN AND PROBABLY SOME STRONG
WINDS AS WELL. BOATERS AND SWIMMERS ON THE SALT.. VERDE LAKES SHOULD
HEAD FOR SHORE IF THREATENING WEATHER APPROACHES.

AT THE PRESENT RATE OF MOVEMENT.. THE LINE OBF THUNDERSTORMS SHOULD
REACH THE NORTHERN AND EASTERN EDGES OF THE PHOENIX METRO AREA
SOMETIME BETWEEN 7 AND 8 PM. EXPECT SOME GUSTY WINDS AND BLOWING
DUST.. FOLLOWED BY A CHANCE FOR THUNDERSTORMS.

TENHARKEL
Special weather statement, Aug 8, 6:10 PM MST, 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
600 PM MST FRI AUG 8 1986

...STRONG THUNDERSTORMS NEAR PAYSON AND OVER THE SALT RIVER LAKES...

AT 6 PM .. PHOENIX RADAR SPOTTED A STRONG THUNDERSTORM CENTERED
ABOUT 10 MILES WEST OF PAYSON.. AND ANOTHER NEAR CANYON LAKE.. NORTH
OF THE SUPERSTITION MOUNTAINS.

AN OBSERVER AT PAYSON REPORTED INTENSE LIGHTNING AND HEAVY RAIN AT
6 PM. EARLIER.. SOME SMALL HAIL WAS REPORTED AT STRAWBERRY.. ABOUT 10
MILES NORTHWEST OF PAYSON. NO REPORTS WERE AVAILABLE FROM THE SALT
RIVER LAKES.. BUT RADAR INDICATED THAT STORM WAS NOT QUITE AS STRONG
AS THE ONE WEST OF PAYSON.

BOTH STORMS ARE MOVING TOWARD THE WEST AND SOUTHWEST. THE PAYSON
STORM COULD THREATEN THE VERDE LAKES.. BARTLETT AND HORSESHOE.. IN
THE NEXT HOUR. BOATERS AND SWIMMERS SHOULD HEAD FOR SHORE AND FIND
SHELTER.

THESE THUNDERSTORMS ARE PART OF A LINE THAT HAS BEEN MOVING OFF THE
MOUNTAINS TOWARD THE DESERTS. IT IS STILL EXPECTED TO BRING STRONG
WINDS AND BLOWING DUST TO THE PHOENIX METRO AREA LATER THIS EVENING
..PROBABLY BETWEEN 7 AND 8 PM. AND OF COURSE THE DUST MAY BE
FOLLOWED BY A THUNDERSTORM.

TENHARKEL

Nearby

Severe Thunderstorm Warnings in Arizona, 1986Every severe thunderstorm warning in 1986

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.