Alert archive / Arizona / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 3, NWS Phoenix, AZ

July 10, 1990Gila County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 10, 1990, 4:42 PM MST for Gila County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jul 10, 1990, 4:42 PM MST (23:42 UTC)
Expired: Jul 10, 1990, 6:45 PM MST
In force: 2 hr
Issued by: NWS Phoenix, AZ
Area: Whole counties

County Gila 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 12:00Z, 11.7 hours before the alert went out and 136 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: 9 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1679 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -14 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 102347
SVRPHX
AZC007-110145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
442 PM MST TUE JUL 10 1990
 
THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL  645 PM MST
FOR THE FOLLOWING LOCATIONS......
 
IN EAST CENTRAL ARIZONA
 
   ...SOUTHWESTERN GILA COUNTY ... WHICH INCLUDE THE CITY OF GLOBE.
 
 
AT 425 PM PHOENIX WEATHER RADAR DETECTED A FEW INTENSE THUNDERSTORMS
BETWEEN GLOBE/MIAMI AND LAKE ROOSEVELT ON HIGHWAY 88. THE CHARACTER OF
THESE THUNDERSTORMS ARE SUCH THAT THEY MAY CONTAIN...LARGE HAIL IN
EXCESS OF 3/4 INCHES... WIND GUSTS GREATER THAN 60 MPH... AND FLASH
FLOODING.
 
THESE THUNDERSTORMS WERE MOVING VERY SLOWING TOWARDS THE SOUTHWEST AT
10 MPH.
 
VERY LARGE THUNDERSTORMS ARE DEVELOPING ALL ACROSS SOUTHEAST ARIZONA.
A VERY ACTIVE WEATHER AFTERNOON AND EVENING IS ANTICIPATED.
RESIDENTS AND TRAVELLERS THROUGHOUT SOUTHEAST ARIZONA SHOULD REMAIN
ACUTELY ALERT TO WEATHER DEVELOPMENTS IN YOUR AREA.
 
SEVERE THUNDERSTORMS CAUSE DAMAGING WINDS...LARGE HAIL AND DEADLY
LIGHTNING. MOVE INSIDE A REINFORCED BUILDING OR STORM SHELTER. GO TO
AN INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM
WINDOWS.
 
WATCH OUT FOR FLASH FLOODING. STAY AWAY FROM STREAMS AND AVOID NARROW
STEEP WALLED CANYONS. DONT DRIVE ACROSS FLOODED STREAMS OR WASHES...
OR INTO FLOODED CITY S;TREETS OR UNDERPASSES.
 
VASQUEZ

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, Jul 10, 3:36 PM MST, 1 hour 6 minutes before

AZZALL-110000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
330 PM MST TUE JUL 10 1990

    ...THUNDERSTORMS WITH HEAVY RAIN AND HAIL IN PAYSON....

THUNDERSTORMS WITH HEAVY RAIN HAVE BEEN DEVELOPING ALONG THE MOGOLLON
AND WHITE MOUNTAINS THIS AFTERNOON.  SOME OF THESE THUNDERSTORMS
ALONG THE RIM NEAR PAYSON... SOUTHEAST TOWARDS THE TOWN OF WHITERIVER
HAVE PRODUCED VERY HEAVY DOWNPOURS.

AT 310 PM AN OBSERVER IN PAYSON REPORTED 1.15 INCHES OF RAIN IN 25
MINUTES ACCOMPANIED BY PEA TO MARBLE SIZED HAILSTONES. THERE WAS RUNOFF
IN THE NEARBY CREEKS... AS WELL AS MINOR STREET FLOODING IN PAYSON.

SCATTERED THUNDERSTORMS PRODUCING HEAVY RAINS ARE EXPECTED TO CONTINUE
TO DEVELOP THROUGHOUT THE AFTERNOON AND EVENING HOURS.  MOTORISTS
DRIVING NEAR THE BASE OF THE MOGOLLON RIM AND WHITE MOUNTAINS...
ESPECIALLY HIGHWAYS 60... 73... AND 87 SHOULD BE ALERT FOR HEAVY RAINS
IN THE VICINITY THAT MAY CAUSE WASHES AND CREEKS TO RUN ACROSS THE
ROADWAYS.

VASQUEZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 4:42 PM MST	Flash Flood Warning	PSR	Gila	2 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 1990 Every severe thunderstorm warning in 1990

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.