Alert archive / Arizona / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 53, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 14, 1990, 4:35 PM MST for Pinal County, Arizona. It was in force for 115 min.
The area
The counties it named.
The facts
- Issued
- Sep 14, 1990, 4:35 PM MST (23:35 UTC)
- Expired
- Sep 14, 1990, 6:30 PM MST
- In force
- 115 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County 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 12:00Z, 11.6 hours before the alert went out and 92 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHX 142337 SVRPHX AZC021-150130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX ARIZONA 435 PM MST FRI SEP 14 1990 THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 630 PM MST FOR THE FOLLOWING LOCATIONS...... IN SOUTH CENTRAL ARIZONA ...EASTERN PINAL COUNTY... WHICH INCLUDES THE SMALL TOWNS OF HAYDEN...WINKELMAN...DUDLEYVILLE...MAMMOTH...AND ORACLE ALONG STATE HIGHWAY 77. AT 430 PM PHOENIX WEATHER RADAR DETECTED WHAT APPEARED TO BE A SEVERE THUNDERSTORM MOVING FROM THE REMOTE COUNTRY AREAS OF NORTHWEST GRAHAM COUNTY WEST TOWARDS EASTERN PINAL COUNTY. THE SEVERE THUNDERSTORM WARNING IS EFFECTIVE UNTIL 630 PM. 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. MOBILE HOMES ARE IN DANGER FROM SEVERE THUNDERSTORM WINDS... ESPECIALLY IF THEY HAVE NOT BEEN TIED DOWN. FOR YOUR SAFETY...TAKE SHELTER IN A STRONG BUILDING. IF YOUR TRAILER PARK HAS A STORM SHELTER...USE IT. W-ATCH 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 STREETS 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, Sep 14, 1:48 PM MST, 2 hours 47 minutes before
AZZ007-150300 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE YUMA AZ 150 PM MST FRI SEP 14 1990 ...THUNDERSTORMS WERE BEGINING TO DEVELOP OVER THE LOWER DESERTS... WITH HIGH HUMIDITY AND STRONG HEATING...THERE IS POTENTIAL FOR WIDELY SCATTERED STRONG THUNDERSTORM DEVELOPMENT OVER THE LOWER DESERTS THIS AFTERNOON. THE STORMS WILL BE SLOW MOVING...WITH LOCALLY HEAVY RAINS AND STRONG WINDS. BE ALERT FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOOaN INTO THE EVENING. MATHESON
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 4:35 PM MST | Flash Flood Warning | PSR | Pinal | 115 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1990Every 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.