Alert archive / Arizona / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 9, NWS Phoenix, AZ

July 6, 2001La Paz County, Arizona; Riverside County, California

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 6, 2001, 3:35 PM MST for La Paz County, Arizona; Riverside County, California. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 6, 2001, 3:35 PM MST (22:35 UTC)
Expired: Jul 6, 2001, 4:15 PM MST
In force: 40 min
Issued by: NWS Phoenix, AZ
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties La Paz County, AZ, Riverside County, CA

The radar

The Yuma radar (KYUX), 132 km from the middle of the area, began a volume at 22:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The text

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

000 
WUUS55 KPSR 062235
SVRPHX

AZC012-CAC065-062315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
335 PM MST FRI JUL 6 2001

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN RIVERSIDE COUNTY IN SOUTHEAST CALIFORNIA
  WEST CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA
  THE SEVERE THUNDERSTORMS INCLUDE THE CITIES OF BLYTHE...EHRENBERG  
  ...THE SOUTHERN PORTION OF THE COLORADO RIVER INDIAN RESERVATION   
  AND AREAS ALONG INTERSTATE 10 TO THE WEST OF BLYTHE ...

* UNTIL 415 PM PDT(415 PM MST)

* AT 327 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES SOUTHEAST OF BLYTHE...OR ABOUT 40 MILES
  NORTH OF MARTINEZ LAKE...MOVING NORTHWEST AT 30 MPH. THE BLYTHE    
  POLICE DEPARTMENT REPORT POWER OUTAGES AT BLYTHE ALONG WITH        
  HEAVY RAIN. 

HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS 
STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN PHOENIX.

LAT...LON 3344 11453 3351 11433 3404 11455 3395 11483

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.

NWS Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 6, 3:25 PM MST, 10 minutes earlier.

Area forecast discussion, Jul 6, 3:25 PM MST, 10 minutes before

AZZ020>028-CAZ030>033-070545-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
325 PM MST FRI JUL 6 2001

.SYNOPSIS...
HIGH PRESSURE ALOFT WILL BE POSITIONED OVER THE CENTRAL GREAT PLAINS
STATES THE NEXT FEW DAYS...MAKING THE FLOW OF AIR MORE SOUTH TO
SOUTHWEST. THIS MEANS THAT SOMEWHAT DRIER AIR IS EXPECTED TO MOVE
INTO THE FORECAST AREA THROUGH SATURDAY RESULTING IN A MINIMAL
THREAT OF THUNDERSTORMS THROUGH THE WEEKEND. THE RETURN TO A MORE
SOUTHEAST FLOW ALOFT LATER NEXT WEEK WILL TRANSLATE INTO RENEWED
CHANCES FOR THUNDERSTORMS OVER ARIZONA BY MONDAY AND TUESDAY...AND
ACROSS SOUTHEAST CALIFORNIA BY WEDNESDAY. DAYTIME TEMPERATURES WILL
ALSO RETURN TO NEAR NORMAL LEVELS BY SUNDAY OR MONDAY.

.DISCUSSION...
UPPER LEVEL VORT MAX HAS PIVOTED INTO CENTRAL ARIZONA WITH CLEARING
BEHIND IT. HOWEVER...CONVECTION RE-DEVELOPED IN FAR SRN AZ AND SE CA
DURING AFTERNOON HEATING. MAIN TSTM ACTION AT PRESS TIME OVER SE CA
ZONES...WHERE A SEVERE TSTM WARNING WAS ISSUED EARLIER. BELIEVE ONCE
SUN GOES DOWN...WE SHOULD SEE A DEFINITE DECREASE IN CLOUDS/TSTMS AS
NO GOOD TRIGGERING MECHANISM EVIDENT TO KEEP ACTION GOING. EXCEPTION
TO THIS MAY BE FAR WRN CWFA...WHERE ERN PAC VORT MAX WILL CONTINUE
TO LIFT NEWD TOWARDS SRN CA COAST NEXT 12 TO 18 HOURS. DUE TO THIS
POTENTIAL ADDED LIFT...INSERTED SLIGHT CHANCE STORMS AGAIN TOMORROW
OUT THERE...WITH LITTLE CHANCE ELSEWHERE...EXCEPT OVER HIGHER
TERRAIN OF SRN GILA COUNTY. MODELS BRING IN MUCH DRIER MID/UPPER
LEVEL AIR INTO ALL OF CWFA BY SATURDAY...AND WITH NO GOOD TRIGGER
UPCOMING AND POSSIBLE STABILIZATION FROM TODAYS ACTIVITY...DOUBT
WE WILL SEE MUCH TOMORROW. SUNDAY ALSO APPEARS TO BE A DOWNER DAY
MOST SECTIONS. THEN...LONGER RANGE AVN AND MRF GRADUALLY INCREASE
SELY FLOW AND BRING IN MORE MOISTURE...SO WE SHOULD SEE A DAY-TO-DAY
SPREAD OF DEEPER MONSOON MOISTURE AND SUBSEQUENT TSTM THREAT. WILL
PLAY IT THIS WAY IN EXTENDED. ALSO...LOOK FOR TEMPS TO REBOUND
RAPIDLY NEXT COUPLE OF DAYS WITH MUCH MORE SUNSHINE ON TAP.

FYI...LOOKS PRETTY LIKELY THAT PHX WILL BREAK ALL-TIME RECORD
LOWEST MAXIMUM TODAY...AS NO JULY 6TH HAS BEEN COOLER. OLD RECORD
WAS 92...AND SO FAR HIGH HAS BEEN 88 DEGREES RECORDED JUST AFTER
MIDNIGHT. TOO BAD THIS CANT CONTINUE THROUGH THE SUMMER!    ESTLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 2:48 PM MST	Severe Thunderstorm Warning	PSR	Riverside	42 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2001 Severe Thunderstorm Warnings in California, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.