Alert archive / Arizona / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 36, NWS Phoenix, AZ

August 15, 2001Gila County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 15, 2001, 6:42 PM MST for Gila County, Arizona. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 15, 2001, 6:42 PM MST (01:42 UTC)
Expired
Aug 15, 2001, 7:15 PM MST
In force
33 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Gila County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 1.7 hours before the alert went out and 181 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 2001-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1307 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 2001-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 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
1307 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
2414 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
17 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.

601 
WUUS55 KPSR 160143
SVRPHX
AZC007-160215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
642 PM MST WED AUG 15 2001

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL GILA COUNTY IN EAST CENTRAL ARIZONA...
  INCLUDING THE ROOSEVELT LAKE AREA

* UNTIL 715 PM MST

* AT 633 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES NORTHWEST OF ROOSEVELT...MOVING SOUTH
  AT 10 MPH.

DAMAGING MICROBURST WINDS ARE LIKELY WITH THIS STORM. VERY HEAVY RAIN
IS ALSO POSSIBLE. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM
PASSES.

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.

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

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 Aug 15, 3:45 PM MST, 2 hours 57 minutes earlier.

Area forecast discussion, Aug 15, 3:45 PM MST, 2 hours 57 minutes before
AZZ020>028-CAZ030>033-160545-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
345 PM MST WED AUG 15 2001

.SYNOPSIS...
A RIDGE OF HIGH PRESSURE CENTERED ALONG THE WEST COAST WILL MIGRATE
EASTWARD FOR WARMER TEMPERATURES AND DRYER CONDITIONS THE NEXT FEW
DAYS. AS THE HIGH BECOMES CENTERED NEAR EASTERN ARIZONA SUNDAY...A
MORE EASTERLY FLOW WILL BEGIN TO SPREAD MOISTURE WESTWARD ACROSS
SOUTHERN ARIZONA....FOR A RENEWED CHANCE OF STORMS EARLY NEXT
WEEK...WITH SOUTHEAST CALIFORNIA EXPECTED TO REMAIN DRY.

.DISCUSSION...
MUCH QUIETER THIS AFTERNOON COMPARED TO YESTERDAY. STORMS TO THE
NORTH OF OUR CWA ARE STRUGGLING TO SUSTAIN THEMSELVES OFF THE HIGHER
TERRAN. MUCH LOWER STORM THREAT THIS EVENING THAN LAST EVENING AND
ZONES REFLECT THIS. DOWNWARD TREND CONTINUES TOMORROW AS WE HEAD
INTO A TEMPORARY BREAK IN THE MONSOON FOR OUR CWA. AS TEMPS GO
UP...DEW POINTS COME DOWN. OVER THE WEEKEND...THE RIDGE AXIS OVER
THE WEST COAST STATES SHIFTS INTO THE PLAINS. MID LEVEL
SOUTHEASTERLY FLOW BEGINS SUNDAY FOR A RETURN OF THE STORM THREAT
FOR THE FAR EASTERN CWA. WITH TIME...MOISTURE SHOULD ADVANCE
WESTWARD. HOWEVER...THE WESTERN CWA IS ANTICIPATED TO REMAIN DRY AS
TROUGHS MOVE THROUGH THE PACIFIC NORTHWEST. MODELS HAVE BEEN
WAVERING ON HOW MUCH SOUTHWESTERLY FLOW WILL AFFECT OUR CWA. THE MRF
SHOWS IT AFFECTING THE WHOLE CWA BY END OF EXTENDED. THE AVN THOUGH
APPEARS TO BACK OFF ON THE INTRUSION OF THE WESTERLIES. ECMWF
SUPPORTS THIS AS WELL. SO FOR THE ARIZONA PORTION OF THE
CWA...EXCEPT LOWER COLORADO RIVER VALLEY...DECIDED TO MAINTAIN STORM
CHANCE THROUGH THE EXTENDED. IN THE WESTERN ZONES THOUGH I MENTION
SOME MODEST COOLING AT THE END OF THE EXTENDED.

JAMISON

In the hours before

Special weather statement, Aug 15, 12:55 PM MST, 5 hours 47 minutes before
AZZ020>028-160200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1255 PM MST WED AUG 15 2001

...HAZARDOUS WEATHER POSSIBLE OVER SOUTH-CENTRAL AND SOUTHWEST
ARIZONA LATE THIS AFTERNOON AND EVENING...

COUNTIES IN THE RISK AREA INCLUDE:
     IN ARIZONA...LA PAZ...YUMA...MARICOPA...NORTHWEST PINAL AND
                  SOUTHERN GILA.

THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
     STRONG GUSTY WINDS AND LOCALIZED HEAVY RAIN.

LIGHTNING IS ALSO A HAZARD AND IS INHERENT WITH ALL THUNDERSTORMS.

STORM SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND
TONIGHT.

JAMISON

Nearby

Severe Thunderstorm Warnings in Arizona, 2001Every 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; the sounding from the Mesonet's radiosonde archive.