Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 36, NWS Phoenix, AZ
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.
- 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
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.
JAMISONNearby
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.