Alert archive / Arizona / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 46, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 6, 2002, 4:17 PM MST for Gila County, Arizona. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2002, 4:17 PM MST (23:17 UTC)
- Expired
- Sep 6, 2002, 5:15 PM MST
- In force
- 58 min
- Issued by
- NWS Phoenix, AZ
- Area
- Counties, with a storm outline in the text
County Gila County, AZ
The radar
The Phoenix radar (KIWA), 63 km from the middle of the area, began a volume at 23:21 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 11.3 hours before the alert went out and 78 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
- 907 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 2318 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
169
WUUS55 KPSR 062317
SVRPSR
AZC007-070015-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
415 PM MST FRI SEP 6 2002
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL GILA COUNTY IN EAST CENTRAL ARIZONA
* UNTIL 515 PM MST
* AT 406 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF ROOSEVELT...MOVING
NORTHEAST AT 25 MPH.
THIS STORM WILL AFFECT THE ROOSEVELT LAKE AREA AROUND 430 PM.
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 3369 11131 3363 11125 3369 11116 3344 11101
3373 11090 3396 11138What 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 Sep 6, 3:25 PM MST, 52 minutes earlier.
Area forecast discussion, Sep 6, 3:25 PM MST, 52 minutes before
AZZ020>028-CAZ030>033-070545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 325 PM MST FRI SEP 6 2002 .SYNOPSIS... A MOIST AIRMASS WILL STAY IN PLACE ACROSS ALL OF ARIZONA AND SOUTHEAST CALIFORNIA THROUGH THE WEEKEND AND INTO EARLY NEXT AS LOW PRESSURE ALOFT REMAINS JUST OFF THE WEST COAST. WEAK IMPULSES WILL MOVE ACROSS THE FORECAST AREA FROM TIME TO TIME AND WILL SERVE TO TRIGGER SHOWERS AND THUNDERSTORMS INTO MONDAY. DRIER AIR WILL MOVE INTO SOUTHEAST CALIFORNIA EARLY NEXT WEEK...WITH A MOIST SOUTHERLY FLOW EXPECTED TO CONTINUE OVER SOUTH-CENTRAL ARIZONA THROUGH ABOUT MIDWEEK. TEMPERATURES WILL FALL OFF TO NEAR SEASONAL NORMALS THE NEXT FEW DAYS. .DISCUSSION... CONVECTION FIRING NICELY TODAY...MAINLY OVER ERN THIRD OF CWFA. LOTS OF BOUNDARY INTERACTIONS COMMENCING...AND THESE SHOULD KEEP STORMS FIRING WELL INTO THE NIGHT. SW AZ AND SE CA RATHER QUIET AT THIS TIME...BUT EXPECT STORMS TO BEGIN GINNING UP THESE AREAS AS WELL WITH VERY MOIST/UNSTABLE AIR IN PLACE CWFA-WIDE. SYNOPTICALLY... UPPER LOW OFF W COAST WILL LIFT OUT IN PIECES OVER THE WEEKEND WITH A SIGNIFICANT HANG-BACK LOW EXPECTED TO BE LEFT BEHIND OFF SRN CA COAST. POSITION OF TROUGH WILL PRODUCE A PROLONGED NE/SW ORIENTED JET TO OUR NW LEAVING MOST OF FORECAST AREA IN FAVORABLE RIGHT ENTRANCE REGION FROM LATE SAT NIGHT INTO EARLY MONDAY. SECONDARY LOW FORMING OFF THE SRN CA COST WILL HELP TO KEEP MOISTURE IN PLACE OVER AZ PORTION OF CWFA WELL INTO NEXT WEEK...SO WILL KEEP STORM CHANCES GOING MAINLY CENTRAL/ERN PORTIONS THRU MIDWEEK...AND HIGHER TERRAIN ZONE 24 RIGHT ON THRU FRIDAY. TEMPS EXPECTED TO SETTLE DOWN NEAR OR SLIGHTLY BELOW SEASONAL NORMALS. ESTLE .PSR...NONE.
In the hours before
Special weather statement, Sep 6, 1:09 PM MST, 3 hours 8 minutes before
AZZ020>028-CAZ030>033-070700- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 109 PM MST FRI SEP 6 2002 ...A RISK OF STRONG THUNDERSTORMS AND HAZARDOUS WEATHER OVER ALL OF SOUTH-CENTRAL AND SOUTHWEST ARIZONA...AS WELL AS SOUTHEAST CALIFORNIA DESERTS THIS AFTERNOON AND EVENING... THE OUTLOOK AREA CONSISTS OF THE FOLLOWING COUNTIES... MARICOPA...NORTHERN PINAL...SOUTHERN GILA...LA PAZ AND YUMA IN ARIZONA...AND IMPERIAL AND EASTERN RIVERSIDE COUNTIES IN SOUTHEAST CALIFORNIA. CITIES AND TOWNS IN THE OUTLOOK AREA INCLUDE...THE GREATER PHOENIX METROPOLITAN AREA...CASA GRANDE...FLORENCE... COOLIDGE...GLOBE...MIAMI...SUPERIOR...GILA BEND...WENDEN...PARKER ...QUARTZSITE AND YUMA...AS WELL AS BLYTHE AND THE IMPERIAL VALLEY TOWNS IN SOUTHEAST CALIFORNIA. THE PRIMARY HAZARDOUS WEATHER RISKS OVER THIS OUTLOOK AREA INCLUDE STRONG AND DAMAGING WIND IN EXCESS OF 45 MPH...AREAS OF BLOWING DUST AND BRIEF HEAVY RAIN...ALONG WITH LIGHTNING. STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER THIS AFTERNOON. ESTLE
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 2:12 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 63 min |
| Sep 6, 3:22 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 53 min |
| Sep 6, 3:26 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 64 min |
| Sep 6, 4:16 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 59 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2002Every severe thunderstorm warning in 2002
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; radar from the NEXRAD Level II archive.