Alert archive / Arizona / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 70, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 11, 2002, 7:38 PM MST for Greenlee County, Arizona. It was in force for 52 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 11, 2002, 7:38 PM MST (02:38 UTC)
- Expired
- Sep 11, 2002, 8:30 PM MST
- In force
- 52 min
- Issued by
- NWS Tucson, AZ
- Area
- Counties, with a storm outline in the text
County Greenlee County, AZ
The radar
The Tucson radar (KEMX), 184 km from the middle of the area, began a volume at 02:40 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 00:00Z, 2.6 hours before the alert went out and 243 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
- 185 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 2265 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
284 WUUS55 KTWC 120238 SVRTWC AZC011-120330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 738 PM MST WED SEP 11 2002 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL GREENLEE COUNTY IN ARIZONA * UNTIL 830 PM MST * AT 738 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES NORTH OF MORENCI...OR ABOUT 30 MILES NORTHEAST OF SAFFORD...MOVING NORTH AT 20 MPH. GO INSIDE A STRONG BUILDING. DAMAGING WINDS...DEADLY LIGHTNING...AND HEAVY RAINS ARE LIKELY. LAT...LON 3304 10945 3285 10934 3341 10917 3350 10944
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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 11, 2:30 PM MST, 5 hours 8 minutes earlier.
Area forecast discussion, Sep 11, 2:30 PM MST, 5 hours 8 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST WED SEP 11 2002 .SYNOPSIS...WE WILL SLOWLY LOSE OUR MOISTURE SUPPLY OVER THE NEXT SEVERAL DAYS WITH A GRADUAL END IN THE THUNDERSTORM ACTIVITY. A MUCH DRIER AIRMASS WILL OVERSPREAD THE DESERT SOUTHWEST FOR THE UPCOMING WEEKEND. THIS WILL BRING TEMPERATURES BACK TO NEAR OR SLIGHTLY ABOVE NORMAL BY THE WEEKEND. .DISCUSSION...WARM AIR ALOFT HAS PUT A LID ON MOST STORMS AND EVEN THE ONES THAT GROW STILL ARE NO WHERE NEAR YESTERDAYS STORMS. STILL EXPECT A STORM OR TWO TO POP UP THIS EVENING IN PIMA...SANTA CRUZ COUNTY. WEAK UPPER DISTURBANCE WILL MOVE INTO THE STATE THURSDAY AND MODELS COOL US BACK DOWN AGAIN AT H5 SO WILL KEEP POPS IN TUS AND EAST AS THERE WILL BE ENOUGH LOW LEVEL MOISTURE IN PLACE FOR STORMS. FRIDAY SEEMS ON TO SO HAVE LEFT MENTION IN FOR THAT DAY ALSO. THEN WE ARE OUT OF MOISTURE AND STORMS AS NORTHWEST FLOW ALOFT CHASES THE MONSOON BOUNDARY INTO MEXICO. WE WILL HAVE WEAK RIDGING NEXT WEEK FOR DELIGHTFUL MORNINGS AND NOT TOO HOT AFTERNOONS. .TWC...NONE.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 5:30 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 45 min |
| Sep 11, 6:37 PM MST | Severe Thunderstorm Warning | TWC | Graham | 38 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.