Alert archive / Arizona / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 79, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 12, 2011, 5:33 PM MST for Graham County, Greenlee County, Arizona. It was in force for 42 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
- Aug 12, 2011, 5:33 PM MST (00:33 UTC)
- Expired
- Aug 12, 2011, 6:15 PM MST
- In force
- 42 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
Counties Graham County, AZ, Greenlee County, AZ
The radar
The Tucson radar (KEMX), 171 km from the middle of the area, began a volume at 00:35 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 nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 0.6 hours before the alert went out and 175 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
- 90 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1450 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
055
WUUS55 KTWC 130033
SVRTWC
AZC009-011-130115-
/O.NEW.KTWC.SV.W.0079.110813T0033Z-110813T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
533 PM MST FRI AUG 12 2011
THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL GRAHAM COUNTY IN SOUTHEAST ARIZONA...
SOUTHERN GREENLEE COUNTY IN SOUTHEAST ARIZONA...
* UNTIL 615 PM MST
* AT 524 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM CLIFTON TO GUTHRIE TO 15 MILES SOUTHEAST OF CLIFTON NEAR
HIGHWAY 191 AND MOVING WEST AT 5 TO 8 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MORENCI
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH...
LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM.
&&
LAT...LON 3273 10929 3285 10946 3301 10951 3311 10920
3295 10911 3290 10903 3282 10904
TIME...MOT...LOC 0031Z 070DEG 5KT 3300 10926 3292 10921
3288 10914
$$
MEYER1 follow-up statement
156
WWUS55 KTWC 130115
SVSTWC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
615 PM MST FRI AUG 12 2011
AZC009-011-130125-
/O.EXP.KTWC.SV.W.0079.000000T0000Z-110813T0115Z/
GRAHAM AZ-GREENLEE AZ-
615 PM MST FRI AUG 12 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GREENLEE AND EAST
CENTRAL GRAHAM COUNTIES HAS EXPIRED...
AT 615 PM MST THE THUNDERSTORMS IN SOUTHERN GREENLEE COUNTY HAD
DIMINISHED TO BELOW SEVERE LEVELS. LOCALLY HEAVY RAINFALL MAY STILL
GENERATE SOME FLOODING ISSUES.
LAT...LON 3273 10929 3285 10946 3301 10951 3311 10920
3295 10911 3290 10903 3282 10904
TIME...MOT...LOC 0115Z 070DEG 5KT 3298 10933 3290 10928
3286 10921
$$
MEYERThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 5:50 PM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 115 min |
| Aug 12, 6:19 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 116 min |
| Aug 12, 6:58 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 62 min |
| Aug 12, 7:33 PM MST | Areal Flood Advisory | TWC | Cochise, Graham | 117 min |
| Aug 12, 8:27 PM MST | Special Weather Statement | TWC | Cochise | 48 min |
| Aug 13, 2:21 PM MST | Flash Flood Warning | TWC | Cochise | 84 min |
| Aug 13, 3:21 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 39 min |
| Aug 13, 3:55 PM MST | Areal Flood Advisory | TWC | Cochise | 2 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 2011Every severe thunderstorm warning in 2011
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.