Alert archive / Arizona / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 49, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 9, 2011, 7:47 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 28 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 9, 2011, 7:47 PM MST (02:47 UTC)
- Expired
- Sep 9, 2011, 8:15 PM MST
- In force
- 28 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 30 km from the middle of the area, began a volume at 02:47 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 9, 7:50 PM MST | TSTM WND DMG | Maricopa, AZ | DOWNED POWER LINES |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 2.8 hours before the alert went out and 35 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
- 87 J/kg
- Mixed-layer CIN
- -287 J/kg
- Mixed-layer LCL
- 3187 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
094 WUUS55 KPSR 100247 SVRPSR AZC013-021-100315- /O.NEW.KPSR.SV.W.0049.110910T0247Z-110910T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 747 PM MST FRI SEP 9 2011 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE CITY OF SUN LAKES... WEST CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 815 PM MST * AT 741 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MARICOPA...OR 15 MILES SOUTHWEST OF SUN LAKES...AND MOVING NORTHEAST AT 20 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OLBERG AND BAPCHULE ON THE GILA RIVER INDIAN RESERVATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ENCOUNTER DENSE BLOWING DUST WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE. && LAT...LON 3329 11192 3307 11162 3286 11195 3307 11220 TIME...MOT...LOC 0247Z 222DEG 17KT 3305 11197 $$ HV
1 follow-up statement
765 WWUS55 KPSR 100307 SVSPSR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 807 PM MST FRI SEP 9 2011 AZC013-021-100315- /O.CON.KPSR.SV.W.0049.000000T0000Z-110910T0315Z/ PINAL AZ-MARICOPA AZ- 807 PM MST FRI SEP 9 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM MST FOR CENTRAL MARICOPA AND WEST CENTRAL PINAL COUNTIES... AT 805 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. IN ADDITION...DENSE BLOWING DUST MAY ACCOMPANY THIS SEVERE STORM. THIS STORM WAS LOCATED NEAR OLBERG...OR 9 MILES SOUTH OF SUN LAKES...MOVING NORTHEAST AT 20 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BAPCHULE...SANTAN AND SACATON PRECAUTIONARY/PREPAREDNESS ACTIONS... STRONG GUSTY WINDS HAVE SPREAD OUT AHEAD OF THE STORM...AND WILL ARRIVE SEVERAL MINUTES BEFORE THE RAIN AND LIGHTNING. IF YOU ARE IN THE WARNING AREA...GO INSIDE A STURDY BUILDING. REMEMBER...A SEVERE THUNDERSTORM WILL PRODUCE DAMAGING WINDS AND DEADLY LIGHTNING REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. && LAT...LON 3329 11192 3307 11162 3286 11195 3307 11220 TIME...MOT...LOC 0306Z 222DEG 17KT 3312 11190 $$ WOODALL
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 5:03 PM MST | Special Weather Statement | PSR | Pinal | 42 min |
| Sep 9, 5:08 PM MST | Special Weather Statement | PSR | Yuma | 52 min |
| Sep 9, 5:47 PM MST | Special Weather Statement | PSR | Yuma | 43 min |
| Sep 9, 5:59 PM MST | Areal Flood Advisory | PSR | La Paz | 2 hr |
| Sep 9, 6:22 PM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 113 min |
| Sep 9, 6:38 PM MST | Special Weather Statement | PSR | 52 min | |
| Sep 9, 7:03 PM MST | Special Weather Statement | PSR | 57 min | |
| Sep 9, 7:09 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 36 min |
| Sep 9, 7:21 PM MST | Flash Flood Warning | PSR | La Paz, Yuma | 114 min |
| Sep 9, 7:51 PM MST | Special Weather Statement | PSR | 39 min | |
| Sep 9, 8:13 PM MST | Special Weather Statement | PSR | Maricopa | 47 min |
| Sep 9, 8:24 PM MST | Areal Flood Advisory | PSR | Maricopa, Yuma | 2 hr |
| Sep 9, 9:16 PM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 119 min |
| Sep 9, 10:37 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 113 min |
| Sep 9, 11:21 PM MST | Special Weather Statement | PSR | 39 min | |
| Sep 10, 4:57 PM MST | Special Weather Statement | PSR | Pinal | 48 min |
| Sep 10, 4:59 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 31 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.