Alert archive / Arizona / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 58, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 10, 2012, 5:32 PM MST for Pima County, Arizona. It was in force for 43 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 10, 2012, 5:32 PM MST (00:32 UTC)
- Expired
- Aug 10, 2012, 6:15 PM MST
- In force
- 43 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
County Pima County, AZ
The radar
The Tucson radar (KEMX), 116 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.
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
Tuscon, AZ (KDMA), launched 00:00Z, 0.5 hours before the alert went out and 94 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
- 1414 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 3260 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
065 WUUS55 KTWC 110032 SVRTWC AZC019-110115- /O.NEW.KTWC.SV.W.0058.120811T0032Z-120811T0115Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 532 PM MST FRI AUG 10 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE CITY OF SELLS... * UNTIL 615 PM MST * AT 526 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES WEST OF KITT PEAK...OR 11 MILES EAST OF SELLS...AND MOVING WEST AT 15 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAN ISIDRO...LITTLE TUCSON...ARTESA...COMOBABI...NOLIC...BIG FIELDS AND SELLS. 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 3185 11206 3221 11196 3201 11157 3182 11164 TIME...MOT...LOC 0031Z 111DEG 11KT 3196 11171 $$
2 follow-up statements
491 WWUS55 KTWC 110048 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 548 PM MST FRI AUG 10 2012 AZC019-110115- /O.CON.KTWC.SV.W.0058.000000T0000Z-120811T0115Z/ PIMA AZ- 548 PM MST FRI AUG 10 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR CENTRAL PIMA COUNTY... AT 547 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SAN ISIDRO...OR 6 MILES NORTHEAST OF SELLS...MOVING WEST AT 15 MPH. LAT...LON 3185 11206 3221 11196 3201 11157 3182 11164 TIME...MOT...LOC 0048Z 111DEG 11KT 3198 11180 $$
059 WWUS55 KTWC 110115 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 615 PM MST FRI AUG 10 2012 AZC019-110125- /O.EXP.KTWC.SV.W.0058.000000T0000Z-120811T0115Z/ PIMA AZ- 615 PM MST FRI AUG 10 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY HAS EXPIRED... THE STORM THAT PROMPTED THE WARNING WAS NO LONGER SEVERE. LAT...LON 3185 11206 3221 11196 3201 11157 3182 11164 TIME...MOT...LOC 0115Z 111DEG 11KT 3201 11189 $$
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 Aug 10, 2:12 PM MST, 3 hours 20 minutes earlier.
Area forecast discussion, Aug 10, 2:12 PM MST, 3 hours 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 212 PM MST FRI AUG 10 2012 .SYNOPSIS...STRONG HIGH PRESSURE WILL BRING HOT TEMPERATURES THROUGH THE WEEKEND WITH NEAR RECORD HIGHS IN SOME LOCATIONS. ISOLATED THUNDERSTORMS WILL BE LIMITED TO AREAS FROM TUCSON WESTWARD AND MAINLY NEAR THE MOUNTAINS THROUGH SATURDAY BEFORE INCREASING AGAIN EARLY NEXT WEEK. && .DISCUSSION...LATEST VIS SATELLITE IMAGERY SHOWS A DECENT CU FIELD MAINLY ACROSS PIMA/SANTA CRUZ AND COCHISE COUNTIES WITH JUST AN ISOLATED SHOWER OR TWO IN THE LAST HOUR OVER FAR WESTERN COCHISE/EASTERN SANTA CRUZ COUNTY. MEANWHILE...RELATIVELY DRIER AIR REMAINS IN CONTROL ACROSS MUCH OF THE FORECAST AREA WITH PWAT VALUES RANGING FROM ABOUT 0.75 INCHES ACROSS EASTERN AREAS TO 1.25 INCHES ACROSS THE WESTERN DESERTS. A WEAK INVERTED TROUGH IS SEEN ON THE LATEST WV IMAGERY MAKING ITS WAY NORTHWEST FROM SONORA MEXICO. WITH THAT SAID...EXPECT THE INFLUENCE OF THE TROUGH IN COMBINATION WITH THE MOISTURE FIELD TO RESULT IN A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS MAINLY FROM THE TUCSON AREA SOUTH AND WEST INTO THIS EVENING. THE WESTERN DESERTS WILL STILL BE UNDER THE INFLUENCE OF THIS INVERTED TROUGH SATURDAY WITH A FAIRLY SIMILAR SETUP EXPECTED RESULTING IN A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS MAINLY TO THE WEST OF TUCSON. BY SUNDAY AND INTO EARLY NEXT WEEK...LOOKING AT A GRADUAL INCREASE IN MOISTURE COMING AROUND THE HIGH PRESSURE ALOFT PARKED NEAR THE ARIZONA/NEW MEXICO BORDER TO AT LEAST BRING A SLIGHT CHANCE OF SHOWERS AND STORMS TO THE REMAINDER OF THE FORECAST AREA. TEMPERATURES ARE EXPECTED TO PEAK BY SUNDAY AND MONDAY WITH HIGHS JUST SHY OF 110 DEGREES IN TUCSON. BY MIDWEEK WE'LL BE WATCHING THE MOISTURE FROM WHAT IS CURRENTLY TD ERNESTO AND WHAT WILL LIKELY BECOME HECTOR IN THE NEXT COUPLE DAYS AS THE CIRCULATION MOVES INTO THE EASTERN PACIFIC. MEDIUM RANGE GUIDANCE HAS BEEN CONSISTENT IN BRINGING INCREASED MOISTURE FROM THE SOUTH BY MID TO LATE NEXT WEEK AS THE RIDGING ALOFT ELONGATED MORE EAST-WEST INTO THE GULF COAST STATES. THIS WOULD BRING A RAMP UP IN THE MONSOON. STILL PLENTY OF TIME TO MONITOR THIS BUT THIS SHOULD KNOCK TEMPS BACK DOWN CLOSER TO NORMAL BY LATER NEXT WEEK. && .AVIATION...FEW-SCT CLOUDS AROUND 8-12K FT AGL INTO EARLY SATURDAY MORNING. SLIGHT CHANCE OF -TSRA/-SHRA MAINLY SOUTH AND WEST OF KTUS THIS AFTERNOON/EVENING. SURFACE WINDS THRU THIS EVENING OR 11/06Z ELY/SELY 5-15 KTS WITH LOCAL GUSTS TO 25 THROUGH 03Z SATURDAY...OTHERWISE GENERALLY LESS THAN 10 KTS. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...STRONG HIGH PRESSURE ALOFT WILL RESULT IN A SLIGHT CHANCE OF THUNDERSTORMS FOR THE HIGHER TERRAIN AND AREAS WEST OF TUCSON THROUGH SATURDAY. THUNDERSTORM CHANCES WILL GRADUALLY INCREASE EARLY NEXT WEEK AS THE HIGH PRESSURE SYSTEM WEAKENS. GUSTY WINDS WILL SUBSIDE THIS EVENING...OTHERWISE EXPECT HOT DAYTIME TEMPERATURES WITH NORMAL DIURNAL WIND TRENDS INTO EARLY NEXT WEEK. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. WEATHER.GOV/TUCSON
Hazardous weather outlook, Aug 10, 12:15 PM MST, 5 hours 17 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 1215 PM MST FRI AUG 10 2012 AZZ501>503-515-110600- WESTERN PIMA COUNTY-TOHONO O'ODHAM NATION- UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY-BABOQUIVARI MOUNTAINS- 1215 PM MST FRI AUG 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE REGION THIS AFTERNOON AND INTO THIS EVENING. OTHERWISE...THE MAIN STORY WILL BE THE CONTINUED VERY HOT TEMPERATURES. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ISOLATED SHOWERS AND THUNDERSTORMS ARE ONCE AGAIN EXPECTED THIS WEEKEND WITH A GRADUAL INCREASE IN SHOWER AND THUNDERSTORM ACTIVITY BY THE MIDDLE OF NEXT WEEK. TEMPERATURES WILL REMAIN VERY HOT THIS WEEKEND WITH SOME GRADUAL COOLING NEXT WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ504>514-110600- TUCSON METRO AREA-SOUTH CENTRAL PINAL COUNTY- SOUTHEAST PINAL COUNTY-UPPER SAN PEDRO RIVER VALLEY- EASTERN COCHISE COUNTY BELOW 5000 FEET-UPPER GILA RIVER VALLEY- WHITE MOUNTAINS OF GRAHAM AND GREENLEE COUNTIES- GALIURO AND PINALENO MOUNTAINS-CHIRICAHUA MOUNTAINS- DRAGOON AND MULE AND HUACHUCA AND SANTA RITA MOUNTAINS- CATALINA AND RINCON MOUNTAINS- 1215 PM MST FRI AUG 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT VERY HOT TEMPERATURES ARE EXPECTED THIS AFTERNOON WITH MAINLY DRY CONDITIONS EXPECTED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED THIS WEEKEND WITH A GRADUAL INCREASE IN SHOWER AND THUNDERSTORM ACTIVITY BY THE MIDDLE OF NEXT WEEK. TEMPERATURES WILL REMAIN VERY HOT THIS WEEKEND WITH SOME GRADUAL COOLING NEXT WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. WEATHER.GOV/TUCSON
In the hours before
Local storm report, Aug 10, 5:00 PM MST, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
500 PM MST FRI AUG 10 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 PM TSTM WND DMG ORGAN PIPE NATIONAL MON 31.96N 112.80W
08/10/2012 PIMA AZ CO-OP OBSERVER
PIECES OF ROOF BLOWN OF VISITOR CENTER
&&
EVENT NUMBER TWC1200062
MJThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 5:05 PM MST | Severe Thunderstorm Warning | TWC | Pima | 25 min |
| Aug 10, 6:23 PM MST | Special Weather Statement | TWC | Pima | 52 min |
| Aug 11, 1:19 AM MST | Special Weather Statement | TWC | Pima | 41 min |
| Aug 11, 2:02 PM MST | Special Weather Statement | TWC | Pima | 43 min |
| Aug 11, 2:38 PM MST | Severe Thunderstorm Warning | TWC | Pima | 22 min |
| Aug 11, 3:35 PM MST | Severe Thunderstorm Warning | TWC | Pima | 40 min |
| Aug 11, 3:41 PM MST | Severe Thunderstorm Warning | TWC | Pima | 34 min |
| Aug 11, 3:45 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Aug 11, 4:09 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 11, 4:19 PM MST | Severe Thunderstorm Warning | TWC | Pima | 26 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2012Every severe thunderstorm warning in 2012
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.