Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 40, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 21, 2012, 2:49 PM MST for Pima County, Arizona. It was in force for 86 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 21, 2012, 2:49 PM MST (21:49 UTC)
- Expired
- Aug 21, 2012, 4:15 PM MST
- In force
- 86 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 51 km from the middle of the area, began a volume at 21:50 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 (KDMA), launched 12:00Z, 9.8 hours before the alert went out and 24 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
- 1386 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1261 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
191 WGUS55 KTWC 212149 FFWTWC AZC019-212315- /O.NEW.KTWC.FF.W.0040.120821T2149Z-120821T2315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 249 PM MST TUE AUG 21 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 415 PM MST * AT 236 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH HEAVY RAIN NEAR SABINO CANYON...MOVING SOUTHWEST AT 5 MPH. DOPPLER RADAR INDICATED THAT UP TO ONE INCH OF RAIN HAS FALLEN IN PORTIONS OF THE SABINO CANYON AREA. * THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN NEAR THE CATALINA FOOTHILLS. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES AND STREAMS AND ROADS. && LAT...LON 3229 11075 3236 11083 3242 11074 3236 11066 $$
2 follow-up statements
470 WGUS75 KTWC 212232 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 332 PM MST TUE AUG 21 2012 AZC019-212315- /O.CON.KTWC.FF.W.0040.000000T0000Z-120821T2315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 332 PM MST TUE AUG 21 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR NORTHEASTERN PIMA COUNTY... AT 325 PM MST...SHOWERS WERE WEAKENING NEAR SABINO CANYON. EARLIER VERY HEAVY RAINFALL BETWEEN 1 AND 2 INCHES NEAR AND NORTH OF SABINO CANYON WILL CONTINUE HEAVY RUNOFF IN THE AREA THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES... SABINO CREEK...BIRD CANYON AND AGUA CALIENTE WASH. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. && LAT...LON 3229 11075 3236 11083 3242 11074 3236 11066 $$ MEYER
914 WGUS75 KTWC 212316 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 416 PM MST TUE AUG 21 2012 AZC019-212325- /O.EXP.KTWC.FF.W.0040.000000T0000Z-120821T2315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 416 PM MST TUE AUG 21 2012 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN PIMA COUNTY... HEAVY FLOW IS STILL POSSIBLE INTO THE EARLY EVENING HOURS IN SABINO CANYON. ELSEWHERE STRONG TO SEVERE THUNDERSTORMS CONTINUED TO GENERATE LOCALLY HEAVY RAINFALL OVER OTHER AREAS OF EASTERN PIMA COUNTY. LAT...LON 3229 11075 3236 11083 3242 11074 3236 11066 $$ MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:59 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Aug 20, 6:10 PM MST | Areal Flood Advisory | TWC | Pima | 80 min |
| Aug 20, 7:26 PM MST | Areal Flood Advisory | TWC | Pima | 109 min |
| Aug 20, 7:40 PM MST | Special Weather Statement | TWC | Pima | 50 min |
| Aug 21, 12:17 PM MST | Severe Thunderstorm Warning | TWC | Graham | 28 min |
| Aug 21, 1:04 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 26 min |
| Aug 21, 2:10 PM MST | Special Weather Statement | TWC | Cochise | 50 min |
| Aug 21, 3:12 PM MST | Special Weather Statement | TWC | 48 min | |
| Aug 21, 3:28 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 47 min |
| Aug 21, 3:34 PM MST | Severe Thunderstorm Warning | TWC | Pima | 41 min |
| Aug 21, 3:53 PM MST | Areal Flood Advisory | TWC | Pima | 112 min |
| Aug 21, 4:15 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Aug 21, 4:34 PM MST | Areal Flood Advisory | TWC | Pima | 116 min |
| Aug 21, 4:42 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 2 hr |
Nearby
Flash Flood Warnings in Arizona, 2012Every flash flood 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.