Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 20, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 28, 2012, 3:15 PM MST for Pima County, Arizona. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2012, 3:15 PM MST (22:15 UTC)
- Expired
- Jul 28, 2012, 5:15 PM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 30 km from the middle of the area, began a volume at 22:15 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 12:00Z, 10.3 hours before the alert went out and 13 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
- 34 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1726 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -2 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.
887 WGUS55 KTWC 282215 FFWTWC AZC019-290015- /O.NEW.KTWC.FF.W.0020.120728T2215Z-120729T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 315 PM MST SAT JUL 28 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 515 PM MST * AT 306 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM ON THE EAST AND SOUTHEAST SIDES OF TUCSON. RADAR ESTIMATES INDICATE THAT LOCALLY ONE TO TWO INCHES OF RAINFALL HAVE OCCURRED ALONG AND TO THE EAST OF HOUGHTON ROAD. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAGUARO NATIONAL PARK EAST AND RITA RANCH PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3222 11086 3224 11063 3199 11064 3201 11087 $$ GL
3 follow-up statements
215 WGUS75 KTWC 282248 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 348 PM MST SAT JUL 28 2012 AZC019-290015- /O.CON.KTWC.FF.W.0020.000000T0000Z-120729T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 348 PM MST SAT JUL 28 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR EAST CENTRAL PIMA COUNTY... AT 339 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE EAST AND SOUTHEAST SIDES OF TUCSON. AN AUTOMATED RAIN GAUGE EAST OF HOUGHTON ROAD AND I-10 HAS RECORDED 1.18 INCHES OF RAINFALL. MEANWHILE...DOPPLER RADAR ESTIMATES INDICATE UP TO TWO INCHES OF RAIN HAS OCCURRED IN THIS AREA AS WELL PRODUCING FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3222 11086 3224 11063 3199 11064 3201 11087 $$ GL
792 WGUS75 KTWC 282320 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 420 PM MST SAT JUL 28 2012 AZC019-290015- /O.CON.KTWC.FF.W.0020.000000T0000Z-120729T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 420 PM MST SAT JUL 28 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR EAST CENTRAL PIMA COUNTY... AT 412 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAINFALL HAS COME TO AN END OVER THE FAR EAST AND SOUTHEAST SIDES OF TUCSON. HOWEVER...WITH RAINFALL AMOUNTS OF ONE TO TWO INCHES IN THIS AREA...FLASH FLOODING WILL CONTINUE IN THIS AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAGUARO NATIONAL PARK EAST. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3222 11086 3224 11063 3199 11064 3201 11087 $$ GL
496 WGUS75 KTWC 290008 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 508 PM MST SAT JUL 28 2012 AZC019-290016- /O.EXP.KTWC.FF.W.0020.000000T0000Z-120729T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 508 PM MST SAT JUL 28 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MST FOR EAST CENTRAL PIMA COUNTY... HEAVY RAINFALL HAS GENERALLY ENDED FOR MORE THAN AN HOUR ACROSS THE EAST AND SOUTHEAST SIDES OF TUCSON. THUS...FLASH FLOODING ACROSS THIS AREA HAS NOW SUBSIDED AND THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. SOME WASHES WILL CONTINUE TO EXPERIENCE ELEVATED FLOWS INTO THE EARLY EVENING. LAT...LON 3222 11086 3224 11063 3199 11064 3201 11087 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 6:43 PM MST | Special Weather Statement | TWC | 47 min | |
| Jul 27, 8:49 PM MST | Special Weather Statement | TWC | 41 min | |
| Jul 28, 11:45 AM MST | Special Weather Statement | TWC | Cochise | 30 min |
| Jul 28, 1:06 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Jul 28, 1:45 PM MST | Areal Flood Advisory | TWC | Cochise, Graham | 3 hr |
| Jul 28, 2:26 PM MST | Special Weather Statement | TWC | 34 min | |
| Jul 28, 2:35 PM MST | Special Weather Statement | TWC | Graham | 40 min |
| Jul 28, 2:44 PM MST | Severe Thunderstorm Warning | TWC | Pima | 31 min |
| Jul 28, 3:02 PM MST | Special Weather Statement | TWC | Santa Cruz | 43 min |
| Jul 28, 3:08 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Jul 28, 3:11 PM MST | Flash Flood Warning | TWC | Santa Cruz | 60 min |
| Jul 28, 3:29 PM MST | Special Weather Statement | TWC | 31 min | |
| Jul 28, 3:33 PM MST | Special Weather Statement | TWC | 42 min | |
| Jul 28, 3:54 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Jul 28, 4:04 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 41 min |
| Jul 28, 4:23 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Jul 28, 4:44 PM MST | Special Weather Statement | TWC | Pinal | 46 min |
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.