Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 47, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 31, 2012, 5:13 PM MST for Santa Cruz 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
- Aug 31, 2012, 5:13 PM MST (00:13 UTC)
- Expired
- Aug 31, 2012, 7:15 PM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 00:14 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 00:00Z, 0.2 hours before the alert went out and 88 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
- 120 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 2732 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
442 WGUS55 KTWC 010013 FFWTWC AZC023-010215- /O.NEW.KTWC.FF.W.0047.120901T0013Z-120901T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 513 PM MST FRI AUG 31 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL SANTA CRUZ COUNTY IN SOUTHEAST ARIZONA... THIS INCLUDES THE CITY OF NOGALES... * UNTIL 715 PM MST * AT 505 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ANOTHER STRONG THUNDERSTORM MOVING SLOWLY NORTH TOWARD NOGALES FROM MEXICO. GAGE REPORTS INDICATED RAINFALL AMOUNTS NEAR 1 INCH IN SOME LOCATIONS FROM A PREVIOUS STORM. ADDITIONAL RAINFALL AMOUNTS IN EXCESS OF 1 INCH ARE EXPECTED TO CAUSE FLASH FLOODING IN THE NOGALES AREA. 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. && LAT...LON 3143 11105 3139 11087 3133 11086 3133 11105 $$ MEYER
2 follow-up statements
298 WGUS75 KTWC 010057 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 557 PM MST FRI AUG 31 2012 AZC023-010215- /O.CON.KTWC.FF.W.0047.000000T0000Z-120901T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SANTA CRUZ AZ- 557 PM MST FRI AUG 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MST FOR SOUTH CENTRAL SANTA CRUZ COUNTY... AT 550 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS INDICATING A THIRD THUNDERSTORM APPROACHING THE NOGALES AREA FROM MEXICO. THIS STORM WAS ABOUT 5 MILES SOUTH AND MOVING SLOWLY NORTH. THIS STORM COULD ADD UP TO ONE INCH OF ADDITIONAL RAINFALL TO EARLIER RAINFALL AMOUNTS BETWEEN .5 AND 1.2 INCHES. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3143 11105 3139 11087 3133 11086 3133 11105 $$ MEYER
090 WGUS75 KTWC 010208 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 708 PM MST FRI AUG 31 2012 AZC023-010217- /O.EXP.KTWC.FF.W.0047.000000T0000Z-120901T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SANTA CRUZ AZ- 708 PM MST FRI AUG 31 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 715 PM MST FOR SOUTH CENTRAL SANTA CRUZ COUNTY... AT 707 PM MST LITTLE ADDITIONAL RAINFALL WAS EXPECTED. EXPECT SOME FLOW IN NORMALLY DRY STREAMBEDS AND WASHES OVERNIGHT. LAT...LON 3143 11105 3139 11087 3133 11086 3133 11105 $$ MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 5:02 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 94 min |
| Sep 1, 3:02 PM MST | Special Weather Statement | TWC | 43 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.