Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 31, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 17, 2012, 11:02 AM MST for Pima County, Pinal County, Arizona. It was in force for 118 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 17, 2012, 11:02 AM MST (18:02 UTC)
- Expired
- Aug 17, 2012, 1:00 PM MST
- In force
- 118 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties Pima County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 94 km from the middle of the area, began a volume at 18:04 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, 6.0 hours before the alert went out and 131 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
- 560 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1232 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
344
WGUS55 KTWC 171802
FFWTWC
AZC019-021-172000-
/O.NEW.KTWC.FF.W.0031.120817T1802Z-120817T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1102 AM MST FRI AUG 17 2012
THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
SOUTHWESTERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA...
* UNTIL 100 PM MST
* AT 1054 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM SEVERAL THUNDERSTORMS OVER THE WARNED AREA.
THE HEAVIEST RAIN WAS INDICATED NEAR SIL NAGGIA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SIL
NAGGIA AND NEARBY INDIAN ROADS 33 AND 34. ALSO INCLUDED ARE THE
GU ACHI AND ANEGAM WASHES AND OTHERS THAT FLOW EAST INTO THE
SANTA ROSA VALLEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF
CREEKS AND STREAMS.
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 3250 11262 3250 11219 3268 11220 3268 11215
3272 11215 3272 11204 3277 11204 3277 11191
3211 11176 3238 11264
$$
KD1 follow-up statement
018
WGUS75 KTWC 171955
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1255 PM MST FRI AUG 17 2012
AZC019-021-172003-
/O.EXP.KTWC.FF.W.0031.000000T0000Z-120817T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-PINAL AZ-
1255 PM MST FRI AUG 17 2012
...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN PINAL AND
NORTH CENTRAL PIMA COUNTIES...
SOME RUNOFF WILL CONTINUE FROM EARLIER HEAVY RAINFALL BUT THE
HEAVIEST RAIN HAD ENDED FOR NOW. ADDITIONAL THUNDERSTORMS ARE STILL
POSSIBLE AND THE AREA REMAINS UNDER A FLASH FLOOD WATCH UNTIL 8 PM
MST.
LAT...LON 3250 11262 3250 11219 3268 11220 3268 11215
3272 11215 3272 11204 3277 11204 3277 11191
3211 11176 3238 11264
$$
KDThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 10:01 PM MST | Areal Flood Advisory | TWC | Graham | 119 min |
| Aug 17, 10:23 AM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
| Aug 17, 10:28 AM MST | Flash Flood Watch | TWC | Cochise, Graham, Pima, Pinal, Santa Cruz | 6 hr |
| Aug 17, 12:26 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 17, 12:39 PM MST | Flash Flood Warning | TWC | Pima | 117 min |
| Aug 17, 1:00 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Aug 17, 1:20 PM MST | Areal Flood Advisory | TWC | Pinal | 3 hr |
| Aug 17, 2:05 PM MST | Flash Flood Warning | TWC | Pima, Pinal | 115 min |
| Aug 17, 2:36 PM MST | Areal Flood Advisory | TWC | Pima | 3 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.