Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 35, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 19, 2012, 7:19 PM MST for Pima County, Pinal 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 19, 2012, 7:19 PM MST (02:19 UTC)
- Expired
- Aug 19, 2012, 8:45 PM MST
- In force
- 86 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties Pima County, AZ, Pinal County, AZ
The radar
The Tucson radar (KEMX), 54 km from the middle of the area, began a volume at 02:20 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, 2.3 hours before the alert went out and 16 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
- 309 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 2678 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
844 WGUS55 KTWC 200219 FFWTWC AZC019-021-200345- /O.NEW.KTWC.FF.W.0035.120820T0219Z-120820T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 719 PM MST SUN AUG 19 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE CITIES OF...TUCSON...ORO VALLEY...MARANA... EXTREME SOUTHEASTERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 845 PM MST * AT 712 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF THUNDERSTORMS CAPABLE OF PRODUCING FLASH FLOODING MOVING INTO THE TUCSON METRO AREA FROM THE WEST AND NORTHWEST. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SEVEN FALLS...SABINO CANYON...REDINGTON...MOUNT LEMMON/SUMMERHAVEN...DOVE MOUNTAIN...CATALINA STATE PARK...CATALINA FOOTHILLS AND CATALINA. 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. && LAT...LON 3250 11124 3252 11046 3199 11046 3208 11109 $$ MOLLERE
1 follow-up statement
555 WGUS75 KTWC 200306 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 806 PM MST SUN AUG 19 2012 AZC019-021-200345- /O.CON.KTWC.FF.W.0035.000000T0000Z-120820T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ-PINAL AZ- 806 PM MST SUN AUG 19 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MST FOR EXTREME SOUTHEASTERN PINAL AND NORTHEASTERN PIMA COUNTIES... AT 800 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER THE TUCSON METRO AREA. A TRAINED SPOTTER NEAR FORT LOWELL AND ALVERNON REPORTED 1.35 INCHES OF RAIN IN ABOUT 20 MINUTES. FLASH FLOODING IS LIKELY TO OCCUR WITH THIS STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3250 11124 3252 11046 3199 11046 3208 11109 $$ MOLLERE
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 5:05 PM MST | Areal Flood Advisory | TWC | Cochise | 85 min |
| Aug 19, 5:11 PM MST | Special Weather Statement | TWC | Cochise | 49 min |
| Aug 19, 5:13 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 47 min |
| Aug 19, 5:31 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 59 min |
| Aug 19, 5:59 PM MST | Areal Flood Advisory | TWC | Cochise | 91 min |
| Aug 19, 6:19 PM MST | Areal Flood Advisory | TWC | Graham, Pinal | 86 min |
| Aug 19, 6:37 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 23 min |
| Aug 19, 7:01 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 19, 7:11 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 49 min |
| Aug 19, 7:56 PM MST | Severe Thunderstorm Warning | TWC | Pima | 49 min |
| Aug 19, 8:47 PM MST | Flash Flood Warning | TWC | Pima, Pinal | 103 min |
| Aug 19, 8:58 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Aug 19, 9:25 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 2 hr |
| Aug 19, 10:56 PM MST | Flash Flood Warning | TWC | Pima | 64 min |
| Aug 20, 4:45 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 79 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.