Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 34, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 17, 2012, 2:05 PM MST for Pima County, Pinal County, Arizona. It was in force for 115 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, 2:05 PM MST (21:05 UTC)
- Expired
- Aug 17, 2012, 4:00 PM MST
- In force
- 115 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), 87 km from the middle of the area, began a volume at 21:05 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, 9.1 hours before the alert went out and 47 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.
612
WGUS55 KTWC 172105
FFWTWC
AZC019-021-180000-
/O.NEW.KTWC.FF.W.0034.120817T2105Z-120818T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
205 PM MST FRI AUG 17 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...
CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA...
* UNTIL 500 PM MST
* AT 156 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM NUMEROUS THUNDERSTORMS FROM THE CATALINA
MOUNTAINS ON THE NORTH SIDE OF TUCSON NORTH AND WESTWARD INTO
SOUTHEAST PINAL COUNTY. DOPPLER RADAR ESTIMATES ARE HIGHEST ACROSS
MUCH OF SOUTHEAST PINAL COUNTY INTO FAR NORTHERN PIMA COUNTY WEST OF
SILVER BELL WITH ONE TO TWO INCHES OF RAINFALL AND SOME LOCALIZED
HIGHER AMOUNTS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ORACLE AND
AVRA VALLEY
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 3233 11121 3225 11159 3240 11201 3278 11155
3312 11095 3233 11049 3220 11102
$$
GL1 follow-up statement
469
WGUS75 KTWC 172300
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
400 PM MST FRI AUG 17 2012
AZC019-021-172307-
/O.CAN.KTWC.FF.W.0034.000000T0000Z-120818T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-PINAL AZ-
400 PM MST FRI AUG 17 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL PINAL AND
NORTHEASTERN PIMA COUNTIES...
AT 357 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
SCATTERED TO NUMEROUS SHOWERS...AND ISOLATED THUNDERSTORMS...ACROSS
CENTRAL PIMA AND NORTHEASTERN PIMA COUNTIES. LIGHT TO MODERATE
RAINFALL HAD OCCURRED SINCE 3 PM MST. GIVEN THAT THE PROSPECT FOR
HEAVY RAINFALL HAS ENDED...THE FLASH FLOOD WARNING HAS BEEN
CANCELLED.
LAT...LON 3233 11121 3225 11159 3240 11201 3278 11155
3312 11095 3233 11049 3220 11102
$$The 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, 11:02 AM MST | Flash Flood Warning | TWC | Pima, Pinal | 118 min |
| 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, 2:36 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.