Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 44, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 16, 2011, 4:28 PM MST for Pima County, Arizona. It was in force for 92 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 16, 2011, 4:28 PM MST (23:28 UTC)
- Expired
- Aug 16, 2011, 6:00 PM MST
- In force
- 92 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 23:31 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 16, 4:50 PM MST | FLASH FLOOD | 6 Ese Marana, AZ | WATER FLOWING ACROSS HARTMANN ROAD NORTH OF CORTARO ROAD. |
| Aug 16, 4:50 PM MST | FLASH FLOOD | 7 Sw Oro Valley, AZ | WATER OVER INTERSECTION AT CORTARO FARMS RD AND OLDFATHER RD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.5 hours before the alert went out and 26 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
- 269 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1299 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
233
WGUS55 KTWC 162328
FFWTWC
AZC019-170100-
/O.NEW.KTWC.FF.W.0044.110816T2328Z-110817T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
428 PM MST TUE AUG 16 2011
THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
* UNTIL 600 PM MST
* AT 417 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A SEVERE THUNDERSTORM OVER OVER THE NORTHWEST
GREATER TUCSON AREA...ESPECIALLY AROUND INTERSTATE 10 EAST TO
CAMINO DEL LA TIERRA ROAD AND NORTH TO TANGERINE ROAD. MOVEMENT OF
THE STORM WAS WEST AT 5 MPH.
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 3226 11110 3238 11125 3240 11115 3239 11101
3227 11101
$$3 follow-up statements
620
WGUS75 KTWC 162340
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
440 PM MST TUE AUG 16 2011
AZC019-170100-
/O.CON.KTWC.FF.W.0044.000000T0000Z-110817T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
440 PM MST TUE AUG 16 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR
NORTHEASTERN PIMA COUNTY...
AT 433 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM PRODUCING FLASH FLOODING OVER
PORTIONS OF THE NORTHWEST GREATER TUCSON AREA. AUTOMATED RAIN GAUGE
AT THE SANTA CRUZ RIVER AND INA ROAD REPORTED .91 OF AN INCH OF RAIN
IN LESS THAN 1 HOUR. RADAR INDICATED THAT THE HEAVIEST RAINFALL HAD
BEEN ACROSS PARTS OF MARANA NEAR CORTARO ROAD AND WESTERN SECTIONS
OF THE CASA ADOBES AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3226 11110 3238 11125 3240 11115 3239 11101
3227 11101
$$839
WGUS75 KTWC 170015
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
515 PM MST TUE AUG 16 2011
AZC019-170100-
/O.CON.KTWC.FF.W.0044.000000T0000Z-110817T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
515 PM MST TUE AUG 16 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR
NORTHEASTERN PIMA COUNTY...
A THUNDERSTORM PRODUCED FLASH FLOODING ACROSS PARTS OF THE NORTHWEST
SIDE OF TUCSON AROUND MARANA AND THE CASA ADOBES AREA...ESPECIALLY
ALONG INTERSTATE 10 NEAR CORTARO FARMS ROAD AND INA ROAD. THIS STORM
HAS SINCE MOVED WEST OF THE AREA...BUT WATER CONTINUED TO FLOW AT
ELEVATED LEVELS IN NORMALLY DRY WASHES AND SMALL STREAMS.
THEREFORE...THE FLASH FLOOD WARNING WILL REMAIN IN EFFECT UNTIL 600
PM MST SINCE RUNOFF CONTINUED ACROSS THE AREA.
HERE ARE A FEW REPORTS OF RAINFALL MEASURED BY PIMA COUNTY FLOOD
CONTROL AUTOMATED RAIN GAUGES IN THE PAST 6 HOURS...
CANADA DEL ORO AT GOLDER RA 0.59
SANTA CRUZ RIVER AT INA RD 1.18
CANADA DEL ORO WASH AT INA 0.51
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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. MOVE TO HIGHER GROUND.
&&
LAT...LON 3226 11110 3238 11125 3240 11115 3239 11101
3227 11101
$$241
WGUS75 KTWC 170052
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
552 PM MST TUE AUG 16 2011
AZC019-170101-
/O.EXP.KTWC.FF.W.0044.000000T0000Z-110817T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
552 PM MST TUE AUG 16 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM MST FOR NORTHEASTERN
PIMA COUNTY...
ELEVATED FLOWS IN NORMALLY DRY WASHES CONTINUED TO SUBSIDE SO THE
WARNING WILL EXPIRE ON TIME AT 600 PM MST.
LAT...LON 3226 11110 3238 11125 3240 11115 3239 11101
3227 11101
$$The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 9:39 PM MST | Special Weather Statement | TWC | Pima | 36 min |
| Aug 15, 9:56 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 15, 9:59 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Aug 15, 10:42 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 min |
| Aug 15, 11:28 PM MST | Severe Thunderstorm Warning | TWC | Pima | 62 min |
| Aug 15, 11:39 PM MST | Areal Flood Advisory | TWC | Pima | 81 min |
| Aug 16, 3:11 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 2 hr |
| Aug 16, 3:53 PM MST | Flash Flood Warning | TWC | Pima | 82 min |
| Aug 16, 4:14 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
Nearby
Flash Flood Warnings in Arizona, 2011Every flash flood warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.