Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 35, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 7, 2011, 3:18 PM MST for Pima County, Arizona. It was in force for 117 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 7, 2011, 3:18 PM MST (22:18 UTC)
- Expired
- Aug 7, 2011, 5:15 PM MST
- In force
- 117 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 53 km from the middle of the area, began a volume at 22:20 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 (KTUS), launched 12:00Z, 10.3 hours before the alert went out and 25 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
- 897 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1635 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
784
WGUS55 KTWC 072218
FFWTWC
AZC019-080015-
/O.NEW.KTWC.FF.W.0035.110807T2218Z-110808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
318 PM MST SUN AUG 7 2011
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...
* UNTIL 515 PM MST
* AT 312 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
AN AREA OF STRONG TO SEVERE THUNDERSTORMS GENERATING VERY HEAVY
RAINFALL FROM NEAR ORO VALLEY THROUGH THE FOOTHILLS AND
NORTHEAST TUCSON. LITTLE MOVEMENT WAS NOTED...BUT STORMS WERE
SPREADING DEEPER INTO THE CITY FROM THE NORTH AND SOUTH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SABINO CANYON...DAVIS-MONTHAN AIR FORCE BASE AND SAGUARO NATIONAL
PARK EAST.
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 3250 11070 3232 11057 3216 11048 3217 11111
3251 11103
$$
MEYER2 follow-up statements
420
WGUS75 KTWC 072253
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
353 PM MST SUN AUG 7 2011
AZC019-080015-
/O.CON.KTWC.FF.W.0035.000000T0000Z-110808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
353 PM MST SUN AUG 7 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
NORTHEASTERN PIMA COUNTY...
AT 342 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE MULTIPLE STRONG TO SEVERE THUNDERSTORMS PRODUCING VERY
HEAVY RAIN. THE STRONGEST STORMS WERE NOTED FROM NEAR SABINO CANYON
DAM ACROSS NORTHEAST TUCSON TO SAGUARO NATIONAL PARK EAST. ANOTHER
STORM WAS REDEVELOPING JUST WEST OF ORO VALLEY. EARLIER RAINFALL
AMOUNTS INCLUDED 1.26 INCHES NEAR ORO VALLEY AND 1.30 INCHES OVER
NORTHERN PORTIONS OF THE RINCON MOUNTAINS...WITH WIDESPREAD 3/4 TO 1
INCH BETWEEN ACROSS PORTIONS OF NORTHERN TUCSON AND THE CATALINA
FOOTHILLS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TUCSON AND
ORO VALLEY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
&&
LAT...LON 3250 11070 3232 11057 3216 11048 3217 11111
3251 11103
$$
MEYER911
WGUS75 KTWC 080016
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
516 PM MST SUN AUG 7 2011
AZC019-080024-
/O.EXP.KTWC.FF.W.0035.000000T0000Z-110808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
516 PM MST SUN AUG 7 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MST FOR NORTHEASTERN
PIMA COUNTY...
AMPLE TIME HAS PASSED AND THE HEAVY RAINFALL RUNOFF FROM THE STRONG
STORMS OVER NORTHEAST PIMA COUNTY HAS HAD TIME TO DRAIN INTO
NORMALLY DRY WASHES. THEREFORE...THE THREAT OF FLASH FLOODING HAS
SUBSIDED. LIGHT TO MODERATE RAIN STILL CONTINUES TO FALL ACROSS
NORTHEAST PIMA COUNTY.
LAT...LON 3250 11070 3232 11057 3216 11048 3217 11111
3251 11103
$$The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 5:27 PM MST | Areal Flood Advisory | TWC | Pima | 78 min |
| Aug 7, 12:13 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Santa Cruz | 47 min |
| Aug 7, 1:06 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 105 min |
| Aug 7, 2:00 PM MST | Flash Flood Warning | TWC | Pima | 90 min |
| Aug 7, 2:31 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 44 min |
| Aug 7, 3:03 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 105 min |
| Aug 7, 3:14 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Aug 7, 4:46 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 104 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.