Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 24, NWS Tucson, AZ

July 24, 2011Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 24, 2011, 5:28 PM MST for Pima County, Arizona. It was in force for 92 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: Jul 24, 2011, 5:28 PM MST (00:28 UTC)
Expired: Jul 24, 2011, 7:00 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), 53 km from the middle of the area, began a volume at 00:29 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 00:00Z, 0.5 hours before the alert went out and 14 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 25 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 2608 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

349 
WGUS55 KTWC 250028
FFWTWC
AZC019-250200-
/O.NEW.KTWC.FF.W.0024.110725T0028Z-110725T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
528 PM MST SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITY OF TUCSON...

* UNTIL 700 PM MST

* AT 518 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER THE TUCSON METRO AREA. 
THE HEAVIEST RAINS HAVE FALLEN OVER CENTRAL TUCSON WHERE RADAR AND 
GAUGE REPORTS INDICATE AROUND 1.00 INCHES OF RAINFALL HAS OCCURED 
OVER THE PAST 30 MINUTES. WASHES AND LOW WATER CROSSINGS WILL BE 
FLOODED ACROSS CENTRAL TUCSON.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SEVEN
  FALLS...SAGUARO NATIONAL PARK WEST...SABINO CANYON...REDINGTON...
  MOUNT LEMMON/SUMMERHAVEN...CATALINA FOOTHILLS AND PICTURE ROCKS.

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.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 3203 11149 3235 11146 3236 11087 3251 11075
      3250 11046 3204 11046

$$

SHOEMAKER

2 follow-up statements

295 
WGUS75 KTWC 250118
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
618 PM MST SUN JUL 24 2011

AZC019-250200-
/O.CON.KTWC.FF.W.0024.000000T0000Z-110725T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
618 PM MST SUN JUL 24 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MST FOR
NORTHEASTERN PIMA COUNTY...

AT 606 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER THE TUCSON 
METRO AREA. THE HEAVIEST RAINS HAVE FALLEN OVER CENTRAL TUCSON WHERE 
RADAR AND GAUGE REPORTS INDICATE AROUND 1.00 INCHES OF RAINFALL HAS 
OCCURED OVER THE PAST HOUR. A GAUGE AT THE UNIVERSITY OF ARIZONA HAS 
RECEIVED 0.99 INCHES IN 45 MINUTES. THE HEAVIEST RAINFALL IS 
CURRENTLY BETWEEN DOWNTOWN...DAVIS MONTHAN AND HOUGHTON ROAD. THIS 
AREA CAN EXPECT UP TO 1.50 INCHES OF RAIN DURING THE NEXT 45 
MINUTES. WASHES AND LOW WATER CROSSINGS WILL BE FLOODED ACROSS 
CENTRAL TUCSON.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SEVEN
FALLS...SABINO CANYON...REDINGTON...MOUNT LEMMON/SUMMERHAVEN...
CATALINA FOOTHILLS AND PICTURE ROCKS.

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.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 3203 11149 3235 11146 3236 11087 3251 11075
      3250 11046 3204 11046

$$

SHOEMAKER

355 
WGUS75 KTWC 250155
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
655 PM MST SUN JUL 24 2011

AZC019-250205-
/O.EXP.KTWC.FF.W.0024.000000T0000Z-110725T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
655 PM MST SUN JUL 24 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 700 PM MST FOR NORTHEASTERN
PIMA COUNTY...

LAT...LON 3203 11149 3235 11146 3236 11087 3251 11075
      3250 11046 3204 11046

$$

CS

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 5:03 PM MST	Areal Flood Advisory	TWC	Cochise	87 min
Jul 24, 5:40 PM MST	Severe Thunderstorm Warning	TWC	Cochise	35 min
Jul 24, 6:13 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 24, 7:15 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 25, 11:54 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	2 hr
Jul 25, 1:19 PM MST	Special Weather Statement	TWC	Pima	26 min
Jul 25, 2:04 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	116 min
Jul 25, 3:06 PM MST	Flash Flood Warning	TWC	Cochise	114 min
Jul 25, 4:57 PM MST	Severe Thunderstorm Warning	TWC	Graham	33 min

Nearby

Flash Flood Warnings in Arizona, 2011 Every 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.