Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 33, NWS Tucson, AZ

August 12, 2014Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 12, 2014, 2:13 PM MST for Pima County, Arizona. It was in force for 2 hr. 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 12, 2014, 2:13 PM MST (21:13 UTC)
Expired: Aug 12, 2014, 4:15 PM MST
In force: 2 hr
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 21:13 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, 9.2 hours before the alert went out and 34 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: 467 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1902 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 44 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.

107 
WGUS55 KTWC 122113
FFWTWC
AZC019-122315-
/O.NEW.KTWC.FF.W.0033.140812T2113Z-140812T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
213 PM MST TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL PIMA COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 415 PM MST

* AT 202 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  1 TO 2 INCHES OF RAINFALL NEAR NEAR AND ESPECIALLY NORTH OF 
  THREE POINTS. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAGUARO
  NATIONAL PARK WEST AND RYAN FIELD. EXTENSIVE SHEET FLOODING IS 
  EXPECTED IN LOW LYING AREAS.  BRAWLEY WASH WILL ALSO BE FLOWING.

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 3216 11139 3231 11126 3225 11114 3201 11113
      3195 11127

$$

KD

2 follow-up statements

441 
WGUS75 KTWC 122153
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
253 PM MST TUE AUG 12 2014

AZC019-122315-
/O.CON.KTWC.FF.W.0033.000000T0000Z-140812T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
253 PM MST TUE AUG 12 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR
CENTRAL PIMA COUNTY...

AT 245 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THAT HEAVY RAIN HAD FALLEN NEAR THE THREE POINTS AREA AND
FLOODING LIKELY CONTINUES.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAGUARO
NATIONAL PARK WEST AND RYAN FIELD. ROADS IN THESE AREAS WILL LIKELY
BE FLOODED.  FLOWS ALONG BRAWLEY WASH CAN ALSO BE ANTICIPATED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS. TURN AROUND DONT DROWN.

&&

LAT...LON 3216 11139 3231 11126 3225 11114 3201 11113
      3195 11127

$$

KD

475 
WGUS75 KTWC 122323
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
423 PM MST TUE AUG 12 2014

AZC019-122332-
/O.EXP.KTWC.FF.W.0033.000000T0000Z-140812T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
423 PM MST TUE AUG 12 2014

...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL PIMA COUNTY...

THE HEAVY RAINFALL CAUSING FLASH FLOODING OVER CENTRAL PIMA COUNTY 
HAS GREATLY DIMINISHED AND THEREFORE THE FLASH FLOOD WARNING HAS 
BEEN ALLOWED TO EXPIRE.

SOME WASHES MAY STILL EXPERIENCE FLOWING WATER WITH SOME LOCALIZED 
PONDING OF WATER ON ROADWAYS. MOTORISTS SHOULD CONTINUE TO USE 
CAUTION AND DO NOT DRIVE ACROSS FLOODED ROADWAYS.


LAT...LON 3216 11139 3231 11126 3225 11114 3201 11113
      3195 11127

$$

JJB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 6:36 PM MST	Special Weather Statement	TWC		24 min
Aug 12, 2:18 AM MST	Flash Flood Watch	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	19 hr
Aug 12, 7:42 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 12, 12:52 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Aug 12, 1:18 PM MST	Areal Flood Advisory	TWC	Cochise	117 min
Aug 12, 1:23 PM MST	Special Weather Statement	TWC	Pima	37 min
Aug 12, 1:31 PM MST	Flash Flood Warning	TWC	Pima	59 min
Aug 12, 1:46 PM MST	Severe Thunderstorm Warning	TWC	Pima	59 min
Aug 12, 2:39 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Aug 12, 2:45 PM MST	Flash Flood Warning	TWC	Pima, Pinal	2 hr
Aug 12, 3:25 PM MST	Flash Flood Warning	TWC	Pinal	110 min
Aug 12, 3:44 PM MST	Areal Flood Advisory	TWC	Pima	3 hr

Nearby

Flash Flood Warnings in Arizona, 2014 Every flash flood warning in 2014

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.