Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 72, NWS Tucson, AZ

September 7, 2012Greenlee County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 7, 2012, 3:47 PM MST for Greenlee County, Arizona. It was in force for 118 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: Sep 7, 2012, 3:47 PM MST (22:47 UTC)
Expired: Sep 7, 2012, 5:45 PM MST
In force: 118 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Greenlee County, AZ

The radar

The Tucson radar (KEMX), 183 km from the middle of the area, began a volume at 22:50 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, 10.8 hours before the alert went out and 182 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: 1118 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 25 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.

863 
WGUS55 KTWC 072247
FFWTWC
AZC011-080045-
/O.NEW.KTWC.FF.W.0072.120907T2247Z-120908T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
347 PM MST FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 545 PM MST

* AT 340 PM MST...RADAR INDICATED THUNDERSTORMS PRODUCING
  VERY HEAVY RAIN APPROACHING MORENCI AND CLIFTON. ONE TO
  TWO INCHES OF RAIN IN LESS THAN ONE HOUR COULD FALL AS
  THESE STORMS MOVE SOUTH ALONG HIGHWAY 191.

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 3328 10947 3331 10905 3288 10905 3277 10926
      3306 10945

$$

KD

1 follow-up statement

049 
WGUS75 KTWC 080044
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
544 PM MST FRI SEP 7 2012

AZC011-080053-
/O.EXP.KTWC.FF.W.0072.000000T0000Z-120908T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
544 PM MST FRI SEP 7 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM MST FOR CENTRAL 
GREENLEE COUNTY...

HEAVY RAIN HAS ENDED ACROSS CENTRAL GREENLEE COUNTY AND WATER LEVELS 
IS WASHES AND STREAMS ARE LIKELY RECEDING. 

LAT...LON 3328 10947 3331 10905 3288 10905 3277 10926 3306 10945

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 5:15 PM MST	Flash Flood Warning	TWC	Pinal	90 min
Sep 6, 5:37 PM MST	Severe Thunderstorm Warning	TWC	Greenlee	38 min
Sep 6, 5:54 PM MST	Flash Flood Warning	TWC	Greenlee	111 min
Sep 6, 8:48 PM MST	Flash Flood Warning	TWC	Graham	117 min
Sep 6, 9:14 PM MST	Special Weather Statement	TWC	Graham	46 min
Sep 7, 4:50 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Sep 7, 5:47 AM MST	Flash Flood Watch	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	12 hr
Sep 7, 6:13 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Sep 7, 6:21 AM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Sep 7, 7:44 AM MST	Areal Flood Warning	TWC	Pima	6 hr
Sep 7, 12:55 PM MST	Flash Flood Warning	TWC	Cochise, Santa Cruz	110 min
Sep 7, 1:08 PM MST	Flash Flood Warning	TWC	Cochise	112 min
Sep 7, 1:58 PM MST	Flash Flood Warning	TWC	Cochise	3 hr
Sep 7, 2:45 PM MST	Areal Flood Advisory	TWC	Cochise	90 min
Sep 7, 3:35 PM MST	Areal Flood Advisory	TWC	Cochise	115 min
Sep 7, 4:52 PM MST	Special Weather Statement	TWC	Graham	23 min

Nearby

Flash Flood Warnings in Arizona, 2012 Every 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.