Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 76, NWS Tucson, AZ

September 26, 2014Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 26, 2014, 2:13 PM MST for Santa Cruz 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
Sep 26, 2014, 2:13 PM MST (21:13 UTC)
Expired
Sep 26, 2014, 3:45 PM MST
In force
92 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 61 km from the middle of the area, began a volume at 21:16 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 80 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2014-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 812 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2014-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
812 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
1583 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

442 
WGUS55 KTWC 262113
FFWTWC
AZC023-262245-
/O.NEW.KTWC.FF.W.0076.140926T2113Z-140926T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
213 PM MST FRI SEP 26 2014

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL SANTA CRUZ COUNTY IN SOUTHEAST ARIZONA...THIS INCLUDES THE 
  CITY OF NOGALES...

* UNTIL 345 PM MST

* AT 200 PM MST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING CAUSED BY HEAVY RAINFALL IN THE RIO RICO AREA. CONTINUED 
MODERATE TO HEAVY THUNDERSTORM RAINFALL WILL LEAD TO ADDITIONAL 
FLOODING OF AREA WASHES FROM RIO RICO TO NOGALES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TUBAC AND 
RIO RICO.

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 3134 11112 3171 11115 3172 11083 3133 11081
      3133 11111

$$
1 follow-up statement
157 
WGUS75 KTWC 262247
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
347 PM MST FRI SEP 26 2014

AZC023-262253-
/O.EXP.KTWC.FF.W.0076.000000T0000Z-140926T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ AZ-
347 PM MST FRI SEP 26 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MST FOR CENTRAL
SANTA CRUZ COUNTY...

THE HEAVY RAINFALL THAT HIT CENTRAL SANTA CRUZ COUNTY EARLIER HAS 
HAD AMPLE TIME TO DRAIN INTO WASHES...AND THE THREAT OF FLASH 
FLOODING HAS SUBSIDED. HOWEVER...SIGNIFICANT PONDING OF WATER IS 
STILL LIKELY IN ROADWAY DIPS AND OTHER LOW LYING AREAS FOR SEVERAL 
HOURS. HEAVY RAINFALL IN NOGALES SONORA MAY ALSO RESULT IN A HEAVY 
FLOW IN THE NOGALES WASH LATE THIS AFTERNOON. 

AN URBAN AND SMALL STREAM FLOOD ADVISORY IS STILL IN EFFECT FOR 
SOUTHERN SANTA CRUZ COUNTY UNTIL 5 PM MST. 

LAT...LON 3134 11112 3171 11115 3172 11083 3133 11081
      3133 11111

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 25, 5:14 PM MSTAreal Flood AdvisoryTWCGraham, Greenlee2 hr
Sep 26, 11:31 AM MSTSpecial Weather StatementTWCPima29 min
Sep 26, 12:14 PM MSTSpecial Weather StatementTWCPima31 min
Sep 26, 12:17 PM MSTSpecial Weather StatementTWCPima28 min
Sep 26, 12:40 PM MSTAreal Flood AdvisoryTWCPima110 min
Sep 26, 1:17 PM MSTSpecial Weather StatementTWCSanta Cruz28 min
Sep 26, 1:26 PM MSTSevere Thunderstorm WarningTWCPima34 min
Sep 26, 1:42 PM MSTSevere Thunderstorm WarningTWCSanta Cruz33 min
Sep 26, 1:56 PM MSTAreal Flood AdvisoryTWCSanta Cruz3 hr
Sep 26, 2:03 PM MSTSpecial Weather StatementTWCPima42 min
Sep 26, 2:13 PM MSTAreal Flood AdvisoryTWCPima3 hr
Sep 26, 2:23 PM MSTSevere Thunderstorm WarningTWCPima37 min
Sep 26, 2:29 PM MSTSpecial Weather StatementTWCSanta Cruz31 min
Sep 26, 2:43 PM MSTFlash Flood WarningTWCPima2 hr
Sep 26, 2:57 PM MSTSpecial Weather StatementTWC48 min
Sep 26, 3:01 PM MSTSevere Thunderstorm WarningTWCPima31 min
Sep 26, 3:59 PM MSTSpecial Weather StatementTWC46 min
Sep 26, 4:52 PM MSTAreal Flood AdvisoryTWCPima6 hr
Sep 26, 4:55 PM MSTAreal Flood AdvisoryTWCPima3 hr

Nearby

Flash Flood Warnings in Arizona, 2014Every 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.