Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 41, NWS Tucson, AZ

August 14, 2014Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 14, 2014, 2:37 PM MST for Pima County, Arizona. It was in force for 83 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 14, 2014, 2:37 PM MST (21:37 UTC)
Expired: Aug 14, 2014, 4:00 PM MST
In force: 83 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 110 km from the middle of the area, began a volume at 21:39 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, 9.6 hours before the alert went out and 98 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: 665 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1462 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: -2 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.

233 
WGUS55 KTWC 142137
FFWTWC
AZC019-142300-
/O.NEW.KTWC.FF.W.0041.140814T2137Z-140814T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
237 PM MST THU AUG 14 2014

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL PIMA COUNTY IN SOUTHEAST ARIZONA...TOHONO O'ODHAM    
  NATION

* UNTIL 400 PM MST

* AT 224 PM MST...VERY HEAVY RAINFALL CONTINUED IN AND AROUND THE 
COMMUNITIES OF SAN MIGUEL...CHOULIC AND SOUTH KOMELIK. RADAR 
INDICATED A LARGE AREA OF OVER 2 INCHES HAD FALLEN SINCE 145 PM MST. 
EXCESSIVE RUNOFF WILL CAUSE FLOODING OF LOW-LYING AREAS AND WASHES 
IN THE AREA. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH
  KOMELIK AND CHOULIC

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF
CREEKS AND STREAMS.

&&

LAT...LON 3178 11184 3178 11164 3150 11158 3162 11195

$$

1 follow-up statement

959 
WGUS75 KTWC 142259
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
359 PM MST THU AUG 14 2014

AZC019-142307-
/O.EXP.KTWC.FF.W.0041.000000T0000Z-140814T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
359 PM MST THU AUG 14 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM MST FOR SOUTH
CENTRAL PIMA COUNTY...

THE SHOWERS AND THUNDERSTORMS THAT PROMPTED THE FLASH FLOOD WARNING 
HAD ENDED AND MOVED WEST OF THE AREA. SOME MINOR PONDING OF WATER ON 
ROADS AND IN LOW-LYING AREAS WILL LIKELY BE AROUND FOR A LITTLE 
WHILE LONGER...BUT THE THREAT OF FLASH FLOODING HAD ENDED. 
THUS...THE WARNING WILL EXPIRE ON TIME.  

REMEMBER...A SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT UNTIL 430 
PM MST FOR MUCH OF THE TOHONO O'ODHAM NATION.

LAT...LON 3178 11184 3178 11164 3150 11158 3162 11195

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 5:33 PM MST	Flash Flood Warning	TWC	Cochise, Pima	117 min
Aug 13, 5:43 PM MST	Special Weather Statement	TWC	Cochise	32 min
Aug 13, 6:30 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Aug 14, 11:13 AM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 14, 11:52 AM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	113 min
Aug 14, 12:11 PM MST	Special Weather Statement	TWC		34 min
Aug 14, 12:30 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Aug 14, 1:02 PM MST	Flash Flood Warning	TWC	Pima	88 min
Aug 14, 1:37 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 14, 2:19 PM MST	Special Weather Statement	TWC	Pinal	41 min
Aug 14, 3:08 PM MST	Special Weather Statement	TWC	Pinal	37 min
Aug 14, 4:12 PM MST	Areal Flood Advisory	TWC	Pima	2 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.