Alert archive / Arizona / Flash Flood Warnings in 2002

Flash Flood Warning 47, NWS Tucson, AZ

September 6, 2002Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 6, 2002, 1:41 PM MST for Pima County, Arizona. It was in force for . 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 6, 2002, 1:41 PM MST (20:41 UTC)
Expired
Sep 6, 2002, 1:15 PM MST
In force
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Pima County, AZ

The radar

The Tucson radar (KEMX), 59 km from the middle of the area, began a volume at 20:45 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, 8.7 hours before the alert went out and 22 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 2002-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2002-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.193958Sfc1 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
53 J/kg
Mixed-layer CIN
-327 J/kg
Mixed-layer LCL
2441 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
10 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.

000 
WGUS55 KTWC 062043
FFWTWC
AZC019-062145-

BULLETIN - EAS ACTIVATION REQUESTED
COMBINED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
141 PM MST FRI SEP 6 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* COMBINED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING FOR...
  EAST CENTRAL PIMA COUNTY IN ARIZONA
    THIS INCLUDES THE CITY OF ORO VALLEY

* SEVERE THUNDERSTORM WARNING UNTIL 215 PM MST
  FLASH FLOOD WARNING UNTIL 245 PM MST

* AT 130 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE   
  THUNDERSTORM WITH VERY HEAVY RAIN ABOUT 15 MILES SOUTHWEST OF      
  TUCSON...MOVING NORTH AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ORO VALLEY AT 245 PM MST

A WIND GUST TO 80 MPH WAS REPORTED AT RYAN FIELD JUST AFTER 130 
PM...WITH VERY HEAVY RAIN AND MINOR FLOODING UNDERWAY.

THIS STORM WILL NOT ONLY PRODUCE DAMAGING WINDS....BUT ALSO FLASH
FLOODING OF ROADS AND NORMALLY DRY WASHES. MOVE INDOORS AND DO NOT
DRIVE INTO FLOODED AREAS. MOTORISTS SHOULD BE PREPARED FOR NEAR ZERO
VISIBILITIES IN WIND-DRIVEN DOWNPOURS.

LAT...LON 3210 11127 3203 11107 3240 11085 3249 11115

PYTLAK

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 1:41 PM MSTFlash Flood WarningTWCPima
Sep 6, 2:41 PM MSTFlash Flood WarningTWCPima64 min
Sep 6, 2:42 PM MSTFlash Flood WarningTWCPima2 hr
Sep 6, 2:46 PM MSTFlash Flood WarningTWCPima119 min
Sep 6, 3:37 PM MSTFlash Flood WarningTWCPima113 min
Sep 6, 3:38 PM MSTFlash Flood WarningTWCPima52 min
Sep 6, 4:13 PM MSTFlash Flood WarningTWCPima2 min

Nearby

Flash Flood Warnings in Arizona, 2002Every flash flood warning in 2002

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.