Alert archive / Arizona / Flash Flood Warnings in 2002

Flash Flood Warning 20, NWS Tucson, AZ

August 5, 2002Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 5, 2002, 5:52 PM MST for Santa Cruz County, Arizona. It was in force for 98 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 5, 2002, 5:52 PM MST (00:52 UTC)
Expired
Aug 5, 2002, 7:30 PM MST
In force
98 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 49 km from the middle of the area, began a volume at 00:38 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 00:00Z, 0.9 hours before the alert went out and 75 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 00:00Z on 2002-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1177 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2002-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 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
1177 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
2259 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KTWC 060052
FFWTWC
AZC023-060245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
550 PM MST MON AUG 5 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SANTA CRUZ COUNTY IN ARIZONA
    THIS INCLUDES NOGALES...SONOITA...PATAGONIA

* UNTIL 730 PM MST

* AT 545 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY 
  HEAVY RAIN FROM EAST OF NOGALES...EXTENDING NORTHEAST THROUGH
  SONOITA AND ELGIN. MOVEMENT WAS TO THE NORTHWEST AT 15 MPH.

LAT...LON 3135 11112 3134 11046 3172 11046 3172 11114

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 5:12 PM MSTFlash Flood WarningTWCCochise3 min
Aug 5, 5:13 PM MSTFlash Flood WarningTWCCochise62 min
Aug 5, 5:30 PM MSTSevere Thunderstorm WarningTWCPima45 min
Aug 5, 5:42 PM MSTSevere Thunderstorm WarningTWCSanta Cruz33 min
Aug 5, 5:50 PM MSTFlash Flood WarningTWCSanta Cruz40 min
Aug 5, 5:55 PM MSTFlash Flood WarningTWCPinal80 min
Aug 5, 5:55 PM MSTFlash Flood WarningTWCPinal20 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.