Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 113, NWS Tucson, AZ

September 21, 1997Cochise County, Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 21, 1997, 7:35 AM MST for Cochise County, Pima County, Arizona. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 21, 1997, 7:35 AM MST (14:35 UTC)
Expired
Sep 21, 1997, 8:05 AM MST
In force
30 min
Issued by
NWS Tucson, AZ
Area
Whole counties

Counties Cochise County, AZ, Pima County, AZ

The radar

The Tucson radar (KEMX), 17 km from the middle of the area, began a volume at 14:35 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, 2.6 hours before the alert went out and 24 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 1997-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 393 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 1997-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
393 J/kg
Mixed-layer CIN
-206 J/kg
Mixed-layer LCL
1697 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 2:08 AM MSTSevere Thunderstorm WarningTWCPima42 min
Sep 21, 4:03 AM MSTSevere Thunderstorm WarningTWCPima, Pinal67 min
Sep 21, 4:39 AM MSTSevere Thunderstorm WarningTWCGraham61 min
Sep 21, 12:56 PM MSTFlash Flood WarningTWCCochise94 min
Sep 21, 12:56 PM MSTSevere Thunderstorm WarningTWCCochise94 min
Sep 21, 2:16 PM MSTFlash Flood WarningTWCCochise64 min
Sep 21, 2:16 PM MSTSevere Thunderstorm WarningTWCCochise64 min
Sep 21, 2:28 PM MSTFlash Flood WarningTWCCochise, Graham62 min
Sep 21, 2:28 PM MSTSevere Thunderstorm WarningTWCCochise, Graham62 min
Sep 21, 3:33 PM MSTFlash Flood WarningTWCCochise62 min

Nearby

Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm warning in 1997

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.