Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 31, NWS Tucson, AZ

August 7, 2000Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 7, 2000, 5:34 PM MST for Pima County, Arizona. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 7, 2000, 5:34 PM MST (00:34 UTC)
Expired
Aug 7, 2000, 6:15 PM MST
In force
41 min
Issued by
NWS Tucson, AZ
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Pima County, AZ

The radar

The Tucson radar (KEMX), 36 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, 0.6 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 00:00Z on 2000-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 218 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 00:00Z on 2000-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
218 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
2571 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
65 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 
WUUS55 KTWC 080035
SVRTUS
AZC019-080115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
534 PM MST MON AUG 7 2000

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL PIMA COUNTY IN ARIZONA
  THIS INCLUDES THE CITY OF GREEN VALLEY

* UNTIL 615 PM MST

* AT 528 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM 4 MILES WEST OF GREEN VALLEY NEARLY          
  STATIONARY.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN TUCSON.

LAT...LON 3192 11118 3179 11103 3204 11070 3220 11089

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 2:30 PM MST, 3 hours 4 minutes earlier.

Area forecast discussion, Aug 7, 2:30 PM MST, 3 hours 4 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
230 PM MST MON AUG 7 2000

SYNOPSIS...THE ATMOSPHERE OVER SOUTHEAST ARIZONA WILL REMAIN VERY
MOIST FOR THE NEXT SEVERAL DAYS. AFTERNOON AND EVENING THUNDERSTORMS
WILL DEVELOP EACH DAY IN THE MOUNTAINS WITH SOME STORMS MOVING INTO
VALLEY LOCATIONS. SOME OF THE STORMS WILL BE STRONG WITH HEAVY
RAINFALL AND GUSTY WINDS.

DISCUSSION...HAVE WORDED FORECAST FOR AS STRONG AS POSSIBLE WITHOUT
STEPPING INTO THE WATCH AREA BECAUSE OF SOME NAGGING THOUGHTS ABOUT
WHETHER THE STORMS WILL GET OFF THE MOUNTAINS OR NOT. STILL...A LOT
OF IMPRESSIVE ITEMS TO DISCUSS...RIM STORMS MUCH MORE IMPRESSIVE
THAN LAST TWO DAYS AND SHOWING GOOD MOTION TO SOUTH AND WEST. OTHER
STORMS DEVELOPING OVER MOUNTAINS JUST HANGING AROUND WAITING FOR
VALLEY CAPE TO CATCH UP. HAVE NOT HAD PWATER/CAPE SATELLITE
ESTIMATES SINCE 15Z BUT BELIEVE PWATER STILL NEAR 1.5 INCHES AND
CAPE PROBABLY APPROACHING 1000. MID LEVEL CAP WON'T BE TOO MUCH TO
OVERCOME AS STORMS MOVE DOWN FROM RIM. INITIAL MOTION OF STORMS MAY
BE SLOW ENTERING THE VALLEY AND ACCELERATE SOME AFTER THEY MOVE WEST
INTO DESERTS. POTENTIAL FOR HEAVY RAIN GREATEST THREAT BUT CAN'T
RULE OUT SEVERE...ESPECIALLY WINDS. SURFACE TEMPS HAVE GONE PAST
MODEL FORECAST VALUES.

HAVE COOLED AFTERNOON TEMPS AND LOWERED POPS TOMORROW IN
ANTICIPATION OF A GOOD DAY TODAY. STILL WITH COLD TEMPS ALOFT AND
UPPER LEVEL DISTURBANCE STILL IN THE STATE WE WILL HAVE STORMS
TOMORROW...BUT MOST HANGING CLOSE TO MOUNTAINS OR WEAKENING AS THEY
ENTER THE VALLEYS. MONSOON FLOW AS SHOWN BY MRF WILL KEEP US IN GOOD
PATTERN FOR MORE STORMS SO NO CHANGE TO EXTENDED.

.TWC...NONE.

In the hours before

Local storm report, Aug 7, 5:09 PM MST, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
509 PM MST MON AUG 7 2000

TIME (MST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

415 PM     5 SE FORT THOMAS          AZ   WIND DAMAGE
08/07/00   Graham                         ONE HALF ROOF BLOWN OFF HOUSE
                                          (ESTIMATED TIME 415 PM)

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 5:20 PM MSTSevere Thunderstorm WarningTWCCochise35 min
Aug 7, 6:22 PM MSTFlash Flood WarningTWCPima23 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000

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.