Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 17, NWS Tucson, AZ

June 29, 2000Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jun 29, 2000, 12:24 PM MST for Cochise County, Arizona. It was in force for 36 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
Jun 29, 2000, 12:24 PM MST (19:24 UTC)
Expired
Jun 29, 2000, 1:00 PM MST
In force
36 min
Issued by
NWS Tucson, AZ
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 70 km from the middle of the area, began a volume at 19:23 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, 7.4 hours before the alert went out and 100 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 2000-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 60 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 2000-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
60 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1316 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
20 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 291924
SVRTUS
AZC003-292000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1224 PM MST THU JUN 29 2000

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL COCHISE COUNTY IN ARIZONA

* UNTIL 100 PM MST

* AT 1221 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER CENTRAL COCHISE COUNTY...ABOUT 5 MILES    
  NORTH OF TOMBSTONE...OR ABOUT 22 MILES NORTHEAST OF SIERRA         
  VISTA...MOVING NORTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO STAY OVER RURAL CENTRAL     
  COCHISE COUNTY THROUGH 100 PM MST

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 3182 11018 3169 11003 3194 10941 3222 10967

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 Jun 29, 9:30 AM MST, 2 hours 54 minutes earlier.

Area forecast discussion, Jun 29, 9:30 AM MST, 2 hours 54 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
930 AM MST THU JUN 29 2000

SYNOPSIS...DEEP MONSOON MOISTURE WILL REMAIN OVER SOUTHEAST ARIZONA
INTO THE UPCOMING WEEKEND. THIS WILL ALLOW SCATTERED SHOWERS AND
THUNDERSTORMS TO DEVELOP EACH DAY...MAINLY IN THE AFTERNOON AND
EVENING. HEAVY RAIN WILL OCCUR WITH THE STRONGER STORMS.

DISCUSSION...THE DEBRIS CLOUD SHIELD IS NOT AS DENSE AS PREVIOUS
DAYS...THEREFORE EXPECT MORE SOLAR INSOLATION AND AN EARLIER START
TO DAYTIME CONVECTION. A MODIFIED 5 AM TUCSON SOUNDING YIELDS 900
J/KG OF CAPE FOR THE AFTERNOON HOURS. PW VALUES IN EXCESS OF 1.5
INCHES AND A LIGHT FLOW ALOFT WILL LEAD TO CONTINUED THREAT OF HEAVY
RAIN AND FLASH FLOODING. THE ADDITIONAL DAYTIME HEATING MENTIONED
ABOVE AND A SHEAR AXIS OVERHEAD SHOULD MAKE FOR AN ACTIVE AFTERNOON
AND EVENING. THE ZONES HAVE ALREADY BEEN UPDATED...THEREFORE NO
FURTHER UPDATES PLANNED.

OKULSKI

.TWC...NONE.

In the hours before

Special weather statement, Jun 29, 10:45 AM MST, 1 hour 39 minutes before
AZZ019-029>035-300600-
HAZARDOUS WEATHER OUTLOOK...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1045 AM MST THU JUN 29 2000

                           *CONDITIONAL*   *CONDITIONAL*
COUNTY             AREAL    PROBABILITY  RAIN GREATER THAN   STORM
                  COVERAGE   OF SEVERE     1.00      2.00    MOTION

COCHISE              42          21         32        12     SW   5
GRAHAM               43          22         33        13     SW   5
GREENLEE             49          26         42        21     SW   5
TUCSON/ERN PIMA      41          21         31        11      S   5
TOHONO OODHAM       33          13         24         4      E   5
SOUTHEAST PINAL      35          14         26         7     SE   5
WESTERN PIMA         30          10         20         0     NE   5
SANTA CRUZ           43          21         33        13      S   5

SYNOPSIS...LESS MORNING CLOUDINESS HAS LED TO AN EARLIER START
FOR THUNDERSTORMS. A LIGHT WIND FLOW ALOFT AND A RATHER MOIST
ATMOSPHERE WILL MAKE HEAVY RAIN AND FLASH FLOODING THE PRIMARY
CONCERNS THROUGH THE EVENING HOURS.
*****************************************************************
KEY...
AREAL COVERAGE - PERCENT OF COUNTY OR AREA THAT WILL EXPERIENCE
                 THUNDERSTORMS
PROB OF SEVERE - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
                 REACH SEVERE LEVELS (DAMAGING WIND AND/OR
                 LARGE HAIL)
RAIN GRTR THAN - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
                 PRODUCE RAIN EXCEEDING 1 INCH OR 2 INCHES IN
                 ANY LOCATION
STORM MOTION   - GENERAL DIRECTION TO WHICH THE STORMS WILL
                 LIKELY MOVE AND SPEED IN MPH

NOTE...PRODUCT IS NOT UPDATED.
VALID TIME IS FROM 10:45 AM TO 12 MIDNIGHT OF THE DAY OF ISSUANCE.
THIS PRODUCT IS NOT TO BE USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES. CORRESPONDING GRAPHICS MAY BE FOUND ON THE NWS
TUCSON INTERNET PAGE AT
HTTP://WWW.WRH.NOAA.GOV/TUCSON/THUNDER/SWO.SHTML

END/OKULSKI

NNNN

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.