Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 15, NWS Tucson, AZ

June 23, 2000Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jun 23, 2000, 4:21 PM MST for Pima County, Arizona. It was in force for 39 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 23, 2000, 4:21 PM MST (23:21 UTC)
Expired: Jun 23, 2000, 5:00 PM MST
In force: 39 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), 10 km from the middle of the area, began a volume at 23:22 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, 11.4 hours before the alert went out and 34 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 409 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 1637 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

394 
WUUS55 KTWC 232322
SVRTUS
AZC019-240000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
421 PM MST FRI JUN 23 2000

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL PIMA COUNTY IN ARIZONA

* UNTIL 500 PM MST

* AT 420 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM OVER SOUTHEASTERN PIMA COUNTY...OR ABOUT 5 
  MILES EAST OF GREEN VALLEY...MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE OVER...
COUNTY ROAD 62 FROM CONTINENTAL TO MADERA CANYON 
AND OVER STATE HIGHWAY 83 BY 445 PM MST.

LAT...LON 3194 11090 3177 11093 3174 11046 3212 11047

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 23, 2:25 PM MST, 1 hour 56 minutes earlier.

Area forecast discussion, Jun 23, 2:25 PM MST, 1 hour 56 minutes before

SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
225 PM MST FRI JUN 23 2000

SYNOPSIS...MONSOON MOISTURE WILL REMAIN OVER SOUTHEAST ARIZONA THIS
WEEKEND AS THE CIRCULATION OF HURRICANE CARLOTTA MOVES NORTHWEST OFF
OF BAJA CALIFORNIA. THUS AFTERNOON AND EVENING THUNDERSTORMS WILL
CONTINUE WITH SOME STORM LIKELY PRODUCING BRIEF HEAVY DOWNPOURS.

DISCUSSION...SOME STRONG STORMS ALREADY THIS AFTERNOON WITH MAIN
THREAT FROM THEM BEING HEAVY RAIN AND HAIL WITH VERY MOIST AND
UNSTABLE ATMOSPHERE. EXCEPT FOR WEAK CIRCULATION NEAR FLAGSTAFF...
I CAN NOT FIND ANY UPPER AIR FEATURES THAT WILL HELP ACTIVITY TODAY
LIKE WE HAD ON THURSDAY. JUST DIURNALLY DRIVEN TODAY. HOWEVER CAN
NOT SAY THAT OVER NEXT SEVERAL DAYS AS WEAK UPPER LEVEL
DISTURBANCES ARE LIKELY TO MOVE INTO ARIZONA IN SOUTHWEST FLOW
ALOFT. CAN NOT BELIEVE MODELS IDEA OF DRYING THINGS OUT SINCE THEY
HAVE HAD A HORRENDOUS TIME LATELY WITH SMALL SCALE FEATURES. ALSO
THROWN INTO THE MIX WILL BE MOISTURE ASSOCIATED WITH WEAKENING HRCN
CARLOTTA. LIKELY WILL BE DAY TO DAY FLUCTUATIONS BUT THEY ARE ALMOST
IMPOSSIBLE TO FORECAST. WITH SUCH UNCERTAINTY I WILL KEEP STANDARD
MONSOON FORECAST THROUGH MIDDLE OF NEXT WEEK. GLUECK

.TWC...NONE.

In the hours before

Special weather statement, Jun 23, 10:45 AM MST, 5 hours 36 minutes before

AZZ019-029>035-240600-
HAZARDOUS WEATHER OUTLOOK...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1045 AM MST FRI JUN 23 2000

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

COCHISE              29          12         29         5      E  15
GRAHAM               23          11         21         4      E  15
GREENLEE             22          11         19         5      E  15
TUCSON/ERN PIMA      36          14         32         6      E  15
TOHONO OODHAM       36          15         32         6     NE  15
SOUTHEAST PINAL      29           9         20         4      E  15
WESTERN PIMA         24           9         18         4     NE  15
SANTA CRUZ           37          19         41         7      E  15

SYNOPSIS...HEAVY RAINFALL WILL BE LIMITED TO LOCATIONS SOUTH AND
EAST OF TUCSON THIS AFTERNOON WHERE HIGHER VALUES OF MONSOONAL
MOISTURE RESIDE. THUNDERSTORMS WILL HAVE TO RELY ON SURFACE HEATING
TO DEVELOP TODAY GIVEN THE ABSENCE OF ANY UPPER AIR DISTURBANCES.
THEREFORE...THUNDERSTORMS WILL BEGIN TO FORM OVER THE MOUNTAINS
AND MOVE EAST TO NORTHEAST AT 15 MPH INTO THE VALLEY LOCATIONS.
*****************************************************************
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/

NNNN

Local storm report, Jun 23, 2:09 PM MST, 2 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
209 PM MST FRI JUN 23 2000

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

200 PM     ORO VALLEY                AZ   1 INCH HAIL
06/23/00   Pima                           SEVERAL REPORTS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 1:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	35 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2000 Every 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.