Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 7, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jun 20, 2000, 1:14 PM MST for Maricopa County, Arizona. It was in force for 61 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 20, 2000, 1:14 PM MST (20:14 UTC)
- Expired
- Jun 20, 2000, 2:15 PM MST
- In force
- 61 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 20, 1:41 PM MST | Hail 0.88 | Phoenix, AZ | Large hail and heavy rain hit the Ahwatukee area. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 8.2 hours before the alert went out and 49 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.
- Mixed-layer CAPE
- 2346 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1314 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
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
980 WUUS55 KPSR 202015 SVRPHX AZC013-202115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 114 PM MST TUE JUN 20 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 215 PM MST * AT 110 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED POSSIBLE SEVERE THUNDERSTORMS OVER APACHE TRAIL EAST OF TORTILLA FLAT. STORMS WERE MOVING TOWARD THE NORTHWEST AT 10 MPH. * THE THUNDERSTORMS WILL AFFECT... APACHE TRAIL CANYON LAKE APACHE LAKE DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS DG
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 Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 10:05 AM MST, 3 hours 9 minutes earlier.
Area forecast discussion, Jun 20, 10:05 AM MST, 3 hours 9 minutes before
AZZ020>028-CAZ030>033-202245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 1005 AM MST TUE JUN 20 2000 .SYNOPSIS... MOISTURE-LADEN AIR FROM THE GULF OF CALIFORNIA AND FROM MEXICO HAS SPREAD OVER ALL OF SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA. A SLOW MOVING UPPER LEVEL DISTURBANCE WILL INTERACT WITH THE MOISTURE AND SUPPORT SCATTERED SHOWERS AND THUNDERSTORMS ACROSS SOUTH CENTRAL AND SOUTHWEST ARIZONA AT LEAST THROUGH WEDNESDAY...WITH ISOLATED STORMS POSSIBLE IN FAR SOUTHEAST CALIFORNIA AS WELL ON WEDNESDAY. LOCALLY HEAVY RAINFALL IS POSSIBLE WITH STORMS. .DISCUSSION... ACTIVE CONVECTIVE DAY ON TAP FOR MUCH OF SOUTH CENTRAL ARIZONA...WITH STORMS A GOOD BET THROUGH AT LEAST WEDNESDAY. POTENTIAL FOR CONVECTIVE STORMS HAS SPREAD FURTHER WEST THIS MORNING...WITH ISOLATED THUNDER MAINLY OVER SOUTHWEST MARICOPA COUNTY AS OF 945 AM. MID-LEVEL DEFORMATION EXISTS OVER EASTERN HALF OF CWA THIS MORNING...WITH MUCH LIGHTER WINDS AT 500 MB TODAY VS MONDAY. UPPER LEVEL JET STREAK MOVING SOUTH ALONG CENTRAL CALIFORNIA COAST IS SERVING TO BACK LOW LEVEL FLOW TO MORE OF A SOUTHERLY DIRECTION ...WHICH IS HELPING TO SHIFT MOISTURE/INSTABILITY AXIS WWD. CAPE AND PRECIPITABLE WATER STILL WELL ABOVE CLIMO OVER AZ PTN CWA...AND MOISTURE CONTINUES TO STREAM NORTH FROM THE GULF AND NORTHERN MEXICO. AT UPPER LEVELS...SPEED DIVERGENCE EXISTS BETWEEN TROF JUST WEST OF CWA AND JET STREAK OVER AND NORTHEAST OF COLORADO. VISIBLE IMAGERY AND PLOT DATA SUPPORTS PRESENCE OF LOW-MIDLEVEL DISTURBANCE OVER NORTHERN MEXICO MOVING NORTH. WIDESPREAD CONVECTIVE CLOUD AREA EXISTS OVER PIMA COUNTY...WITH ISOLATED EMBEDDED THUNDERSTORMS AS OF 17Z. TEMPERATURE DIFFERENTIAL BETWEEN CLOUDY CONVECTIVE AREA TO SOUTH AND MUCH OF SOUTHWEST AND SOUTH CENTRAL ARIZONA WILL INCREASE AS THE DAY WEARS ON...SO CONVECTIVE STORMS COULD BE MORE PRONOUNCED AT AND NEAR THE CLOUDY/PARTLY CLOUDY INTERFACE. HAVE GONE WITH SCATTERED TSTM WORDING FOR ALL MARICOPA AND NORTHERN PINAL COUNTIES TODAY...WITH ISOLATED OVER CENTRAL-EASTERN LA PAZ AND YUMA COUNTIES. DAYTIME TSTMS A GOOD BET WITH CONVECTIVE TEMPS ONLY IN THE MID 90S. LESS WIND IN LOW TO MIDDLE TROPOSPHERE...SO STORMS WILL BE SLOWER MOVING AND BE MORE LIKELY TO PRODUCE LOCALLY HEAVY RAINFALL. AS USUAL...STRONG WINDS ALSO A POSSIBILITY...WITH A WET MICROBURST OR TWO POSSIBLE. HAZARDOUS WEATHER OUTLOOK WILL FOCUS ON POTENTIAL FOR LOCAL HEAVY RAINFALL AND STRONG WINDS FROM THE STRONGEST STORMS TODAY...WITH PRIMARY THREAT AREA MARICOPA AND NORTHERN PINAL COUNTIES. CURRENT FORECAST CALLING FOR INCREASE IN STORM ACTIVITY FURTHER WEST TONIGHT AND WEDNESDAY LOOKS ON TARGET. PRIMARY CONCERN WILL BE WITH POTENTIAL FOR LOCALLY HEAVY RAIN. DG N
In the hours before
Special weather statement, Jun 20, 11:01 AM MST, 2 hours 13 minutes before
AZZ021>024-026>028-210000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1101 AM MST TUE JUN 20 2000 SLIGHT RISK FOR HAZARDOUS WEATHER OVER MARICOPA...NORTHERN PINAL ...SOUTHERN GILA...EASTERN LA PAZ...AND EASTERN YUMA COUNTIES TODAY AND TONIGHT... CITIES INCLUDED IN THE SLIGHT RISK AREA INCLUDE THE GREATER PHOENIX METROPOLITAN AREA...GILA BEND...WICKENBURG...CASA GRANDE... SUPERIOR...FLORENCE...COOLIDGE...APACHE JUNCTION...GLOBE...MIAMI... WENDEN...AND DATELAND. THE MOST LIKELY FORM OF HAZARDOUS WEATHER...OTHER THAN INTENSE CLOUD TO GROUND LIGHTNING...WILL BE LOCALLY HEAVY RAINFALL. STRONG... POSSIBLY DAMAGING...STRAIGHT LINE WINDS ARE ALSO POSSIBLE WITH THE MOST INTENSE STORMS. BLOWING DUST COULD BE A PROBLEM ESPECIALLY OVER DESERT LOCATIONS. THE ATMOSPHERE OVER SOUTHWEST AND SOUTH CENTRAL ARIZONA REMAINS VERY MOIST AND UNSTABLE. A WEAK UPPER DISTURBANCE WILL MOVE SLOWLY NORTH AND PROVIDE THE DYNAMIC SUPPORT FOR SCATTERED THUNDERSTORM DEVELOPMENT OVER THE SLIGHT RISK AREA. STORMS WILL BE SLOW MOVING SINCE STEERING FLOW IS LIGHT...BUT WILL GENERALLY MOVE FROM SOUTH TO NORTH. THE HAZARDOUS WEATHER OUTLOOK GIVES PRELIMINARY INFORMATION FOR THE POSSIBILITY OF WEATHER THAT COULD BECOME SEVERE...DAMAGING WINDS IN EXCESS OF 57 MPH...DENSE BLOWING DUST WITH VISIBILITY LESS THAN 1/4 MILE...HAIL 3/4 INCH IN DIAMETER OR LARGER...AND HEAVY RAINFALL THAT COULD CAUSE FLOODING OR RUNNING WASHES. WHEN SEVERE WEATHER OR FLOODING BEGINS...IMPORTANT LIFE SAVING INFORMATION WILL BE PROVIDED IN SHORT TERM FORECASTS...SEVERE WEATHER AND FLOOD WARNINGS...AND IN FOLLOW-UP STATEMENTS. STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY. DG
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 9:44 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 36 min |
| Jun 20, 12:34 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 61 min |
| Jun 20, 1:33 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 67 min |
| Jun 20, 3:09 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 61 min |
| Jun 20, 3:45 PM MST | Flash Flood Warning | PSR | Maricopa | 20 min |
| Jun 20, 4:05 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 75 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.