Alert archive / California / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 8, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 6, 2001, 2:48 PM PDT for Riverside County, California. It was in force for 42 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
- Jul 6, 2001, 2:48 PM PDT (21:48 UTC)
- Expired
- Jul 6, 2001, 3:30 PM PDT
- In force
- 42 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Riverside County, CA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 3:10 PM PDT | Thunderstorm Wind 60 E | Blythe, CA | Winds blew down 16 power poles in Blythe and caused severe damage to a mobile home. |
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
San Diego, CA (KNKX), launched 12:00Z, 9.8 hours before the alert went out and 154 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 837 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KPSR 062150 SVRPHX CAC065-062230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 248 PM PDT FRI JUL 6 2001 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN RIVERSIDE COUNTY IN SOUTHEAST CALIFORNIA * UNTIL 330 PM PDT * AT 247 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTHEAST OF PALO VERDE...OR ABOUT 20 MILES SOUTH-SOUTHWEST OF BLYTHE...MOVING NORTH AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RIPLEY AT 300 PM PDT BLYTHE AT 310 PM PDT THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILLm RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN PHOENIX.
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 Jul 6, 10:05 AM PDT, 4 hours 43 minutes earlier.
Area forecast discussion, Jul 6, 10:05 AM PDT, 4 hours 43 minutes before
AZZ020>028-CAZ030>033-062245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 1005 AM MST FRI JUL 6 2001 .SYNOPSIS... A WEAK LOW PRESSURE SYSTEM MOVING NORTH ACROSS THE BAJA PENNISULA WILL ENHANCE A SOUTHERLY FLOW OF MOIST AIR ACROSS ARIZONA TODAY. THIS WILL LEAD TO ANOTHER ROUND OF AFTERNOON AND EVENING THUNDER STORMS...PARTICULARLY OVER NORTHERN AND SOUTHEASTERN ARIZONA. THE BAJA CALIFORNIA LOW PRESSURE SYSTEM IS FOREACAST TO WEAKEN TONIGHT AS IT MOVES INTO CALIFORNIA...SPREADING DRIER AIR INTO SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA SATURDAY AFTERNOON AND EVENING. A STRONG MONSOON FLOW ALOFT FROM MEXICO WILL BECOME MORE ESTABLISHED AGAIN SUNDAY THROUGH EARLY NEXT WEEK...RESULTING IN AN INCREASE IN AFTERNOON AND EVENING THUNDERSTORM ACTIVITY STATEWIDE. .DISCUSSION... MID LEVEL VORT MAX INITIALIZED BY ALL MODELS DOWN INVOF KOLS AT 12Z EXPECTED TO MOVE NWWD TODAY. STRONG MID LEVEL DRYING NOTED ON VIS SATELLITE IMAGERY TO REAR OF THIS FEATURE PROBABLY ALSO ASSOCIATED WITH SOME SUBSIDENCE. SO...AREAS TO S OF CURRENT CLOUD BAND LIKELY TO SEE A DOWNER CONVECTIVE AFTERNOON...ESPECIALLY IN LIGHT OF NO REAL LARGE SCALE TRIGGER. MEANWHILE...FURTHER TO N IN CWFA...SOME UPPER LEVEL DIFFLUENCE SERVING TO ALLOW WHAT STORMS THAT DO FORM TO GET PRETTY TALL...AT TIMES PEAKING AT AROUND 50K. RADAR ESTIMATED STORM TOTALS OF OVER 2 INCHES IN A COUPLE OF SPOTS...AND WITH SOME TRAINING...WE DECIDED TO GO WITH SMALL STREAM FLOOD ADVISORY FOR WRN MARICOPA COUNTY W OF PHX UNTIL 11 AM. THIS STILL LOOKING GOOD... THOUGH IF ACTION CONTINUES WILL HAVE TO EXTEND THIS ADVISORY BOTH IN TEMPORAL AND AREAL COVERAGE. ZONES OVERALL IN OKAY SHAPE...THOUGH WILL HAVE TO UPDATE FOR FIRST PERIOD TRENDS. MEANWHILE...TOMORROW STILL LOOKS LIKE A DOWNER DAY WITH DRIER MID LEVEL AIR AND NO GOOD TRIGGERING MECHANISM. THIS CURRENTLY IN FORECASTS. ESTLE
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 3:35 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 40 min |
Nearby
Severe Thunderstorm Warnings in California, 2001Every severe thunderstorm warning in 2001
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.