Alert archive / California / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 17, NWS Reno, NV
NWS Reno, NV issued this severe thunderstorm warning at Jul 17, 2002, 2:37 PM PDT for Lassen County, Plumas County, California. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2002, 2:37 PM PDT (21:37 UTC)
- Expired
- Jul 17, 2002, 3:10 PM PDT
- In force
- 33 min
- Issued by
- NWS Reno, NV
- Area
- Counties, with a storm outline in the text
Counties Lassen County, CA, Plumas County, CA
The radar
The Reno radar (KRGX), 67 km from the middle of the area, began a volume at 21:38 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 9.6 hours before the alert went out and 177 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
- 2800 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
732 WUUS55 KREV 172137 SVRREV CAC035-063-172200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RENO NV 240 PM PDT WED JUL 17 2002 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME SOUTHEASTERN LASSEN COUNTY IN NORTHERN CALIFORNIA THIS INCLUDES THE CITY OF DOYLE SOUTHEASTERN PLUMAS COUNTY IN NORTHERN CALIFORNIA THIS INCLUDES THE CITY OF CHILCOOT * UNTIL 310 PM PDT * AT 235 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER VINTON...OR ABOUT 6 MILES WEST OF CHILCOOT...MOVING NORTH AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE... OVER FRENCHMAN LAKE AT 255 PM PDT 9 MILES SOUTHWEST OF DOYLE AT 300 PM PDT LARGE HAIL OVER ONE INCH IN DIAMETER IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. REPORT DAMAGING WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3976 12039 3969 12017 4000 11999 4008 12026
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 Reno, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 9:45 AM PDT, 4 hours 52 minutes earlier.
Area forecast discussion, Jul 17, 9:45 AM PDT, 4 hours 52 minutes before
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 945 AM PDT WED JUL 17 2002 WEAK UPPER LOW AND VORT MAX OFF CENTRAL CA CST NEAR SFO BAY AREA NOTED ON WATER VAPOR LOOP. THIS FEATURE FORECAST TO MOVE SLOWLY ENE NEXT 36 HOURS MOVING OVER WRN NV THU AFTN. MORNING SOUNDING AT REV A LITTLE MORE MOIST AND UNSTABLE WITH PRECIP WATER NEAR THREE QUARTERS OF AN INCH. TRIGGER TEMP FOR CONVECTION AROUND 81 DEG F AT 17Z WITH VIS LOOP SHOWING RAPID GROWTH OF CU ALONG MTNS. BEST FOCUSING FOR STRONGER TSTMS OVER MINERAL COUNTY WHERE CONVERGENCE/DIVERGENCE COUPLET FORECAST. WITH 15KT WINDS AT 700 MB CELL MOVEMENT SHOULD BE FAST ENOUGH KEEP FF POTENTIAL IN MODERATE RANGE. THETA-E RIDGE OVER E CENTRAL NV WITH NEG THETA-E ADVECTION FROM APPROACHING TROUGH. MICROBURST POTENTIAL ALSO MODERATE WITH LOWER CCL AND TEMPS DUE TO INCREASING CLOUDS AND MOISTURE. BETTER POTENTIAL FOR STRONGER AND WETTER TSTMS ON THURSDAY AS VORT MAX MOVES OVER AREA AND MOISTURE VALUES UP FROM TODAY CONVECTION. NO UPDATES. CYLKE .REV...NONE.
In the hours before
Local storm report, Jul 17, 2:35 PM PDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO, NV
735 AM PDT WED JUL 17 2002
TIME(PDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0143 PM 8 S INCLINE VILLAGE NV 1.00 INCH HAIL
07/17/02 DOUGLAS REPORTED BY GLENBROOK FIRE
DEPARTMENT
0149 PM 8 E BECKWOURTH CA .75 INCH HAIL
07/17/02 PLUMAS REPORTED BY SPOTTERS
0205 PM INCLINE VILLAGE NV 1.00 INCH HAIL
07/17/02 WASHOE REPORTED BY SPOTTERS
CJThe office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 1:53 PM PDT | Severe Thunderstorm Warning | REV | Lassen, Plumas | 22 min |
| Jul 17, 2:03 PM PDT | Severe Thunderstorm Warning | REV | Nevada, Placer, Sierra | 42 min |
| Jul 17, 3:01 PM PDT | Severe Thunderstorm Warning | REV | Lassen, Plumas, Sierra | 29 min |
Nearby
Severe Thunderstorm Warnings in California, 2002Every severe thunderstorm warning in 2002
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.