Alert archive / Oregon / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 7, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at May 15, 2000, 5:11 PM PDT for Union County, Oregon. It was in force for 49 min. 2 reports 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
- May 15, 2000, 5:11 PM PDT (00:11 UTC)
- Expired
- May 15, 2000, 6:00 PM PDT
- In force
- 49 min
- Issued by
- NWS Pendleton, OR
- Area
- Whole counties
County Union County, OR
The radar
The Pendleton radar (KPDT), 78 km from the middle of the area, began a volume at 00:13 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 15, 5:14 PM PDT | Hail 0.75 | Elgin, OR | |
| May 15, 5:15 PM PDT | Hail 0.75 | Union, OR |
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
Boise Airport, ID (KBOI), launched 00:00Z, 0.2 hours before the alert went out and 241 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
- 162 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 2745 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KPDT 160011 SVRPDT ORC061-160100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PENDLETON OR 511 PM PDT MON MAY 15 2000 THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN UNION COUNTY IN NORTHEASTERN OREGON * UNTIL 600 PM PDT * AT 509 PM PDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES SOUTHEAST OF LAGRANDE OR 3 MILES SOUTHWEST OF UNION... MOVING SOUTHWEST AT 5 MPH. LARGE HAIL IS INDICATED WITH THIS STORM. THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS. THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS. DI/MJB
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 Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at May 15, 2:30 PM PDT, 2 hours 41 minutes earlier.
Area forecast discussion, May 15, 2:30 PM PDT, 2 hours 41 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 230 PM PDT MON MAY 15 2000 MAIN CONCERN IS EVENING THUNDERSTORMS. ATMOSPHERE UNSTABLE WITH LIFT INDEX NEAR -4...CAPE 800-1000 AND COOLING ALOFT WITH 500 MB TEMPS NEAR -22C. HOWEVER...MOISTURE CONVERGENCE CENTERED TO OUR SOUTH MAY LIMIT AVAILABLE MOISTURE AND UPPER JET HAS MOVED TO OUR EAST DECREASING UPPER LEVEL DYNAMICS. WEAK IMPULSES ROTATING AROUND UPPER LOW CURRENTLY CENTERED 38N/127W WILL HELP TRIGGER THUNDERSTORM DEVELOPMENT THROUGH THE EVENING. EXPECTED SLOW MOVEMENT OF STORMS MAY ALLOW FOR HIGHER PRECIPITATION AMOUNTS THAN WOULD NORMALLY BE EXPECTED. THUNDERSTORMS WILL DIE OUT WITH SUNDOWN. THEN...UPPER LOW WILL MOVE SLOWLY EASTWARD AND TRACK ACROSS CENTRAL CALIFORNIA TONIGHT...THEN NORTHEAST OVER NEVADA INTO SOUTHEAST IDAHO FOR TUEADAY. WRAP AROUND CLOUDS WILL AFFECT THE EASTERN PART OF THE FORECAST AREA ON TUESDAY WITH SOME LINGER SHOWERS POSSIBLE EXTREME EAST. RIDGING OVER THE WESTERN SECTION WILL PROVIDE DRY CONDITIONS. RIDGE TO DOMINATE WEATHER PATTERN ON WEDNESDAY THROUGHOUT AREA. EXTENDED...RIDGE WILL MAINTAIN CONTROL OVER REGION THROUGH FRIDAY WITH FLOW BECOMING MORE ZONAL ON SATURDAY. MINOR DISTURBANCE MOVING THROUGH UPPER FLOW WILL GENERATE OCCASIONAL CLOUDS BUT CONDITIONS TO REMAIN DRY THROUGH PERIOD. MJB. PDT 4100 ALW 4100 PSC 4100 YKM 4100 .KPDT...WSR-88D...VCP21/CSR21...OPERATIONAL. .KPDT...NONE.
The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 5:45 PM PDT | Severe Thunderstorm Warning | PDT | Wheeler | 65 min |
| May 15, 6:47 PM PDT | Severe Thunderstorm Warning | PDT | Wheeler | 48 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 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; radar from the NEXRAD Level II archive.