Alert archive / Oregon / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 18, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at Aug 5, 2003, 1:40 PM PDT for Deschutes County, Jefferson County, Oregon. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 5, 2003, 1:40 PM PDT (20:40 UTC)
- Expired
- Aug 5, 2003, 2:30 PM PDT
- In force
- 50 min
- Issued by
- NWS Pendleton, OR
- Area
- Counties, with a storm outline in the text
Counties Deschutes County, OR, Jefferson County, OR
The radar
The Portland,OR radar (KRTX), 212 km from the middle of the area, began a volume at 20:40 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
Salem/Mcnary, OR (KSLE), launched 12:00Z, 8.7 hours before the alert went out and 160 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
- 1301 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Aug 5, 9:30 AM PDT, 4 hours 10 minutes earlier.
Area forecast discussion, Aug 5, 9:30 AM PDT, 4 hours 10 minutes before
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</html>Hazardous weather outlook, Aug 5, 4:22 AM PDT, 9 hours 18 minutes before
ORZ041>050-WAZ024>030-061200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PENDLETON OR 422 AM PDT TUE AUG 5 2003 .DAY ONE...TODAY AN UPPER PACIFIC LOW PRESSURE SYSTEM WILL MOVE INTO A MOIST AND UNSTABLE AIR MASS OVER THE REGION TODAY AND TRIGGER WIDESPREAD THUNDERSTORMS ACROSS EASTERN OREGON AND SOUTHEAST WASHINGTON. SOME OF THESE STORMS MAY BECOME SEVERE WITH STRONG DAMAGING WINDS...LARGE HAIL...HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. .DAYS TWO THROUGH SEVEN... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. A MOIST SOUTHWEST FLOW PATTERN ALOFT WILL CONTINUE THROUGH THE PERIOD. HOWEVER THE ATMOSPHERE WILL BE MORE STABLE WITH LESS SHOWER AND THUNDERSTORM ACTIVITY EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE LIKELY. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. RSC
The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 5:29 PM PDT | Severe Thunderstorm Warning | PDT | Wasco | 61 min |
| Aug 4, 5:59 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 61 min |
| Aug 4, 6:12 PM PDT | Flash Flood Warning | PDT | Wasco | 2 hr |
| Aug 4, 6:44 PM PDT | Severe Thunderstorm Warning | PDT | Crook | 61 min |
| Aug 5, 1:12 PM PDT | Severe Thunderstorm Warning | PDT | Deschutes, Jefferson | 33 min |
| Aug 5, 2:25 PM PDT | Severe Thunderstorm Warning | PDT | Jefferson, Wasco, Wheeler | 50 min |
| Aug 5, 2:29 PM PDT | Severe Thunderstorm Warning | PDT | Jefferson, Wasco | 46 min |
| Aug 5, 2:38 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Morrow | 67 min |
| Aug 5, 3:14 PM PDT | Severe Thunderstorm Warning | PDT | Sherman, Wasco | 46 min |
| Aug 5, 3:14 PM PDT | Severe Thunderstorm Warning | PDT | Sherman, Wasco | 61 min |
| Aug 5, 3:41 PM PDT | Severe Thunderstorm Warning | PDT | Morrow | 49 min |
| Aug 5, 3:45 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Sherman | 60 min |
| Aug 5, 3:46 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Sherman | 59 min |
| Aug 5, 4:19 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 56 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 2003Every severe thunderstorm warning in 2003
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.