Weather Alerts for Marion CountyIssued by the National Weather Service |
RED FLAG WARNING | ||
MARION COUNTY | ||
Areas Affected: East Slopes of Central Oregon Cascades - Deschutes National Forest - minus Sisters Ranger District |
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Effective: Sat, 9/7 1:32pm | Updated: Sat, 9/7 8:35pm | Urgency: Expected |
Expires: Sat, 9/7 11:00pm | Severity: Severe | Certainty: Likely |
Details:
...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING ONCE AGAIN TONIGHT AND SUNDAY... .Unstable conditions will persist once again today, before an oncoming weather system shifts the threat from instability to that of thunderstorms. Clearing has been observed across central Oregon, and with that, scattered thunderstorms are expected to develop this evening. Storms are expected to develop over the eastern mountains tomorrow afternoon as well, however forecast confidence remains on the lower end, so will hold off on upgrading the watch there for now. The National Weather Service in Pendleton has issued a Red Flag Warning for abundant lightning, which is in effect until 11 PM PDT this evening. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades and 611 Deschutes National Forest -minus Sisters Ranger District. * TIMING...Now through Saturday evening. * RELATIVE HUMIDITY...As low as 15 percent. * TEMPERATURES...Up to 85. * IMPACTS...New fire starts, as well as rapid fire spread due to outflow winds. * ADDITIONAL INFORMATION...Isolated to scattered thunderstorms are forecast for this afternoon and evening that may also bring new starts to the area. * THUNDERSTORMS...Scattered thunderstorms producing abundant lightning and gusty outflow winds. Storms are expected to be dry in nature. * OUTFLOW WINDS...Storms may be capable of producing outflow winds up to and over 40 mph. Information: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. |