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<br />26 <br /> <br />precipitating orographic cloud with CTTs of _15oC to -20oC persisted <br /> <br />more than 8 hours after frontal passage. A pocket of moisture near <br /> <br />80 kPa seen on the 1800 GMT Sheridan sounding may have accounted for <br /> <br /> <br />some of the Donner Summit precipitation peak around 1615 GMT, along <br /> <br /> <br />with increased convective instability as cold air intruded above the <br /> <br /> <br />station. <br /> <br />~ <br /> <br />r <br />