21. It is common and characteristic of siliceous rock in interior valley and western mountains of California. 22. The Northwest will be dry and rather cool, with frost in the interior valleys on Wednesday morning. 23. Farther south, a period of ice is likely Friday night across the interior valleys of northern Pennsylvania. 24. Some showers will also dampen interior valleys . 25. There could be patches of freezing rain in the morning in some interior valleys of New England. 26. Only the interior valleys support natural vegetation. 27. For instance, those in interior valleys are hot in the summer, while those at higher elevations are cooler. 28. It is endemic to California, growing in interior valleys and foothills from Siskiyou County to San Diego County. 29. The Pacific states will be partly to mostly sunny, with areas of morning fog in some interior valleys . 30. Rain was falling, steady and heavy at times, over the interior valleys of Califorainia through the Los Angles Basin.
