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1 Rain season: July 1st to June 30th.
2 Snow season July 1st to June 30th.
3 Snow manually measured |
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NWS Hourly Weather Graph For Chester, CA The Next 48 Hours
Meteogram courtesy of NOAA-National Weather Service
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Today's Weather Story
A cold low pressure system presently centered off the coast of Washington will move southeastward into Oregon later today and become stationary through the end of the week. The system will lead to cooler temperatures and locally breezy conditions across the interior of northern California through the remainder of the week. There will be a chance for a few showers across mainly the northern mountains and northern Sierra Nevada. Some warming will be possible by the upcoming Memorial Day holiday weekend, but temperatures will likely remain a little below normal.
Rivers and streams will be running fast and cold for the next several weeks. People in or near area lakes, rivers, and streams should remain cautious to the dangers of cold springtime waters. If exposed to cold waters, even experienced swimmers can lose muscle control very quickly, and any fast flowing water will make rescue difficult. At these temperatures, hypothermia is a threat to anybody caught in the water. Hypothermia is a condition in which the core temperature of a human body drops below the required temperature for normal metabolism and body functions. Symptoms of hypothermia include: shivering, cold hands and feet, numbness, loss of dexterity, mental sluggishness, and pain from cold. If you witness someone with any of these symptoms, find help immediately. The 2013 safe Boating Week Is May 18th - 24th. To Learn More, Click Here.
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More Severe Weather Expected from Great Lakes to Central Texas on Tuesday.
More severe weather is expected on Tuesday from the Great Lakes across the Mississippi River Valley and into central Texas. Primary threats will be very large hail, damaging winds and tornadoes. Some of the storms could also produce heavy rainfall leading to flash flooding concerns, especially in the Ark-La-Tex region.
...Widespread severe weather and heavy rainfall threat are expected along a slow-moving cold front migrating through the Nation's mid-section...
...Windy...cool and wet conditions are in the forecast for the pacific Northwest and northern Rockies...
...Scattered showers and thunderstorms will continue over Florida and up into the Mid-Atlantic region...
A cold front edging eastward through the Nation's mid-section will continue to be a big weather maker during the short range period. Anomalous amounts of moisture surging northward out of the Gulf...combined with strong dynamics aloft...should produce organized convection along and ahead of the slow-moving frontal boundary. Heavy rainfall may accompany the more intense showers and thunderstorms with severe weather expected from the Southern Plains to Upper Midwest/Upper Great Lakes. A moderate risk of severe storms will be located today and tonight for northeast Texas into the Ark-La-Tex and southern Ozarks. Please refer to the Storm Prediction Center for the latest information and updates for severe weather. Farther north...moisture wrapping around a slow-moving upper-level low anchored in the upper Mississippi Valley and a stationary front draped to the east of this low will be the focus for light to moderate rainfall and embedded thunderstorms from the northern Plains to the Great Lakes and into southern New England during the next few days.
A vigorous upper vortex settling in over the Pacific Northwest will slowly push a cold front inland through the West and northern Rockies. Moderate moisture...instability and cold air aloft will produce scattered showers and a few thunderstorms. Windy conditions along the front should enhance precipitation amounts along the windward slopes of the higher terrain. With conditions noticeably cooler behind the front...temperatures could briefly fall below freezing at elevation with the possibility of snow showers in the Washington and Oregon Cascades.
Across the East and southeast...weak energy aloft and warm advection should keep conditions ripe for scattered showers and thunderstorms over Florida and northward into the Mid-Atlantic states.
NOTE: The HPC National Forecast Map above, provides an overview of today’s national weather with an emphasis on certain hazardous and significant weather. It summarizes forecasts from several NCEP Service Centers including the Storm Prediction Center (for severe thunderstorm and tornado outlooks), the National Hurricane Center (for tropical storm and hurricane forecasts), and the Hydrometeorological Prediction Center (for information concerning heavy rainfall, flooding, winter weather, and general weather). With an overlaid frontal forecast, this display serves as a great overview of the weather for the current day! The National Forecast Map is prepared twice daily at the Hydrometeorological Prediction Center.
 Day One Severe Outlook |
 Day Two Severe Outlook |
 Day Three Severe Outlook |
U.S. Severe Weather Alerts MapNWS Weather And Hazards Data Viewer
| Weather History for May 21 |
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1860 - A swarm of tornadoes occurred in the Ohio Valley. Tornadoes struck the cities of Louisville, KY, Cincinnati, OH, Chillicothe, OH, and Marietta, OH, causing a million dollars damage. (David Ludlum) |
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1895 - The temperature at Norwalk, OH, dipped to 19 degrees to set a state record for the month of May. (The Weather Channel) |
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1896 - The mercury soared to 124 degrees at Salton, CA, to establish a U.S. record for May. (Sandra and TI Richard Sanders - 1987) |
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1980 - The temperature at Williston ND reached 102 degrees to set a record for May, and the next day the mercury hit 106 degrees. (The Weather Channel) |
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1987 - Severe thunderstorms, developing along a sharp cold front crossing the central U.S., produced 60 mph winds and golf ball size hail at Sedalia, MO, and drenched Hagerstown, IN, with six inches of rain in one hour. Temperatures soared into the 90s ahead of the cold front. Paducah, KY, hit 94 degrees for the second day in a row. Light snow blanketed Montana, with three inches reported at Butte. (The National Weather Summary) (Storm Data) |
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1988 - Severe thunderstorms swept across southern Louisiana during the morning hours spawning six tornadoes, and producing wind gusts to 88 mph at Jennings. Thunderstorms also produced five inches of rain in two hours at Lake Charles, causing local flooding. (The National Weather Summary) (Storm Data) |
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1989 - Thunderstorms moving southeastward across the Central Plains Region into Oklahoma and Arkansas produced severe weather through the day and night. Thunderstorms spawned just four tornadoes, but there were 243 reports of large hail and damaging winds. Baseball size hail was reported at Augusta, KS, and thunderstorm winds gusted to 98 mph at Johnson, KS. (The National Weather Summary) (Storm Data) |
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1990 - Thunderstorms produced severe weather across the southeastern U.S. for the second day in a row. Severe thunderstorms spawned five tornadoes, including one which injured a person at Richmond KY. There were eighty-seven reports of large hail or damaging winds, with hail three inches in diameter reported at Austin TX. Thunderstorms produced up to five inches of rain in Macon County GA, and heavy rains left nearly eight feet of water over roads near Stepstone KY. (The National Weather Summary) (Storm Data) |
| Information courtesy of weatherforyou.com |
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