Wednesday Daily Weather Summary

ONLINE DAILY WEATHER SUMMARY

Wednesday, 7 April 1999

UPPER AIR
TEMPERATURE EXTREMES IN THE LOWER 48
ALASKAN WEATHER
HAWAIIAN WEATHER
MONITORING EL NIÑO and LA NIÑA
HISTORICAL WEATHER EVENTS

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UPPER AIR -- The 500 mb chart for 00Z Wednesday ....

TEMPERATURE EXTREMES ACROSS THE LOWER 48 -- On Tuesday, the lowest temperature reported in the continental U.S. was XX degrees at XXX, while Tuesday's high was XX degrees at XXX.

ALASKAN WEATHER -- ....

As of Tuesday, the lowest overnight temperature in the state was XX degrees at XXX. By midafternoon, the highest temperature was XX degrees at XXX.

HAWAIIAN WEATHER -- .

MONITORING EL NIÑO and LA NIÑA -- Scientists have suggested that some of the abnormal weather patterns that have affected not only the United States, but other countries since the summer of 1997, are linked to an event called El Niño. More recently, a potential La Niña episode has appeared. (REPHRASE for what transpired over winter and early spring.) For more details on how to monitor these phenomena, please read the optional Supplemental Information for Wednesday.

HISTORICAL WEATHER EVENTS - 7 April

From the files of the Aviation Weather Center, Kansas City, MO and Intellicast

...1857...A late season freeze brought snow to every state in the Union. Even as far south as Houston, TX the mercury plunged to 21 degrees. (David Ludlum)
...1926...Lightning started a disastrous oil fire at San Luis Obispo, CA with lasted 5 days, spread over 900 acres, and burned nearly 6 million barrels of oil. Flames reached 1000 feet and the fire temperature was estimated at 2500 degrees. The fire spawned thousands of whirlwinds with hundreds the size of small tornadoes. One vortex traveled one mile to the east-northeast of the blaze, destroying a small farm house and killing 2 people. Damage totaled 15 million dollars. (Intellicast)
...1929...Record heat prevailed across New England. Hartford, CT reported an afternoon high of 90 degrees. (David Ludlum)
...1935...Amarillo, TX reported dust obscuring visibility for twenty hours. Blowing dust was reported twenty-seven of thirty days in the month. On several days the visibility was reduced to near zero by the dust. (The Weather Channel)
...1980...Severe thunderstorms spawned tornadoes which ripped through central Arkansas. The severe thunderstorms also produced high winds and baseball size hail. Five counties were declared disaster areas by President Carter. (The Weather Channel)
...1987... The fourth consecutive day of record high temperatures was recorded at International Falls, MN, with an afternoon high of 71 degrees, breaking the previous record for the day of 60 degrees, set in 1970. The 71 degree reading at International Falls was warmer than Miami, FL, where the high was a record cool 66 degrees. (The National Weather Summary) (Intellicast)
...1988...High winds in the Middle Atlantic Coast Region gusted to 172 mph atop Grandfather Mountain, NC. Twenty-nine cities in the southwest and north central U.S. reported record high temperatures for the date, including Yankton, SD with a reading of 91 degrees. (The National Weather Summary) (Storm Data)
...1989...Twenty-seven cities in the southwestern U.S. reported record high temperatures for the date. Afternoon highs of 92 degrees in Downtown San Francisco and 104 degrees at Phoenix, AZ established records for April. Highs of 78 degrees at Ely, NV and 93 degrees at San Jose, CA equaled April records. (The National Weather Summary)
...1990...Low pressure brought strong winds to the Alaska peninsula and the Aleutian Islands. Winds gusted to 68 mph at Port Heiden two days in a row. Unseasonably warm weather prevailed across central Alaska. Yakutat reported a record high of 54 degrees. Unseasonably cold weather prevailed over central sections of the Lower Forty-eight states. A dozen cities from Kansas to Indiana and Alabama reported record low temperatures for the date. Evansville, IN equaled their record for April with a morning low of 23 degrees. A spring winter storm occurred on this date with 3.3 inches of the white stuff falling in Atlantic City, NJ. This amount not only broke the daily record for snow but it was the most snowfall ever for a day in April for Atlantic City. 1.9 inches snow fell in Philadelphia, PA which also set a new daily snowfall record for this date.(The National Weather Summary) (Storm Data) (Intellicast)