Youtube video  Storm of the Century - the Blizzard of  49 Storm of the Century - the Blizzard of 49

1950 to 1959
Great Appalachian Storm of November 1950 November 24–30, 1950
March 1958 Noreaster blizzard March 18–21, 1958. The Mount Shasta California Snowstorm of 1959 – The storm dumped 189 inches (480 cm) of snow on Mount Shasta. The bulk of the snow fell on unpopulated mountainous areas, barely disrupting the residents of the Mount Shasta area. The amount of snow recorded is the largest snowfall from a single storm in North America. 1960 to 1969
March 1960 Noreaster blizzard March 2–5, 1960
December 1960 Noreaster blizzard December 12–14, 1960. Wind gusts up to 50 miles per hour (80 km/h). March 1962 Noreaster Great March Storm of 1962 – Ash Wednesday. North Carolina and Virginia blizzards. Struck during Spring high tide season and remained mostly stationary for almost 5 days causing significant damage along eastern coast, Assateague island was under water, and dumped 42 inches (110 cm) of snow in Virginia. North American blizzard of 1966 January 27–31, 1966
Chicago Blizzard of 1967 January 26–27, 1967
February 1969 noreaster February 8–10, 1969
March 1969 Noreaster blizzard March 9, 1969
December 1969 Noreaster blizzard December 25–28, 1969. 1970 to 1979
The Great Storm of 1975 known as the "Super Bowl Blizzard" or "Minnesotas Storm of the Century". January 9–12, 1975. Wind chills of −50 °F (−46 °C) to −80 °F (−62 °C) recorded, deep snowfalls. Groundhog Day gale of 1976 February 2, 1976
Buffalo Blizzard of 1977 January 28 – February 1, 1977.
An imperforate hymen is a congenital disorder where a hymen without an opening completely obstructs the vagina. It is caused by a failure of the hymen to perforate during fetal development. It is most often diagnosed in adolescent girls when menstrual blood accumulates in the vagina and sometimes also in the uterus. It is treated by surgical incision of the hymen. Signs and symptoms
Affected newborns may present with acute urinary retention. In adolescent females, the most common symptoms of an imperforate hymen are cyclic pelvic pain and amenorrhea; other symptoms associated with hematocolpos include urinary retention, constipation, low back pain, nausea, and diarrhea. Other vaginal anomalies can have similar symptoms to an imperforate hymen. Vaginal atresia and a transverse vaginal septum require differentiation. A strong urge to defecate has been observed in a few women. Complications
If untreated or unrecognized before puberty, an imperforate hymen can lead to peritonitis or endometriosis due to retrograde bleeding. Additionally, it can lead to mucometrocolpos (dilatation of the vaginal canal and uterus due to mucus buildup) or hematometrocolpos (dilatation due to buildup of menstrual fluid). Mucometrocolpos and hematocolpos can in turn cause urinary retention, constipation, and urinary tract infection. Pathophysiology
An imperforate hymen is formed during fetal development when the sinovaginal bulbs fail to canalize with the rest of the vagina. Although some instances of familial occurrence have been reported, the conditions occurrence is mostly sporadic, and no genetic markers or mutations have been linked to its cause.