|April 7th 2007 Winter Event
A significant winter weather event with unseasonably cold temperatures affected west central Texas on Easter Weekend. Winter weather events seldom occur in this region during April. An unseasonably cold airmass developed across the northern Plains, Midwest and Great Lakes Regions on April 5th and 6th. A strong high pressure system dropped south from Canada, and pushed this cold air southward across the Plains states and into Texas (see Figure 1 below). Temperatures dropped into the 30 to 35 degree range across west-central Texas, by the early morning of Saturday, April 7th. The tempeatures held steady or slowly dropped a few degrees during the day Saturday, and remained in the upper 20s to lower 30s Saturday night.
To make matters worse, an upper level disturbance approached Texas from southern New Mexico, and interacted with the cold and moist air in the region (see Figure 2 Below). This brought a few rounds of mixed winter precipitation to the area. The precipitation was mostly in the form of snow across the Big Country. Farther to the south, a mix of sleet, snow and some freezing rain fell. The precipitation was heavy at times, especially when it was accompanied by scattered thunderstorms which moved east across the area. Thunder sleet was reported at San Angelo on Saturday and was accompanied by a heavy burst of sleet and snow.
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...SNOW FALL AMOUNTS FROM APRIL 7TH...
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Impacts of the Storm
Many other impacts may not be known for sometime. The area farmers are awaiting warmer weather to determine if area crops, such as Pecans and Wheat, will be damaged by the prolonged freezing temperatures.
Unseasonably Cold Temperatures
The record books for April had a workout over the Easter Weekend. The following is a Record Event Report with the unseasonably cold temperatures:
...A RECORD SETTING EASTER WEEKEND FOR WEST CENTRAL TEXAS... FOR ABILENE...THE HIGH TEMPERATURE OF 36 DEGREES ON THE 7TH WAS A RECORD LOW MAXIMUM TEMPERATURE FOR THAT DATE. THE PREVIOUS RECORD WAS 40 DEGREES SET IN 1958. IT ALSO ESTABLISHED A NEW RECORD FOR THE COLDEST MAXIMUM TEMPERATURE EVER RECORDED IN APRIL. THE PREVIOUS RECORD WAS 38 DEGREES SET ON APRIL 8 1938. THE LOW TEMPERATURE OF 28 DEGREES ON THE 7TH TIED THE RECORD LOW TEMPERATURE FOR THAT DATE...WHICH WAS PREVIOUSLY SET IN 1938. FOR SAN ANGELO...THE HIGH TEMPERATURE OF 38 DEGREES ON THE 7TH WAS A RECORD LOW MAXIMUM TEMPERATURE FOR THAT DATE. THE PREVIOUS RECORD WAS 56 DEGREES SET IN 1983. IT ALSO ESTABLISHED A NEW RECORD FOR THE COLDEST MAXIMUM TEMPERATURE EVER RECORDED IN APRIL. THE PREVIOUS RECORD WAS 39 DEGREES SET ON APRIL 13 1957. IN SAN ANGELO THE TEMPERATURE WAS 32 DEGREES OR BELOW FROM 5:30 AM SATURDAY UNTIL 10:30 AM SUNDAY. THIS WAS A TOTAL OF 29 HOURS AT OR BELOW FREEZING. PRIOR TO THIS WEEKEND THE LONGEST PERIOD OF TIME WITH TEMPERATURES AT OR BELOW FREEZING IN APRIL WAS 10 HOURS...FROM 1 AM TO 11 AM ON APRIL 13, 1957. THE LOW TEMPERATURE OF 29 DEGREES ON THE 7TH TIED THE RECORD LOW TEMPERATURE FOR THAT DATE...WHICH WAS PREVIOUSLY SET IN 1971. ON THE 8TH (EASTER SUNDAY)...THE HIGH TEMPERATURE OF 42 DEGREES IN SAN ANGELO WAS A RECORD LOW MAXIMUM TEMPERATURE FOR THAT DATE. THE PREVIOUS RECORD FOR THE 8TH WAS 50 DEGREES IN 1983.If you have pictures of this event and would like to help us document this event with pictures, please send pictures to firstname.lastname@example.org. Please tell us where the picture was taken and your name so that we can give the proper credit.
Event summarized by:
Matt Groh & Jonathan Brazzell