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January 2017 - Report and Summary

by Robert K. Peters, Ph.D. - National Weather Service Cooperating Observer

The month of January 2017 was much warmer and much wetter than normal. The thirty-day outlook for January 2017, issued on December 15, 2016, called for above normal temperatures and below normal precipitation. This outlook was not altered with the December 31 issuance. Compared with January 2016, the month was 5.8 deg. Warmer, and 5.33 inches wetter.

January began mild, with an upper air storm system crossing on the 2nd which brought between one-half inch and 1.5 inches of rain to the region in thunderstorms on the afternoon of the 2nd. This was followed by a Pacific cold front on the 3rd, and an Arctic front on the 5th. Temperatures lowered, with very cold temperatures from the evening of the 5th through the morning of the 8th. Light snow fell on the 6th.

Rapid warming began on the afternoon of the 9th, taking temperatures well above normal from the 10th through the morning of the 14th. A weak cold front went stationary along the IH-20 Corridor on the 14th, with showers ahead of the front on the 13th and along it on the morning of the 14th. Temperatures between the 10th and 13th ran 18-28 degrees above normal with record high temperatures on the 11th and 12th. The Arctic air mass behind the front of the 14th was very shallow with a pronounced temperature gradient in the region on the 14th. On that afternoon, the high in the Dallas-Fort Worth area was 44, 63 at Tyler Pounds Field, 68 in Tyler City, and 73 at Longview. The very warm weather was the result of persistent upper air low pressure from Southern California northeastward into the Great Lakes, and upper air high pressure over the Southeastern United States.

Temperatures continued running 10-18 degrees above normal through the 21st. Heavy rains fell between the 16th and 18th, with lighter showers commencing on the 13th. Between four and eight inches of rain fell in the area. The rain was the result of low pressure systems moving northeastward up the southeastern flank of the upper air trough. Additional showers fell on the evening of the 21st ahead of a Pacific cold front which brought temperatures back closer to normal values.

After an unseasonably warm day on the 24th, Arctic air arrived on the morning of the 25th with a reinforcing front on the 28th. This brought near to slightly below normal temperatures through the 29th, followed by warming through the 31st.

The reporting period for temperatures, precipitation, and phenomenon on each day is for the twenty-four hours ending at midnight hours GMT--6 p.m. CST and 7 p.m. CDT. All times are given using the twenty-four hour clock, and are expressed in Greenwich Mean Time. Effective April 1, 2012, the term "day" in the Records and Summary section refers to the clock day beginning at 0000 GMT, and ending at 2359 GMT. Observations are from NWS Station 41/9207/4 in Tyler, Texas. The term "normal" refers to averages from the standard climatic period 1981-2010.

January 2017

MX MN OBS PCPN REMARKS

January 2017, RECORDS AND SUMMARY:

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