Jan2019Highlights

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1 Climate and Weather January 2019 Summary for emperatures in averaged slightly above normal at Abilene and San Angelo . Precipitation was T January at both locations. normal 2019 temperature, precipitation, and January Table 1 summarizes below m normal for Abilene and San Angelo. departure fro Departure Normal Departure Normal Average Total January from Average from Temperature Site Precipitation Normal Temperature Precipitation Normal (In.) (°F) (In) (°F) (In.) (°F) 46 . 2 ° 1 . 3 Abilene 4 4 . 9 ° 0 . 86 ” - 0.16 ” 1 . 02 ” ° San - . 4 ° 1 . 0 ° 46 . 4 ° 0 . 32 ” 47 0.61 ” 0 . 93 ” Angelo Climate Data for Abilene and San Angelo. Table 1: January Additional temperature and precipitation data for Abilene and San Angelo is summarized in Table 2. Maximum Daily est Low Warmest High d l Co Warmest Low est High d Col Temperature Temperature Temperature Site Precipitation Temperature (°F) (°F) (°F) (In.) (°F) 2 ° on Jan. 18 50 ° on Jan. Abilene 30 ° on Jan. 78 2 4 ° Jan. 25, 29 0 . 52 ” on Jan. 1 1 7 San 11 7 9 ° on Jan. 18 52 ° on Jan. 11 32 ° on Jan . 2 20 ° on Jan. 29 0 . 23 ” on Jan. Angelo 2 : Additional January Climate Data for Abilene and San Angelo. Table  In January, no snowfall was recorded at San Angelo. Abilene recorded 0.1 inches of sleet on Jan. 3.  No daily record high or low temperatures were set during the month at Abilene and San Angelo  No daily record precipitation amounts were set during the month at Abilene and San An gelo A Map of January is shown in Figure 1 (below) . total precipitation for

2 on for January Figure 1: Total Precipitati . January recipitation for varied from slightly above to below normal (not The monthly precipitation p shown). : Weather Highlights Temperatures were much colder on New Year’s Day, following passage of a strong cold front during the preceding night. With the gradual approach of an upper level storm system from the southwestern and temperatures below freezing states Icy , freezing drizzle and light freezing rain occurred on Jan. 2. patches developed on area roadways, and numerous traffic accid ents were reported in the Abilene and San Angelo areas. Some light freezing rain and sleet occurred in the Big Country on the early morning of Jan. 3. As the upper level storm system move east across northwestern Texas into the Red River Valley, scattere However, little or no snow accumulation d snow showers occurred across the Big Country. occurred. A more tranquil weather pattern followed Jan. 4 - 7 with much warmer temperatures. Daily highs were in th on the 9 , following a dry cold frontal passage the upper 60s and lower 70s. Temperatures were cooler th on the 8 . With a n increase in moisture and the arrival of a weak upper level disturbance, light rain showers occurred Jan. 10 across central and southern parts of west - central Texas . Rainfall amounts va ried mostly under one quarter of an inch. With the approach of a stronger upper level disturbance from the

3 west, a band of showers and isolated thunderstorms moved slowly east across west - central Texas on th , a band of sh Jan. 11. On the evening of the 11 owers and thunderstorms with brief heavy rain moved . Rainfall amounts for Jan. 11 are shown Big Country and northern Concho Valley east across parts of the in Figure below. 2 2 : Precipitation for the 24 - hour period ending at 6 AM, Figure . Jan. 12 The he avier rainfall (between one quarter and three quarters of an inch, with isolated higher totals) occurred in a northeast to southwest band (dark blue and green shading across the area). - central Texas Jan. 13 - 14. Wi th daytime cloud cover, highs were A colder airmass settled south into west th of the area on the 13 . Highs limited to the upper 30s to lower 40s across northern and central parts th . were in the 40s on the 14 A dry and quiet weather pattern followed Jan. 15 - res. Patchy 17, with a warming trend in temperatu dense fog, with visibilities of one quarter of a mile or less, affected southern parts of the area along the th Interstate 10 corridor, on the early morning of the 17 . th th into th Fairly strong, gusty winds occurred from the afternoon of the 18 . e daytime hours of the 19 These gusty winds were in association with a deepening upper level trough and fairly strong cold front which moved through the area . West - southwest winds shifted to northwest with passage of the cold front. The strongest win ds occurred on the evening of Jan. 18 across northern and central parts of west - central Texas, prior to the cold frontal passage. Table 3 (below) shows where recorded peak gusts were 40 mph or higher.

4 Peak Wind Gust (mph) Location 52 Abilene (Airport) Clyde 51 53 Fort Chadbourne 54 Haskell Mertzon 43 W) 56 Rotan (5 San Angelo (Airport) 45 San Angelo (7 NW) 40 Stamford (5 ESE) 55 48 Sterling City (4 WSW) Sweetwater (11 SW) 52 42 Wall Weinert 48 Table 3: Peak Wind Gusts on January 18. I n the hours following the cold frontal passage (post Midnight hours of Jan. 19), peak wind gusts were - - central Texas. Scattered showers - 40 45 mph across much of the northern and central parts of west - central Texas. Rainfall amounts occurred across mainly the Big Country and southeastern parts of west th well were less than three tenths of an inch. above normal highs in the 70s on the 18 After , - th temperatures were much cooler on the 19 . Gusty winds occurred again on Jan. 21 - 22, and peak gusts were in t he 35 - 45 mph range across much of st nd . Following a and much of the day on the 22 west central Texas. Winds were from the south on the 21 - cold frontal passage during the late afternoon and evening hours, winds were from the north. Most of the last week o f January was dry, with a couple of cold frontal passages. Scattered showers (associated with an upper level disturbance) occurred on the night of Jan. 26, across eastern and northern parts of west central Texas. Scattered locations southeast of San Ange lo into the Northwest - Hill Country received one - half to 1.5 inches of rainfall. Elsewhere, the amounts varied under one - half inch.

5 Gusty north winds followed a cold frontal passage on Jan. 28. The stronger winds occurred across the e peak gusts were over 40 mph. The highest gusts were recorded at Mesonet Big Country area, wher sites 11 miles west of Sweetwater (54 mph) and 5 miles west of Rotan ( 52 mph ). Additional Tabular and Graphical Daily Clima te Data

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