National Weather Service United States Department of Commerce

There will be a threat for a couple strong to severe thunderstorms, mainly in the yellow-shaded area late Saturday afternoon and into the evening hours. Overall, any storm coverage is expected to be fairly LOW, but any storms that do form will have the potential to produce large hail (1-1.5" in diameter) and strong downburst winds in excess of 60 mph. This activity should diminish during the mid- evening hours, but another round of thunderstorms may develop north of I-20 near the Red River. These could become strong to marginally severe with a threat for hail up to 1" in diameter as well as locally heavy rainfall which could lead to some flooding.
The threat for severe storms will continue on Sunday afternoon and evening as a cold front/dryline move into the area. The severe threat will be contingent on several factors, however, such as the strength of the cap and how much cloud cover or shower activity is around in the morning. These are not well known at this time. If storms can develop, though, the environment would support a risk of large hail and damaging winds. While low, a tornado or two cannot be ruled out, mainly north of I-20 and east of I-35 during the late- afternoon and evening hours.
We will have two SKYWARN Basic Class on Monday, March 19th. One in Graham (Young County) from 7:00 pm to 9:00 pm and the second one in Copperas Cove (Coryell County) from 6:30 pm to 8:30 pm. Classes are free and registration is not required! We hope to see you there!

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100° Day Summary for Waco        Click Here for DFW

Average Number of 100° Days (1981-2010):
Waco - 100-Degree Days (1981-2010)

(March, April, and October have had 100° days,
but the average is near zero.)


First and Last Occurrences (1902-2016):
  • Average date of first 100°F: July 4
  • Average date of last 100°F: August 29
  • Earliest occurrence: Mar 28, 1971 (100°F)
  • Latest occurrence: Oct 4, 1983 (100°F)
  • Earliest last occurrence: Jul 8, 1931 (104°F)
  • Latest first occurrence: Oct 3, 1979 (101°F)
Most and Fewest:
  • Most in a calendar year: 90 (2011)
  • Fewest in a calendar year: 0 (1920, 1919)
  • Most consecutive: 44 (Jun 30 - Aug 12, 2011)
  • Most in a month: 31 (Jul 2011, Jul 1980)
  • Greatest number of months in a year with at least one occurrence: 5
    2011 - May, June, July, August, September
    1998 - May, June, July, August, September
    1985 - May, June, July, August, September
    1977 - June, July, August, September, October
    1963 - April, June, July, August, September
    1911 - May, June, July, August, September
  • Only month to record both 100°F and 32°F: Mar 1971 (29°F on the 3rd and 100°F on the 28th)