1. Weekly Weather Briefing 08/04/2011 www.srh.noaa.gov/shv/briefing Matthew Duplantis Meteorologist National Weather Service Shreveport, Louisiana

2. Overview Today and Friday Today and Friday Forecast Highs today would break record highs at all major climatological sites in our area! Forecast Highs today would break record highs at all major climatological sites in our area! Excessive Heat Warning in effect through Friday evening Excessive Heat Warning in effect through Friday evening Heat Emergency continues through today for entire four state area… Heat Emergency continues through today for entire four state area… Weekend Weekend Extreme Heat continues…but temperatures will be relatively cooler than the end of this week. Extreme Heat continues…but temperatures will be relatively cooler than the end of this week. Very weak chances of precipitation… Very weak chances of precipitation… Monday through Wednesday Monday through Wednesday High pressure ridge shifts slightly west back into central Texas. High pressure ridge shifts slightly west back into central Texas. High temperatures slowly cooling back closer to 100 by the end of the period. High temperatures slowly cooling back closer to 100 by the end of the period. Very slight chances for precipitation… Very slight chances for precipitation… National Weather Service Shreveport, Louisiana

3. Currently Emily

4. Today (Thursday) Forecast Records

5. Friday Ridge remains centered over Arklatex Ridge remains centered over Arklatex Smothering heat continues… Smothering heat continues…

6. Friday Forecast Highs Friday Forecast Highs

7. Weekend Upper ridge shifts slightly to the west…back towards central Texas… Upper ridge shifts slightly to the west…back towards central Texas… Temperatures are relatively cooler than this week…but still very hot… Temperatures are relatively cooler than this week…but still very hot…

8. Forecast Precip Total for Next 5 Days Virtually NIL for the entire 4 state area… Virtually NIL for the entire 4 state area… No relief through the beginning of next week! No relief through the beginning of next week!

9. Wednesday Upper ridge shifts further west to west Texas… Upper ridge shifts further west to west Texas… Could see some increased chances for precipitation with weak northwest flow… Could see some increased chances for precipitation with weak northwest flow…

10. Tropics

11. Ongoing Drought Much of Northwest and North-central Louisiana remains under D3-D4 drought conditions. Much of Northwest and North-central Louisiana remains under D3-D4 drought conditions. Improvements in South LA are why numbers are improving. Improvements in South LA are why numbers are improving.

12. Ongoing Drought Much of east Texas along/south of I-20 under D3-D4 drought conditions. Much of east Texas along/south of I-20 under D3-D4 drought conditions.

13. Ongoing Drought All of Southern Arkansas under D2-D3 drought conditions. All of Southern Arkansas under D2-D3 drought conditions.

14. Temperature Outlook (1 Month) Not looking good…

15. Heat Facts 100 Degree Facts as of 08/04/2011 (contingent) 100 Degree Facts as of 08/04/2011 (contingent) 38 consecutive days of 100+ degrees in Tyler 38 consecutive days of 100+ degrees in Tyler 50 days of 100+ for Tyler this summer 50 days of 100+ for Tyler this summer 42 days of 100+ for Longview this summer 42 days of 100+ for Longview this summer 33 days of 100+ for Shreveport this summer 33 days of 100+ for Shreveport this summer All time records (F°) All time records (F°) Texarkana – 117 (08/10/1936) Texarkana – 117 (08/10/1936) Longview – 113 (08/10/1936) Longview – 113 (08/10/1936) El Dorado – 112 (08/10/1936, 08/31/2000) El Dorado – 112 (08/10/1936, 08/31/2000) Tyler – 111 (07/31/1921) ** Tyler – 111 (07/31/1921) ** Lufkin – 110 (08/19/1909, 09/04/2000) Lufkin – 110 (08/19/1909, 09/04/2000) Shreveport – 110 (08/18/1909) ** Shreveport – 110 (08/18/1909) ** Monroe – 108 (06/21/1931, 07/29/1930, 08/09/1935) ** Monroe – 108 (06/21/1931, 07/29/1930, 08/09/1935) ** ** Forecast today will come very close to these values ** ** Forecast today will come very close to these values **

16. Yesterday’s Records New Records set…some shattered… New Records set…some shattered… LOCATIONNEWOLDDIFFERENCE Longview110 (2011)105 (1937) +5 Shreveport109 (2011)104 (2008) +5 El Dorado108 (2011)104 (2008) +4 Texarkana111 (2011)108 (1896) +3 Tyler110 (2011)107 (1998) +3 Monroe107 (2011)105 (2010) +2 Lufkin106 (2011)105 (1998) +1

17. NEXT CONFERENCE CALL: Thursday Aug 11, 2011 10 AM www.srh.noaa.gov/shv/briefing National Weather Service Shreveport, Louisiana