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Weekly Weather Briefing 12/29/2011 srh.noaa/shv/briefing

Weekly Weather Briefing 12/29/2011 www.srh.noaa.gov/shv/briefing. Keith Stellman Warning Coordination Meteorologist. National Weather Service Shreveport, Louisiana. Overview. Today Fog through the AM will burn off this afternoon Sunny – temps in the low-mid 60s Weekend

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Weekly Weather Briefing 12/29/2011 srh.noaa/shv/briefing

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  1. Weekly Weather Briefing12/29/2011www.srh.noaa.gov/shv/briefing Keith Stellman Warning Coordination Meteorologist National Weather Service Shreveport, Louisiana

  2. Overview Today Fog through the AM will burn off this afternoon Sunny – temps in the low-mid 60s Weekend Pleasant – Sunny temps 60-70, lows 40-50 Sunday through early Tuesday Dry Cold front moves through Sunday Arctic High builds in behind Highs fall back into the lower 50s Lows in the upper 20s – low 30’s Tuesday will be the coldest AM. National Weather Service Shreveport, Louisiana

  3. Current Weather – Big Picture L Dry Northwest Flow in the upper levels H L

  4. Advection Fog Advection Fog 5:45 AM 3:45 AM 1:45 AM 9:15 AM Strong Low Level Inversion Fog will stick around through the AM 8:00 AM

  5. Fog Visibilities • SHV - 1/16 • TYR - ¼ • GGG - ½ • LFK – ¼ • OCH - <1/4 • JSO - <1/4 • ELD – 1/4

  6. Today’s Highs

  7. Pattern on Saturday • Surface high shifts south east. • Southerly flow returns • Next upper system approaches L

  8. Pattern on Sunday • Arctic Front moves through • North/northeast winds • Colder air works in • Front likely dry with only a slight chance of a shower L H

  9. Pattern on Monday • Arctic High moves in overhead • Calm winds Monday night • Allows for maximized radiational cooling L H

  10. Cold Tuesday AM • Arctic High pressure builds in. • Radiational cooling • Temperatures potentially colder

  11. Pattern from Mon. through Wed. • More La Nina like pattern setting up • Dry northwest flow • Slightly below normal temps H

  12. Rainfall for December • 1st above normal month this year (for most areas) • SHV - 7.88” (+3.50) • MLU – 8.87” (+4.06) • TXK – 5.68” (+1.00) • ELD – 9.38” (+4.68) • TYR – 5.73” (+1.89) • GGG – 6.26” (+2.13) • DEQ – 3.83” (-0.01) Light Blue – 150-200% of normal Dark Blue 200-300% of normal

  13. Ongoing Drought Some lowering in LA Deep East TX still D3/D4

  14. Rainfall needed to end droughtover next 6 months • Normal rainfall from December – May • 26.98” (SHV) • 23.17” (TYR) • Area needs 30” – 35” • 125% -150% of normal

  15. NEXT CONFERENCE CALL: www.srh.noaa.gov/shv/briefing Weekly Webinar Thursday, January 5 @ 10 AM National Weather Service Shreveport, Louisiana

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