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Lower Mississippi River Forecast Center
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Home : Precipitation Forecasts
Flash Flood Guidance
Flash flood guidance is the amount of rainfall needed in a certain area in order for flooding to occur. These values change daily according to soil moisture, season of year, etc. Also, not all areas are included under each office, only the areas for which the LMRFC forecasts.
This is updated daily by 12:30 pm and 10:30 pm.

Graphical Flash Flood Guidance
arrowFlash Flood Guidance by COUNTY
- County FFG is calculated as an average by county
1 Hr FFG 3 Hr FFG 6 Hr FFG 12 Hr FFG 24 Hr FFG
1 hour ffg by county
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3 hour ffg by county
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6 hour ffg by county
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12 hour ffg by county
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24 hour ffg by county
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Flash Flood Guidance by GRID
- Gridded FFG is calculated on a 4x4 Km resolution
1 Hr FFG 3 Hr FFG 6 Hr FFG 12 Hr FFG 24 Hr FFG
1 hour ffg by grid
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3 hour ffg by grid
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6 hour ffg by grid
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12 hour ffg by grid
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24 hour ffg by grid
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Text Flash Flood Guidance
arrowAtlanta, GA
  arrowBlacksburg, VA
  arrowFort Worth, TX
  arrowGreenville/Spartanburg, SC
  arrowHuntsville, AL
  arrowJackson, MS
  arrowLake Charles, LA
  arrowLittle Rock, AR
  arrowMemphis, TN
  arrowMobile, AL
  arrowMorristown, TN
  arrowNashville, TN
  arrowNew Orleans/Baton Rouge, LA
  arrowPaducah, KY
  arrowShreveport. LA
  arrowSpringfield, MO
  arrowSt. Louis, MO
  arrowTulsa, OK