Feb 15, 2017 0100 UTC Day 1 Convective Outlook
Updated: Wed Feb 15 00:59:14 UTC 2017 (20170215 0100Z Day 1 shapefile | 20170215 0100Z Day 1 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20170215 0100 UTC Day 1 Outlook Graphic
Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 27,677 4,067,804 New Orleans, LA...Baton Rouge, LA...Mobile, AL...Metairie, LA...Gulfport, MS...
MARGINAL 35,623 1,981,441 Lafayette, LA...Dothan, AL...Hattiesburg, MS...Panama City, FL...New Iberia, LA...
Probabilistic Tornado Graphic
20170215 0100 UTC Day 1 Tornado Probabilities Graphic
Probability of a tornado within 25 miles of a point.
Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.
Day 1 Tornado Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
5 % 27,672 4,072,277 New Orleans, LA...Baton Rouge, LA...Mobile, AL...Metairie, LA...Gulfport, MS...
2 % 35,810 1,953,741 Lafayette, LA...Dothan, AL...Hattiesburg, MS...Panama City, FL...New Iberia, LA...
Probabilistic Damaging Wind Graphic
20170215 0100 UTC Day 1 Damaging Wind Probabilities Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point.
Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
15 % 26,996 4,016,577 New Orleans, LA...Baton Rouge, LA...Mobile, AL...Metairie, LA...Gulfport, MS...
5 % 36,856 2,034,736 Lafayette, LA...Dothan, AL...Hattiesburg, MS...Panama City, FL...New Iberia, LA...
Probabilistic Large Hail Graphic
20170215 0100 UTC Day 1 Large Hail Probabilities Graphic
Probability of hail 1" or larger within 25 miles of a point.
Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
5 % 18,446 2,584,274 New Orleans, LA...Metairie, LA...Gulfport, MS...Kenner, LA...Pensacola, FL...
   SPC AC 150059

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0659 PM CST Tue Feb 14 2017

   Valid 150100Z - 151200Z

   ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ALONG THE CENTRAL
   GULF COAST...

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
   THE GULF STATES...

   ...SUMMARY...
   Isolated severe thunderstorms remain possible tonight across
   southern Louisiana extending eastward along the Gulf coast.

   ...Gulf Coast...

   Narrow, shallow band of near-surface based convection, with embedded
   lightning, has developed along the cold front over LA.  A narrow
   wedge of modified Gulf air has returned northward across the lower
   MS valley in the wake of stronger convection over the north central
   Gulf.  00z soundings from this region do not sample this corridor of
   somewhat higher instability that extends across south central LA
   into southwest MS.  Even so, buoyancy is not that great and aside
   from an isolated severe wind gust it appears organized severe
   thunderstorms may struggle to develop well inland ahead of expected
   surface low track.

   Farther south along the Gulf coast...southwest-northeast oriented
   corridor of convection is shifting east along the LA coast.  This
   activity has temporarily impeded the northward advance of higher
   theta-e air.  However, large-scale forcing for ascent should
   overspread this region later tonight as heights are suppressed and
   deep-layer shear increases.  Severe threat should increase near the
   Gulf coast later tonight if sufficient buoyancy can develop for
   robust sustained updrafts.

   ..Darrow.. 02/15/2017

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   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z