Mar 15, 2019 0100 UTC Day 1 Convective Outlook
Updated: Fri Mar 15 01:00:29 UTC 2019 (20190315 0100Z Day 1 shapefile | 20190315 0100Z Day 1 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20190315 0100 UTC Day 1 Outlook Graphic
Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 30,276 6,682,929 Columbus, OH...Montgomery, AL...Warren, MI...Sterling Heights, MI...Livonia, MI...
MARGINAL 114,069 20,714,937 Detroit, MI...Cleveland, OH...Atlanta, GA...Cincinnati, OH...Lexington-Fayette, KY...
Probabilistic Tornado Graphic
20190315 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 % 9,501 776,206 Prattville, AL...Anniston, AL...Carrollton, GA...Talladega, AL...Selma, AL...
2 % 39,925 5,108,050 Birmingham, AL...Montgomery, AL...Huntsville, AL...Tuscaloosa, AL...Hoover, AL...
Probabilistic Damaging Wind Graphic
20190315 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 % 29,826 6,648,187 Columbus, OH...Montgomery, AL...Warren, MI...Sterling Heights, MI...Livonia, MI...
5 % 114,078 20,640,991 Detroit, MI...Cleveland, OH...Atlanta, GA...Cincinnati, OH...Lexington-Fayette, KY...
Probabilistic Large Hail Graphic
20190315 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
15 % 10,296 844,287 Montgomery, AL...Prattville, AL...Anniston, AL...Talladega, AL...Selma, AL...
5 % 38,413 6,964,044 Atlanta, GA...Birmingham, AL...Huntsville, AL...Chattanooga, TN...Sandy Springs, GA...
   SPC AC 150100

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0800 PM CDT Thu Mar 14 2019

   Valid 150100Z - 151200Z

   ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS CENTRAL AL INTO
   NORTHWEST GA...NORTHERN KY INTO EASTERN OH...EXTREME EASTERN LOWER
   MI...

   ...SUMMARY...
   A severe thunderstorm threat will continue into tonight across
   portions of the Southeast, with a threat of damaging wind, isolated
   large hail, and perhaps a tornado or two. Further north, a damaging
   wind threat will persist through mid-evening over portions of far
   eastern Michigan, eastern Ohio, and northern Kentucky.

   ...Central/Eastern AL...Northwest GA...
   Three primary clusters of convection are ongoing at 0045Z across
   central/eastern AL into northwest GA. Gradual veering of low-level
   flow and the onset of nocturnal cooling will tend to reduce the
   severe threat across this area with time, but buoyancy and shear
   will be more than sufficient to maintain a threat of organized
   convection through much of the evening. Low-level shear will
   continue to support some tornado threat with the more discrete cells
   into mid-evening at least, while isolated instances of damaging wind
   and hail will remain possible. There is some potential for
   convection to redevelop along the primary cold front back into
   southeast MS/southwest AL later tonight, which would pose a marginal
   severe risk as it moves northeast. 

   ...Northern KY...Central/Eastern OH...
   A gradual weakening trend is expected to continue with convection
   moving across northern KY into central/eastern OH, as already
   limited buoyancy becomes even weaker as diurnal cooling commences.
   However, with very strong low-to-midlevel flow and favorable shear
   profiles in place, a localized threat for damaging wind and perhaps
   a brief tornado will continue with any stronger convection into at
   least mid-evening.  See MCD 218 for more information. 

   ...Eastern Lower MI...
   Very strong shear will continue to support a damaging wind threat
   across extreme eastern lower MI until around 02Z, before convection
   exits the region. See MCD 219 for more information.

   ..Dean.. 03/15/2019

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