Aug 3, 2020 0600 UTC Day 2 Convective Outlook
Updated: Mon Aug 3 06:04:21 UTC 2020 (20200803 0600Z Day 2 shapefile | 20200803 0600Z Day 2 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20200803 0600 UTC Day 2 Outlook Graphic
Day 2 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 24,612 118,139 Sterling, CO...Fort Morgan, CO...Lamar, CO...
MARGINAL 151,008 38,089,786 New York, NY...Philadelphia, PA...Denver, CO...Virginia Beach, VA...Aurora, CO...
Probabilistic Tornado Graphic
20200803 0600 UTC Day 2 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 2 Tornado Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
2 % 58,527 35,883,925 New York, NY...Philadelphia, PA...Virginia Beach, VA...Newark, NJ...Norfolk, VA...
Probabilistic Damaging Wind Graphic
20200803 0600 UTC Day 2 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 2 Wind Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
15 % 24,644 118,161 Sterling, CO...Fort Morgan, CO...Lamar, CO...
5 % 151,281 38,705,372 New York, NY...Philadelphia, PA...Denver, CO...Virginia Beach, VA...Aurora, CO...
Probabilistic Large Hail Graphic
20200803 0600 UTC Day 2 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 2 Hail Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
15 % 24,453 117,604 Sterling, CO...Fort Morgan, CO...Lamar, CO...
5 % 93,050 2,363,028 Denver, CO...Aurora, CO...Fort Collins, CO...Thornton, CO...Centennial, CO...
   SPC AC 030604

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0104 AM CDT Mon Aug 03 2020

   Valid 041200Z - 051200Z

   ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
   THE NE PANHANDLE INTO EASTERN CO...

   ...SUMMARY...
   Some tornado threat will be possible from eastern North Carolina
   into southern New England Tuesday into Tuesday night, in association
   with Isaias. A few severe thunderstorms will also be possible across
   portions of the northern and central High Plains.

   ...Eastern NC into Southern New England...

   T.C Isaias is forecast to be centered over northeastern NC Tuesday
   morning. Forecast soundings continue to show low level shear
   increasing through the morning and into the afternoon from the
   Mid-Atlantic into southern New England, as the system tracks
   northeast with increasing forward speed through Wednesday morning.
   Low level shear will be favorable for rotation in cells developing
   over the Coastal Plain or moving inland in outer bands as low level
   hodographs become enlarged with northeast extent through peak
   heating. A couple of tornadoes will be possible with this activity,
   and an upgrade to Slight risk may be needed in subsequent outlooks
   as confidence in timing and track increases.

   ...Northern/Central High Plains...

   A weak shortwave impulse will migrate through northwesterly flow
   aloft during the afternoon/evening. Upslope southeasterly low level
   flow will transport mid 50s to near 60 F dewpoints westward across
   eastern CO into western NE/KS where strong heating will aid in
   moderate destabilization amid steep midlevel lapse rates. Forecast
   soundings indicate effective shear greater than 35 kt, resulting in
   organized, rotating updrafts. Meanwhile, inverted-v sub-cloud
   thermodynamic profiles indicate potential for strong downbursts. As
   storms move off of higher terrain near the I-25 corridor, a few
   severe storms capable of strong gusts and large hail are expected
   during the late afternoon and evening hours. Inhibition will
   increase with eastward extent, and convection is expected to
   gradually weaken as it tracks east/southeast toward the OK/TX
   Panhandle and western KS by late evening/overnight.

   ..Leitman.. 08/03/2020

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