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Fire Weather Threat Waning in Southern California; Early Season Winter Storm Impacting the Ohio/Mississippi Valleys and the East Coast States

Elevated to locally critical fire weather threats persist for southern California, before hopefully subsiding on Friday. An early winter storm is producing heavy snow from the Mid MS Valley through the OH Valley and Interior Northeast, potentially significant icing in the south-central Appalachians and heavy rain from the Southeast to Mid-Atlantic coast the next few days. Read More >

Hail and Wind Descriptors

Hail Diameter Description Hail Diameter Description
1/4" Pea Size 1 3/4" Golf Ball Size
1/2"   2" Hen Egg or Lime Size
3/4" Penny Size 2 1/2" Tennis Ball Size
7/8" Nickel Size 2 3/4" Baseball Size
(Severe Criteria)
Quarter Size 3" Teacup or Apple Size
1 1/4" Half Dollar Size 4" Grapefruit Size
1 1/2" Walnut or Ping Pong Ball Size 4 1/2" Softball Size


Wind Speed Estimate Description
25-31 mph Large branches in motion; whistling heard in telephone wires
32-38 mph Whole trees in motion; inconvenience felt walking against the wind
39-54 mph Twigs break off trees; wind generally impedes progress
55-72 mph
(58 mph=Severe Criteria)
Damage to chimneys and TV antennas; pushes over shallow rooted trees
73-112 mph Peels surfaces off roofs; windows broken; light mobile homes pushed or overturned; moving cars pushed off road
113-157 mph Roofs torn off houses; cars lifted off ground

Quick Links for Spotters

National Weather Service logo For further information concerning our spotter program at
National Weather Service Sioux Falls, please contact:
Peter Rogers, Warning Coordination Meteorologist.