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Home » SHV Home » Graphical
HWO » Explanation of Terms
| About
the Hazard Weather Outlook |
The Hazardous Weather Outlook (HWO) will be
issued daily, around 6 am and
noon.
Updates will be issued as needed.
The valid time for the Day One outlook is until
6 am the next day. The intent
of this product is to provide a graphical outlook
for possible hazardous weather in the four state
region covered by the forecast office in Shreveport.
Along with the graphical display, text describing
hazardous weather threats will be displayed. The
color key on the right side of each outlook describes
the color coding to be used in conveying a particular
hazardous weather threat.
|
| Day
One Outlook |
The Day One outlook is valid until 6
am the next day and consists of three
individual threat maps. The following are explanations
of each map:
Thunderstorms: The definition
of a severe thunderstorm is winds in excess of
58 miles an hour (50 knots), hail 3/4 inch (penny
size) or larger, or tornadoes.
Flash Flooding: Flash flooding
refers to rapid flooding after or during a heavy
rainfall or dam break event. Flash flooding can
occur in any low lying or poor drainage area,
as well as in small rivers and streams.
Winter Weather: The National
Weather Service issues a Winter Storm Warning
for 4 inches of snow or more, 1/4 inch or more
of freezing rain, or 1/2 inch or more of sleet
in 12 hours. Winter Weather Advisories are issued
for amounts below these values. |
| Days
2 through 7 Outlook |
| The Days Two through Seven outlook will be more
general than the Day One outlook and will be valid
the next day from 6 am until 1159
pm Day 7. The weather hazards are listed
in order of importance. If more than one hazard
is expected in a county or parish the most important
weather hazard is plotted. The text product will
include complete information on all hazards expected. |
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