McIDAS User's Guide
Version 2017.2

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WWDISP

Displays active weather warnings, watches and advisories.


Format

WWDISP map frame [keywords]


Parameters

map

map to display; use any predefined map in the MAP command, for example, USA, MID, KS (default=no map is drawn, use frame navigation)

frame

frame number to display the output (default=current)


Keywords

COLor=

tor svr toroutl svroutl winst winstoutl winwx bliz blizoutl fldwarn fldwatch
graphics color levels for output (default=2 3 5 4 14 10 11 7 8 6 9 for sessions with nine or more graphics color levels; 2 3 5 4 6 2 4 7 8 6 1 for sessions with eight or less graphics color levels)

 

 

tor

color of tornado watch outlines and warnings fill

 

 

svr

color of severe thunderstorm watch outlines and warnings fill

 

 

toroutl

color of county outlines drawn for tornado warnings

 

 

svroutl

color of county outlines drawn for severe thunderstorm warnings

 

 

winst

color of winter storm watch outlines and warnings fill

 

 

winstoutl

color of zone outlines drawn for winter storm warnings

 

 

winwx

color of zone outlines drawn for winter weather advisories

 

 

bliz

color of blizzard watch outlines and warnings fill

 

 

blizoutl

color of zone outlines drawn for blizzard warnings

 

 

fldwarn

color of flood/flash flood warning outlines and fill

 

 

fldwatch

color of flood/flash flood watch outlines and fill

DAY=

bday eday

day range of active bulletins to plot (default=current bday)

FILl=

type of shading for counties and National Weather Service zones under warnings; uses the colors specified for svr, tor, win and bliz with the COLOR keyword; use one of the following options

 

NONE

use no fill

 

SOLID

fill completely with a solid color (default)

 

TRAN density

fill partially to give a transparent effect; density range is 2-10; larger values give a greater transparent effect, for example, a value of 5 fills every fifth pixel (density default=4)

GROup=

ADDE group to search; the group name must be mapped with the DATALOC command to a server with weather text data (default=RTWXTEXT)

NAV=

frame to use for navigation; specify a frame number or C for current frame; cannot be used with the map parameter (default=C)

PLOt=

BOX

plot severe thunderstorm and tornado watches as box outlines

 

COUNTY

plot severe thunderstorm and tornado watches as county outlines

 

NBOX height

plot severe thunderstorm and tornado watches as box outlines with the watch number in center of each box using the specified pixel height (default=NBOX 7)

TIMe=

btime etime

time range of active bulletins to plot (default=current btime)

TYPe=

t1 . . tn
bulletin types to plot; valid types are listed below; you cannot use TYPE with the WATCH keyword

 

BLIZWARN

blizzard warnings

 

BLIZWATCH

blizzard watches

 

FLOODWARN

flood/flash flood warnings

 

FLOODWATCH

flood/flash flood watches

 

SEVWARN

severe thunderstorm warnings

 

SEVWATCH

severe thunderstorm watches

 

SNOWADV

snow advisories

 

TORWARN

tornado warnings

 

TORWATCH

tornado watches

 

WINADV

winter weather advisories

 

WINWARN

winter storm warnings

 

WINWATCH

winter storm watches

 

ALL (default)

 

WATch=

num1 . . numn

severe thunderstorm and tornado watch numbers to plot; watches are plotted only if they are active during the time period specified with the DAY and TIME keywords; you cannot use WATCH with the TYPE keyword (default=all active watches during time period specified with DAY and TIME)

WIDth=

width

graphics line width for county outlines and watch boxes (default=current GD command setting)

WList=

YES

display the watch list in the upper-left corner of the frame; the list includes the watch number, the day of month, and the time it expires (default)

 

NO

do not display the watch list


Remarks

If both watches and warnings are active, the watches are plotted before the warnings, regardless of which were issued first. The map is drawn after all the watches and warnings are plotted.

Severe thunderstorm and tornado watches are drawn as either a box or county outlines. If you use PLOT=NBOX (the default), the watch number is plotted in the center of each box. The number begins with a T, indicating tornado, or an S, indicating severe thunderstorm. Winter storm warnings are always plotted as zone outlines.

Watches are outlined in the tor, svr and win colors specified with the COLOR keyword. Counties and zones under a warning are filled with the tor, svr, win and bliz colors using the shading specified with the FILL keyword, and are outlined with the toroutl, svroutl, winoutl and blizoutl colors specified in the COLOR keyword. Flood/flash flood watches and warnings, and winter weather advisories are filled with the fldwatch, fldwarn and winwx colors in a hatch pattern unless FILL=NONE is specified.

If you specify a range with the DAY and TIME keywords, any bulletins active during the range are plotted. For example, DAY=185 187 TIME=21 3 specifies a window from 21:00 UTC on day 185 through 03:00 UTC on day 187. If you specify a single day and time, bulletins active at that day and time are plotted. The default is the current day and time.

Canceled severe thunderstorm and tornado watches are considered expired and are not displayed. Canceled warnings and winter storm watches are displayed until the original expiration time has passed.

The National Weather Service redefined winter weather bulletins beginning 09 September 2008 (NWS SCN08-40) such that Snow Advisories (TYPE=SNOWADV) are no longer issued; Winter Weather Advisories (TYPE=WINADV) were expanded to include snow, blowing snow, and sleet; and Winter Storm Warnings (TYPE=WINWARN) were expanded to include heavy snow and sleet. The TYPE=SNOWADV option was left in this command so it's valid when using archive data.


Examples

WWDISP

This entry plots all active severe thunderstorm watches and warnings, tornado watches and warnings, winter storm watches and warnings, flood/flash flood watches and warnings, blizzard watches and warnings, and winter weather advisories on the current frame. No map is drawn; the current frame's navigation is used.

WWDISP USA 4 TYPE=TORWATCH TORWARN

This entry plots all active tornado watches and warnings on a map of the United States on frame 4.

WWDISP TX COLOR=5 4 6 6 TYPE=SEVWATCH SEVWARN TORWATCH TORWARN

This entry plots all active severe thunderstorm and tornado watches and warnings on a map of Texas on the current frame. The tornado watches and warnings are plotted in graphics color level 5. The severe thunderstorm watches and warnings are plotted in graphics color level 4. The outlines of counties with warnings are displayed in graphics color level 6.

WWDISP MID WATCH=490 492 PLOT=COUNTY

This entry plots severe thunderstorm or tornado watches 490, 491 and 492 as county outlines on a map of the Midwest. The watches are plotted only if they are currently active. If they are no longer active, you must use the DAY and TIME keywords to specify the day and time when they were active.

WWDISP USA DAY=2015115 2015119 TIME=0 23:59

This entry plots all severe thunderstorm watches and warnings, tornado watches and warnings, winter storm watches and warnings, flood/flash flood watches and warnings, blizzard watches and warnings, and winter weather advisories that were active on days 2015115 through 2015119 on a map of the United States.

IMGDISP GOES8/VIS BAND=1 STA=KBUF REFRESH='MAP VH'
WWDISP NAV=C DAY=1998361 TIME=18 23:59 TYPE=WINWARN BLIZZARD FILL=TRAN 6

The first entry displays the most recent image in dataset GOES8/VIS on the current frame with Buffalo, New York, at the center, and includes a high-resolution map. The second entry uses the image's navigation to plot all winter storm and blizzard warnings active between 18 and 23:59 UTC on day 1998361. Every sixth pixel in the zones under a warning is filled, producing a transparent effect that allows most of the satellite image to be seen.


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