AtticaFanatica Posted June 20, 2011 Share Posted June 20, 2011 2.7 I noticed the wording "THIS IS A PARTICULARLY DANGEROUS SITUATION" in some of your watches. What does this mean? What is the criteria for a PDS watch? The "particularly dangerous situation" wording is used in rare situations when long-lived, strong and violent tornadoes are possible. This enhanced wording may also accompany severe thunderstorm watches for exceptionally intense and well organized convective wind storms. PDS watches are issued, when in the opinion of the forecaster, the likelihood of significant events is boosted by very volatile atmospheric conditions. Usually this decision is based on a number of atmospheric clues and parameters, so the decision to issue a PDS watch is subjective. There is no hard threshold or criteria. In high risk outlooks PDS watches are issued most often. http://www.spc.noaa.gov/faq/#2.7 Link to comment Share on other sites More sharing options...
tornadotony Posted June 20, 2011 Share Posted June 20, 2011 2.7 I noticed the wording "THIS IS A PARTICULARLY DANGEROUS SITUATION" in some of your watches. What does this mean? What is the criteria for a PDS watch? The "particularly dangerous situation" wording is used in rare situations when long-lived, strong and violent tornadoes are possible. This enhanced wording may also accompany severe thunderstorm watches for exceptionally intense and well organized convective wind storms. PDS watches are issued, when in the opinion of the forecaster, the likelihood of significant events is boosted by very volatile atmospheric conditions. Usually this decision is based on a number of atmospheric clues and parameters, so the decision to issue a PDS watch is subjective. There is no hard threshold or criteria. In high risk outlooks PDS watches are issued most often. http://www.spc.noaa.gov/faq/#2.7 Ah, thanks. So they did away with the 2 EF2/1 EF4 guidelines. My apologies. Link to comment Share on other sites More sharing options...
Amped Posted June 20, 2011 Share Posted June 20, 2011 2.7 I noticed the wording "THIS IS A PARTICULARLY DANGEROUS SITUATION" in some of your watches. What does this mean? What is the criteria for a PDS watch? The "particularly dangerous situation" wording is used in rare situations when long-lived, strong and violent tornadoes are possible. This enhanced wording may also accompany severe thunderstorm watches for exceptionally intense and well organized convective wind storms. PDS watches are issued, when in the opinion of the forecaster, the likelihood of significant events is boosted by very volatile atmospheric conditions. Usually this decision is based on a number of atmospheric clues and parameters, so the decision to issue a PDS watch is subjective. There is no hard threshold or criteria. In high risk outlooks PDS watches are issued most often. http://www.spc.noaa.gov/faq/#2.7 I think they've handled this stuff well. If this was over Philly it would definitely need a PDS. Nebraska, maybe not so much but lets stop complaining and track some storms. Link to comment Share on other sites More sharing options...
Ian Posted June 20, 2011 Share Posted June 20, 2011 I think they've handled this stuff well. If this was over Philly it would definitely need a PDS. Nebraska, maybe not so much but lets stop complaining and track some storms. i dont think there's much question it was the right call Link to comment Share on other sites More sharing options...
Chicago Storm Posted June 20, 2011 Share Posted June 20, 2011 3 tors on the day thus far... Just passed Sean Casey and the TIV. Link to comment Share on other sites More sharing options...
nwohweather Posted June 20, 2011 Share Posted June 20, 2011 I think they've handled this stuff well. If this was over Philly it would definitely need a PDS. Nebraska, maybe not so much but lets stop complaining and track some storms. Ha it doesn't matter whether it's in Alaska or Nebraska...it's a particularly dangerous setup that could lead to possible strong tornadoes. An F3 is an F3 at the end of the day Link to comment Share on other sites More sharing options...
on_wx Posted June 20, 2011 Share Posted June 20, 2011 SJT has a really interesting warning template... STORM HAZARDS INCLUDE... WITH POSSIBLE STORM IMPACTS... Some of this really long impact list stuff is contradictory though...it talks about destroyed manufactured homes then later says roof damage to manufactured homes. It also mentions overturned vehicles...then a few items below...dented vehicles. Doesn't look effectively employed... A simple "this storm may cause extensive damage" would probably be just as good, or better Link to comment Share on other sites More sharing options...
Ian Posted June 21, 2011 Share Posted June 21, 2011 mike umscheid posted this: http://www.underthem...m/chasemode.php Large dusty tornado crossing hwy 283 north of hill city KS earlier today. Will post a few of the real pics late tonite. Link to comment Share on other sites More sharing options...
natecast Posted June 21, 2011 Share Posted June 21, 2011 mike umscheid posted this: http://www.underthem...m/chasemode.php Large dusty tornado crossing hwy 283 north of hill city KS earlier today. Will post a few of the real pics late tonite. Great shot! Towering CU trying to go west of my house. Radar echoes showing up now, we'll see if these remain discrete ahead of the developing squall line, if they maintain themselves at all. Link to comment Share on other sites More sharing options...
ICEHOCEY77 Posted June 21, 2011 Share Posted June 21, 2011 all those college world series fans in Omaha are about to have a rude awakening. Link to comment Share on other sites More sharing options...
TimChgo9 Posted June 21, 2011 Share Posted June 21, 2011 I wonder what to expect in this region on Tues/Wed.... Link to comment Share on other sites More sharing options...
Superstorm93 Posted June 21, 2011 Share Posted June 21, 2011 Beautiful line taking shape... Link to comment Share on other sites More sharing options...
Ian Posted June 21, 2011 Share Posted June 21, 2011 coming down the wire for okc.. discrete cell trying to the west Link to comment Share on other sites More sharing options...
Indystorm Posted June 21, 2011 Share Posted June 21, 2011 I wonder what to expect in this region on Tues/Wed.... First guess would be a MCS to come rolling through in the morning, then clearing and possible svr storms in the evening. Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 Look out Omaha. SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 758 PM CDT MON JUN 20 2011 IAC085-NEC025-053-055-131-153-155-177-210130- /O.CON.KOAX.SV.W.0173.000000T0000Z-110621T0130Z/ HARRISON IA-CASS NE-DODGE NE-DOUGLAS NE-OTOE NE-SARPY NE-SAUNDERS NE- WASHINGTON NE- 758 PM CDT MON JUN 20 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WASHINGTON... EASTERN SAUNDERS...SARPY...NORTH CENTRAL OTOE...DOUGLAS... SOUTHEASTERN DODGE...CASS AND SOUTHWESTERN HARRISON COUNTIES UNTIL 830 PM CDT... AT 756 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE HURRICANE FORCE WINDS OF 75 MPH OR HIGHER. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM INGLEWOOD TO 6 MILES SOUTHEAST OF LOUISVILLE...MOVING NORTHEAST AT 40 MPH. SPOTTERS ESTIMATED 75 MPH WINDS AT VENICE ALONG HIGHWAY 92. THIS IS A DANGEROUS STORM. TAKE COVER NOW! LOCATIONS IMPACTED INCLUDE... OMAHA...VALLEY...CEDAR CREEK...SPRINGFIELD...MURRAY...WATERLOO... ELKHORN...MILLARD...ARLINGTON...PLATTSMOUTH...PAPILLION...LA VISTA...RALSTON...OFFUTT AFB...BELLEVUE...KENNARD...COUNCIL BLUFFS...BLAIR...FORT CALHOUN AND CHALCO. Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 Siding blown off a house west of Omaha. Link to comment Share on other sites More sharing options...
outflow Posted June 21, 2011 Share Posted June 21, 2011 SJT has a really interesting warning template... AT 621 PM CDT... THE MOST DANGEROUS PART OF THE STORM WAS LOCATED NEAR AND JUST NORTH OF WOODSON...OR 15 MILES SOUTHEAST OF THROCKMORTON...MOVING EAST AT 30 MPH. A TORNADO COULD DEVELOP QUICKLY FROM THIS STORM. STORM HAZARDS INCLUDE... DANGEROUS TORNADIC WINDS. LARGE DAMAGING HAIL UP TO TENNIS BALL SIZE. HAIL DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. WITH POSSIBLE STORM IMPACTS... OVERTURNED VEHICLES... DAMAGE TO TREES...SOME MAY BE UPROOTED... DAMAGE TO HOMES...MAY DESTROY MANUFACTURED HOMES... DENTED VEHICLES... MODERATE ROOF DAMAGE... MAY BREAK WINDOWS ON VEHICLES AND HOMES MAY INJURE PEOPLE...PETS...AND LIVESTOCK LEFT UNPROTECTED... SIGNIFICANT DAMAGE TO TREE LIMBS... SOME TREES MAY BE BLOWN DOWN... SHEDS TOPPLED... ROOF DAMAGE TO MANUFACTURED HOMES... EXTENSIVE POWER OUTAGES... Some of this really long impact list stuff is contradictory though...it talks about destroyed manufactured homes then later says roof damage to manufactured homes. It also mentions overturned vehicles...then a few items below...dented vehicles. Doesn't look effectively employed... its listing the max impact of each hazard. the first three are from the possible tornado, the next 4 are from hail, and next 5 from straight line winds. Link to comment Share on other sites More sharing options...
ICEHOCEY77 Posted June 21, 2011 Share Posted June 21, 2011 Sirens going off in Omaha. CWS people are freaking out. Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 College World Series just stopped the game, sirens going off. Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 77 kt pixels showing up at 452 feet AGL near Fremont, NE. Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 Insane shelf cloud just shown on ESPN2. SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 808 PM CDT MON JUN 20 2011 IAC085-NEC025-053-055-131-153-155-177-210130- /O.CON.KOAX.SV.W.0173.000000T0000Z-110621T0130Z/ HARRISON IA-CASS NE-DODGE NE-DOUGLAS NE-OTOE NE-SARPY NE-SAUNDERS NE- WASHINGTON NE- 808 PM CDT MON JUN 20 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WASHINGTON... NORTHEASTERN SAUNDERS...SARPY...NORTH CENTRAL OTOE...DOUGLAS... SOUTHEASTERN DODGE...CASS AND SOUTHWESTERN HARRISON COUNTIES UNTIL 830 PM CDT... AT 805 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE HURRICANE FORCE WINDS OF 75 MPH OR HIGHER. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM ARLINGTON TO PLATTSMOUTH...MOVING NORTHEAST AT 45 MPH. WINDS WERE MEASURED AT 73 MPH AS IT PASSED THE NATIONAL WEATHER SERVICE IN VALLEY AT 759 PM. THIS IS A VERY DANGEROUS LINE OF STORMS. TAKE COVER IMMEDIATELY! LOCATIONS IMPACTED INCLUDE... OMAHA...OFFUTT AFB...KENNARD...BELLEVUE...COUNCIL BLUFFS...BLAIR... FORT CALHOUN...BENNINGTON AND DESOTO BEND NATIONAL WILDLIFE REFUGE. Link to comment Share on other sites More sharing options...
Bryan Wood Posted June 21, 2011 Share Posted June 21, 2011 Beautiful shelf cloud shown on ESPN2 from the CWS in Omaha! Link to comment Share on other sites More sharing options...
RobertSul Posted June 21, 2011 Share Posted June 21, 2011 Beautiful shelf cloud shown on ESPN2 from the CWS in Omaha! Is there a link online where I can see this live? Link to comment Share on other sites More sharing options...
Ian Posted June 21, 2011 Share Posted June 21, 2011 that area near mccook neb has had a lot of tornadoes nearby since yesterday Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 A lot of structural damage being reported on this feed. Semi's overturned, roofs off, etc. http://www.radioreference.com/apps/audio/?action=wp&feedId=674 Link to comment Share on other sites More sharing options...
Jonbo Posted June 21, 2011 Share Posted June 21, 2011 Is there a link online where I can see this live? Found a few pics on twitter Second picture is absolutely beautiful. Makes me wish I still lived in Council Bluffs to see this coming. Link to comment Share on other sites More sharing options...
SmokeEater Posted June 21, 2011 Share Posted June 21, 2011 Big area of 90 mph winds at least, near Kennard, north of Omaha. Link to comment Share on other sites More sharing options...
Bryan Wood Posted June 21, 2011 Share Posted June 21, 2011 Is there a link online where I can see this live? Depending on your IP, ESPN3.com has it. However, they have since cut to Sportscenter and aren't live in Omaha. I'd imagine you may be able to see it on ESPNNEWS when they show highlights of the Florida/Vanderbilt game. Link to comment Share on other sites More sharing options...
Stebo Posted June 21, 2011 Share Posted June 21, 2011 Big area of 90 mph winds at least, near Kennard, north of Omaha. BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 816 PM CDT MON JUN 20 2011 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HARRISON COUNTY IN SOUTHWEST IOWA... SOUTHEASTERN MONONA COUNTY IN WEST CENTRAL IOWA... POTTAWATTAMIE COUNTY IN SOUTHWEST IOWA... SOUTHWESTERN SHELBY COUNTY IN SOUTHWEST IOWA... SOUTHERN BURT COUNTY IN EAST CENTRAL NEBRASKA... NORTHEASTERN DODGE COUNTY IN EAST CENTRAL NEBRASKA... DOUGLAS COUNTY IN EAST CENTRAL NEBRASKA... WASHINGTON COUNTY IN EAST CENTRAL NEBRASKA... * UNTIL 900 PM CDT * AT 815 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE HURRICANE FORCE WINDS OF 75 MPH OR HIGHER. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 10 MILES SOUTH OF CRAIG TO COUNCIL BLUFFS...AND MOVING NORTHEAST AT 50 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS. * LOCATIONS IMPACTED INCLUDE... OMAHA...BLAIR...COUNCIL BLUFFS...FORT CALHOUN...CRAIG...TEKAMAH... TREYNOR...MODALE...MISSOURI VALLEY...MONDAMIN...UNDERWOOD... MACEDONIA...CARSON...LOGAN...OAKLAND...PISGAH...MINDEN...PERSIA... SHELBY AND MOORHEAD. Link to comment Share on other sites More sharing options...
natecast Posted June 21, 2011 Share Posted June 21, 2011 Nickel size hail in OKC! PDS BABY!! Link to comment Share on other sites More sharing options...
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