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> April 13-16 Plains/MW/OV/GL Severe Weather, SPC Risk Level: Day 1 Moderate Risk - Forecasts & OBS
locomusic01
post Apr 13 2012, 05:42 PM
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QUOTE(East Dubzz @ Apr 13 2012, 06:34 PM) *
Can someone explain to me what I should be looking for when you post the velocity stuff?






The first is from March 2 and the second from earlier this afternoon. See the bright red and green colors right next to each other? Those are high inbound and outbound velocities in virtually the same location, which indicates strong rotation. It's not always a guarantee that a tornado is in progress, but it's a good indication.
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USA Weather
post Apr 13 2012, 05:43 PM
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QUOTE(East Dubzz @ Apr 13 2012, 05:34 PM) *
Can someone explain to me what I should be looking for when you post the velocity stuff?

Velocity data is very useful in determining the wind patterns in the storms. Obviously if you know how to read these maps it can be a very good tool to see rotating wind patterns in storms. Basically, green colors are winds moving towards the radar, while red colors are winds moving away from the radar. So, you are looking for "couplets", or red colors touching green colors. I like to especially look for couplets with counterclockwise rotation since the vast majority of tornados are spinning counterclockwise.


--------------------
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WeatherMonger
post Apr 13 2012, 05:44 PM
Post #183




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QUOTE
MESOSCALE DISCUSSION 0511
NWS STORM PREDICTION CENTER NORMAN OK
0540 PM CDT FRI APR 13 2012

AREAS AFFECTED...SE KS AND PORTIONS OF SW AND W CNTRL MO

CONCERNING...SEVERE THUNDERSTORM WATCH 161...

VALID 132240Z - 132345Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 161
CONTINUES.

TORNADO POTENTIAL IS INCREASING LATE THIS AFTERNOON ACROSS ERN
PORTIONS OF WW 161 MAY NEED AN UPGRADE TO A TORNADO WATCH.
CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED.

AS LOW LEVEL SHEAR INCREASES ACROSS SERN KS INTO SW/W-CNTRL
MO...SUPERCELL THUNDERSTORMS HAVE SHOWN SIGNS OF STRONGER ROTATION
OVER THE LAST HALF HOUR OR SO. IN FACT...WSR-88D VAD WIND PROFILES
FROM KINX SHOW LARGE LOW LEVEL HODOGRAPHS FAVORABLE FOR LOW LEVEL
ROTATION. AS THE LLJ CONTINUES TO STRENGTHEN THIS EVENING ACROSS THE
MOIST/UNSTABLE WARM SECTOR...THE TORNADO THREAT MAY INCREASE FOR
SEVERAL HOURS INTO THE MID EVENING HOURS. THIS AREA WILL CONTINUE TO
BE MONITORED.

..LEITMAN.. 04/13/2012


ATTN...WFO...SGF...EAX...TOP...ICT...

LAT...LON 37089705 38659585 38899503 38919445 38819393 38299367
37459371 37029375 37009455 37089705

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WolfSpider
post Apr 13 2012, 05:52 PM
Post #184




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QUOTE(The Snowman @ Apr 13 2012, 04:04 PM) *
FWIW, since the popular thing now seems to be sharing outlooks, here's mine.

This is the type of system that amateur chasers will be all over. That's just the opposite of what should be happening, considering the severity of this event... makes me very nervous...

I've also made a map; hopefully everyone stays safe tomorrow.

http://www.centraluswxcenter.com/2012/04/1...sible-tomorrow/


--------------------
My Weather Blog: http://usweather50.com
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WeatherMonger
post Apr 13 2012, 06:09 PM
Post #185




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QUOTE
MESOSCALE DISCUSSION 0512
NWS STORM PREDICTION CENTER NORMAN OK
0547 PM CDT FRI APR 13 2012

AREAS AFFECTED...MUCH OF WESTERN/CENTRAL/NORTHEAST OK

CONCERNING...TORNADO WATCH 160...

VALID 132247Z - 140015Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 160 CONTINUES.

TORNADO WATCH 160 CONTINUES UNTIL 02Z. LARGE HAIL ASIDE...TORNADO
POTENTIAL MAY FURTHER INCREASE THROUGH SUNSET...ESPECIALLY ACROSS
SOUTHWEST/WEST-CENTRAL OK. WW 160 ADJACENT PORTIONS OF NORTHWEST
TX/EASTERN TX PANHANDLE ARE BEING MONITORED FOR AN ADDITIONAL WATCH
THIS EVENING.

SUPERCELLS CONTINUE TO DEVELOP/SPLIT OVER THE PAST FEW HOURS ACROSS
SOUTHWEST OK INTO MUCH OF CENTRAL OK...WITH LONGER-LIVED/SEVERE
PRODUCING EAST-NORTHEASTWARD MOVING RIGHT-MOVING SUPERCELLS. WITHIN
A CORRIDOR OF MODERATE INSTABILITY /1500-2500 J PER KG
MLCAPE/...VERY FAVORABLE WIND PROFILES WILL CONTINUE TO SUPPORT
LONG-LIVED SUPERCELLS CAPABLE OF LARGE HAIL/TORNADOES WITHIN THIS
SAME CORRIDOR...WITH A NORTHWARD EXPANSION INTO ADDITIONAL PORTIONS
OF WESTERN/NORTHERN OK AND PERHAPS ADJACENT NORTHWEST TX AS A LOW
LEVEL JET INCREASES AND FRONTAL BOUNDARY/DRYLINE AND ASSOCIATED
MOIST SECTOR RETREATS. REGARDING THE TORNADO THREAT...THE
AFOREMENTIONED SOUTHERLY LOW LEVEL JET IS EXPECTED TO STRENGTHEN
ESPECIALLY TOWARD/AFTER SUNSET. THIS LLJ INCREASE...COUPLED WITH A
MORE DISCRETE INITIATION/LONG-LIVED SUPERCELLULAR MODE AND MODIFYING
OUTFLOW-AIDED TRIPLE POINT...MAY LEAD TO A HEIGHTENED TORNADO THREAT
ESPECIALLY ACROSS SOUTHWEST/WEST-CENTRAL OK. THIS INCLUDES THE
POTENTIAL FOR A STRONG TORNADO.

..GUYER.. 04/13/2012


ATTN...WFO...TSA...OUN...LUB...AMA...

LAT...LON 34250016 34860023 36939732 36559509 35489574 35069711
34039882 34250016
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WeatherMonger
post Apr 13 2012, 06:14 PM
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QUOTE
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
612 PM CDT FRI APR 13 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  KIOWA COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME NORTHEASTERN JACKSON COUNTY IN SOUTHWESTERN OKLAHOMA...

* UNTIL 645 PM CDT

* AT 611 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS 
  DANGEROUS STORM WAS LOCATED NEAR BLAIR...MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLAIR...MOUNTAIN PARK...ROOSEVELT...WARREN AND TOM STEED RESERVOIR. 
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WeatherMonger
post Apr 13 2012, 06:22 PM
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Photobucket app not cooperating

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WeatherMonger
post Apr 13 2012, 06:24 PM
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Wrapping up, wow

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WeatherMonger
post Apr 13 2012, 06:29 PM
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Is the proximity of Frederick radar skewing things?

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WeatherMonger
post Apr 13 2012, 06:32 PM
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QUOTE
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
629 PM CDT FRI APR 13 2012

OKC065-075-132345-
/O.CON.KOUN.TO.W.0011.000000T0000Z-120413T2345Z/
KIOWA OK-JACKSON OK-
629 PM CDT FRI APR 13 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR KIOWA 
AND EXTREME NORTHEASTERN JACKSON COUNTIES...

AT 625 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS 
STORM WAS LOCATED NEAR WARREN...MOVING EAST AT 20 MPH. 

LOCATIONS IMPACTED INCLUDE...
MOUNTAIN PARK...ROOSEVELT...WARREN AND TOM STEED RESERVOIR. 
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subigo
post Apr 13 2012, 06:33 PM
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East Dubzz
post Apr 13 2012, 06:37 PM
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Thanks to everyone for answering my question! I really appreciate that and understand it more now as well.

Do you guys have a place where I can zoom further in on the velocity? I'm looking at the NWS's radar, but that's too far out.

This post has been edited by East Dubzz: Apr 13 2012, 06:43 PM
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USA Weather
post Apr 13 2012, 06:48 PM
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QUOTE(East Dubzz @ Apr 13 2012, 06:37 PM) *
Thanks to everyone for answering my question! I really appreciate that and understand it more now as well.

Do you guys have a place where I can zoom further in on the velocity? I'm looking at the NWS's radar, but that's too far out.

Go to the radar site you want on the NWS. Then, choose the product you want on the sidebar. Instead of clicking it directly though, click the "loop" link. Then you just click on the radar image to zoom in. If you don't want the looping, you can just click pause. Also, you can buy certain radar software packages such as those made by Gibson Ridge if you want sharper images. I believe Wunderground also lets you zoom in.

This post has been edited by USA Weather: Apr 13 2012, 06:49 PM


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shotgun7
post Apr 13 2012, 06:49 PM
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If you click on the NWS Radar it will zoom in with each left click.... just click on the area you want to take a closer look at....
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WeatherMonger
post Apr 13 2012, 06:51 PM
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Another powerful storm heading in Normans direction

QUOTE
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
646 PM CDT FRI APR 13 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN COMANCHE COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME SOUTHEASTERN GREER COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME NORTHEASTERN JACKSON COUNTY IN SOUTHWESTERN OKLAHOMA...
  KIOWA COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME SOUTHEASTERN WASHITA COUNTY IN WEST CENTRAL OKLAHOMA...

* UNTIL 745 PM CDT

* AT 644 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP 
  TO GOLF BALL SIZE AND DESTRUCTIVE WINDS IN EXCESS OF 75 MPH. THIS 
  STORM WAS LOCATED NEAR WARREN...MOVING EAST AT 25 MPH. 


* LOCATIONS IMPACTED INCLUDE...
  MOUNTAIN VIEW...ROOSEVELT...GOTEBO...COOPERTON...
  WARREN AND TOM STEED RESERVOIR. 

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East Dubzz
post Apr 13 2012, 06:57 PM
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Thanks again guys (or girls)!
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WeatherMonger
post Apr 13 2012, 07:31 PM
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QUOTE
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
728 PM CDT FRI APR 13 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTHWESTERN COMANCHE COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME EAST CENTRAL KIOWA COUNTY IN SOUTHWESTERN OKLAHOMA...

* UNTIL 800 PM CDT

* AT 726 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS 
  DANGEROUS STORM WAS LOCATED NEAR COOPERTON...MOVING EAST AT 15 
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  COOPERTON.
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WeatherMonger
post Apr 13 2012, 07:32 PM
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WeatherMonger
post Apr 13 2012, 07:35 PM
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Newest scan doesn't look good at all

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WeatherMonger
post Apr 13 2012, 07:38 PM
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