Jump to content
  • Member Statistics

    17,586
    Total Members
    7,904
    Most Online
    23Yankee
    Newest Member
    23Yankee
    Joined

July 5th and beyond Severe Weather thread


Recommended Posts

I really wanted to report an estimated wind speed but it'd be just a guess so i didn't call in to fgf. I was on the supercell in Richland County, ND I was on it before it got rain wrapped and impossible to chase then it ran me over and dominated the area. I had to move my car into the wind because i felt my back end lift up a couple times.

Before it got rain wrapped but right as it got outflow dominant and the RFD surged out in front

http://www.youtube.c...u/0/Ck5j_61B4OA

then I tried to get east and this thing ate me up winds were at times stronger than this but midway through I had the brilliant idea of actually recording it arrowheadsmiley.png]

http://www.youtube.c...u/1/UM79QK3xits

Edit: if you get bored just go to 45 seconds in pretty crazy wind, this was a NW wind so it was wrapping into the circulation as the storm passed just south east of me

Nice vids! The second wind vid was pretty awesome.

But yeah, call in anything, we give all reports credence, and they are definitely important during bigger events. Not only are they used for overall verification, but they are used in SVS's (Severe Weather Statements) on determining whether to continue a warning or cancel it...but also to include reports in the warning (for instance, "this storm has a history of 70 MPH winds", etc.). Wind estimates are LSR'd as "estimate" instead of "measured", but they do count.

Also, that blizzard vid you have on your youtube page brings back good winter storm memories.thumbsupsmileyanim.gif

Link to comment
Share on other sites

  • Replies 531
  • Created
  • Last Reply

Hey guys, quick question on storm motion vectors, since I never really have understood them (other than the speed component). Does "220.." show a more easterly component of motion or does "260.." show a more easterly component of motion? (basically from a directional standpoint, east-northeast vs. northeast)

Link to comment
Share on other sites

That line in Iowa is really cooking now.

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE QUAD CITIES IA IL

443 AM CDT MON JUL 11 2011

IAC011-095-103-107-113-111015-

/O.CON.KDVN.SV.W.0115.000000T0000Z-110711T1015Z/

LINN IA-KEOKUK IA-JOHNSON IA-IOWA IA-BENTON IA-

443 AM CDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT

FOR BENTON...IOWA...NORTHWESTERN JOHNSON...NORTHERN KEOKUK AND

WESTERN LINN COUNTIES...

AT 442 AM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A LINE

OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN

EXCESS OF 80 MPH. THESE STORMS WERE LOCATED APPROXIMATELY ALONG A

LINE EXTENDING FROM 11 MILES WEST OF GARRISON TO LUZERNE TO LAKE IOWA

TO THORNBURG...OR ALONG A LINE EXTENDING FROM 17 MILES WEST OF VINTON

TO 9 MILES NORTHWEST OF MARENGO TO 13 MILES SOUTHWEST OF MARENGO TO

11 MILES NORTHWEST OF SIGOURNEY...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GENOA

BLUFF...BLAIRSTOWN...MILLERSBURG...VAN HORNE...KESWICK...WATKINS...

SIG-NOR FIELD AIRPORT...WEBSTER...CONROY...WILLIAMSBURG...WEST

AMANA...SOUTH AMANA...UPPER SOUTH AMANA...NORWAY...NEWHALL...NORTH

ENGLISH...HIGH AMANA...MOUNT AUBURN...PARNELL...SOUTH ENGLISH...

MIDDLE AMANA...AMANA...WALFORD...VINTON MEMORIAL AIRPORT...

HOMESTEAD...EAST AMANA...ATKINS...HOLBROOK...FAIRFAX...KINROSS...

SHELLSBURG...OXFORD...CHENEY...CEDAR RAPIDS MUNICIPAL AIRPORT...

PALO...WINDHAM...TIFFIN...COSGROVE...URBANA...SPENCERS GROVE AND KENT

COUNTY PARK.

THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 205 AND 237.

Link to comment
Share on other sites

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE QUAD CITIES IA IL

516 AM CDT MON JUL 11 2011

IAC011-031-055-095-103-105-113-111100-

/O.CON.KDVN.SV.W.0117.000000T0000Z-110711T1100Z/

LINN IA-JOHNSON IA-IOWA IA-DELAWARE IA-BENTON IA-CEDAR IA-JONES IA-

516 AM CDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 AM CDT

FOR WESTERN JONES...WESTERN CEDAR...EASTERN BENTON...SOUTHERN

DELAWARE...EASTERN IOWA...JOHNSON AND LINN COUNTIES...

AT 512 AM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A LINE

OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN

EXCESS OF 80 MPH. THESE STORMS WERE LOCATED APPROXIMATELY ALONG A

LINE EXTENDING FROM TROY MILLS TO MARION TO COSGROVE TO AMISH...OR

ALONG A LINE EXTENDING FROM 17 MILES EAST OF VINTON TO CEDAR RAPIDS

TO 11 MILES WEST OF IOWA CITY TO 18 MILES NORTHWEST OF WASHINGTON...

MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO

ALBURNETT...ELY...SANDY BEACH CAMP GROUND...BERTRAM...NORTH

LIBERTY...MARION AIRPORT...FRYTOWN...TWIN VIEW HEIGHTS...OAKDALE...

CORALVILLE...PALISADES-KEPLER SATE PARK...LAKE MACBRIDE STATE PARK...

SUGAR BOTTOM CAMP GROUND...PARIS...SHARON CENTER...PARALTA...CENTRAL

CITY...COGGON...SOLON...WEST OVERLOOK...WHITTIER...SPRINGVILLE...

UNIVERSITY HEIGHTS...VIOLA...MOUNT VERNON...WAUBEEK...UNIVERSITY OF

IOWA...IOWA CITY MUNICIPAL AIRPORT...NEWPORT...MARTELLE...LISBON...

MORSE...SUTLIFF...ELMIRA...PRAIRIEBURG...HILLS...STONE CITY...

FAIRVIEW...OASIS...MORLEY...BUCK CREEK...WAPSIPINICON STATE PARK...

ANAMOSA...CEDAR BLUFF...MECHANICSVILLE...WEST BRANCH...BUCHANAN...

HOPKINTON...CEDAR VALLEY...LANGWORTHY...OLIN...AMBER...SPRINGDALE...

STANWOOD...CENTRAL PARK...MONTICELLO...SAND SPRINGS...MONTICELLO

MUNICIPAL AIRPORT...TIPTON MATTHEWS AIRPORT AND ROCHESTER.

THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 219 AND 264.

THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 1 AND 45.

Link to comment
Share on other sites

Picking up a big area of 90-100 kts just west of Vinton, looks to be big time trouble. It's about to move over an ASOS station, so we'll see what it's got.

That part of the line has had periodic Tornado Warnings all the way back to Des Moines.

Link to comment
Share on other sites

I find the bolded part of this warning interesting as I have never seen that in a warning before

BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE QUAD CITIES IA IL

524 AM CDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

NORTHWESTERN JACKSON COUNTY IN EAST CENTRAL IOWA...

NORTHERN JONES COUNTY IN EAST CENTRAL IOWA...

NORTHEASTERN LINN COUNTY IN EAST CENTRAL IOWA...

SOUTHEASTERN BUCHANAN COUNTY IN NORTHEAST IOWA...

DELAWARE COUNTY IN NORTHEAST IOWA...

DUBUQUE COUNTY IN NORTHEAST IOWA...

* UNTIL 630 AM CDT.

* AT 520 AM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN

EXCESS OF 80 MPH. THIS STORM WAS LOCATED APPROXIMATELY NEAR

RYAN...OR 11 MILES SOUTH OF MANCHESTER...AND MOVING EAST AT 60 MPH.

THIS STORM IS PRODUCING DAMAGING WINDS OVER 80 MPH...AND SUSTAINED

WINDS OF 60 MPH FOR 10 MINUTES OR MORE.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO

DELHI...DELAWARE...EDGEWOOD...HOPKINTON...GREELEY...MONTICELLO...

EARLVILLE...WORTHINGTON...COLESBURG...DYERSVILLE...CASCADE...NEW

VIENNA...FARLEY...LUXEMBURG...BANKSTON...EPWORTH...HOLY CROSS...

BERNARD...PEOSTA...CENTRALIA...RICKARDSVILLE...BALLTOWN...

ZWINGLE...ASBURY...DURANGO...SHERRILL...LA MOTTE...DUBUQUE AND

SAGEVILLE.

Link to comment
Share on other sites

I find the bolded part of this warning interesting as I have never seen that in a warning before

BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE QUAD CITIES IA IL

524 AM CDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

NORTHWESTERN JACKSON COUNTY IN EAST CENTRAL IOWA...

NORTHERN JONES COUNTY IN EAST CENTRAL IOWA...

NORTHEASTERN LINN COUNTY IN EAST CENTRAL IOWA...

SOUTHEASTERN BUCHANAN COUNTY IN NORTHEAST IOWA...

DELAWARE COUNTY IN NORTHEAST IOWA...

DUBUQUE COUNTY IN NORTHEAST IOWA...

* UNTIL 630 AM CDT.

* AT 520 AM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN

EXCESS OF 80 MPH. THIS STORM WAS LOCATED APPROXIMATELY NEAR

RYAN...OR 11 MILES SOUTH OF MANCHESTER...AND MOVING EAST AT 60 MPH.

THIS STORM IS PRODUCING DAMAGING WINDS OVER 80 MPH...AND SUSTAINED

WINDS OF 60 MPH FOR 10 MINUTES OR MORE.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO

DELHI...DELAWARE...EDGEWOOD...HOPKINTON...GREELEY...MONTICELLO...

EARLVILLE...WORTHINGTON...COLESBURG...DYERSVILLE...CASCADE...NEW

VIENNA...FARLEY...LUXEMBURG...BANKSTON...EPWORTH...HOLY CROSS...

BERNARD...PEOSTA...CENTRALIA...RICKARDSVILLE...BALLTOWN...

ZWINGLE...ASBURY...DURANGO...SHERRILL...LA MOTTE...DUBUQUE AND

SAGEVILLE.

That is definitely rare. It was what I was referring to earlier with cmichweather though--the NWS will use estimated reports (if reasonable and reliable) in severe weather statements. http://www.crh.noaa....on=1&glossary=0

Link to comment
Share on other sites

More bark than bite here as the strong wind barely missed me to the north. I don't think the wind ever exceeded 40 mph. There was a lot of lightning, but no loud thunder. It never even rained especially hard and I only picked up a few tenths of an inch.

Edit: I see there were also reports of 60 mph on the south side, 70 mph on the east side, and 52 mph at the airport. It appears my garden really dodged a bullet as all the wind went around me. The power did go out for a while, so there was obviously strong wind nearby.

Edit #2: I just found some of my plants damaged(argh!!!) so the wind must have gone above 40 mph.

Link to comment
Share on other sites

Both lines of storms likely to stay together and strenghthen or fizzle out with more storms firing later? Not often you see watches issued this early this far north.

Depends.

The instability/moisture axis is still off to the west (Northern Illinois into Indiana and SE), and the WRF-NMM weakens the storms as they cross Michigan (just a few rain showers and some debris). I'm thinking they're going to evolve similar to what the WRF-NMM shows, but I could be wrong (though there's nothing to suggest otherwise).

We would need some rapid destabilization/moisture advection to take place this way in order for them to hold, but it's pretty much a race for time with the speed these storms are moving.

Either way, the storms probably won't weaken fast enough to not disrupt any chance for development later.

Link to comment
Share on other sites

Depends.

The instability/moisture axis is still off to the west (Northern Illinois into Indiana and SE), and the WRF-NMM weakens the storms as they cross Michigan (just a few rain showers and some debris). I'm thinking they're going to evolve similar to what the WRF-NMM shows, but I could be wrong (though there's nothing to suggest otherwise).

We would need some rapid destabilization/moisture advection to take place this way in order for them to hold, but it's pretty much a race for time with the speed these storms are moving.

Either way, the storms probably won't weaken fast enough to not disrupt any chance for development later.

The instability pool is shifting east very quickly, I think the opposite of what you are expecting to happen will happen. Those storms over SW MI are on the lead edge of the instability gradient.

Link to comment
Share on other sites

Pretty strongly worded Severe Warning for parts of GRR's area.

BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE GRAND RAPIDS MI

738 AM EDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

LAKE COUNTY IN WEST CENTRAL MICHIGAN...

NEWAYGO COUNTY IN WEST CENTRAL MICHIGAN...

OCEANA COUNTY IN WEST CENTRAL MICHIGAN...

* UNTIL 830 AM EDT

* AT 734 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE

TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE

HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 75 MPH. THESE STORMS

WERE LOCATED ALONG A LINE EXTENDING FROM FREESOIL TO 6 MILES NORTH

OF WHITEHALL..AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...

PENTWATER... NEWAYGO... BALDWIN...

SHELBY... BITELY... FREMONT...

WHITE CLOUD... IRONS... LUTHER...

SILVER LAKE STATE PARK... CRYSTAL VALLEY...

FERRY... ELBRIDGE... MEARS...

STONY LAKE... NEW ERA... HESPERIA...

LITTLE POINT SABLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE

ACROSS WISCONSIN. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK

SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TAKE SHELTER NOW. THIS IS AN EXTREMELY DANGEROUS SITUATION WITH

TORNADO LIKE WINDS AND SIGNIFICANT DAMAGE EXPECTED. MOBILE HOMES AND

HIGH PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS

MAGNITUDE AND MAY BE OVERTURNED. TAKE COVER NOW...MOVE TO AN INTERIOR

ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

Link to comment
Share on other sites

Depends.

The instability/moisture axis is still off to the west (Northern Illinois into Indiana and SE), and the WRF-NMM weakens the storms as they cross Michigan (just a few rain showers and some debris). I'm thinking they're going to evolve similar to what the WRF-NMM shows, but I could be wrong (though there's nothing to suggest otherwise).

We would need some rapid destabilization/moisture advection to take place this way in order for them to hold, but it's pretty much a race for time with the speed these storms are moving.

Either way, the storms probably won't weaken fast enough to not disrupt any chance for development later.

Or I'm think they could take a turn more to the SE, towards Northern Indiana and Ohio.

Link to comment
Share on other sites

Or I'm think they could take a turn more to the SE, towards Northern Indiana and Ohio.

Also dont see this happening, they aren't going to move perpendicular to the mean flow. It would be more likely they'd fall apart if anything (not likely). Also if hypothetically they do fall apart the line over Chicago does not look like its losing steam anytime soon, and is moving into an area of higher instability and low level shear.

Link to comment
Share on other sites

66 mph gust as the storms came onshore, impressive.

PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE GRAND RAPIDS MI

743 AM EDT MON JUL 11 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

0736 AM TSTM WND GST 5 WSW WHITEHALL 43.37N 86.42W

07/11/2011 M66 MPH MUSKEGON MI BROADCAST MEDIA

MEASURED WIND GUST AT THE WHITE RIVER LIGHTHOUSE. REPORT

COURTESY OF WOODTV.

Link to comment
Share on other sites

Also dont see this happening, they aren't going to move perpendicular to the mean flow. It would be more likely they'd fall apart if anything (not likely).

Or the first line could slow down and both lines merge right over our houses (Joking of course). Either way very impressive lines for the time of day. Curious to see what occurs as it moves east and as daytime heating increases.

Link to comment
Share on other sites

Or the first line could slow down and both lines merge right over our houses (Joking of course). Either way very impressive lines for the time of day. Curious to see what occurs as it moves east and as daytime heating increases.

One thing's for sure, this type of speed won't do us any good if we're looking for any serious destabilization ahead of it, assuming the storms don't take a turn SE along the instability/moisture axis.

SEVERE THUNDERSTORM WARNING

MIC067-081-107-117-111330-

/O.NEW.KGRR.SV.W.0079.110711T1159Z-110711T1330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE GRAND RAPIDS MI

759 AM EDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

IONIA COUNTY IN SOUTH CENTRAL MICHIGAN...

KENT COUNTY IN SOUTHWEST MICHIGAN...

MECOSTA COUNTY IN CENTRAL MICHIGAN...

MONTCALM COUNTY IN CENTRAL MICHIGAN...

* UNTIL 930 AM EDT

* AT 756 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE

TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE

HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE

LOCATED ALONG A LINE EXTENDING FROM FREMONT TO 12 MILES NORTHWEST

OF SPARTA TO 6 MILES SOUTHWEST OF GRAND HAVEN..AND MOVING SOUTHEAST

AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...

HOWARD CITY... GREENVILLE... BIG RAPIDS...

GRAND RAPIDS... IONIA... EDMORE...

STANTON... MORLEY... MECOSTA...

SPARTA... CEDAR SPRINGS... ROCKFORD...

LOWELL... HUBBARDSTON... SARANAC...

LAKE ODESSA... BELDING... PORTLAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR

HOME OR BUSINESS. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE

ROAD.

&&

LAT...LON 4364 8509 4347 8508 4346 8485 4277 8484

4277 8578 4329 8579 4330 8556 4378 8556

TIME...MOT...LOC 1159Z 302DEG 48KT 4348 8582 4323 8588

4296 8623

WIND...HAIL 60MPH 1.00IN

$$

COBB

Link to comment
Share on other sites

Yeah and wait until later. This is one of those days that can go gangbusters given the high instability and decent shear.

This definitely has the feel of one of those days, not many times you wake up to hazy sun with temps already in the low 80s and a nice bow on the way. Depending on how this thing survives the loss of the llj, we could have a long track monster.

Warning boxes already to Cook Co ahead of the bow, possible seiche potential with this one as well.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...