Jump to content
  • Member Statistics

    17,587
    Total Members
    7,904
    Most Online
    LopezElliana
    Newest Member
    LopezElliana
    Joined

August 17th-21st Severe Weather Event


HillsdaleMIWeather

Recommended Posts

  • Replies 218
  • Created
  • Last Reply

Let me tell you, today has been our lucky day here in Northbrook (I know, pathetic) we got hit nicely with the afternoon cell that blasted north and mainly got rain and some reports of hail (I didnt see any where I was tho). We'll see if I get anything from the incoming cell in Chicago

Link to comment
Share on other sites

New day 2 is a large marginal

 

MFdvWym.png

DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
1226 AM CDT TUE AUG 18 2015  
 
VALID 191200Z - 201200Z  

 
...THERE IS A MRGL RISK OF SVR TSTMS FROM THE GREAT LAKES TO  
ARKANSAS...  
   
..SUMMARY
 
 
SCATTERED THUNDERSTORMS WILL DEVELOP ALONG/AHEAD OF A COLD FRONT  
FROM THE CENTRAL GREAT LAKES INTO THE SOUTHERN PLAINS. ISOLATED  
SEVERE THUNDERSTORMS MAY BE EMBEDDED ALONG THIS CORRIDOR OF  
CONVECTION.  
   
..GREAT LAKES TO SRN PLAINS
 
 
SEASONALLY STRONG MID-LEVEL TROUGH WILL ADVANCE ACROSS THE PLAINS  
INTO THE MS VALLEY BY LATE AFTERNOON AS 60KT+ 500MB SPEED MAX EJECTS  
NEWD ACROSS IA INTO WI. DURING THE DAY1 PERIOD A SFC LOW SHOULD  
EVOLVE OVER THE CNTRL HIGH PLAINS THEN TRACK NEWD INTO WCNTRL WI BY  
DAYBREAK WEDNESDAY IN RESPONSE TO THIS FEATURE. LATEST GFS/NAM  
SUGGEST A FAIRLY SIGNIFICANT SFC LOW WILL TRANSLATE ACROSS WRN  
WI/WRN LAKE SUPERIOR WITH AN ATTENDANT WARM FRONT EXPECTED TO  
ADVANCE NWD INTO THE U.P. OF MI AS MID-LEVEL HEIGHT FALLS FOCUS  
ACROSS THE UPPER GREAT LAKES. LATEST SHORT-RANGE GUIDANCE EXHIBITS  
FAIRLY IMPRESSIVE SHEAR PROFILES IMMEDIATELY AHEAD OF SFC LOW IN  
PROXIMITY TO WARM FRONT...HOWEVER FORECAST INSTABILITY IS SOMEWHAT  
LACKING. ONLY THE NAM GENERATES MODEST CAPE AHEAD OF SFC LOW AND  
THIS MAY BE DUE TO ERRONEOUSLY STEEP LAPSE RATES IN THE LOWEST 3KM.  
 
LATEST THINKING IS SCT CONVECTION WILL BE ONGOING AT 19/12Z  
ALONG/AHEAD OF COLD FRONT AND SUBSTANTIAL CLOUDINESS/PRECIPITATION  
SHOULD NEGATE HEATING AND LIMIT LAPSE RATES. FOR THIS REASON HAVE  
LOWERED SEVERE PROBS ACROSS THE PRE-FRONTAL WARM SECTOR. THERE IS  
SOME CONCERN FOR MORE CONCENTRATED SEVERE NEAR THE SFC LOW...EWD  
ALONG THE ATTENDANT WARM FRONT BUT DESTABILIZATION IS QUESTIONABLE  
GIVEN THE TIMING OF THE SHORT-WAVE TROUGH. IF BUOYANCY IS GREATER  
THAN EXPECTED ACROSS NRN WI INTO THE U.P. OF MI THEN SEVERE PROBS  
MAY NEED TO BE ADJUSTED ACROSS THIS REGION. FORECAST SHEAR PROFILES  
WOULD SUGGEST POTENTIAL SUPERCELLS HOWEVER THE MORE LIKELY SCENARIO  
WILL BE DISORGANIZED MULTI-CELL CLUSTERS AND LINE SEGMENTS.  

 

Link to comment
Share on other sites

looks like josh and i will be watching a dying line push in during the late innings tonight

 

I used to go to Wrigley a few times a year, but not since ticket prices became outrageous. Kind of a scary place to be when severe comes rolling in.

 

I would like to see it since the updates.

Link to comment
Share on other sites

Possible tornado watch

 

l7tn5jb.gif

MESOSCALE DISCUSSION 1704
NWS STORM PREDICTION CENTER NORMAN OK
1249 PM CDT TUE AUG 18 2015

AREAS AFFECTED...EAST-CENTRAL/NORTHEAST MO AND EASTERN IA TO
WEST/NORTHWEST IL AND SOUTHERN WI

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 181749Z - 181945Z

PROBABILITY OF WATCH ISSUANCE...60 PERCENT

SUMMARY...STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO GRADUALLY
DEVELOP/INCREASE THROUGH MID-AFTERNOON WITHIN A CORRIDOR ACROSS
EAST-CENTRAL/NORTHEAST MO AND EASTERN IA INTO WEST/NORTHWEST IL AND
SOUTHERN WI. SOME SEVERE HAIL MAY BE POSSIBLE...BUT DAMAGING WINDS
AND A COUPLE OF TORNADOES ARE THE PRIMARY RISKS. ONE OR MORE WATCH
ISSUANCES ARE POSSIBLE ACROSS THE REGION BY MID-AFTERNOON.

DISCUSSION...AIR MASS DESTABILIZATION IS OCCURRING EARLY THIS
AFTERNOON PRINCIPALLY ACROSS THE EASTERN HALF OF MO AND FAR EASTERN
IA INTO IL...IN AREAS TO THE SOUTH/SOUTHWEST OF AN ARCING OUTFLOW
BOUNDARY THAT EXTENDS FROM THE QUAD CITIES AREA SOUTHEASTWARD TO
EAST-CENTRAL IL/CENTRAL INDIANA. RECENT VISIBLE SATELLITE IMAGERY
REFLECTS SOME TOWERING CU BENEATH THE CIRRUS IN VICINITY OF THE
BOUNDARY...WHILE MORE PREVALENT TOWERING CU IS NOTED WITHIN A WEAK
BOUNDARY/ZONE OF CONFLUENCE ACROSS EAST-CENTRAL MO. A
NORTHEASTWARD-SHIFTING MCV/VORT MAX CURRENTLY ACROSS NORTHWEST
MO/SOUTHWEST IA WILL ENHANCE FORCING FOR ASCENT/VERTICAL SHEAR
ACROSS THE REGION...WITH INCREASING SURFACE-BASED STORM DEVELOPMENT
LIKELY BY MID-AFTERNOON.

AS LOW/MID-LEVEL WINDS CONTINUE TO STRENGTHEN THROUGH THE
AFTERNOON/EARLY EVENING HOURS...THE MAIN TORNADO THREAT SHOULD EXIST
IN AREAS NEAR/JUST NORTH OF THE MODIFYING/NORTHWARD-SHIFTING
OUTFLOW-RELATED ZONE OF DIFFERENTIAL HEATING /CURRENTLY ACROSS FAR
EASTERN IA AND NORTH-CENTRAL IL/ WHERE LOW-LEVEL SHEAR/VORTICITY
WILL BE MAXIMIZED. DAMAGING WINDS SHOULD ALSO BE A PREVALENT
CONCERN...WITH SOME SEVERE HAIL ALSO POSSIBLE.

 

Link to comment
Share on other sites

Color me skeptical on the reintroduction of the Slight Risk for Michigan tomorrow, with the best shear still looking to lag behind the warm sector.

We shouldn't have been removed to begin with. I am completely behind the reintroduction of the slight risk.
Link to comment
Share on other sites

Interested to hear your reasoning behind that if you wouldn't mind sharing, as I do value your judgment.

well nothing has changed in the models with respect to tomorrow, we will have decent shear especially along the front and a good amount of instability in the 1500-2000 J/kg. The models have been consistent with this which is why the reduction made no sense as nothing had changed other than the NAM actually getting more robust with the parameters. Basically there was no reason to change us to a marginal as nothing had changed in the models.
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...