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May 27-June 2 Severe Weather


Hoosier

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I'm banking on an overnight MCS traversing similar grounds and helping to hang the front up a little further south, if it doesn't happen, north of I80 would be in play

 

The 12z 4km NAM nest run lights up the northbound warm front overnight tonight with storms ahead of an area of rain/storms that moves through IL during the late morning hours and clears the area by noon then we get new storm develop near/after 0z tomorrow evening from Chicago to ne MO along the front.

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The 12z 4km NAM nest run lights up the northbound warm front overnight tonight with storms ahead of an area of rain/storms that moves through IL during the late morning hours and clears the area by noon then we get new storm develop near/after 0z tomorrow evening from Chicago to ne MO along the front.

 

I saw that, I think the southwest suburbs look good (plainfield magnet engaged?), I'm still not sure about the city proper and north.

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And here's the watch.

 

  

URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 229
   NWS STORM PREDICTION CENTER NORMAN OK
   240 PM CDT MON MAY 27 2013

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
     CENTRAL AND SOUTHERN ILLINOIS
     WEST-CENTRAL AND SOUTHWEST INDIANA
     EAST-CENTRAL MISSOURI

   * EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
     1000 PM CDT.

   * PRIMARY THREATS INCLUDE...
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
   STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF
   DANVILLE ILLINOIS TO 45 MILES SOUTHWEST OF MOUNT VERNON ILLINOIS.
    FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU9).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.

   &&

   OTHER WATCH INFORMATION...CONTINUE...WW 227...WW 228...

   DISCUSSION...LONG-LIVED MCS MOVING THROUGH THE MID-MS VALLEY HAS
   RECENTLY INTENSIFIED AS INFLOW AIR MASS HAS WARMED INTO THE 80S WITH
   DEWPOINTS CLIMBING THROUGH THE 50S INTO LOWER-MID 60S.  WHEN COUPLED
   WITH MODESTLY STRONG UNIDIRECTIONAL WIND PROFILES...THE SETUP SHOULD
   SUPPORT THE CONTINUED INTENSIFICATION OF THE MCS WITH A RISK FOR
   DAMAGING WINDS AND SOME HAIL

.
 

 

 

 

post-4544-0-06927700-1369684071_thumb.gi

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Storm near Springfield IL went tornado warned.

 

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
259 PM CDT MON MAY 27 2013

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN SANGAMON COUNTY IN CENTRAL ILLINOIS...

* UNTIL 330 PM CDT

* AT 255 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR RIVERTON...AND MOVING NORTHEAST AT 30 MPH.

  HAZARD...DEVELOPING TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
           SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
           OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
           EXTENSIVE TREE DAMAGE IS LIKELY.

* LOCATIONS IMPACTED INCLUDE...
  MECHANICSBURG...SPAULDING...DAWSON AND BUFFALO.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 94 AND 103.

THIS INCLUDES INTERSTATE 72 BETWEEN MILE MARKERS 100 AND 123.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

 

 

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Update on Riverton IL

0300 PM TSTM WND DMG 1 S RIVERTON 39.83N 89.54W

05/27/2013 SANGAMON IL EMERGENCY MNGR

UPDATED INFORMATION...REPORT OF 48 MOBILE HOMES DAMAGED. SOME ROOFS PEELED OFF. TREES AND TREE LIMBS DOWN ON SEVERAL MOBILE HOMES. WIND ESTIMATED AROUND 75 MPH. NO INJURIES REPORTED. ALSO SEVERAL LARGE TREES UPROOTED JUST TO THE WEST OF THE MOBILE HOME PARK AT OAK HILL CEMETARY.

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Springfield State Journal-Register story on this afternoon's storms:

 

http://www.sj-r.com/breaking/x1039448671/Wind-gusts-top-60-mph-as-storm-blows-through

 

Amazingly, the Memorial Day ceremonies at Camp Butler National Cemetery near Riverton had just ended and attendees were heading home when the storm hit--one of the radio stations (WMAY 970) was going wall-to-wall storm coverage from 3-6 this afternoon and a caller had reported broken flagpoles and perhaps damage to a gravestone at the cemetery:

 

http://www.sj-r.com/breaking/x1039448718/Hundreds-gather-at-Camp-Butler-to-honor-fallen-soldiers

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WICS ABC 20 coverage of today's storms from their Facebook page:

 

https://www.facebook.com/WICSABC20

 

Includes photos of major damage at the city's Henson-Robinson Zoo on the southeast fringe of the city along Lake Springfield.  The zoo will be closed until further notice, but THANKFULLY all animals are reported to be safe.

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There is some damage up by Alexandria. Uprooted trees, snapped poles, and some barns lost their roofs. The storm was definitely rotating, but I followed it for a while and never saw any organization to it. Someone on my FB said there was an area of damage with rotation pattern to it, but I don't know, I haven't seen it for myself, I'll drive up there tomorrow morning.

Sent by my Thumbs, using Tapatalk.

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FWIW current RAP has STP in the 7-8 range in Quad Cities area at 18z Tuesday.

CAPE in excess of 3000 J/kg along/south of I-80 at 17z. It has 80 degree temps and 70 degree dewpoints in that area at 17z which may be overzealous.

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Kinda tricky to figure out how things will evolve tomorrow. The 00z SPC WRF, which is handling things pretty well right now, moves the current IA/MO storms into central IL with a separate area of storms farther north. Then new initiation takes place near the IA/MO border during the afternoon which eventually moves into northern and central IL/IN. My gut is telling me a high end slight for damaging winds with hail also a threat along with a few tornadoes (5% tornado risk on upcoming SWODY1?). Obviously the tor threat will need to be watched across the area and especially near any potential boundary put out by tonight's stuff.

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5% TOR more on the southside and into C IL... the drawing of the 5% contour.... is interesting

15 wind/15 hail

Don't forget the MI/OH peeps...30% wind there. :P

Actually a fairly significant adjustment on this outlook compared to the old day 2, which had a long 30% prob extending into IA/IL.

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Tonights lack of activity is interesting. Low level jet appears to be feeding that complex to the West and not helping to ignite anything else thats organized. Not feeling the heavy rain threat here tonight at all. Also think that complex to the West will lay out the outflow boundary pretty far to the South...so it will take some work to get it up in this area later Tuesday. Not as optimistic about this whole set up as I was yesterday.

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I guess we'll just have to see how everything plays out.

 

Got a pretty good trigger with that MCV moving NE out of Iowa, and also some decent shear. It's just a matter of how much instability can be built up, as always. The LLJ may be sufficient enough in destabilizing the atmosphere upstream, but I'm not holding my breath for that to happen if there's a lot of cloud debris.

 

20130528_1001_DTW_irbw.jpg

 

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