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June 12-18 Severe/Heavy Rain Threats/Possibilities


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I have 4.25" in the gauge since 4:30pm. Still raining too. That's the normal total for the month of June. 

holy crap...  Its pouring here now, but i think it'll move through half way quick.  This month its just been like every day we are getting rain. 

 

Not much wind...some lightning...  i wouldn't want to be out jogging.

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Gino's latest discussion sums it up perfectly for the LOT CWA tonight. Record hi PWATs at DVN on the 00Z sounding with the instability gradient/axis lined up such that activity to our northwest will slide E/SE into the region. Going to be some good training in parts of the region. 

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Gino's latest discussion sums it up perfectly for the LOT CWA tonight. Record hi PWATs at DVN on the 00Z sounding with the instability gradient/axis lined up such that activity to our northwest will slide E/SE into the region. Going to be some good training in parts of the region. 

Nice disco update from him. First time he's been onboard for an event in a while...

 

825 PM CDT  

 

EARLIER CONVECTION HAS HELPED SHARPEN THE WARM FRONTAL BOUNDARY  

OVER NORTHWEST ILLINOIS AND EASTERN IA WITH WARM FRONT EXTENDING  

SOUTHEAST INTO CENTRAL IL. HAVE SEEN OCNL STORMS POPPING ON THE  

WARM FRONTAL BOUNDARY EARLY THIS EVENING, BUT WITH SUNSET SOON AND  

ANTICIPATED RAMP UP OF LLJ/WAA REGIME WOULD ANTICIPATE ADDITIONAL  

DEVELOPMENT TO BECOME MORE FOCUSED FARTHER NORTHEAST INTO "COOL"  

SIDE OF THE FRONT IN OUR AREA LATER THIS EVENING.  

 

IN ADDITION, ALSO MONITORING MCS OVER WESTERN WI AND NORTHEASTERN  

IA WHICH HAS BEEN TRACKING EASTWARD. ON ITS CURRENT TRAJECTORY,  

JUST THE SOUTHERN FLANK OF THE MCS WOULD SCRAPE ACROSS OUR  

NORTHERN CWA. HOWEVER, NW-SE ORIENTED INSTABILITY AXIS ALONG WITH  

AREA OF MAXIMIZED WAA WOULD SUGGEST THAT THIS SYSTEM WILL START TO  

PROPAGATE MORE ESE OR PERHAPS EVEN SE OVER THE NEXT SEVERAL HOURS.  

 

THE 00Z DVN SOUNDING IS CONCERNING FOR A COUPLE REASONS; FIRST THE  

INSTABILITY IS IMPRESSIVE AND STRONGER THAN DEPICTED BY RAP  

MESOANALYSIS AND LIKELY FAIRLY REPRESENTATIVE OF ENVIRONMENT OVER  

OUR NORTHERN/WESTERN CWA. THE T/TD SPREADS ARE QUITE SMALL NOW, SO  

NOT EXPECTING ANY SIGNIFICANT NOCTURNAL STABILIZATION OF THE  

BOUNDARY LAYER, SO THIS MCS COULD POTENTIALLY HAVE SOME SIZABLE  

INSTABILITY TO FEED ON AS IT GETS INTO OUR CWA LATER THIS EVENING.  

COULD SEE A SPORADIC DAMAGING WIND THREAT WITH THIS LINE EVEN INTO  

THE LATE EVENING AND EARLY NIGHT, ESPECIALLY IN OUR NORTHERN CWA.  

 

SECONDARY CONCERN IS POTENTIAL FOR HEAVY RAIN AND PERHAPS AN  

ISOLATED FLASH FLOOD THREAT. THE 00Z DVN SOUNDING HAD AN OBSERVED  

PWAT OF 2.19 INCHES, WHICH SPC SOUNDING CLIMO PAGE INDICATES IS  

A RECORD HIGH PWAT FOR DVN FOR SO EARLY IN THE SUMMER (GRANTED  

RECORDS ONLY DATE BACK TO 1995 FOR THIS SITE). REGARDLESS, SUCH A  

HIGH PWAT ENVIRONMENT IS OBVIOUSLY RAISES RED FLAGS FOR HEAVY RAIN  

POTENTIAL. BY LATE EVENING INTO THE OVERNIGHT RAP AND NAM BOTH  

FORECAST UPWIND PROPAGATING CORFIDI VECTOR MAGNITUDE TO GET QUITE  

SMALL. IF THE MCS MOVING INTO THE AREA DEVELOPS A QUASI-STATIONARY  

BACK BUILDING TAIL, WHICH IS POSSIBLE GIVEN THE STRONG WAA/LLJ  

DESPITE LESS THAN IDEAL ORIENTATION OF THE FRONT, THEN FLASH FLOOD  

THREAT COULD BE QUITE REAL. TOO MUCH UNCERTAINTY TO JUMP OUT WITH  

ANY FLOOD HEADLINES, BUT SOMETHING THAT WILL NEED TO BE CLOSELY  

MONITORED TONIGHT.  

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FFW just issued for most of the LOT CWA...

 

* THUNDERSTORMS ARE LIKELY TONIGHT, AND GIVEN THE VERY MOIST AIR
MASS, SOME OF THE STORMS COULD PRODUCE TORRENTIAL RAINFALL RATES
OF UP TO 2 INCHES PER HOUR. THE POTENTIAL EXISTS FOR STORMS TO
REPEATEDLY DEVELOP AND MOVE OVER THE SAME AREAS WHICH COULD LEAD
TO LOCALIZED RAINFALL TOTALS IN EXCESS OF 4 INCHES BY MORNING
IN A FEW LOCATIONS.
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Storms are beginning to take a more easterly movement rather than Northeast especially as they enter NC IL. I'm excited

 

Cold pool forming to the north is making these storms turned towards our area.

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Severe thunderstorm warning in north central IL.

 

 

SEVERE THUNDERSTORM WARNING
ILC141-201-150530-
/O.NEW.KLOT.SV.W.0026.160615T0438Z-160615T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1138 PM CDT TUE JUN 14 2016

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
OGLE COUNTY IN NORTH CENTRAL ILLINOIS...
WINNEBAGO COUNTY IN NORTH CENTRAL ILLINOIS...

* UNTIL 1230 AM CDT

* AT 1138 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR LAKE SUMMERSET TO NEAR GERMAN VALLEY TO NEAR
POLO...MOVING EAST AT 35 TO 40 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES.

* SEVERE THUNDERSTORMS WILL BE NEAR...
DURAND AROUND 1145 PM CDT.
OREGON AND BYRON AROUND 1150 PM CDT.
WINNEBAGO AROUND 1155 PM CDT.
STILLMAN VALLEY AROUND 1200 AM CDT.
ROCKTON AND ROCKFORD AIRPORT AROUND 1205 AM CDT.
MACHESNEY PARK...SOUTH BELOIT AND ROSCOE AROUND 1210 AM CDT.
CHERRY VALLEY AND HILLCREST AROUND 1215 AM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE NEW
MILLFORD...ADELINE...DAVIS JUNCTION AND LEAF RIVER.

INCLUDING THE FOLLOWING INTERSTATES...
I-39 BETWEEN MILE MARKERS 102 AND 123.
I-90 BETWEEN MILE MARKERS 1 AND 2...AND BETWEEN MILE MARKERS 61 AND
76.

 

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I didn't think you had anywhere near that much.  Oddly, I've had 1.55" and the radar estimate says we've had about the same.

 

3.19" now.  Almost 2" of that came in the last hour and a half.  

 

MRMS radar qpf estimates over 3.5" a few miles to my east.  Shows widespread 4-5" totals from south of Dubuque over towards Freeport.

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Woke me up from sound sleep. Probably best nighttime hit in the eight years at my current place. Best gusts came well after rain started. It was blowing hard and coming down torrential.

You're in for a real treat downwind in Northbrook if she can maintain.

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