Mesoscale Discussion 928

Issued

Jun 14, 2016, 8:36 PM CDT (01:36 UTC)

Expired

Jun 14, 2016, 10:00 PM CDT

In force

84 min

Issued by

the Storm Prediction Center

The Des Moines radar (KDMX), 143 km from the middle of the area, began a volume at 01:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

940 
ACUS11 KWNS 150137
SWOMCD
SPC MCD 150136 
WIZ000-ILZ000-IAZ000-MNZ000-150300-

MESOSCALE DISCUSSION 0928
NWS STORM PREDICTION CENTER NORMAN OK
0836 PM CDT TUE JUN 14 2016

AREAS AFFECTED...PORTIONS OF CNTRL/ERN IA...FAR SERN MN...SWRN
WI...AND NWRN IL

CONCERNING...SEVERE THUNDERSTORM WATCH 254...256...

VALID 150136Z - 150300Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
254...256...CONTINUES.

SUMMARY...THE SEVERE THREAT IS DIMINISHING ACROSS WW 254 IN CNTRL
IA. A LINGERING LOW-END STRONG/GUSTY WIND AND ISOLATED TORNADO
THREAT CONTINUES ACROSS REMAINING VALID PORTIONS OF WW 256.

DISCUSSION...AN OUTFLOW BOUNDARY FROM EARLIER CONVECTION ACROSS NRN
IA AND SRN MN HAS SURGED SWD ACROSS SRN IA. THIS BOUNDARY HAS
EFFECTIVELY UNDERCUT AN ONGOING CLUSTER OF THUNDERSTORMS IN THE
VICINITY OF DES MOINES...AND LESSENED THE SEVERE RISK ACROSS
REMAINING PARTS OF WW 254. IF CURRENT RADAR TRENDS CONTINUE...WW 254
WILL LIKELY BE ALLOWED TO EXPIRE AT 02Z WITH NO REPLACEMENT WATCH.

FURTHER E ACROSS ERN IA INTO WRN WI AND NWRN IL...A LINE OF
THUNDERSTORMS IS MOVING EWD AROUND 30-35 KT. THIS ACTIVITY HAS HAD
SPORADIC STRONG WINDS/DAMAGE REPORTS OVER THE PAST HOUR. AS IT
CONTINUES EWD INTO WRN WI...IT WILL ENCOUNTER A SFC WARM FRONT AND
WILL LIKELY BECOME ELEVATED AS IT MOVES INTO CNTRL WI. PRIOR TO THIS
OCCURRING...A LOCALIZED STRONG/GUSTY WIND THREAT SHOULD CONTINUE FOR
THE NEXT HOUR OR TWO...AND AN ISOLATED/BRIEF TORNADO REMAINS
POSSIBLE MAINLY WITH CLUSTERS OF CELLS AHEAD OF THE LINE IN FAR ERN
IA AND NWRN IL. EXPECTATIONS ARE FOR THE SEVERE THREAT TO DIMINISH
AS THUNDERSTORMS MOVE FURTHER EWD INTO WI AND NRN IL...AND NO
ADDITIONAL WATCHES ARE PLANNED DOWNSTREAM OF WW 256 INTO CNTRL/ERN
WI OR N-CNTRL IL.

..GLEASON.. 06/15/2016

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GRB...MKX...DVN...ARX...DMX...

LAT...LON   41009484 42189403 42029228 43089159 44569184 44509039
            42878970 41708978 40879295 41009484

Mesoscale Discussions in Iowa, 2016Mesoscale Discussions in Wisconsin, 2016Mesoscale Discussions in Illinois, 2016Every mesoscale discussion in 2016

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.