Mesoscale Discussion 989

Issued

Jun 19, 2016, 7:37 PM CDT (00:37 UTC)

Expired

Jun 19, 2016, 9:30 PM CDT

In force

113 min

Issued by

the Storm Prediction Center

The Duluth radar (KDLH), 61 km from the middle of the area, began a volume at 00:37 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.

349 
ACUS11 KWNS 200037
SWOMCD
SPC MCD 200037 
MNZ000-WIZ000-200230-

MESOSCALE DISCUSSION 0989
NWS STORM PREDICTION CENTER NORMAN OK
0737 PM CDT SUN JUN 19 2016

AREAS AFFECTED...MN...NW WI...WRN LAKE SUPERIOR

CONCERNING...SEVERE THUNDERSTORM WATCH 273...

VALID 200037Z - 200230Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 273
CONTINUES.

SUMMARY...A SEVERE THREAT WILL CONTINUE THIS EVENING FROM NERN MN
SWWD INTO CNTRL AND SW MN WHERE A COUPLE TORNADOES...LARGE HAIL AND
WIND DAMAGE WILL BE POSSIBLE. THE SEVERE THREAT SHOULD EVENTUALLY
AFFECT WRN LAKE SUPERIOR AND NW WI WHERE A NEW WW COULD BE NEEDED
LATER THIS EVENING.

DISCUSSION...LATEST RADAR DATA SHOWS NUMEROUS THUNDERSTORMS
DEVELOPING ALONG A COLD FRONT EXTENDING NEWD ACROSS CNTRL AND NE MN
WITH SEVERAL SUPERCELLS ONGOING ACROSS NERN MN. AHEAD OF THE
FRONT...SFC DEWPOINTS ARE FROM THE MID 60S TO NEAR 70 F WITH MLCAPE
ESTIMATED IN THE 2500 TO 4000 J/KG RANGE. REGIONAL WSR-88D VWPS AT
MINNEAPOLIS AND DULUTH HAVE MODERATE TO STRONG DEEP-LAYER SHEAR
PROFILES WITH SUBSTANTIAL SPEED SHEAR AND SOME DIRECTIONAL TURNING
OF THE WINDS IN THE LOW TO MID-LEVELS. THIS WILL BE FAVORABLE FOR
SUPERCELLS WITH ISOLATED LARGE HAIL AND WIND DAMAGE LIKELY WITH THE
STRONGER STORMS. HAILSTONES OF GREATER THAN 2 INCHES WILL BE
POSSIBLE WITH THE MOST VIGOROUS UPDRAFTS. LOW-LEVEL SHEAR WILL ALSO
BE SUPPORTIVE OF A TORNADO THREAT FOR ANOTHER HOUR OR TWO.

THE STORMS ARE EXPECTED TO APPROACH THE EDGE OF WW 273 BY 03Z.
ALTHOUGH INSTABILITY DECREASES MARKEDLY TO THE EAST OF WW 273...THE
AREA WILL STILL BE MONITORED FOR THE POSSIBILITY OF A NEW WATCH.

..BROYLES/THOMPSON.. 06/20/2016

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

ATTN...WFO...DLH...MPX...

LAT...LON   48349168 46059472 44939601 44329492 44759332 47029033
            47978971 48349168

Mesoscale Discussions in Minnesota, 2016Mesoscale Discussions in Wisconsin, 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.