Severe Storm Outlook Narrative (AC)
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

821
ACUS11 KWNS 282054
SWOMCD
SPC MCD 282054
MNZ000-SDZ000-NDZ000-NEZ000-MTZ000-WYZ000-282200-

Mesoscale Discussion 0903
NWS Storm Prediction Center Norman OK
0354 PM CDT Sun May 28 2017

Areas affected...Northeastern Wyoming...southeastern
Montana...northwestern Nebraska...much of South Dakota...southern
North Dakota...and far western Minnesota

Concerning...Severe potential...Watch unlikely

Valid 282054Z - 282200Z

Probability of Watch Issuance...20 percent

SUMMARY...Scattered convection continues to move southeastward
through the discussion area, with strong to isolated severe wind
gusts being the primary threats with this activity.

DISCUSSION...Several 40-45 knot wind gusts have been reported over
the past hour with scattered, relatively high-based thunderstorms
across the discussion area.  An isolated severe wind gusts (54
knots) was also reported at Faith, SD (KD07) in the past few
minutes.  These storms are in an environment characterized by weak
instability (generally less than 1000 J/kg MUCAPE) and strong flow
aloft (around 50 knots at 500mb) that, when mixed with scattered
updrafts and 30-45 F surface dewpoint depression, are fostering the
occasional strong wind gusts.  A WW will likely not be needed for
this activity given the ongoing sub-severe nature of most of the
gusty winds.  This activity should wane after sunset with the onset
of nocturnal boundary layer cooling.

..Cook.. 05/28/2017

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...DLH...MPX...FGF...FSD...ABR...BIS...LBF...UNR...
CYS...BYZ...RIW...

LAT...LON   44410681 45130554 45930257 46010219 46650000 47089826
            47259732 47369623 47159516 47059481 46239445 45609463
            44769651 43420068 42570163 42140309 42470507 43230665
            44410681




USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.