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Mesoscale Discussion 1214
NWS Storm Prediction Center Norman OK
0352 PM CDT Mon Jul 13 2020
Areas affected...Northwest/North-Central MN
Concerning...Severe potential...Watch likely
Valid 132052Z - 132245Z
Probability of Watch Issuance...80 percent
SUMMARY...A convective line is expected to develop across northwest
MN. Severe threats include damaging wind gusts and brief
line-embedded tornadoes.
DISCUSSION...Recent surface analysis over the region places a low
over far northeast ND (about 30 miles east-northeast of DVL) with an
occluded front extending southward where it intersect a triple
point/weak low over southeast ND (about 15-20 miles southwest of
FAR). A cold front extends south-southwestward from this triple
point and and warm front extends southeastward. Cloudiness over far
northeast ND and adjacent northwest MN has stunted heating, but
forcing for ascent and vertical shear remain strong.
The strong forcing for ascent will persist as the shortwave trough
continues eastward, fostering continued thunderstorm development
near the surface low. The greater buoyancy while likely remain south
of the region, but the sustained ascent coupled with the strong
vertical shear continues to favor the development of a convective
line. Recent radar imagery has shown a forward surge west of HCO,
which could be the beginnings of this line. Damaging wind gusts will
be the primary severe threat, but the low-level southeasterly flow
suggests some line-embedded tornado potential exists as well.
..Mosier/Edwards.. 07/13/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...DLH...FGF...
LAT...LON 47199609 47589736 48189750 48799727 49049651 48809410
47359421 47149500 47199609
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