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

000
ACUS11 KWNS 182357
SWOMCD
SPC MCD 182357
MTZ000-190130-

MESOSCALE DISCUSSION 0368
NWS STORM PREDICTION CENTER NORMAN OK
0657 PM CDT FRI APR 18 2014

AREAS AFFECTED...PORTIONS OF EASTERN MONTANA

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 182357Z - 190130Z

PROBABILITY OF WATCH ISSUANCE...5 PERCENT

SUMMARY...AN ISOLATED MARGINALLY SVR WIND GUST MAY OCCUR EARLY THIS
EVENING. A WW IS NOT NEEDED.

DISCUSSION...CONVECTION ARCING N-S IN ADVANCE OF A STRONG/COMPACT
VORT MAX CROSSING MONTANA PER WATER VAPOR IMAGERY WILL CONTINUE
SPREADING EWD WITHIN A ZONE OF STEEP TROPOSPHERIC LAPSE RATES. WITH
40-50 KT OF MID-LEVEL FLOW SAMPLED BY GGW/BLX VWP...CONVECTION WITH
ISOLATED-SCATTERED LIGHTNING STRIKES WILL REMAIN POSSIBLE EWD ACROSS
ERN MT. AN ISOLATED MARGINALLY SVR WIND GUST MAY ACCOMPANY THIS
ACTIVITY WITHIN AROUND 40-50 MILES DOWNSTREAM OF ITS ONGOING
POSITION. EVEN FARTHER E...PROGRESSIVELY LESS STEEP LOW-LEVEL LAPSE
RATES OWING TO EARLIER CLOUD-STUNTED SFC HEATING SHOULD DEPLETE SUCH
POTENTIAL.

..COHEN/MEAD.. 04/18/2014

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

ATTN...WFO...BYZ...GGW...

LAT...LON   48180746 48610749 48700691 48290638 47590619 46550627
            45780688 45550751 45520840 45870832 46270753 46830709
            47240702 47810719 48180746




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