Severe Thunderstorm Warning 100, NWS Glasgow, MT

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
900 AM MDT FRI JUL 20 2001

...NO CHANGES TO CURRENT FORECAST...

STORMS ARE STARTING EARLY AGAIN TODAY AGAIN WITH SEVERE WEATHER
PARAMETERS IN PLACE AS WELL. NEW ETA 500MB VORT PATTERN INDICATING THIS
FIRST ROUND WILL GO THROUGH HERE OVER THE NEXT 2 TO 4 HOURS...WITH MAYBE
A RE-FIRE LATER IN THE AFTERNOON/EVENING. SPC/S MODERATE RISK LOOKS
GOOD. A SPECIAL WEATHER STATEMENT HAS BEEN ISSUED IN ANTICIPATION
OF THE VOLATILE CONDITIONS EXPECTED FOR TODAY. JAMBA

EXTENDED...MID RANGE MODELS SUGGESTING SLIGHT SHIFT IN PATTERN WITH
BASE OF PACIFIC TROF CUTTING OFF AND FLOW ACROSS NORTHERN TIER OF
STATE BECOMING MORE ZONAL UNDER OMEGA BLOCK OVER CANADA. WITH FLOW
TURNING WEST SHOULD CUT OFF MOISTURE FEED OVER THE MOUNTAINS FOR
DRIER PATTERN FOR EASTERN MONTANA BY MID WEEK. ONLY CHANGE TO
EXTENDED WILL BE TO ADD SATURDAY NIGHT PERIOD TO EMPHASIZE CHANGE OF
THUNDERSTORMS THAT NIGHT. EBERT

KGGW /083 062/088 064/085 057/082 058/083 058/083 058/084
      TTTTTBT  90543/9033323
KGDV /085 065/089 064/085 060/084 060/084 060/084 057/085
      TTTTTBT  90543/9033323

MTZ016>027-059>062-202200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
840 AM MDT FRI JUL 20 2001

...A GOOD CHANCE OF SEVERE WEATHER ACROSS NORTHEAST MONTANA TODAY...

A MOIST...UNSTABLE AIRMASS IN PLACE ACROSS NORTHEAST MONTANA COMBINED
WITH AN UPPER LEVEL DISTURBANCE PUSHING ACROSS THE AREA TODAY WILL
BRING THUNDERSTORMS...SOME OF THEM SEVERE. ANY SEVERE THUNDERSTORM
WILL BRING LARGE HAIL...DAMAGING WINDS AND TORRENTIAL RAIN. THE
SEVERE THUNDERSTORM POTENTIAL STARTED THIS MORNING AND WILL LIKELY
LAST INTO THE EVENING HOURS TONIGHT.

ANYONE WITH OUTDOOR ACTIVITIES PLANNED TODAY SHOULD LISTEN TO NOAA
WEATHER RADIO...OR ANOTHER MEDIA OUTLET...TO KEEP POST ED ON ANY WATCHES
OR WARNINGS THAT MAY BE ISSUED TODAY.

THIS INFORMATION CAN ALSO BE OBTAINED FROM OUR WEB SITE AT:
HTTP://WWW.WRH.NOAA.GOV/GLASGOW

TFJ