Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 479
NWS Storm Prediction Center Norman OK
1050 AM CDT Mon Aug 31 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
East-central to southeast Missouri
* Effective this Monday morning and afternoon from 1050 AM until
200 PM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph possible
SUMMARY...Cluster of strong to severe storms should progress
southeast from central Missouri with a continued risk for damaging
winds.
The severe thunderstorm watch area is approximately along and 35
statute miles east and west of a line from 70 miles northwest of
Farmington MO to 30 miles south of Farmington MO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 477...WW 478...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 550. Mean storm motion vector
31030.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 479 SEVERE TSTM MO 311550Z - 311900Z
AXIS..35 STATUTE MILES EAST AND WEST OF LINE..
70NW FAM/FARMINGTON MO/ - 30S FAM/FARMINGTON MO/
..AVIATION COORDS.. 30NM E/W /46ESE COU - 22SSW FAM/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..65 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 31030.
LAT...LON 38489070 37338979 37339107 38489199
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 479 Status Report Messages:
STATUS REPORT #2 ON WW 479
VALID 311800Z - 311940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NE UNO TO
30 WNW FAM TO 30 SW BLV.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1654.
..LEITMAN..08/31/20
ATTN...WFO...LSX...
&&
STATUS REPORT FOR WS 479
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MOC093-123-179-186-187-221-311940-
MO
. MISSOURI COUNTIES INCLUDED ARE
IRON MADISON REYNOLDS
STE. GENEVIEVE ST. FRANCOIS WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 479
VALID 311635Z - 311740Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1652.
..LEITMAN..08/31/20
ATTN...WFO...LSX...
&&
STATUS REPORT FOR WS 479
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MOC055-071-073-093-099-123-179-186-187-221-311740-
MO
. MISSOURI COUNTIES INCLUDED ARE
CRAWFORD FRANKLIN GASCONADE
IRON JEFFERSON MADISON
REYNOLDS STE. GENEVIEVE ST. FRANCOIS
WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (<5%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Low (10%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
@NWSSPC
