Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 422
NWS Storm Prediction Center Norman OK
1005 PM CDT Sat Aug 8 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
northeast Nebraska
eastern South Dakota
* Effective this Saturday night and Sunday morning from 1005 PM
until 500 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 80
mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Mostly multicell lines of storms capable of damaging wind
and some hail will continue through northern Nebraska and central
through eastern South Dakota tonight.
The severe thunderstorm watch area is approximately along and 100
statute miles east and west of a line from 35 miles northwest of
Aberdeen SD to 40 miles south southwest of Yankton SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU2).
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 421...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24035.
...Dial
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 422 SEVERE TSTM NE SD 090305Z - 091000Z
AXIS..100 STATUTE MILES EAST AND WEST OF LINE..
35NW ABR/ABERDEEN SD/ - 40SSW YKN/YANKTON SD/
..AVIATION COORDS.. 85NM E/W /33NW ABR - 45E ONL/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24035.
LAT...LON 45799686 42379572 42379964 45790101
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 422 Status Report Messages:
STATUS REPORT #2 ON WW 422
VALID 090730Z - 090840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNE OFK
TO 45 WNW HON TO 50 NE ABR.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1430
..MOSIER..08/09/20
ATTN...WFO...OAX...FSD...ABR...
&&
STATUS REPORT FOR WS 422
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC119-143-167-090840-
IA
. IOWA COUNTIES INCLUDED ARE
LYON OSCEOLA SIOUX
$$
MNC081-101-105-117-133-090840-
MN
. MINNESOTA COUNTIES INCLUDED ARE
LINCOLN MURRAY NOBLES
PIPESTONE ROCK
$$
NEC027-090840-
NE
. NEBRASKA COUNTIES INCLUDED ARE
CEDAR
$$
SDC005-011-025-027-029-035-037-039-051-057-059-061-067-073-077-
079-083-087-091-097-099-101-109-111-115-125-127-135-090840-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BEADLE BROOKINGS CLARK
CLAY CODINGTON DAVISON
DAY DEUEL GRANT
HAMLIN HAND HANSON
HUTCHINSON JERAULD KINGSBURY
LAKE LINCOLN MCCOOK
MARSHALL MINER MINNEHAHA
MOODY ROBERTS SANBORN
SPINK TURNER UNION
YANKTON
$$
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.
$$
STATUS REPORT #1 ON WW 422
VALID 090455Z - 090540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 WSW ONL
TO 35 W 9V9 TO 25 SSW PIR.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1429
..DEAN..08/09/20
ATTN...WFO...OAX...FSD...ABR...
&&
STATUS REPORT FOR WS 422
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC003-027-107-139-090540-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ANTELOPE CEDAR KNOX
PIERCE
$$
SDC003-005-009-011-013-015-017-023-025-027-029-035-037-039-043-
049-051-053-057-059-061-065-067-069-073-075-077-079-085-087-091-
097-109-111-115-117-119-125-135-090540-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
AURORA BEADLE BON HOMME
BROOKINGS BROWN BRULE
BUFFALO CHARLES MIX CLARK
CLAY CODINGTON DAVISON
DAY DEUEL DOUGLAS
FAULK GRANT GREGORY
HAMLIN HAND HANSON
HUGHES HUTCHINSON HYDE
JERAULD JONES KINGSBURY
LAKE LYMAN MCCOOK
MARSHALL MINER ROBERTS
SANBORN SPINK STANLEY
SULLY TURNER YANKTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (50%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (20%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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
