Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 486
NWS Storm Prediction Center Norman OK
935 PM CDT Sat Sep 5 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and Eastern Iowa
Southern Minnesota
* Effective this Saturday night and Sunday morning from 935 PM
until 300 AM CDT.
* Primary threats include...
Widespread large hail and isolated very large hail events to 2.5
inches in diameter likely
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Thunderstorms are expected to intensify this evening
across southern Minnesota and build southeastward into central and
eastern Iowa. A few intense thunderstorms are expected, capable of
very large hail and perhaps a gusty/damaging wind threat.
The severe thunderstorm watch area is approximately along and 70
statute miles north and south of a line from 50 miles west of
Redwood Falls MN to 20 miles east northeast of Cedar Rapids IA. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30030.
...Hart
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 486
NWS Storm Prediction Center Norman OK
935 PM CDT Sat Sep 5 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and Eastern Iowa
Southern Minnesota
* Effective this Saturday night and Sunday morning from 935 PM
until 300 AM CDT.
* Primary threats include...
Widespread large hail and isolated very large hail events to 2.5
inches in diameter likely
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Thunderstorms are expected to intensify this evening
across southern Minnesota and build southeastward into central and
eastern Iowa. A few intense thunderstorms are expected, capable of
very large hail and perhaps a gusty/damaging wind threat.
The severe thunderstorm watch area is approximately along and 70
statute miles north and south of a line from 50 miles west of
Redwood Falls MN to 20 miles east northeast of Cedar Rapids IA. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30030.
...Hart
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW6
WW 486 SEVERE TSTM IA MN 060235Z - 060800Z
AXIS..70 STATUTE MILES NORTH AND SOUTH OF LINE..
50W RWF/REDWOOD FALLS MN/ - 20ENE CID/CEDAR RAPIDS IA/
..AVIATION COORDS.. 60NM N/S /42W RWF - 30NNE IOW/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 30030.
LAT...LON 45569610 43009136 40989136 43539610
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 486 Status Report Messages:
STATUS REPORT #1 ON WW 486
VALID 060430Z - 060540Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..SPC..09/06/20
ATTN...WFO...DVN...DMX...FSD...ARX...MPX...
&&
STATUS REPORT FOR WS 486
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC011-013-015-017-019-021-023-025-031-033-037-041-055-059-063-
065-067-069-075-079-081-083-089-091-095-099-103-105-107-109-113-
123-127-131-141-143-147-151-153-157-169-171-183-187-189-195-197-
060540-
IA
. IOWA COUNTIES INCLUDED ARE
BENTON BLACK HAWK BOONE
BREMER BUCHANAN BUENA VISTA
BUTLER CALHOUN CEDAR
CERRO GORDO CHICKASAW CLAY
DELAWARE DICKINSON EMMET
FAYETTE FLOYD FRANKLIN
GRUNDY HAMILTON HANCOCK
HARDIN HOWARD HUMBOLDT
IOWA JASPER JOHNSON
JONES KEOKUK KOSSUTH
LINN MAHASKA MARSHALL
MITCHELL O'BRIEN OSCEOLA
PALO ALTO POCAHONTAS POLK
POWESHIEK STORY TAMA
WASHINGTON WEBSTER WINNEBAGO
WORTH WRIGHT
$$
MNC013-015-023-033-043-047-063-067-073-079-081-083-085-091-093-
099-101-103-105-117-127-129-133-143-147-151-161-165-173-
060540-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BLUE EARTH BROWN CHIPPEWA
COTTONWOOD FARIBAULT FREEBORN
JACKSON KANDIYOHI LAC QUI PARLE
LE SUEUR LINCOLN LYON
MCLEOD MARTIN MEEKER
MOWER MURRAY NICOLLET
NOBLES PIPESTONE REDWOOD
RENVILLE ROCK SIBLEY
STEELE SWIFT WASECA
WATONWAN YELLOW MEDICINE
$$
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
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
High (80%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (60%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
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
