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 272
NWS Storm Prediction Center Norman OK
645 PM CDT Mon May 20 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northwest and north central Iowa
South central and southeast Minnesota
* Effective this Monday night from 645 PM until Midnight CDT.
* Primary threats include...
Scattered damaging wind gusts to 60 mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Scattered thunderstorm development is expected this
evening along a slow moving front across southern Minnesota and
northern Iowa. The storm environment will favor a mix of multicell
clusters and storms with supercell structure capable of producing
large hail of 1-1.5 inches in diameter and damaging outflow gusts up
to 60 mph.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 35 miles east of
Rochester MN to 50 miles west of Storm Lake IA. 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 268...WW 269...WW
270...WW 271...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 50 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27020.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 272 SEVERE TSTM IA MN 202345Z - 210500Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
35E RST/ROCHESTER MN/ - 50W SLB/STORM LAKE IA/
..AVIATION COORDS.. 40NM N/S /14W ODI - 68SSE FSD/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..50 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27020.
LAT...LON 43279180 41949621 43259621 44579180
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 272 Status Report Messages:
STATUS REPORT #2 ON WW 272
VALID 210230Z - 210340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 860
..BENTLEY..05/21/24
ATTN...WFO...FSD...DMX...ARX...MPX...
&&
STATUS REPORT FOR WS 272
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-033-035-041-047-059-063-067-081-089-091-093-109-131-141-
143-147-149-151-161-167-189-193-195-197-210340-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CERRO GORDO CHEROKEE
CLAY CRAWFORD DICKINSON
EMMET FLOYD HANCOCK
HOWARD HUMBOLDT IDA
KOSSUTH MITCHELL O'BRIEN
OSCEOLA PALO ALTO PLYMOUTH
POCAHONTAS SAC SIOUX
WINNEBAGO WOODBURY WORTH
WRIGHT
$$
MNC013-039-043-045-047-063-091-099-109-147-157-161-165-210340-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BLUE EARTH DODGE FARIBAULT
FILLMORE FREEBORN JACKSON
MARTIN MOWER OLMSTED
STEELE WABASHA WASECA
WATONWAN
$$
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.
$$
STATUS REPORT #1 ON WW 272
VALID 210050Z - 210140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BENTLEY..05/21/24
ATTN...WFO...FSD...DMX...ARX...MPX...
&&
STATUS REPORT FOR WS 272
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-033-035-041-047-059-063-067-081-089-091-093-109-131-141-
143-147-149-151-161-167-189-193-195-197-210140-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CERRO GORDO CHEROKEE
CLAY CRAWFORD DICKINSON
EMMET FLOYD HANCOCK
HOWARD HUMBOLDT IDA
KOSSUTH MITCHELL O'BRIEN
OSCEOLA PALO ALTO PLYMOUTH
POCAHONTAS SAC SIOUX
WINNEBAGO WOODBURY WORTH
WRIGHT
$$
MNC013-039-043-045-047-063-091-099-109-147-157-161-165-210140-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BLUE EARTH DODGE FARIBAULT
FILLMORE FREEBORN JACKSON
MARTIN MOWER OLMSTED
STEELE WABASHA WASECA
WATONWAN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (<5%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
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 (70%)
|
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 
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