SPC Severe Thunderstorm Watch 275

WW 275 SEVERE TSTM IA 211115Z – 211800Z
WW 0275 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 275
NWS Storm Prediction Center Norman OK
615 AM CDT Tue May 21 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and southern Iowa * Effective this Tuesday morning and afternoon from 615 AM until 100 PM CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Clusters of thunderstorms -- including an organized bowing
complex initially over eastern NE -- will pose a threat mainly for
severe gusts while crossing the watch area from west to east. A
tornado or two cannot be ruled out, especially near an outflow
boundary draped across central/south-central IA. Isolated large
hail is possible. This is a precursor to the main severe-weather
threat expected later today, for which we have a "Moderate Risk"
outlook. The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 80 miles west of Des
Moines IA to 25 miles south southeast of Cedar Rapids IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU5). 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 274... AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
26045. ...Edwards 

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SPC Severe Thunderstorm Watch 274

WW 274 SEVERE TSTM IA KS NE 210430Z – 211200Z
WW 0274 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 274
NWS Storm Prediction Center Norman OK
1130 PM CDT Mon May 20 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Extreme western Iowa Extreme north central Kansas Central into eastern Nebraska * Effective this Monday night and Tuesday morning from 1130 PM until 700 AM CDT. * Primary threats include... Widespread damaging winds and isolated significant gusts to 75 mph likely Scattered large hail events to 1.5 inches in diameter likely A tornado or two possible SUMMARY...Ongoing storms with a hail/wind threat may persist for a
couple more hours across eastern Nebraska/western Iowa, while storms
well to the west will grow upscale into a larger/bowing convective
system overnight into central then eastern Nebraska. Damaging wind
swaths up to 75 mph will be the main threat, along with large hail
up to 1.5 inches in diameter and a tornado or two with embedded
circulations. The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 60 miles south
southwest of Broken Bow NE to 20 miles northeast of Omaha NE. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4). 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...This severe thunderstorm watch replaces
severe thunderstorm watch number 271. Watch number 271 will not
be in effect after 1130 PM CDT. CONTINUE...WW 269...WW 272...WW
273... AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
25035. ...Thompson 

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