Severe Thunderstorm Warning 22, NWS Des Moines, IA

864 
WWUS53 KDMX 252242
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
542 PM CDT Mon May 25 2020

IAC099-127-252315-
/O.CON.KDMX.SV.W.0022.000000T0000Z-200525T2315Z/
Marshall IA-Jasper IA-
542 PM CDT Mon May 25 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR SOUTHERN MARSHALL AND NORTHEASTERN JASPER COUNTIES...

At 542 PM CDT, a severe thunderstorm was located 7 miles east of
Baxter, or 8 miles north of Newton, moving north at 25 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Baxter, Melbourne, Rhodes, Laurel, Haverhill and Ferguson. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4177 9286 4175 9316 4197 9321 4198 9285
TIME...MOT...LOC 2242Z 171DEG 22KT 4182 9301 

HAIL...0.75IN
WIND...60MPH
 
$$

Krull

755 
WWUS53 KDMX 252253
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
553 PM CDT Mon May 25 2020

IAC099-252302-
/O.CAN.KDMX.SV.W.0022.000000T0000Z-200525T2315Z/
Jasper IA-
553 PM CDT Mon May 25 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JASPER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4186 9286 4186 9318 4197 9321 4198 9285
TIME...MOT...LOC 2252Z 173DEG 27KT 4190 9302 

$$

IAC127-252315-
/O.CON.KDMX.SV.W.0022.000000T0000Z-200525T2315Z/
Marshall IA-
553 PM CDT Mon May 25 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR SOUTHERN MARSHALL COUNTY...

At 552 PM CDT, a severe thunderstorm was located 8 miles northeast of
Baxter, or 10 miles southwest of Marshalltown, moving north at 30
mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Melbourne, Rhodes, Laurel, Haverhill and Ferguson. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4186 9286 4186 9318 4197 9321 4198 9285
TIME...MOT...LOC 2252Z 173DEG 27KT 4190 9302 

HAIL...0.75IN
WIND...60MPH
 
$$

Krull

966 
WWUS53 KDMX 252301
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
601 PM CDT Mon May 25 2020

IAC127-252311-
/O.CAN.KDMX.SV.W.0022.000000T0000Z-200525T2315Z/
Marshall IA-
601 PM CDT Mon May 25 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MARSHALL COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 4186 9286 4186 9318 4197 9321 4198 9285
TIME...MOT...LOC 2301Z 173DEG 27KT 4197 9303 

$$

Krull

Area Forecast Discussion
National Weather Service Des Moines IA
242 PM CDT Mon May 25 2020

.DISCUSSION.../Tonight through Monday/
Issued at 242 PM CDT Mon May 25 2020

Another day and another remnant MCV lifting north through Kansas
complicating the severe weather potential for this afternoon and
evening. Widespread showers and thunderstorms have developed over
southwest IA, eastern Kansas and much of Missouri this afternoon. A
few low topped storms are already rotating north of Lawrence and in
the northeast quad of the MCV. Splitting storms are also evident
near Kansas City which is sensible given the deep unidirectional
flow with some modest speed shear. This entire region of storms will
lift into southern and central Iowa over the next several hours and
maintain an isolated tornado or local wind damage potential. Any
tornado threat will likely be landspout in nature given the low
level stretching potential and lack of overall surface flow. CAM
solutions appear to be resolving the current MCV better than
yesterdays event and the currents storm's anvils are not shadowing
upstream unstable regions which would promote stronger updrafts
reaching southern Iowa, unlike Sunday when anvils dropped
temperatures and instability ahead of approaching storms. Saturating
profiles and weakening mid-level lapse rates will lower the hail
threat today.

The rich Gulf moisture stream continues to feed into Iowa with PWATs
in excess of 1.5 inches will and keep the potential for locally
heavy rain. That said, like Sunday, storms will be progressive with
a break overnight. Expect a few locations to receive 2 to 3 inches
or rainfall but that is not forecast to be widespread. Therefore, no
Flash Flood Headlines at this time. The western trough will
transition into a upper low drifting south into the Southern Plains
into Wednesday before beginning to slowly shift east Thursday then
finally beginning to shear out with any remnant energy moving
quickly to the east. The Gulf of Mexico flow into Iowa will
continue into Thursday before the upper low pushes far enough east
to cut the flow from the state. The surface boundary will remain
over Iowa through this time and combined with repeated pushes of
theta-e advection and short wave fragments, will result in
periodic shower and thunderstorms chances. The severe weather
threat during this time will be low but a cumulative heavy rain
threat with river flooding or flash flooding becoming possible at
some point.

Little change to the extended as the well advertised Canadian High
arriving Friday with drier and less humid air and will feature high
temperatures into the upper 60s to mid 70s through Sunday.

&&

.AVIATION.../For the 18Z TAFS through 18Z Tuesday afternoon/
Issued at 1249 PM CDT Mon May 25 2020

MVFR cigs over northern Iowa this afternoon while mainly VFR south
early. Thunderstorms will be on the increase late afternoon and
into the evening. MVFR/IFR cigs are possible after the storm pass
late tonight into Tuesday morning near KMCW/KFOD. Additional
showers and thunderstorms may arrive mid to late Tuesday morning.

&&

.HYDROLOGY...
Issued at 235 PM CDT Mon May 25 2020

Numerous rounds of thunderstorms through Thursday may lead to a
cumulative heavy rainfall threat that could lead to rivers rising
and flowing out of their banks. At this time, the greatest
potential is over central and south central Iowa including the Des
Moines, Raccoon and Iowa Rivers and associated tributaries. Local
rainfall totals during this time of 3 to 5 inches are possible
with many locations receiving 1 to 2 inches.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

DISCUSSION...Donavon
AVIATION...Donavon
HYDROLOGY...Donavon

Hazardous Weather Outlook
National Weather Service Des Moines IA
228 PM CDT Mon May 25 2020

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-261930-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
228 PM CDT Mon May 25 2020

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

Rain showers and thunderstorms are expected. An isolated severe
storm producing quarter size hail and damaging wind gust is
possible. Torrential rainfall is possible with some storms, which
may lead to a localized flooding threat. This may also cause rises
in local creeks and streams.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Multiple rounds of rain showers and thunderstorms are forecast for
this upcoming week. Exact severe threats if any will be better
determined in the coming days.

.SPOTTER INFORMATION STATEMENT...

Spotter reports may be needed tonight. Rainfall reports are always
appreciated.

Special Weather Statement
National Weather Service Des Moines IA
506 PM CDT Mon May 25 2020

IAZ023>028-033>039-044>050-057>062-070>075-081>086-092>097-260015-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda,
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton,
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake,
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy,
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley,
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo,
Cedar Falls, Denison, Carroll, Jefferson, Boone, Ames,
Marshalltown, Tama, Toledo, Traer, Dysart, Gladbrook, Audubon,
Exira, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee,
Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart,
Adair, Fontanelle, Winterset, Earlham, Indianola, Norwalk,
Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola,
Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr,
Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville,
and Bloomfield
506 PM CDT Mon May 25 2020

...Scattered Strong Thunderstorms across Central and Southern Iowa
early this Evening...

Scattered showers and thunderstorms continue to move south to
north through central and southern Iowa early this evening. Some
of the stronger storms may produce wind gusts to 45 mph and up to
penny sized hail.

Those with outdoor holiday activities should be prepared to seek
shelter if threatening weather approaches.

Small