Alert archive / Iowa / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 49, NWS Des Moines, IA

May 25, 2018Franklin County, Wright County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 25, 2018, 4:58 PM CDT for Franklin County, Wright County, Iowa. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 25, 2018, 4:58 PM CDT (21:58 UTC)
Expired: May 25, 2018, 5:45 PM CDT
In force: 47 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Franklin County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 105 km from the middle of the area, began a volume at 21:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.0 hours before the alert went out and 244 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 543 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

573 
WUUS53 KDMX 252158
SVRDMX
IAC069-197-252245-
/O.NEW.KDMX.SV.W.0049.180525T2158Z-180525T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
458 PM CDT FRI MAY 25 2018

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wright County in north central Iowa...
  Southwestern Franklin County in north central Iowa...

* Until 545 PM CDT.

* At 458 PM CDT, a severe thunderstorm was located 7 miles east of
  Big Wall Lake, or 12 miles southeast of Clarion, moving east at 15
  mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Dows, Coulter, Rowan, Bradford, Popejoy and Galt. 

# 

This includes Interstate 35 between mile markers 155 and 165.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Des Moines .

&&

LAT...LON 4263 9363 4276 9359 4272 9323 4256 9327
TIME...MOT...LOC 2158Z 278DEG 11KT 4266 9351 

HAIL...1.00IN
WIND...60MPH
 
$$

REV

2 follow-up statements

581 
WWUS53 KDMX 252214
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
514 PM CDT FRI MAY 25 2018

IAC069-197-252245-
/O.CON.KDMX.SV.W.0049.000000T0000Z-180525T2245Z/
Wright IA-Franklin IA-
514 PM CDT FRI MAY 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR EAST CENTRAL WRIGHT AND SOUTHWESTERN FRANKLIN COUNTIES...

At 514 PM CDT, a severe thunderstorm was located 10 miles east of Big
Wall Lake, or 11 miles northwest of Iowa Falls, moving southeast at
15 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Dows, Bradford and Popejoy. 

This includes Interstate 35 between mile markers 155 and 163.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Des Moines .

&&

LAT...LON 4262 9357 4272 9357 4272 9323 4256 9327
TIME...MOT...LOC 2214Z 302DEG 12KT 4264 9344 

HAIL...1.00IN
WIND...60MPH
 
$$

REV

148 
WWUS53 KDMX 252235
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
535 PM CDT FRI MAY 25 2018

IAC197-252244-
/O.CAN.KDMX.SV.W.0049.000000T0000Z-180525T2245Z/
Wright IA-
535 PM CDT FRI MAY 25 2018

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WRIGHT 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 4261 9348 4272 9349 4272 9323 4256 9327
TIME...MOT...LOC 2234Z 278DEG 11KT 4263 9335 

$$

IAC069-252245-
/O.CON.KDMX.SV.W.0049.000000T0000Z-180525T2245Z/
Franklin IA-
535 PM CDT FRI MAY 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHWESTERN FRANKLIN COUNTY...

At 534 PM CDT, a severe thunderstorm was located 8 miles northwest of
Iowa Falls, moving east at 15 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Bradford and Popejoy. 

This includes Interstate 35 between mile markers 156 and 163.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Des Moines .

&&

LAT...LON 4261 9348 4272 9349 4272 9323 4256 9327
TIME...MOT...LOC 2234Z 278DEG 11KT 4263 9335 

HAIL...1.00IN
WIND...60MPH
 
$$

REV

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 7:11 PM CDT	Special Weather Statement	DMX	Palo Alto	64 min
May 24, 8:58 PM CDT	Special Weather Statement	DMX	Kossuth, Palo Alto	47 min
May 25, 4:11 PM CDT	Severe Thunderstorm Warning	DMX	Winnebago, Worth	49 min
May 25, 4:35 PM CDT	Special Weather Statement	DMX	Franklin	40 min
May 25, 5:28 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	62 min
May 25, 5:48 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	42 min
May 25, 6:25 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	50 min
May 25, 6:31 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin	44 min
May 25, 6:57 PM CDT	Severe Thunderstorm Warning	DMX	Polk	48 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2018 Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.