Alert archive / Iowa / Special Weather Statements in 2019

Special Weather Statement, NWS Des Moines, IA

May 24, 2019Madison County, Iowa

NWS Des Moines, IA issued this special weather statement at May 24, 2019, 1:07 AM CDT for Madison County, Iowa. It was in force for 23 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 24, 2019, 1:07 AM CDT (06:07 UTC)
Expired: May 24, 2019, 1:30 AM CDT
In force: 23 min
Issued by: NWS Des Moines, IA

County Madison County, IA

The radar

The Des Moines radar (KDMX), 71 km from the middle of the area, began a volume at 06:09 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

Omaha, NE (KOAX), launched 00:00Z, 6.1 hours before the alert went out and 183 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1659 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

207 
WWUS83 KDMX 240607
SPSDMX

Special Weather Statement
National Weather Service Des Moines IA
107 AM CDT Fri May 24 2019
 
IAZ071-072-082-240630-
Adair IA-Union IA-Madison IA-
107 AM CDT Fri May 24 2019

...Line of Storms May Produce Dime to Nickel Size Hail and 
Strong Winds..

At 107 AM CDT, Doppler radar was tracking a strong thunderstorm near
Green Valley Lake, or 8 miles north of Creston, moving northeast at
50 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Creston, Winterset, Green Valley Lake, Orient, Lorimor, Macksburg,
Green Valley Lake State Park, Creston Municipal Airport and
Winterset-Madison County Airport.

LAT...LON 4126 9444 4146 9400 4116 9397 4116 9401
      4110 9402 4098 9445
TIME...MOT...LOC 0607Z 239DEG 43KT 4118 9440 

$$

Kotenberg

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 8:06 PM CDT	River Flood Watch	DMX	Davis, Wapello	14 hr
May 23, 11:53 PM CDT	Special Weather Statement	DMX	Adams	37 min
May 24, 12:40 AM CDT	Special Weather Statement	DMX	Adair	35 min
May 24, 2:04 AM CDT	Special Weather Statement	DMX	Jasper, Marion	41 min
May 24, 2:34 AM CDT	Special Weather Statement	DMX	Marshall, Tama	26 min
May 24, 3:07 AM CDT	Special Weather Statement	DMX	Jasper, Marion, Warren	38 min
May 24, 3:51 AM CDT	Flash Flood Watch	DMX	Adair, Adams, Appanoose, Clarke, Davis, Decatur and 16 more	23 hr
May 24, 4:17 AM CDT	Flash Flood Warning	DMX	Adair, Adams, Cass	6 hr
May 24, 4:27 AM CDT	River Flood Warning	DMX	Polk	10 days
May 24, 5:20 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Ringgold, Taylor, Union	40 min
May 24, 5:57 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Clarke, Decatur, Madison, Ringgold, Union and 1 more	48 min
May 24, 6:24 AM CDT	River Flood Warning	DMX	Humboldt	17 days
May 24, 6:26 AM CDT	River Flood Warning	DMX	Polk	8 days
May 24, 6:46 AM CDT	Special Weather Statement	DMX	Lucas, Marion, Warren, Wayne	44 min
May 24, 7:07 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Marshall, Polk, Warren	38 min
May 24, 7:21 AM CDT	River Flood Warning	DMX	Dallas, Polk	13 hr
May 24, 7:23 AM CDT	Special Weather Statement	DMX	Appanoose, Davis, Mahaska, Marion, Monroe, Wapello	67 min
May 24, 7:40 AM CDT	Special Weather Statement	DMX	Poweshiek	35 min
May 24, 7:44 AM CDT	Areal Flood Warning	DMX	Story	6 hr
May 24, 7:46 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Marshall, Tama	31 min
May 24, 7:54 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	21 min
May 24, 9:50 AM CDT	River Flood Warning	DMX	Polk	24 hr
May 24, 10:16 AM CDT	Flash Flood Warning	DMX	Adair	3 hr
May 24, 10:33 AM CDT	River Flood Warning	DMX	Davis, Wapello	47 days
May 24, 10:35 AM CDT	River Flood Watch	DMX	Black Hawk	23 hr
May 24, 10:35 AM CDT	River Flood Watch	DMX	Black Hawk	34 hr
May 24, 10:36 AM CDT	River Flood Warning	DMX	Tama	6 days
May 24, 10:36 AM CDT	River Flood Warning	DMX	Black Hawk	8 days
May 24, 10:36 AM CDT	River Flood Warning	DMX	Webster	11 days
May 24, 10:36 AM CDT	River Flood Warning	DMX	Boone, Hamilton, Webster	3 days
May 24, 10:36 AM CDT	River Flood Warning	DMX	Dallas, Greene	7 days

Nearby

Special Weather Statements in Iowa, 2019 Every special weather statement in 2019

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.