Alert archive / Iowa / Tornado Warnings in 2019

Tornado Warning 4, NWS Des Moines, IA

May 29, 2019Pocahontas County, Iowa

NWS Des Moines, IA issued this tornado warning at May 29, 2019, 5:14 PM CDT for Pocahontas County, Iowa. It was in force for 31 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 29, 2019, 5:14 PM CDT (22:14 UTC)
Expired: May 29, 2019, 5:45 PM CDT
In force: 31 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Pocahontas County, IA

The radar

The Des Moines radar (KDMX), 139 km from the middle of the area, began a volume at 22:15 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 12:00Z, 10.2 hours before the alert went out and 223 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: 4 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

079 
WFUS53 KDMX 292214
TORDMX
IAC151-292245-
/O.NEW.KDMX.TO.W.0004.190529T2214Z-190529T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
514 PM CDT Wed May 29 2019

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Northeastern Pocahontas County in northwestern Iowa...

* Until 545 PM CDT.

* At 514 PM CDT, a thunderstorm capable of producing a tornado was 
  located 2 miles north of Pocahontas, moving northeast at 5 mph.

  HAZARD...Tornado.

  SOURCE...Weather spotters reported a rapidly rotating wall cloud 2 
           miles northeast of Pocahontas at 5:09pm.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Pocahontas County, including the following
  locations... Plover and Rolfe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

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 4275 9450 4275 9469 4290 9467 4290 9447
TIME...MOT...LOC 2214Z 228DEG 6KT 4280 9462 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Ansorge

1 follow-up statement

877 
WWUS53 KDMX 292243
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
543 PM CDT Wed May 29 2019

IAC151-292251-
/O.EXP.KDMX.TO.W.0004.000000T0000Z-190529T2245Z/
Pocahontas IA-
543 PM CDT Wed May 29 2019

...THE TORNADO WARNING FOR NORTHEASTERN POCAHONTAS COUNTY WILL EXPIRE
AT 545 PM CDT...
                
The storm which prompted the warning has weakened and no longer 
appears capable of producing a tornado. Therefore, the warning will 
be allowed to expire.

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

LAT...LON 4275 9450 4275 9469 4290 9467 4290 9447
TIME...MOT...LOC 2241Z 228DEG 6KT 4283 9458 

$$

Ansorge

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:09 PM CDT	Flash Flood Warning	DMX	Ringgold, Taylor	6 hr
May 28, 9:48 PM CDT	River Flood Warning	DMX	Appanoose	44 hr
May 28, 10:05 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	40 min
May 28, 10:56 PM CDT	Areal Flood Warning	DMX	Appanoose, Davis, Lucas, Mahaska, Monroe, Wapello and 1 more	24 hr
May 29, 4:46 PM CDT	Tornado Warning	DMX	Pocahontas	14 min
May 29, 4:59 PM CDT	Tornado Warning	DMX	Pocahontas	16 min
May 29, 5:54 PM CDT	Tornado Warning	DMX	Poweshiek	25 min
May 29, 6:24 PM CDT	Tornado Warning Tornado observed	DMX	Humboldt, Pocahontas	21 min

Nearby

Tornado Warnings in Iowa, 2019 Every tornado warning in 2019 Tornadoes 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.