Alert archive / Iowa / Tornado Warnings in 2016

Tornado Warning 14, NWS Des Moines, IA

November 28, 2016Butler County, Grundy County, Iowa

NWS Des Moines, IA issued this tornado warning at Nov 28, 2016, 3:33 PM CST for Butler County, Grundy County, Iowa. It was in force for 27 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Nov 28, 2016, 3:33 PM CST (21:33 UTC)
Expired
Nov 28, 2016, 4:00 PM CST
In force
27 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Butler County, IA, Grundy County, IA

The radar

The Des Moines radar (KDMX), 123 km from the middle of the area, began a volume at 21:35 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.

What was reported inside it

TimeReportWhereRemark
Nov 28, 3:45 PM CSTTORNADOParkersburg, IAREPORT OF SOME BUILDING DAMAGE IN NW PART OF PARKERSBURG.
Nov 28, 4:01 PM CSTTORNADO3 Ene Parkersburg, IATRAINED SPOTTER REPORTED A TORNADO ON THE GROUND AT THE TIME OF THE REPORT. REPORT RELAYED BY CEDAR FALLS DISPATCH. .

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.6 hours before the alert went out and 212 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2016-11-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2016-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 310 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
666 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
310 m²/s²
0-3 km storm-relative helicity
333 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

541 
WFUS53 KDMX 282133
TORDMX
IAC023-075-282200-
/O.NEW.KDMX.TO.W.0014.161128T2133Z-161128T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
333 PM CST MON NOV 28 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL GRUNDY COUNTY IN CENTRAL IOWA...
  SOUTHEASTERN BUTLER COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 400 PM CST.

* AT 332 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER PARKERSBURG...OR 11 MILES NORTH OF GRUNDY
  CENTER...MOVING NORTHEAST AT 25 MPH.

  HAZARD...TORNADO. 

  SOURCE...LAW ENFORCEMENT REPORTED FUNNEL CLOUD. 

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS...AND VEHICLES. 

* THIS DANGEROUS STORM WILL BE NEAR...
  PARKERSBURG AROUND 340 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE STOUT
AND NEW HARTFORD.

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.

&&

LAT...LON 4249 9278 4254 9287 4270 9271 4257 9256
TIME...MOT...LOC 2132Z 215DEG 21KT 4253 9279 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MF
1 follow-up statement
834 
WWUS53 KDMX 282150
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
350 PM CST MON NOV 28 2016

IAC023-075-282200-
/O.CON.KDMX.TO.W.0014.000000T0000Z-161128T2200Z/
GRUNDY IA-BUTLER IA-
350 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CST FOR NORTH
CENTRAL GRUNDY AND SOUTHEASTERN BUTLER COUNTIES...
    
AT 350 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER PARKERSBURG...OR 11 MILES SOUTH OF ALLISON...MOVING
NORTHEAST AT 20 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS...AND VEHICLES. 

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
NORTH CENTRAL GRUNDY AND SOUTHEASTERN BUTLER COUNTIES...INCLUDING THE
FOLLOWING LOCATIONS: STOUT AND NEW HARTFORD.

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.

&&

LAT...LON 4249 9278 4254 9287 4270 9271 4257 9256
TIME...MOT...LOC 2150Z 211DEG 19KT 4259 9274 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MF

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 28, 3:13 PM CSTSpecial Weather StatementDMXGrundy62 min
Nov 28, 3:16 PM CSTSpecial Weather StatementDMXMahaska59 min
Nov 28, 3:43 PM CSTTornado WarningDMXGrundy32 min
Nov 28, 3:53 PM CSTTornado WarningDMXMahaska, Poweshiek37 min
Nov 28, 3:54 PM CSTTornado WarningDMXMarshall, Tama18 min
Nov 28, 3:59 PM CSTTornado WarningDMXBremer, Butler46 min
Nov 28, 4:19 PM CSTTornado Warning Tornado observedDMXPoweshiek41 min
Nov 28, 4:41 PM CSTTornado WarningDMXDavis13 min
Nov 28, 5:11 PM CSTSpecial Weather StatementDMXWapello34 min

Nearby

Tornado Warnings in Iowa, 2016Every tornado warning in 2016Tornadoes in 2016

Sources

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