Alert archive / Iowa / Tornado Warnings in 2016

Tornado Warning 19, NWS Des Moines, IA

November 28, 2016Poweshiek County, Iowa

NWS Des Moines, IA issued this tornado warning at Nov 28, 2016, 4:19 PM CST for Poweshiek County, Iowa. It was in force for 41 min. 4 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, 4:19 PM CST (22:19 UTC)
Expired: Nov 28, 2016, 5:00 PM CST
In force: 41 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Poweshiek County, IA

The radar

The Des Moines radar (KDMX), 108 km from the middle of the area, began a volume at 22:19 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

Time	Report	Where	Remark
Nov 28, 4:19 PM CST	TORNADO	5 Ssw Montezuma, IA	PICTURE OF CONFIRMED TORNADO TAKEN AT US 63 AND PARKIN AVE IN MAHASKA COUNTY LOOKING NORTH SENT IN FROM SPOTTER. TIME RADAR ESTIMATED. DELAYED REPORT. .
Nov 28, 4:25 PM CST	FUNNEL CLOUD	1 E Montezuma, IA	CEDAR FALLS DISPATCH RELAYED REPORT FROM OFFICER OF A FUNNEL CLOUD SW OF HIS POSITION. AT THE TIME OF THE REPORT THE OFFICER WAS JUST SOUTH OF I-80 ON HIGHWAY 21 LOOKING TO THE SW. LOCATION ESTIMATED BASED ON RADAR. .
Nov 28, 4:25 PM CST	TORNADO	1 E Montezuma, IA	CEDAR FALLS DISPATCH RELAYED REPORT FROM OFFICER OF A FUNNEL CLOUD SW OF HIS POSITION. AT THE TIME OF THE REPORT THE OFFICER WAS JUST SOUTH OF I-80 ON HIGHWAY 21 LOOKING TO THE SW. LOCATION ESTIMATED BASED ON RADAR. .
Nov 28, 4:30 PM CST	TORNADO	1 Ene Montezuma, IA	PATROL OFFICER HAS CONFIRMED TORNADO ON THE GROUND, PERIODICALLY LIFTING AND THEN LOWERING AGAIN. OFFICER LOCATION AROUND I-80 AND HIGHWAY 21 LOOKING SW. REPORT RELAYED BY CEDAR FALLS DISPATCH. LOCATION ESTIMATED VIA RADAR. .

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, 10.3 hours before the alert went out and 161 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: 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.

998 
WFUS53 KDMX 282219
TORDMX
IAC157-282300-
/O.NEW.KDMX.TO.W.0019.161128T2219Z-161128T2300Z/

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

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN POWESHIEK COUNTY IN CENTRAL IOWA...

* UNTIL 500 PM CST.

* AT 418 PM CST...A TORNADO PRODUCING STORM WAS LOCATED NEAR
  MONTEZUMA...MOVING NORTHEAST AT 25 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR CONFIRMED TORNADO. 

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

* THIS TORNADIC STORM WILL BE NEAR...
  MONTEZUMA AROUND 430 PM CST. 
  BROOKLYN AROUND 450 PM CST. 
  VICTOR AROUND 500 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
VICTOR...DEEP RIVER...GUERNSEY AND HARTWICK.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 195 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4155 9230 4151 9251 4151 9261 4154 9265
      4178 9239 4180 9230
TIME...MOT...LOC 2218Z 235DEG 22KT 4154 9257 

TORNADO...OBSERVED
HAIL...<.75IN

$$

BEERENDS

3 follow-up statements

427 
WWUS53 KDMX 282230
SVSDMX

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

IAC157-282300-
/O.CON.KDMX.TO.W.0019.000000T0000Z-161128T2300Z/
POWESHIEK IA-
430 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CST FOR
SOUTHEASTERN POWESHIEK COUNTY...
    
AT 429 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER MONTEZUMA...MOVING NORTHEAST AT 20 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. A FUNNEL CLOUD WAS REPORTED JUST 
         EAST OF MONTEZUMA AT 425 PM CDT.  

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

THIS DANGEROUS STORM WILL BE NEAR...
  VICTOR AROUND 500 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
VICTOR...DEEP RIVER...GUERNSEY AND HARTWICK.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 195 AND 204.
 
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.

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. IF YOU
CANNOT SAFELY DRIVE AWAY FROM THE TORNADO...AS A LAST RESORT...EITHER
PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN
IN A LOW LYING AREA AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4155 9230 4151 9251 4153 9258 4156 9263
      4178 9239 4180 9230
TIME...MOT...LOC 2229Z 239DEG 17KT 4157 9250 

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

$$

BEERENDS

435 
WWUS53 KDMX 282235
SVSDMX

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

IAC157-282300-
/O.CON.KDMX.TO.W.0019.000000T0000Z-161128T2300Z/
POWESHIEK IA-
435 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CST FOR
SOUTHEASTERN POWESHIEK COUNTY...
        
AT 435 PM CST...A CONFIRMED TORNADO WAS LOCATED NEAR MONTEZUMA...
MOVING NORTHEAST AT 25 MPH.

HAZARD...TORNADO. 

SOURCE...CONFIRMED TORNADO. A TORNADO HAS BEEN CONFIRMED ON THE 
         GROUND AT 433 PM CDT. 

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

THIS TORNADO WILL BE NEAR...
  BROOKLYN AROUND 450 PM CST. 
  VICTOR AROUND 500 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
VICTOR...DEEP RIVER...GUERNSEY AND HARTWICK.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 195 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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.

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. IF YOU
CANNOT SAFELY DRIVE AWAY FROM THE TORNADO...AS A LAST RESORT...EITHER
PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN
IN A LOW LYING AREA AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4158 9230 4154 9251 4154 9256 4157 9260
      4178 9239 4180 9230
TIME...MOT...LOC 2235Z 235DEG 22KT 4159 9246 

TORNADO...OBSERVED
HAIL...<.75IN

$$

BEERENDS

155 
WWUS53 KDMX 282256
SVSDMX

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

IAC157-282306-
/O.EXP.KDMX.TO.W.0019.000000T0000Z-161128T2300Z/
POWESHIEK IA-
456 PM CST MON NOV 28 2016

...THE TORNADO WARNING FOR SOUTHEASTERN POWESHIEK COUNTY WILL EXPIRE
AT 500 PM CST...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4158 9230 4154 9251 4154 9256 4157 9260
      4178 9239 4180 9230
TIME...MOT...LOC 2256Z 235DEG 22KT 4166 9232 

$$

BEERENDS

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 28, 3:13 PM CST	Special Weather Statement	DMX	Grundy	62 min
Nov 28, 3:16 PM CST	Special Weather Statement	DMX	Mahaska	59 min
Nov 28, 3:33 PM CST	Tornado Warning	DMX	Butler, Grundy	27 min
Nov 28, 3:43 PM CST	Tornado Warning	DMX	Grundy	32 min
Nov 28, 3:53 PM CST	Tornado Warning	DMX	Mahaska, Poweshiek	37 min
Nov 28, 3:54 PM CST	Tornado Warning	DMX	Marshall, Tama	18 min
Nov 28, 3:59 PM CST	Tornado Warning	DMX	Bremer, Butler	46 min
Nov 28, 4:41 PM CST	Tornado Warning	DMX	Davis	13 min
Nov 28, 5:11 PM CST	Special Weather Statement	DMX	Wapello	34 min

Nearby

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