Alert archive / Iowa / Tornado Warnings in 2016

Tornado Warning 18, NWS Des Moines, IA

November 28, 2016Bremer County, Butler County, Iowa

NWS Des Moines, IA issued this tornado warning at Nov 28, 2016, 3:59 PM CST for Bremer County, Butler County, Iowa. It was in force for 46 min. 1 report 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, 3:59 PM CST (21:59 UTC)
Expired: Nov 28, 2016, 4:45 PM CST
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bremer County, IA, Butler County, IA

The radar

The Des Moines radar (KDMX), 138 km from the middle of the area, began a volume at 21:59 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, 4:01 PM CST	TORNADO	3 Ene Parkersburg, IA	TRAINED 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, 10.0 hours before the alert went out and 207 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.

341 
WFUS53 KDMX 282159
TORDMX
IAC017-023-282245-
/O.NEW.KDMX.TO.W.0018.161128T2159Z-161128T2245Z/

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

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN BREMER COUNTY IN NORTHEASTERN IOWA...
  SOUTHEASTERN BUTLER COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 445 PM CST.

* AT 358 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR PARKERSBURG...OR 9 MILES SOUTHEAST OF
  ALLISON...MOVING NORTHEAST AT 25 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

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

* THIS DANGEROUS STORM WILL BE NEAR...
  SHELL ROCK AROUND 420 PM CST. 
  WAVERLY AROUND 430 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
WAVERLY MUNICIPAL AIRPORT.

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 4270 9244 4264 9254 4264 9255 4263 9255
      4256 9269 4256 9271 4262 9278 4280 9260
TIME...MOT...LOC 2158Z 216DEG 23KT 4263 9270 

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

$$

MF

4 follow-up statements

572 
WWUS53 KDMX 282206
SVSDMX

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

IAC017-023-282245-
/O.CON.KDMX.TO.W.0018.000000T0000Z-161128T2245Z/
BREMER IA-BUTLER IA-
406 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CST FOR
SOUTHWESTERN BREMER AND SOUTHEASTERN BUTLER COUNTIES...
    
AT 405 PM CST...A CONFIRMED TORNADO WAS LOCATED NEAR SHELL ROCK...OR
8 MILES SOUTHEAST OF ALLISON...MOVING NORTHEAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. AT 4PM...A TORNADO WITH 
         DAMAGE WAS REPORTED ABOUT 2 MILES NORTH AND 4 MILES EAST OF 
         PARKERSBURG.  
         
IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS...AND VEHICLES. 

THIS TORNADO WILL BE NEAR...
  SHELL ROCK AROUND 415 PM CST. 
  WAVERLY AROUND 425 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
WAVERLY MUNICIPAL AIRPORT.

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 4270 9244 4264 9254 4264 9255 4263 9255
      4256 9269 4256 9271 4262 9278 4280 9260
TIME...MOT...LOC 2205Z 223DEG 28KT 4267 9267 

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

$$

MF

917 
WWUS53 KDMX 282216
SVSDMX

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

IAC017-023-282245-
/O.CON.KDMX.TO.W.0018.000000T0000Z-161128T2245Z/
BREMER IA-BUTLER IA-
416 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CST FOR
SOUTHWESTERN BREMER AND SOUTHEASTERN BUTLER COUNTIES...
    
AT 416 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR SHELL ROCK...OR 10 MILES SOUTHWEST OF WAVERLY...
MOVING NORTHEAST AT 35 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

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

THIS DANGEROUS STORM WILL BE NEAR...
  SHELL ROCK AROUND 425 PM CST. 
  WAVERLY AROUND 435 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
WAVERLY MUNICIPAL AIRPORT.

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 4270 9244 4264 9254 4264 9255 4263 9255
      4258 9266 4261 9269 4266 9270 4280 9260
TIME...MOT...LOC 2216Z 235DEG 31KT 4262 9262 

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

$$

MF

279 
WWUS53 KDMX 282229
SVSDMX

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

IAC017-023-282245-
/O.CON.KDMX.TO.W.0018.000000T0000Z-161128T2245Z/
BREMER IA-BUTLER IA-
429 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CST FOR
SOUTHWESTERN BREMER AND EAST CENTRAL BUTLER COUNTIES...
    
AT 429 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER SHELL ROCK...OR NEAR WAVERLY...MOVING NORTHEAST AT
25 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. THIS STORM HAS A HISTORY OF 
         PRODUCING INTERMITTENT FUNNEL CLOUDS. 

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

THIS DANGEROUS STORM WILL BE NEAR...
  WAVERLY AROUND 445 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
WAVERLY MUNICIPAL AIRPORT.

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 4263 9255 4264 9259 4265 9262 4270 9267
      4280 9260 4270 9244 4264 9254 4264 9255
TIME...MOT...LOC 2229Z 212DEG 23KT 4269 9257 

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

$$

MF

937 
WWUS53 KDMX 282236
SVSDMX

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

IAC017-023-282245-
/O.EXP.KDMX.TO.W.0018.000000T0000Z-161128T2245Z/
BREMER IA-BUTLER IA-
436 PM CST MON NOV 28 2016

...THE TORNADO WARNING FOR SOUTHWESTERN BREMER AND EAST CENTRAL
BUTLER COUNTIES WILL EXPIRE AT 445 PM CST...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND HAS EXITED THE WARNED AREA. THEREFORE...THE WARNING WILL
BE ALLOWED TO EXPIRE.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
DES MOINES.

LAT...LON 4263 9255 4264 9259 4265 9262 4270 9267
      4280 9260 4270 9244 4264 9254 4264 9255
TIME...MOT...LOC 2235Z 216DEG 23KT 4272 9254 

$$

MF

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, 4:19 PM CST	Tornado Warning Tornado observed	DMX	Poweshiek	41 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.