Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 41, NWS Des Moines, IA

June 11, 2016Bremer County, Butler County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 11, 2016, 2:47 AM CDT for Bremer County, Butler County, Iowa. It was in force for 43 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: Jun 11, 2016, 2:47 AM CDT (07:47 UTC)
Expired: Jun 11, 2016, 3:30 AM CDT
In force: 43 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bremer County, IA, Butler County, IA

The radar

The Des Moines radar (KDMX), 149 km from the middle of the area, began a volume at 07:47 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

Davenport, (KDVN), launched 00:00Z, 7.8 hours before the alert went out and 210 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: 238 J/kg
Mixed-layer CIN: -204 J/kg
Mixed-layer LCL: 2073 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

257 
WUUS53 KDMX 110747
SVRDMX
IAC017-023-110830-
/O.NEW.KDMX.SV.W.0041.160611T0747Z-160611T0830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
247 AM CDT SAT JUN 11 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BUTLER COUNTY IN NORTH CENTRAL IOWA...
  WESTERN BREMER COUNTY IN NORTHEASTERN IOWA...

* UNTIL 330 AM CDT

* AT 245 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
  OF NASHUA...OR 11 MILES SOUTH OF CHARLES CITY...MOVING SOUTHEAST AT
  30 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  WAVERLY...DENVER...CLARKSVILLE...SHELL ROCK...JANESVILLE...
  PLAINFIELD AND WAVERLY MUNICIPAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4264 9262 4291 9274 4291 9245 4264 9227
TIME...MOT...LOC 0745Z 331DEG 27KT 4291 9262 

HAIL...1.00IN
WIND...60MPH
 
$$

ANGLE

2 follow-up statements

083 
WWUS53 KDMX 110812
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
312 AM CDT SAT JUN 11 2016

IAC017-023-110830-
/O.CON.KDMX.SV.W.0041.000000T0000Z-160611T0830Z/
BUTLER IA-BREMER IA-
312 AM CDT SAT JUN 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT
FOR NORTHEASTERN BUTLER AND WESTERN BREMER COUNTIES...

AT 311 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WAVERLY...
MOVING SOUTHEAST AT 25 MPH.

HAZARD...60 MPH WIND GUSTS AND NICKEL SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
WAVERLY...DENVER...CLARKSVILLE...SHELL ROCK...JANESVILLE...
PLAINFIELD AND WAVERLY MUNICIPAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4264 9262 4291 9274 4291 9245 4264 9227
TIME...MOT...LOC 0811Z 330DEG 24KT 4275 9251 

HAIL...0.88IN
WIND...60MPH
 
$$

ANGLE

266 
WWUS53 KDMX 110832
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
332 AM CDT SAT JUN 11 2016

IAC017-023-110841-
/O.EXP.KDMX.SV.W.0041.000000T0000Z-160611T0830Z/
BUTLER IA-BREMER IA-
332 AM CDT SAT JUN 11 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BUTLER AND
WESTERN BREMER COUNTIES HAS EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.  HOWEVER GUSTY
WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4264 9262 4291 9274 4291 9245 4264 9227
TIME...MOT...LOC 0830Z 331DEG 27KT 4275 9251 

$$

ANGLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:50 PM CDT	Special Weather Statement	DMX	Franklin	55 min
Jun 10, 8:46 PM CDT	Special Weather Statement	DMX	Palo Alto	44 min
Jun 10, 8:50 PM CDT	Special Weather Statement	DMX	Winnebago, Worth	55 min
Jun 10, 9:23 PM CDT	Special Weather Statement	DMX	Kossuth	37 min
Jun 10, 9:53 PM CDT	Special Weather Statement	DMX	Hancock	52 min
Jun 10, 10:18 PM CDT	Special Weather Statement	DMX	Cerro Gordo, Winnebago, Worth	42 min
Jun 10, 10:33 PM CDT	Flash Flood Warning	DMX	Cerro Gordo, Winnebago, Worth	6 hr
Jun 10, 10:43 PM CDT	Special Weather Statement	DMX	Wright	47 min
Jun 11, 12:25 AM CDT	Special Weather Statement	DMX	Black Hawk, Grundy, Hardin, Tama	65 min
Jun 11, 1:09 AM CDT	Special Weather Statement	DMX	Poweshiek, Tama	51 min
Jun 11, 2:28 AM CDT	Special Weather Statement	DMX	Bremer	47 min
Jun 11, 3:31 AM CDT	Special Weather Statement	DMX	Black Hawk	59 min
Jun 11, 4:37 AM CDT	Special Weather Statement	DMX	Jasper, Polk, Poweshiek	53 min
Jun 11, 8:26 AM CDT	Special Weather Statement	DMX	Wayne	64 min
Jun 11, 9:08 AM CDT	Special Weather Statement	DMX	Warren	52 min
Jun 11, 10:37 AM CDT	Special Weather Statement	DMX	Clarke	53 min
Jun 11, 4:09 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	51 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2016 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.