Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 113, NWS Des Moines, IA

August 4, 20164 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 4, 2016, 5:05 PM CDT for 4 counties in Iowa. It was in force for 40 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
Aug 4, 2016, 5:05 PM CDT (22:05 UTC)
Expired
Aug 4, 2016, 5:45 PM CDT
In force
40 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Franklin County, IA, Hamilton County, IA, Hardin County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 95 km from the middle of the area, began a volume at 22:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 4, 4:44 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 248 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 2016-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 500 joules per kilogram.LCLLFCEL10008507005003002001001 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 2016-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939Sfc1 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
500 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
970 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

079 
WUUS53 KDMX 042205
SVRDMX
IAC069-079-083-197-042245-
/O.NEW.KDMX.SV.W.0113.160804T2205Z-160804T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
505 PM CDT THU AUG 4 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HARDIN COUNTY IN CENTRAL IOWA...
  NORTHEASTERN HAMILTON COUNTY IN CENTRAL IOWA...
  SOUTHEASTERN WRIGHT COUNTY IN NORTH CENTRAL IOWA...
  SOUTHERN FRANKLIN COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 545 PM CDT

* AT 505 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BIG WALL
  LAKE...OR 13 MILES SOUTHEAST OF CLARION...MOVING EAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

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

* LOCATIONS IMPACTED INCLUDE...
  IOWA FALLS...ELDORA...ACKLEY...ALDEN...DOWS...STEAMBOAT ROCK...
  BRADFORD...POPEJOY...OWASA...IOWA FALLS MUNICIPAL AIRPORT...ACKLEY
  MUNICIPAL AIRPORT AND PINE LAKE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4256 9369 4271 9355 4259 9302 4247 9303
      4247 9301 4240 9300 4232 9300
TIME...MOT...LOC 2205Z 290DEG 36KT 4259 9355 

HAIL...<.75IN
WIND...60MPH
 
$$

COGIL
2 follow-up statements
705 
WWUS53 KDMX 042234
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
534 PM CDT THU AUG 4 2016

IAC069-079-083-197-042245-
/O.CON.KDMX.SV.W.0113.000000T0000Z-160804T2245Z/
HARDIN IA-HAMILTON IA-WRIGHT IA-FRANKLIN IA-
534 PM CDT THU AUG 4 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHERN HARDIN...NORTHEASTERN HAMILTON...SOUTHEASTERN WRIGHT AND
SOUTHERN FRANKLIN COUNTIES...

AT 533 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER IOWA FALLS...
MOVING EAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

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

LOCATIONS IMPACTED INCLUDE...
IOWA FALLS...ELDORA...ACKLEY...ALDEN...STEAMBOAT ROCK...BRADFORD...
POPEJOY...OWASA...IOWA FALLS MUNICIPAL AIRPORT...ACKLEY MUNICIPAL
AIRPORT AND PINE LAKE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4249 9350 4261 9350 4268 9344 4259 9302
      4247 9303 4247 9301 4240 9300 4232 9300
TIME...MOT...LOC 2233Z 289DEG 30KT 4251 9324 

HAIL...<.75IN
WIND...60MPH
 
$$

COGIL
929 
WWUS53 KDMX 042244
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
544 PM CDT THU AUG 4 2016

IAC069-079-083-197-042254-
/O.EXP.KDMX.SV.W.0113.000000T0000Z-160804T2245Z/
HARDIN IA-HAMILTON IA-WRIGHT IA-FRANKLIN IA-
544 PM CDT THU AUG 4 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN HARDIN...NORTHEASTERN
HAMILTON...SOUTHEASTERN WRIGHT AND SOUTHERN FRANKLIN COUNTIES WILL
EXPIRE AT 545 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
PORTIONS OF NORTH CENTRAL AND CENTRAL IOWA.

LAT...LON 4249 9350 4261 9350 4268 9344 4259 9302
      4247 9303 4247 9301 4240 9300 4232 9300
TIME...MOT...LOC 2244Z 290DEG 36KT 4248 9313 

$$

COGIL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 10:09 AM CDTSpecial Weather StatementDMXCerro Gordo36 min
Aug 4, 10:37 AM CDTSevere Thunderstorm WarningDMXButler, Franklin38 min
Aug 4, 11:10 AM CDTSevere Thunderstorm WarningDMXButler, Franklin, Grundy65 min
Aug 4, 12:20 PM CDTSpecial Weather StatementDMXBlack Hawk55 min
Aug 4, 1:28 PM CDTHeat AdvisoryDMXAdair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more6 hr
Aug 4, 1:42 PM CDTSpecial Weather StatementDMXBlack Hawk48 min
Aug 4, 2:00 PM CDTSpecial Weather StatementDMXDallas30 min
Aug 4, 4:23 PM CDTSevere Thunderstorm WarningDMXJasper, Marshall37 min
Aug 4, 4:50 PM CDTSevere Thunderstorm WarningDMXTama55 min
Aug 4, 5:58 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer, Butler47 min
Aug 4, 6:52 PM CDTSevere Thunderstorm WarningDMXGrundy, Jasper, Marshall, Poweshiek, Story, Tama68 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2016Every 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.