Alert archive / Iowa / Special Weather Statements in 2012

Special Weather Statement, NWS Quad Cities, IA

May 25, 2012Benton County, Iowa

NWS Quad Cities, IA issued this special weather statement at May 25, 2012, 7:49 PM CDT for Benton County, Iowa. It was in force for 26 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: May 25, 2012, 7:49 PM CDT (00:49 UTC)
Expired: May 25, 2012, 8:15 PM CDT
In force: 26 min
Issued by: NWS Quad Cities, IA

County Benton County, IA

The radar

The Quad Cities radar (KDVN), 114 km from the middle of the area, began a volume at 00:51 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, 0.8 hours before the alert went out and 120 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: 1813 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 490 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this special weather statement went out at May 25, 6:59 PM CDT, 50 minutes earlier.

Area forecast discussion, May 25, 6:59 PM CDT, 50 minutes before

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Hazardous weather outlook, May 25, 4:31 AM CDT, 15 hours 18 minutes before

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In the hours before

Special weather statement, May 25, 7:49 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
749 PM CDT FRI MAY 25 2012

IAZ051-052-063-064-260115-
BENTON-IOWA-JOHNSON-LINN-
749 PM CDT FRI MAY 25 2012

...THUNDERSTORM WITH SMALL HAIL...

AT 746 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MARENGO...MOVING EAST AT 50 MPH.

* THE THUNDERSTORM WILL BE NEAR...
  AMANA AND NORWAY AROUND 755 PM CDT...
  WALFORD AND FAIRFAX AROUND 800 PM CDT...
  SWISHER AROUND 805 PM CDT...
  ELY...SHUEYVILLE AND 7 MILES SOUTH OF CEDAR RAPIDS AROUND 810 PM
  CDT...
  6 MILES NORTH OF LAKE MACBRIDE STATE PARK AND 7 MILES NORTH OF
  SOLON AROUND 815 PM CDT...

ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 35 MPH AND BRIEF
HEAVY RAIN CAN BE EXPECTED WITH THIS STORM.

LAT...LON 4209 9175 4180 9149 4170 9217 4189 9229
TIME...MOT...LOC 0048Z 258DEG 43KT 4182 9200

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 10:07 PM CDT	Special Weather Statement	DVN	Delaware	23 min
May 26, 12:07 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Scott	38 min
May 26, 12:08 AM CDT	Special Weather Statement	DVN	Buchanan, Delaware	52 min
May 26, 12:17 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	58 min
May 26, 12:27 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	63 min
May 26, 2:22 AM CDT	Special Weather Statement	DVN	Buchanan, Delaware, Dubuque	113 min
May 26, 3:02 AM CDT	Special Weather Statement	DVN	Delaware, Dubuque, Jackson, Jones	58 min
May 26, 4:33 AM CDT	Severe Thunderstorm Warning	DVN	Stephenson	27 min
May 26, 5:38 AM CDT	Special Weather Statement	DVN	Stephenson	22 min

Nearby

Special Weather Statements in Iowa, 2012 Every special weather statement in 2012

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.