Alert archive / Iowa / Special Weather Statements in 2012

Special Weather Statement, NWS Quad Cities, IA

June 11, 2012Buchanan County, Iowa

NWS Quad Cities, IA issued this special weather statement at Jun 11, 2012, 1:44 AM CDT for Buchanan County, Iowa. It was in force for 61 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, 2012, 1:44 AM CDT (06:44 UTC)
Expired
Jun 11, 2012, 2:45 AM CDT
In force
61 min
Issued by
NWS Quad Cities, IA

County Buchanan County, IA

The radar

The Quad Cities radar (KDVN), 142 km from the middle of the area, began a volume at 06:47 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, 6.7 hours before the alert went out and 146 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 00:00Z on 2012-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2012-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
28 J/kg
Mixed-layer CIN
-467 J/kg
Mixed-layer LCL
1987 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jun 10, 11:47 PM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jun 10, 11:47 PM CDT, 1 hour 57 minutes before
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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Hazardous weather outlook, Jun 10, 4:44 AM CDT, 21 hours before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
444 AM CDT SUN JUN 10 2012

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-111000-
BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO-
CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL-
HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA-
JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA-
MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL-
SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL-
WASHINGTON IA-WHITESIDE IL-
444 AM CDT SUN JUN 10 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT PUSHING INTO THE AREA WILL PRODUCE THUNDERSTORMS IN THE
OUTLOOK AREA LATER TONIGHT AND INTO EARLY MONDAY MORNING. LATEST
INDICATIONS SUGGEST THAT MOST OF THE STORMS WILL BE WEAKENING AFTER
MIDNIGHT AS THEY COME ACROSS THE AREA FROM WEST TO EAST. BUT A FEW
STRONG TO SEVERE STORMS MAY STILL OCCUR LATE SUNDAY EVENING GENERALLY
IN AREAS WEST OF A LINE FROM MANCHESTER IOWA...TO CEDAR RAPIDS...AND
TO FAIRFIELD IN SOUTHEAST IOWA. LARGE HAIL AND DAMAGING WINDS WOULD
BE THE MAIN THREATS WITH ANY SEVERE STORM THAT MOVES INTO OR DEVELOPS
IN THE OUTLOOK AREA TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS SATURDAY. IT IS TOO EARLY
TO DETERMINE THE TIMING OR INTENSITY OF THESE STORMS.

.SPOTTER INFORMATION STATEMENT...

THERE IS A LOW CHANCE THAT SPOTTER ACTIVATION WILL BE NEEDED TONIGHT
WEST OF THE MISSISSIPPI RIVER.

12/DMD

In the hours before

Special weather statement, Jun 11, 1:44 AM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
144 AM CDT MON JUN 11 2012

IAZ040-041-051-052-110745-
BENTON-BUCHANAN-DELAWARE-LINN-
144 AM CDT MON JUN 11 2012

...STRONG THUNDERSTORMS MOVING ACROSS NORTHEASTERN IOWA...

AT 139 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM FAIRBANK TO
BRANDON...MOVING EAST AT 40 MPH.

* THUNDERSTORMS WILL BE NEAR...
  ROWLEY...INDEPENDENCE AND HAZLETON AROUND 150 AM CDT...
  WALKER AROUND 155 AM CDT...
  STANLEY AND QUASQUETON AROUND 200 AM CDT...
  WINTHROP AND AURORA AROUND 205 AM CDT...
  LAMONT AND MASONVILLE AROUND 215 AM CDT...

WIND GUSTS OF 40 TO 50 MPH MAY OCCUR WITH THESE STORMS. THESE WIND
GUSTS COULD BLOW AROUND OUTDOOR FURNITURE AND OTHER LIGHT OBJECTS.
SMALL BRANCHES MAY ALSO FALL.

SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED.

LAT...LON 4265 9141 4264 9140 4232 9139 4227 9206
      4231 9207 4246 9207 4247 9209 4264 9209
      4265 9208
TIME...MOT...LOC 0640Z 267DEG 28KT 4263 9200 4230 9195

12

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 3:14 AM CDTSpecial Weather StatementDVNHenry, Jefferson, Lee, Louisa, Van Buren61 min
Jun 11, 3:56 AM CDTSpecial Weather StatementDVNDes Moines, Louisa, Muscatine64 min

Nearby

Special Weather Statements in Iowa, 2012Every 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.