Alert archive / Illinois / Special Weather Statements in 2016

Special Weather Statement, NWS Quad Cities, IA

October 12, 2016Henderson County, Illinois

NWS Quad Cities, IA issued this special weather statement at Oct 12, 2016, 12:55 AM CDT for Henderson County, Illinois. It was in force for 65 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
Oct 12, 2016, 12:55 AM CDT (05:55 UTC)
Expired
Oct 12, 2016, 2:00 AM CDT
In force
65 min
Issued by
NWS Quad Cities, IA

County Henderson County, IL

The radar

The Quad Cities radar (KDVN), 110 km from the middle of the area, began a volume at 05:56 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, 5.9 hours before the alert went out and 113 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 2016-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2034 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
234 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Oct 11, 11:44 PM CDT, 1 hour 11 minutes earlier.

Area forecast discussion, Oct 11, 11:44 PM CDT, 1 hour 11 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Oct 11, 10:05 PM CDT, 2 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1005 PM CDT TUE OCT 11 2016

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-130315-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
1005 PM CDT TUE OCT 11 2016

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...TONIGHT

SCATTERED THUNDERSTORMS WILL AFFECT NORTHEAST MISSOURI...FAR
SOUTHEAST IOWA AND WEST CENTRAL ILLINOIS TONIGHT. THE MAIN
HAZARDS FROM THESE STORMS WILL BE SMALL HAIL...DANGEROUS
LIGHTNING AND HEAVY DOWNPOURS. ISOLATED THUNDERSTORMS WILL BE
POSSIBLE OVER MUCH OF THE OUTLOOK AREA LATE TONIGHT INTO EARLY
WEDNESDAY MORNING. SEVERE WEATHER IS NOT EXPECTED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

WEDNESDAY NIGHT INTO EARLY THURSDAY MORNING...FROST IS POSSIBLE
OVER MOST OF THE OUTLOOK AREA.

THURSDAY NIGHT...PATCHY FROST IS POSSIBLE IN FAR NORTHWEST ILLINOIS.

SATURDAY INTO SATURDAY NIGHT...THUNDERSTORMS ARE LIKELY AS A COLD
FRONT PUSHES ACROSS THE AREA. IT IS TOO EARLY TO DETERMINE THE
SEVERE WEATHER RISK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT.

SHEETS

In the hours before

Local storm report, Oct 11, 10:46 PM CDT, 2 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1046 PM CDT TUE OCT 11 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1044 PM     HAIL             2 ESE KAHOKA            40.42N 91.69W
10/11/2016  M0.25 INCH       CLARK              MO   TRAINED SPOTTER

&&

DLS
Local storm report, Oct 12, 12:06 AM CDT, 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1206 AM CDT WED OCT 12 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1203 AM     HAIL             KEOKUK                  40.41N 91.40W
10/12/2016  E0.75 INCH       LEE                IA   TRAINED SPOTTER

            LOTS OF PENNY TO NEAR QUARTER SIZE HAIL

&&

DLS
Special weather statement, Oct 12, 12:09 AM CDT, 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
1209 AM CDT WED OCT 12 2016

ILC067-071-120600-
HANCOCK-HENDERSON-
1209 AM CDT WED OCT 12 2016

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN HANCOCK AND SOUTH
CENTRAL HENDERSON COUNTIES UNTIL 100 AM CDT...

AT 1209 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR FERRIS...OR 7
MILES NORTHEAST OF KEOKUK...MOVING NORTHEAST AT 30 MPH.

NICKEL SIZE HAIL IS POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
KEOKUK...CARTHAGE...HAMILTON...LA HARPE...DALLAS CITY...FERRIS...
ADRIAN...DISCO...BURNSIDE...COLUSA...LOMAX...FOUNTAIN GREEN...
ELVASTON...WEBSTER AND CAMP EASTMAN.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4031 9132 4038 9140 4039 9139 4040 9137
      4045 9138 4050 9136 4070 9108 4056 9090
      4051 9091
TIME...MOT...LOC 0509Z 228DEG 26KT 4046 9128

RP KINNEY
Special weather statement, Oct 12, 12:55 AM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
1255 AM CDT WED OCT 12 2016

ILC067-071-109-187-120700-
WARREN-HANCOCK-HENDERSON-MCDONOUGH-
1255 AM CDT WED OCT 12 2016

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN WARREN...NORTHEASTERN
HANCOCK...HENDERSON AND NORTHWESTERN MCDONOUGH COUNTIES UNTIL 200 AM
CDT...

AT 1255 AM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER DISCO...OR 14
MILES SOUTH OF BURLINGTON...MOVING NORTHEAST AT 30 MPH.

WINDS IN EXCESS OF 30 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
LA HARPE...ROSEVILLE...DALLAS CITY...STRONGHURST...KIRKWOOD...
BLANDINSVILLE...CARMAN...BIGGSVILLE...TERRE HAUTE...RARITAN...
SCIOTA...DISCO...LITTLE SWAN LAKE...GREENBUSH...LOMAX...FOUNTAIN
GREEN...MEDIA...OLENA...WEBSTER AND PONEMAH.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4064 9120 4065 9115 4067 9112 4070 9111
      4071 9111 4099 9078 4068 9046 4045 9101
TIME...MOT...LOC 0555Z 232DEG 24KT 4062 9104

RP KINNEY

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 12, 3:45 AM CDTFrost AdvisoryDVNCedar, Clinton, Henry, Jefferson, Louisa, Muscatine and 3 more29 hr
Oct 12, 3:45 AM CDTFreeze WarningDVNBenton, Buchanan, Delaware, Dubuque, Iowa, Jackson and 4 more29 hr
Oct 12, 12:09 AM CDTSpecial Weather StatementDVNHancock51 min

Nearby

Special Weather Statements in Illinois, 2016Every special weather statement 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.