Alert archive / Illinois / Special Weather Statements in 2009

Special Weather Statement, NWS Lincoln, IL

August 17, 2009Cass County, Illinois

NWS Lincoln, IL issued this special weather statement at Aug 17, 2009, 2:49 PM CDT for Cass County, Illinois. It was in force for 41 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 17, 2009, 2:49 PM CDT (19:49 UTC)
Expired
Aug 17, 2009, 3:30 PM CDT
In force
41 min
Issued by
NWS Lincoln, IL

County Cass County, IL

The radar

The Lincoln radar (KILX), 86 km from the middle of the area, began a volume at 19:48 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

Lincoln, IL (KILX), launched 12:00Z, 7.8 hours before the alert went out and 148 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, Lincoln, IL at 12:00Z on 2009-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 70 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, Lincoln, IL at 12:00Z on 2009-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.193958Sfc1 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
70 J/kg
Mixed-layer CIN
-195 J/kg
Mixed-layer LCL
899 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
-20 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 Lincoln, IL wrote its last area forecast discussion before this special weather statement went out at Aug 17, 12:34 PM CDT, 2 hours 15 minutes earlier.

Area forecast discussion, Aug 17, 12:34 PM CDT, 2 hours 15 minutes before
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Hazardous weather outlook, Aug 17, 11:47 AM CDT, 3 hours 2 minutes before
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<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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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In the hours before

Local storm report, Aug 17, 10:36 AM CDT, 4 hours 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1036 AM CDT MON AUG 17 2009

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

0700 AM     HEAVY RAIN       2 SW ATHENS             39.94N 89.75W
08/17/2009  M1.54 INCH       MENARD             IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       2 N ATHENS              39.99N 89.72W
08/17/2009  M1.74 INCH       MENARD             IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       JACKSONVILLE            39.73N 90.23W
08/17/2009  M1.90 INCH       MORGAN             IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       LEWISTOWN               40.40N 90.16W
08/17/2009  M1.58 INCH       FULTON             IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       MARIETTA                40.50N 90.39W
08/17/2009  M2.10 INCH       FULTON             IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       2 SW PETERSBURG         39.99N 89.88W
08/17/2009  M2.53 INCH       MENARD             IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       WINCHESTER              39.63N 90.46W
08/17/2009  M3.02 INCH       SCOTT              IL   CO-OP OBSERVER

            24-HOUR TOTAL

0200 AM     HEAVY RAIN       BROADLANDS              39.91N 88.00W
08/17/2009  M2.81 INCH       CHAMPAIGN          IL   MESONET

            COCORAHS REPORT

0800 AM     HEAVY RAIN       3 SW EMDEN              40.27N 89.53W
08/17/2009  M2.04 INCH       LOGAN              IL   MESONET

            24-HOUR TOTAL. COCORAHS REPORT

0900 AM     HEAVY RAIN       5 NW ATLANTA            40.31N 89.30W
08/17/2009  M2.00 INCH       LOGAN              IL   MESONET

            COCORAHS REPORT

0600 AM     HEAVY RAIN       MURRAYVILLE             39.58N 90.25W
08/17/2009  M1.91 INCH       MORGAN             IL   MESONET

            COCORAHS REPORT

0630 AM     HEAVY RAIN       WAVERLY                 39.59N 89.95W
08/17/2009  M1.55 INCH       MORGAN             IL   MESONET

            COCORAHS REPORT

&&

GEELHART
Special weather statement, Aug 17, 2:49 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
249 PM CDT MON AUG 17 2009

ILZ036-040-041-047-048-172030-
CASS-FULTON-MASON-MENARD-SCHUYLER-
249 PM CDT MON AUG 17 2009

...SIGNIFICANT WEATHER ALERT FOR CASS...NORTHWESTERN MENARD...
SOUTHEASTERN SCHUYLER...SOUTHWESTERN FULTON AND SOUTHWESTERN MASON
COUNTIES UNTIL 330 PM CDT...

AT 247 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR BEARDSTOWN...MOVING NORTHEAST AT 30 MPH.

WINDS OF 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  VIRGINIA...
  BROWNING...
  CHANDLERVILLE...
  BATH...
  KILBOURNE...

OTHER LOCATIONS AFFECTED INCLUDE...SNICARTE AND OAKFORD.

PEOPLE NEAR THESE LOCATIONS SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS...AND BE PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

LAT...LON 4011 9065 4031 9021 4005 8980 3988 9029
      3989 9044
TIME...MOT...LOC 1949Z 240DEG 26KT 3998 9037

GEELHART

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 3:03 AM CDTFlash Flood WatchILXCass, DeWitt, Fulton, Knox, Logan, McLean and 11 more12 hr
Aug 17, 3:23 PM CDTSevere Thunderstorm WarningILXCass, Logan, Mason, Menard, Morgan, Sangamon and 1 more52 min
Aug 17, 4:33 PM CDTAreal Flood AdvisoryILXLogan, Sangamon3 hr
Aug 17, 4:48 PM CDTAreal Flood AdvisoryILXDeWitt, Logan, McLean, Tazewell, Woodford3 hr
Aug 17, 5:18 PM CDTAreal Flood AdvisoryILXDeWitt, Macon3 hr
Aug 17, 6:41 PM CDTAreal Flood AdvisoryILXVermilion4 hr

Nearby

Special Weather Statements in Illinois, 2009Every special weather statement in 2009

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.