Alert archive / Illinois / Special Weather Statements in 2016

Special Weather Statement, NWS Quad Cities, IA

July 19, 2016Henderson County, McDonough County, Warren County, Illinois

NWS Quad Cities, IA issued this special weather statement at Jul 19, 2016, 5:42 PM CDT for Henderson County, McDonough County, Warren County, Illinois. It was in force for 63 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
Jul 19, 2016, 5:42 PM CDT (22:42 UTC)
Expired
Jul 19, 2016, 6:45 PM CDT
In force
63 min
Issued by
NWS Quad Cities, IA

Counties Henderson County, IL, McDonough County, IL, Warren County, IL

The radar

The Lincoln radar (KILX), 131 km from the middle of the area, began a volume at 22:43 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 12:00Z, 10.7 hours before the alert went out and 135 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 2016-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 368 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 12:00Z on 2016-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.19395878Sfc1 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
368 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
1025 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 19, 4:01 PM CDT, 1 hour 41 minutes earlier.

Area forecast discussion, Jul 19, 4:01 PM CDT, 1 hour 41 minutes before
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Hazardous weather outlook, Jul 19, 5:16 PM CDT, 26 minutes before
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In the hours before

Local storm report, Jul 19, 1:42 PM CDT, 4 hours before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
142 PM CDT TUE JUL 19 2016

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

0140 PM     HEAVY RAIN       4 SE OELWEIN            42.63N 91.86W
07/19/2016  M1.27 INCH       BUCHANAN           IA   TRAINED SPOTTER

            SINCE 7 AM.

&&

DLS
Local storm report, Jul 19, 3:07 PM CDT, 2 hours 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
307 PM CDT TUE JUL 19 2016

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

0307 PM     TSTM WND GST     SIGOURNEY               41.33N 92.21W
07/19/2016  E45 MPH          KEOKUK             IA   TRAINED SPOTTER

            ESTIMATED WINDS OF 40 TO 45 MPH. VERY HEAVY RAIN WAS ALSO
            FALLING.

&&

DC
Special weather statement, Jul 19, 3:17 PM CDT, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
317 PM CDT TUE JUL 19 2016

IAC107-192115-
KEOKUK-
317 PM CDT TUE JUL 19 2016

...A STRONG THUNDERSTORM WILL AFFECT EASTERN KEOKUK COUNTY UNTIL 415
PM CDT...

AT 314 PM CDT...A STRONG THUNDERSTORM WAS OVER SIGOURNEY...MOVING
NORTHEAST AT 10 MPH.

LOCALIZED WIND GUSTS OF 50 TO 55 MPH ARE POSSIBLE WITH THIS STORM.

SOME LOCATIONS IMPACTED INCLUDE...SIGOURNEY...SOUTH ENGLISH...
HARPER...KINROSS...KEOTA...OLLIE...TALLEYRAND...LAKE BELVA DEER
PARK...LANCASTER AND KEOKUK COUNTY EXPO.

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

LAT...LON 4119 9216 4137 9228 4151 9195 4124 9195
TIME...MOT...LOC 2014Z 243DEG 9KT 4132 9219

08
Special weather statement, Jul 19, 3:30 PM CDT, 2 hours 12 minutes before
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Special weather statement, Jul 19, 4:39 PM CDT, 1 hour 3 minutes before
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Special weather statement, Jul 19, 5:42 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 3:17 PM CDTSpecial Weather StatementDVNKeokuk58 min
Jul 19, 3:24 PM CDTSevere Thunderstorm WarningDVNVan Buren57 min
Jul 19, 3:30 PM CDTSpecial Weather StatementDVNMcDonough, Warren60 min
Jul 19, 4:16 PM CDTFlash Flood WarningDVNMcDonough6 hr

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.