Alert archive / Illinois / Special Weather Statements in 2019

Special Weather Statement, NWS Quad Cities, IA

October 1, 2019Jo Daviess County, Stephenson County, Illinois

NWS Quad Cities, IA issued this special weather statement at Oct 1, 2019, 9:49 PM CDT for Jo Daviess County, Stephenson 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
Oct 1, 2019, 9:49 PM CDT (02:49 UTC)
Expired
Oct 1, 2019, 10:30 PM CDT
In force
41 min
Issued by
NWS Quad Cities, IA

Counties Jo Daviess County, IL, Stephenson County, IL

The radar

The Quad Cities radar (KDVN), 104 km from the middle of the area, began a volume at 02:48 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

Davenport, (KDVN), launched 00:00Z, 2.8 hours before the alert went out and 99 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 2019-10-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1498 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2019-10-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
1498 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1058 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

As transmitted.

963 
WWUS83 KDVN 020249
SPSDVN

Special Weather Statement
National Weather Service Quad Cities IA/IL
949 PM CDT Tue Oct 1 2019

ILC015-085-177-IAC097-020330-
Jo Daviess-Carroll-Stephenson-Jackson-
949 PM CDT Tue Oct 1 2019

...A STRONG THUNDERSTORM WILL AFFECT JO DAVIESS...NORTHERN CARROLL...
STEPHENSON AND EAST CENTRAL JACKSON COUNTIES UNTIL 1030 PM CDT...

At 949 PM CDT, a strong thunderstorm was located over Woodbine, or 16
miles southeast of Galena, moving east at 55 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Freeport, Lena, Stockton, Warren, Hanover, Pearl City, Elizabeth,
Cedarville, Davis, Woodbine, Dakota, German Valley, Scales Mound,
Apple River, Winslow, Rock City, Ridott, Nora, Schapville and
Massbach.

Torrential rainfall is also occurring with this storm. Minor flooding
of low lying areas, creeks, streams and urban areas is possible. If
you encounter water over a roadway, do not drive through it.

LAT...LON 4250 8940 4220 8940 4220 8969 4217 8969
      4213 9029 4248 9036 4251 9005
TIME...MOT...LOC 0249Z 258DEG 47KT 4232 9014 

$$

Ervin

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 1, 7:25 PM CDTSevere Thunderstorm WarningDVNJackson33 min
Oct 1, 7:48 PM CDTSpecial Weather StatementDVNDubuque42 min
Oct 1, 8:09 PM CDTSevere Thunderstorm WarningDVNDubuque, Jackson34 min
Oct 1, 8:57 PM CDTSpecial Weather StatementDVNCedar, Jones, Linn48 min
Oct 1, 9:08 PM CDTFlash Flood WarningDVNDelaware, Dubuque, Jones6 hr
Oct 1, 9:39 PM CDTFlash Flood WarningDVNDubuque, Jackson6 hr
Oct 2, 4:54 AM CDTRiver Flood WarningDVNDelaware, Jones38 hr
Oct 2, 7:49 AM CDTRiver Flood WarningDVNJackson3 days
Oct 2, 7:49 AM CDTRiver Flood WarningDVNBenton, Iowa58 hr
Oct 2, 8:46 AM CDTRiver Flood WarningDVNDubuque5 days
Oct 2, 8:46 AM CDTRiver Flood WarningDVNDubuque, Jackson21 days
Oct 2, 9:54 AM CDTRiver Flood WatchDVNClinton, Scott6 days
Oct 2, 11:01 AM CDTRiver Flood WarningDVNClinton16 days
Oct 2, 11:01 AM CDTRiver Flood WarningDVNClinton, Scott19 days
Oct 2, 11:01 AM CDTRiver Flood WarningDVNScott17 days
Oct 1, 7:56 PM CDTSpecial Weather StatementDVNJo Daviess49 min
Oct 1, 8:08 PM CDTSevere Thunderstorm WarningDVNJo Daviess30 min
Oct 1, 8:39 PM CDTSpecial Weather StatementDVNStephenson51 min
Oct 2, 4:14 PM CDTAreal Flood WarningDVNCarroll, Stephenson4 days

Nearby

Special Weather Statements in Illinois, 2019Every special weather statement in 2019

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.