Alert archive / Illinois / Special Weather Statements in 2017

Special Weather Statement, NWS Quad Cities, IA

June 26, 2017Warren County, Illinois

NWS Quad Cities, IA issued this special weather statement at Jun 26, 2017, 4:15 PM CDT for Warren County, Illinois. It was in force for 30 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 26, 2017, 4:15 PM CDT (21:15 UTC)
Expired: Jun 26, 2017, 4:45 PM CDT
In force: 30 min
Issued by: NWS Quad Cities, IA

County Warren County, IL

The radar

The Quad Cities radar (KDVN), 74 km from the middle of the area, began a volume at 21:15 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, 9.3 hours before the alert went out and 75 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1971 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 26, 3:26 PM CDT, 49 minutes earlier.

Area forecast discussion, Jun 26, 3:26 PM CDT, 49 minutes before

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Hazardous weather outlook, Jun 26, 3:36 PM CDT, 39 minutes before

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In the hours before

Special weather statement, Jun 26, 3:02 PM CDT, 1 hour 13 minutes before

Special Weather Statement
National Weather Service Quad Cities IA/IL
302 PM CDT MON JUN 26 2017

IAC183-262030-
Washington-
302 PM CDT MON JUN 26 2017

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL WASHINGTON COUNTY UNTIL
330 PM CDT...

At 302 PM CDT, a strong thunderstorm was located over Wellman, or 11
miles northwest of Washington, moving southeast at 35 mph.

Wind gusts up to 50 mph and dime size hail are possible with this
storm.

Locations impacted include...
Washington, Kalona, Wellman, Ainsworth, Richmond, West Chester,
Haskins, Washington Airport and Marr Park.

LAT...LON 4151 9185 4151 9173 4140 9148 4133 9149
      4122 9162 4141 9195
TIME...MOT...LOC 2002Z 305DEG 30KT 4144 9180

Gibbs

Special weather statement, Jun 26, 3:48 PM CDT, 27 minutes before

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Special weather statement, Jun 26, 4:15 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.

Issued	Product	Office	Counties	Lasted
Jun 26, 3:02 PM CDT	Special Weather Statement	DVN	Washington	28 min
Jun 26, 5:15 PM CDT	Special Weather Statement	DVN	Des Moines	60 min
Jun 26, 3:48 PM CDT	Special Weather Statement	DVN	Warren	27 min

Nearby

Special Weather Statements in Illinois, 2017 Every special weather statement in 2017

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.