Alert archive / Illinois / Tornado Warnings in 2017

Tornado Warning 45, NWS Quad Cities, IA

July 10, 2017Hancock County, Illinois; Lee County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 10, 2017, 7:41 PM CDT for Hancock County, Illinois; Lee County, Iowa. It was in force for 34 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 10, 2017, 7:41 PM CDT (00:41 UTC)
Expired: Jul 10, 2017, 8:15 PM CDT
In force: 34 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Lee County, IA, Hancock County, IL

The radar

The Quad Cities radar (KDVN), 137 km from the middle of the area, began a volume at 00:44 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, 0.7 hours before the alert went out and 141 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: 2871 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1254 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

316 
WFUS53 KDVN 110041
TORDVN
ILC067-IAC111-110115-
/O.NEW.KDVN.TO.W.0045.170711T0041Z-170711T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
741 PM CDT MON JUL 10 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northwestern Hancock County in west central Illinois...
  Central Lee County in southeastern Iowa...

* Until 815 PM CDT
    
* At 741 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Nauvoo, moving southeast at 30 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Ferris around 805 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Elvaston, Galland, Nauvoo State Park, Bluff Park and Camp Eastman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
the Quad Cities.

&&

LAT...LON 4057 9148 4063 9141 4048 9111 4038 9126
TIME...MOT...LOC 0041Z 308DEG 25KT 4055 9138 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:41 PM CDT	Special Weather Statement	DVN	Bureau, Putnam	64 min
Jul 10, 7:53 PM CDT	Special Weather Statement	DVN	McDonough	67 min
Jul 10, 8:10 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	50 min
Jul 10, 8:17 PM CDT	Special Weather Statement	DVN	Hancock	58 min
Jul 10, 8:17 PM CDT	Tornado Warning	DVN	McDonough	28 min
Jul 10, 8:19 PM CDT	Flash Flood Warning	DVN	McDonough, Warren	6 hr
Jul 10, 8:41 PM CDT	Flash Flood Warning	DVN	Hancock	6 hr
Jul 10, 9:03 PM CDT	Special Weather Statement	DVN	McDonough	57 min
Jul 10, 9:13 PM CDT	Special Weather Statement	DVN	Hancock	62 min
Jul 11, 6:26 AM CDT	Special Weather Statement	DVN	Hancock, Henderson, Mercer	49 min
Jul 11, 7:10 AM CDT	Special Weather Statement	DVN	Hancock, Henderson, McDonough, Mercer, Warren	50 min
Jul 11, 7:24 AM CDT	Special Weather Statement	DVN	Hancock	66 min
Jul 11, 8:15 AM CDT	Special Weather Statement	DVN	Putnam	45 min
Jul 11, 8:29 AM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	31 min
Jul 11, 11:25 AM CDT	Heat Advisory	DVN	Hancock, Henderson, McDonough, Mercer, Warren	9 hr
Jul 11, 5:27 AM CDT	Special Weather Statement	DVN	Iowa, Johnson, Keokuk, Washington	48 min
Jul 11, 5:40 AM CDT	Severe Thunderstorm Warning	DVN	Henry, Iowa, Jefferson, Johnson, Keokuk, Washington	50 min
Jul 11, 5:31 PM CDT	Special Weather Statement	DVN	Johnson	44 min
Jul 11, 5:51 PM CDT	Tornado Warning Tornado observed	DVN	Iowa, Johnson	39 min
Jul 11, 6:40 PM CDT	Special Weather Statement	DVN	Johnson	65 min

Nearby

Tornado Warnings in Illinois, 2017 Tornado Warnings in Iowa, 2017 Every tornado warning in 2017 Tornadoes 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.