Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 50, NWS Quad Cities, IA

July 21, 2017Muscatine County, Iowa; Rock Island County, Illinois

NWS Quad Cities, IA issued this tornado warning at Jul 21, 2017, 6:10 PM CDT for Muscatine County, Iowa; Rock Island County, Illinois. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 21, 2017, 6:10 PM CDT (23:10 UTC)
Expired: Jul 21, 2017, 7:00 PM CDT
In force: 50 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Muscatine County, IA, Rock Island County, IL

The radar

The Quad Cities radar (KDVN), 39 km from the middle of the area, began a volume at 23:14 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.

What was reported inside it

Time	Report	Where	Remark
Jul 21, 6:17 PM CDT	FUNNEL CLOUD	3 S Atalissa, IA	REPORTED VIA ATALISSA PD NEAR 155TH AND KELLY AVE.
Jul 21, 6:31 PM CDT	TSTM WND DMG	Muscatine, IA	A FEW 2 TO 4 INCH BRANCHES DOWN WITHIN THE CITY OF MUSCATINE. 2 5 TO 8 INCH TREE LIMBS DOWN FROM SOFT WOOD TREES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 21, 4:52 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.2 hours before the alert went out and 46 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: 81 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

295 
WFUS53 KDVN 212310
TORDVN
ILC161-IAC139-220000-
/O.NEW.KDVN.TO.W.0050.170721T2310Z-170722T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
610 PM CDT FRI JUL 21 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Southwestern Rock Island County in northwestern Illinois...
  Muscatine County in east central Iowa...

* Until 700 PM CDT

* At 610 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Nichols, or 12 miles northwest of Muscatine,
  moving east at 25 mph.

  HAZARD...Tornado. 

  SOURCE...Weather spotters reported funnel cloud. 

  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...
  Muscatine around 645 PM CDT. 
  Blue Grass, Fairport, Montpelier and Illinois City around 700 PM 
  CDT. 

Other locations impacted by this tornadic thunderstorm include
Wildcat Den State Park, Saulsbury Bridge Campground, Clark's Ferry
Recreation Area, Shady Creek Campground, Midway Beach, New Era, Loud
Thunder Forest Preserve, Ardon, Pleasant Prairie and Loud Thunder
Scout Camp.

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.

&&

LAT...LON 4156 9136 4157 9084 4151 9078 4145 9079
      4145 9073 4133 9089 4141 9137
TIME...MOT...LOC 2310Z 275DEG 22KT 4149 9129 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Gibbs

4 follow-up statements

550 
WWUS53 KDVN 212324
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
624 PM CDT FRI JUL 21 2017

ILC161-IAC139-220000-
/O.CON.KDVN.TO.W.0050.000000T0000Z-170722T0000Z/
Rock Island IL-Muscatine IA-
624 PM CDT FRI JUL 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN ROCK ISLAND AND CENTRAL MUSCATINE COUNTIES...
    
At 623 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Muscatine, moving east at 35 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...
  Fairport and Illinois City around 645 PM CDT. 
  Blue Grass and Montpelier around 650 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Wildcat Den State Park, Saulsbury Bridge Campground, Clark's Ferry
Recreation Area, Shady Creek Campground, Midway Beach, New Era, Loud
Thunder Forest Preserve, Ardon, Pleasant Prairie and Loud Thunder
Scout Camp.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4157 9084 4151 9078 4145 9079 4145 9073
      4133 9089 4139 9126 4156 9124
TIME...MOT...LOC 2323Z 275DEG 32KT 4148 9112 

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

$$

Gibbs

351 
WWUS53 KDVN 212328
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
628 PM CDT FRI JUL 21 2017

ILC161-IAC139-220000-
/O.CON.KDVN.TO.W.0050.000000T0000Z-170722T0000Z/
Rock Island IL-Muscatine IA-
628 PM CDT FRI JUL 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN ROCK ISLAND AND CENTRAL MUSCATINE COUNTIES...
        
At 628 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Muscatine, moving east at 35 mph.

HAZARD...Tornado and quarter size hail. 

SOURCE...Weather spotters reported a funnel cloud. 

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...
  Fairport and Illinois City around 645 PM CDT. 
  Montpelier around 650 PM CDT. 
  Blue Grass around 655 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Wildcat Den State Park, Saulsbury Bridge Campground, Clark's Ferry
Recreation Area, Shady Creek Campground, Midway Beach, New Era, Loud
Thunder Forest Preserve, Ardon, Pleasant Prairie and Loud Thunder
Scout Camp.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4157 9084 4151 9078 4145 9079 4145 9073
      4133 9089 4139 9126 4156 9124
TIME...MOT...LOC 2328Z 271DEG 32KT 4148 9107 

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

$$

Gibbs

490 
WWUS53 KDVN 212337
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
637 PM CDT FRI JUL 21 2017

ILC161-IAC139-220000-
/O.CON.KDVN.TO.W.0050.000000T0000Z-170722T0000Z/
Rock Island IL-Muscatine IA-
637 PM CDT FRI JUL 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN ROCK ISLAND AND CENTRAL MUSCATINE COUNTIES...
        
At 637 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fairport, or near Muscatine, moving east at 30 mph.

HAZARD...Tornado and quarter size hail. 

SOURCE...Weather spotters reported a funnel cloud. 

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...
  Fairport and Illinois City around 650 PM CDT. 
  Blue Grass and Montpelier around 700 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Wildcat Den State Park, Saulsbury Bridge Campground, Clark's Ferry
Recreation Area, Shady Creek Campground, Midway Beach, New Era, Loud
Thunder Forest Preserve, Ardon, Pleasant Prairie and Loud Thunder
Scout Camp.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4157 9084 4151 9078 4145 9079 4145 9073
      4133 9089 4139 9126 4150 9125 4152 9108
      4157 9103
TIME...MOT...LOC 2337Z 274DEG 26KT 4148 9099 

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

$$

Gibbs

646 
WWUS53 KDVN 212353 RRA
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
653 PM CDT FRI JUL 21 2017

IAC139-ILC161-220003-
/O.EXP.KDVN.TO.W.0050.000000T0000Z-170722T0000Z/
Rock Island IL-Muscatine IA-
653 PM CDT FRI JUL 21 2017

...THE TORNADO WARNING FOR SOUTHWESTERN ROCK ISLAND AND CENTRAL
MUSCATINE COUNTIES WILL EXPIRE AT 700 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until midnight CDT for
northwestern Illinois...and east central Iowa.

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

LAT...LON 4157 9084 4151 9078 4145 9079 4145 9073
      4133 9089 4139 9126 4150 9125 4152 9108
      4157 9103
TIME...MOT...LOC 2353Z 275DEG 22KT 4147 9086 

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 7:05 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry	40 min
Jul 20, 7:37 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson	53 min
Jul 20, 7:56 PM CDT	Flash Flood Warning	DVN	Henry, Jefferson	6 hr
Jul 20, 8:27 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson	46 min
Jul 20, 8:45 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine	31 min
Jul 20, 8:58 PM CDT	Flash Flood Warning	DVN	Henry, Jefferson, Louisa, Muscatine, Washington	6 hr
Jul 20, 9:44 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	46 min
Jul 20, 9:46 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Washington	30 min
Jul 20, 10:13 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	45 min
Jul 20, 10:39 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	35 min
Jul 20, 11:39 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Keokuk	27 min
Jul 21, 12:40 AM CDT	Special Weather Statement	DVN	Cedar, Johnson, Muscatine	65 min
Jul 21, 1:27 AM CDT	Special Weather Statement	DVN	Scott	63 min
Jul 21, 5:10 AM CDT	Special Weather Statement	DVN	Buchanan, Cedar, Jones, Linn	65 min
Jul 21, 2:56 PM CDT	River Flood Watch	DVN	Delaware, Jones	67 hr
Jul 21, 2:56 PM CDT	River Flood Watch	DVN	Jackson	4 days
Jul 21, 2:56 PM CDT	River Flood Watch	DVN	Buchanan, Linn	5 days
Jul 21, 3:51 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Washington	54 min
Jul 21, 4:39 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson	66 min
Jul 21, 4:49 PM CDT	Tornado Warning	DVN	Johnson	56 min
Jul 21, 5:01 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Jones, Linn	59 min
Jul 21, 5:16 PM CDT	Flash Flood Warning	DVN	Cedar, Johnson, Jones, Linn	6 hr
Jul 21, 5:24 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	37 min
Jul 21, 5:39 PM CDT	Tornado Warning	DVN	Cedar, Johnson, Muscatine	51 min
Jul 21, 6:50 PM CDT	Special Weather Statement	DVN	Clinton, Scott	55 min
Jul 21, 12:29 AM CDT	Special Weather Statement	DVN	Putnam	31 min
Jul 21, 2:25 AM CDT	Special Weather Statement	DVN	Bureau, Henry	65 min
Jul 21, 5:50 PM CDT	Special Weather Statement	DVN	Stephenson	40 min
Jul 21, 6:15 PM CDT	Severe Thunderstorm Warning	DVN	Stephenson	45 min
Jul 21, 6:56 PM CDT	Special Weather Statement	DVN	Henry, Mercer	64 min

Nearby

Tornado Warnings in Iowa, 2017 Tornado Warnings in Illinois, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.