Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 13, NWS Quad Cities, IA

March 6, 2017Cedar County, Clinton County, Scott County, Iowa

NWS Quad Cities, IA issued this tornado warning at Mar 6, 2017, 10:17 PM CST for Cedar County, Clinton County, Scott County, Iowa. It was in force for 31 min. 3 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: Mar 6, 2017, 10:17 PM CST (04:17 UTC)
Expired: Mar 6, 2017, 10:48 PM CST
In force: 31 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cedar County, IA, Clinton County, IA, Scott County, IA

The radar

The Quad Cities radar (KDVN), 28 km from the middle of the area, began a volume at 04:19 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
Mar 6, 10:18 PM CST	TORNADO	1 Wnw Bennett, IA	1018 PM TO 1031 PM. EF1. EST PEAK WIND 110 MPH. PATH LENGTH 16.7 MILES. MAX WIDTH 100 YARDS. END LOCATION 41.84 N -90.7261 W OR 6.5 MILES NNE WHEATLAND IN CLINTON COUNTY. A TORNADO TOUCHED DOWN SOUTHWEST OF BENNETT AND TRACKED NORTHEAST ALONG A 16.7 MILE PATH
Mar 6, 10:30 PM CST	TSTM WND DMG	Dewitt, IA	TIME ESTIMATED, TREE UPROOTED ON 5TH AND 11TH CAUSING DAMAGE TO A HOUSE
Mar 6, 10:31 PM CST	TORNADO	Sw Dewitt, IA	NEAR HWY 30 IN DEWITT.

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
Mar 6, 8:52 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 4.3 hours before the alert went out and 33 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: 39 J/kg
Mixed-layer CIN: -343 J/kg
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 407 m²/s²
0-3 km storm-relative helicity: 489 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

960 
WFUS53 KDVN 070417
TORDVN
IAC031-045-163-070500-
/O.NEW.KDVN.TO.W.0013.170307T0417Z-170307T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
1017 PM CST MON MAR 6 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Southeastern Cedar County in east central Iowa...
  Northwestern Scott County in east central Iowa...
  Western Clinton County in east central Iowa...

* Until 1100 PM CST
    
* At 1017 PM CST, a severe thunderstorm capable of producing a
  tornado was located near Durant, moving northeast at 65 mph.

  HAZARD...Tornado. 

  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...
  Wheatland around 1025 PM CST. 
  Calamus around 1030 PM CST. 
  DeWitt and Grand Mound around 1035 PM CST. 
  Delmar and Welton around 1040 PM CST. 

Other locations impacted by this tornadic thunderstorm include Camp
Conestoga, Bennett Park, Sherman Park, Clinton County Fairgrounds,
Dixon, Big Rock, Sunbury, New Liberty and Lyons.

This includes Interstate 80 in Iowa between mile markers 270 and 275.
 
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 4160 9102 4173 9115 4203 9063 4190 9037
TIME...MOT...LOC 0417Z 225DEG 59KT 4167 9091 

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

$$

MCCLURE

4 follow-up statements

042 
WWUS53 KDVN 070425
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1025 PM CST MON MAR 6 2017

IAC031-045-163-070500-
/O.CON.KDVN.TO.W.0013.000000T0000Z-170307T0500Z/
Cedar IA-Scott IA-Clinton IA-
1025 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CST FOR EAST
CENTRAL CEDAR...NORTHWESTERN SCOTT AND WESTERN CLINTON COUNTIES...
    
At 1025 PM CST, a severe thunderstorm capable of producing a tornado
was located near Wheatland, or 13 miles east of Tipton, moving
northeast at 65 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...
  Calamus around 1030 PM CST. 
  Grand Mound around 1035 PM CST. 
  DeWitt and Welton around 1040 PM CST. 
  Delmar around 1045 PM CST. 

Other locations impacted by this tornadic thunderstorm include Camp
Conestoga, Bennett Park, Sherman Park, Clinton County Fairgrounds,
Dixon, Big Rock, New Liberty and Lyons.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4181 9102 4203 9063 4190 9037 4165 9091
TIME...MOT...LOC 0425Z 236DEG 56KT 4179 9088 

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

$$

MCCLURE

249 
WWUS53 KDVN 070434
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
1034 PM CST MON MAR 6 2017

IAC031-163-070444-
/O.CAN.KDVN.TO.W.0013.000000T0000Z-170307T0500Z/
Cedar IA-Scott IA-
1034 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR EAST CENTRAL CEDAR AND NORTHWESTERN SCOTT
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 400 AM CST for east central
Iowa.

LAT...LON 4189 9081 4203 9063 4190 9037 4175 9074
TIME...MOT...LOC 0434Z 225DEG 59KT 4190 9074 

$$

IAC045-070500-
/O.CON.KDVN.TO.W.0013.000000T0000Z-170307T0500Z/
Clinton IA-
1034 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CST FOR WESTERN
CLINTON COUNTY...
        
At 1034 PM CST, a confirmed tornado was located near Calamus, or 12
miles south of Maquoketa, moving northeast at 70 mph.

HAZARD...Damaging tornado and quarter size hail. 

SOURCE...Radar confirmed tornado. 

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 tornado will be near...
  Delmar around 1045 PM CST. 

Other locations impacted by this tornadic thunderstorm include Lyons.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4189 9081 4203 9063 4190 9037 4175 9074
TIME...MOT...LOC 0434Z 225DEG 59KT 4190 9074 

TORNADO...OBSERVED
HAIL...1.00IN

$$

Kotenberg

943 
WWUS53 KDVN 070436
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1036 PM CST MON MAR 6 2017

IAC045-070500-
/O.CON.KDVN.TO.W.0013.000000T0000Z-170307T0500Z/
Clinton IA-
1036 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CST FOR WESTERN
CLINTON COUNTY...
        
At 1036 PM CST, a confirmed tornado was located near Calamus, or 12
miles south of Maquoketa, moving northeast at 55 mph.

HAZARD...Damaging tornado and quarter size hail. 

SOURCE...Radar confirmed tornado. 

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 tornado will be near...
  DeWitt, Delmar and Welton around 1045 PM CST. 

Other locations impacted by this tornadic thunderstorm include Lyons.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4189 9081 4203 9063 4190 9037 4175 9074
TIME...MOT...LOC 0436Z 239DEG 46KT 4189 9071 

TORNADO...OBSERVED
HAIL...1.00IN

$$

MCCLURE

912 
WWUS53 KDVN 070448
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1048 PM CST MON MAR 6 2017

IAC045-070457-
/O.CAN.KDVN.TO.W.0013.000000T0000Z-170307T0500Z/
Clinton IA-
1048 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR WESTERN CLINTON COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore the warning has been cancelled.

A tornado watch remains in effect until 400 AM CST for east central
Iowa.

LAT...LON 4189 9081 4203 9063 4190 9037 4175 9074
TIME...MOT...LOC 0445Z 225DEG 59KT 4203 9053 

$$

MCCLURE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 6, 8:02 PM CST	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Iowa	58 min
Mar 6, 8:04 PM CST	Severe Thunderstorm Warning	DVN	Keokuk	56 min
Mar 6, 8:29 PM CST	Severe Thunderstorm Warning	DVN	Delaware, Johnson, Linn	61 min
Mar 6, 8:40 PM CST	Tornado Warning	DVN	Buchanan, Delaware	38 min
Mar 6, 8:46 PM CST	Severe Thunderstorm Warning	DVN	Keokuk, Washington	74 min
Mar 6, 8:46 PM CST	Tornado Warning	DVN	Benton, Iowa, Johnson, Linn	22 min
Mar 6, 8:54 PM CST	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	81 min
Mar 6, 9:05 PM CST	Severe Thunderstorm Warning	DVN	Cedar, Jones	55 min
Mar 6, 9:07 PM CST	Tornado Warning	DVN	Jones, Linn	26 min
Mar 6, 9:19 PM CST	Severe Thunderstorm Warning	DVN	Dubuque	56 min
Mar 6, 9:28 PM CST	Severe Thunderstorm Warning	DVN	Johnson	47 min
Mar 6, 9:31 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee, Louisa, Muscatine	74 min
Mar 6, 9:31 PM CST	Tornado Warning	DVN	Dubuque, Jackson, Jones	44 min
Mar 6, 9:42 PM CST	Severe Thunderstorm Warning	DVN	Jackson	63 min
Mar 6, 9:49 PM CST	Severe Thunderstorm Warning	DVN	Clinton	71 min
Mar 6, 9:52 PM CST	Severe Thunderstorm Warning	DVN	Clinton, Scott	83 min
Mar 6, 9:55 PM CST	Tornado Warning	DVN	Jackson	38 min
Mar 6, 10:04 PM CST	Severe Thunderstorm Warning	DVN	Cedar	44 min
Mar 6, 10:10 PM CST	Tornado Warning	DVN	Muscatine, Scott	24 min
Mar 6, 10:23 PM CST	Tornado Warning	DVN	Clinton, Scott	26 min
Mar 6, 10:26 PM CST	Severe Thunderstorm Warning	DVN	Clinton, Scott	49 min
Mar 6, 10:46 PM CST	Tornado Warning	DVN	Clinton, Jackson	20 min
Mar 7, 3:32 AM CST	Red Flag Warning	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	14 hr
Mar 7, 3:37 AM CST	Wind Advisory	DVN	Benton, Buchanan, Delaware, Dubuque, Jackson, Jones and 1 more	12 hr

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.