Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 9, NWS Quad Cities, IA

March 6, 2017Jones County, Linn County, Iowa

NWS Quad Cities, IA issued this tornado warning at Mar 6, 2017, 9:07 PM CST for Jones County, Linn County, Iowa. It was in force for 26 min. 1 report 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, 9:07 PM CST (03:07 UTC)
Expired: Mar 6, 2017, 9:33 PM CST
In force: 26 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 78 km from the middle of the area, began a volume at 03:10 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, 9:10 PM CST	HAIL 1	Marion, IA

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, 1:54 PM CST	Tornado Watch	SPC	8 hr
Mar 6, 8:52 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.1 hours before the alert went out and 83 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.

458 
WFUS53 KDVN 070307
TORDVN
IAC105-113-070345-
/O.NEW.KDVN.TO.W.0009.170307T0307Z-170307T0345Z/

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

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Western Jones County in east central Iowa...
  Southeastern Linn County in east central Iowa...

* Until 945 PM CST
    
* At 907 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Bertram, or 7 miles east of Cedar Rapids, moving
  east 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...
  Mount Vernon around 910 PM CST. 
  Springville, Martelle, Viola and Whittier around 915 PM CST. 
  Anamosa, Morley and Stone City around 920 PM CST. 
  Langworthy around 925 PM CST. 

Other locations impacted by this tornadic thunderstorm include Marion
Airport, Matsell Bridge Natural Area, Central Park, Paralta,
Palisades-Kepler State Park, Wapsipinicon State Park and Squaw Creek
Park.

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 4204 9106 4188 9157 4204 9168 4226 9121
TIME...MOT...LOC 0307Z 249DEG 57KT 4198 9153 

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

$$

MCCLURE

5 follow-up statements

503 
WWUS53 KDVN 070312
SVSDVN

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

IAC105-113-070345-
/O.CON.KDVN.TO.W.0009.000000T0000Z-170307T0345Z/
Jones IA-Linn IA-
912 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CST FOR WESTERN
JONES AND SOUTHEASTERN LINN COUNTIES...
    
At 912 PM CST, a severe thunderstorm capable of producing a tornado
was located near Springville, or 9 miles northeast of Cedar Rapids,
moving northeast at 60 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...
  Stone City around 920 PM CST. 
  Anamosa and Morley around 925 PM CST. 
  Langworthy around 930 PM CST. 
  Monticello around 935 PM CST. 

Other locations impacted by this tornadic thunderstorm include Marion
Airport, Wapsipinicon State Park, Matsell Bridge Natural Area,
Central Park and Paralta.

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 4190 9149 4209 9158 4226 9121 4204 9106
TIME...MOT...LOC 0312Z 242DEG 52KT 4204 9150 

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

$$

MCCLURE

775 
WWUS53 KDVN 070317
SVSDVN

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

IAC105-113-070345-
/O.CON.KDVN.TO.W.0009.000000T0000Z-170307T0345Z/
Jones IA-Linn IA-
917 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CST FOR WESTERN
JONES AND EAST CENTRAL LINN COUNTIES...
    
At 917 PM CST, a severe thunderstorm capable of producing a tornado
was located over Viola, or near Anamosa, moving east 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...
  Morley and Stone City around 920 PM CST. 
  Anamosa around 925 PM CST. 
  Langworthy around 930 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Wapsipinicon State Park, Matsell Bridge Natural Area and Central
Park.

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 4197 9141 4213 9149 4226 9121 4204 9106
TIME...MOT...LOC 0317Z 249DEG 57KT 4207 9139 

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

$$

MCCLURE

178 
WWUS53 KDVN 070322
SVSDVN

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

IAC113-070332-
/O.CAN.KDVN.TO.W.0009.000000T0000Z-170307T0345Z/
Linn IA-
922 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR EAST CENTRAL LINN 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 1000 PM CST for east central
Iowa. A tornado watch also remains in effect until 400 AM CST for
east central Iowa.

LAT...LON 4204 9106 4198 9135 4210 9137 4211 9136
      4219 9136 4226 9121
TIME...MOT...LOC 0322Z 249DEG 57KT 4210 9128 

$$

IAC105-070345-
/O.CON.KDVN.TO.W.0009.000000T0000Z-170307T0345Z/
Jones IA-
922 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CST FOR WESTERN
JONES COUNTY...
    
At 922 PM CST, a severe thunderstorm capable of producing a tornado
was located over Anamosa, moving east 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...
  Langworthy around 925 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Wapsipinicon State Park and Central Park.

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 4204 9106 4198 9135 4210 9137 4211 9136
      4219 9136 4226 9121
TIME...MOT...LOC 0322Z 249DEG 57KT 4210 9128 

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

$$

MCCLURE

300 
WWUS53 KDVN 070328
SVSDVN

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

IAC105-070345-
/O.CON.KDVN.TO.W.0009.000000T0000Z-170307T0345Z/
Jones IA-
928 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CST FOR
NORTHWESTERN JONES COUNTY...
    
At 928 PM CST, a severe thunderstorm capable of producing a tornado
was located over Langworthy, or 7 miles northeast of Anamosa, 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 tornadic thunderstorm will remain over mainly rural areas of
northwestern Jones County.

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 4217 9115 4213 9128 4211 9136 4219 9136
      4226 9121
TIME...MOT...LOC 0328Z 238DEG 56KT 4221 9121 

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

$$

MCCLURE

456 
WWUS53 KDVN 070333
SVSDVN

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

IAC105-070343-
/O.CAN.KDVN.TO.W.0009.000000T0000Z-170307T0345Z/
Jones IA-
933 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR NORTHWESTERN JONES 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 4217 9115 4213 9128 4211 9136 4219 9136
      4226 9121
TIME...MOT...LOC 0332Z 249DEG 57KT 4224 9110 

$$

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, 9:19 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, 10:17 PM CST	Tornado Warning	DVN	Cedar, Clinton, Scott	31 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.