Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 10, NWS Quad Cities, IA

March 6, 2017Dubuque County, Jackson County, Jones County, Iowa

NWS Quad Cities, IA issued this tornado warning at Mar 6, 2017, 9:31 PM CST for Dubuque County, Jackson County, Jones County, Iowa. It was in force for 44 min. 4 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, 9:31 PM CST (03:31 UTC)
Expired: Mar 6, 2017, 10:15 PM CST
In force: 44 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Dubuque County, IA, Jackson County, IA, Jones County, IA

The radar

The Quad Cities radar (KDVN), 82 km from the middle of the area, began a volume at 03:34 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, 9:35 PM CST	TSTM WND GST 63	Monticello, IA
Mar 6, 9:36 PM CST	TSTM WND GST 65	W Cascade, IA
Mar 6, 9:47 PM CST	TORNADO	1 S Bernard, IA	947 PM TO 955 PM CST. EF0. PEAK WINDS 85 MPH. PATH LENGTH 5.7 MILES. MAX WIDTH 25 YARDS. END POINT 5.1 MILES ENE OF BERNARD IN DUBUQUE COUNTY. NUMEROUS TREES SUFFERED DAMAGE ALONG WITH A FEW DESTROYED OUT BUILDINGS. ROOFS WERE TORN OFF A HOG CONFINEMENT FARM A
Mar 6, 9:59 PM CST	TSTM WND GST 56	Dubuque Regional Airpor, 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, 8:52 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.5 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.

120 
WFUS53 KDVN 070331
TORDVN
IAC061-097-105-070415-
/O.NEW.KDVN.TO.W.0010.170307T0331Z-170307T0415Z/

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

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northwestern Jackson County in east central Iowa...
  Southern Dubuque County in northeastern Iowa...
  Northeastern Jones County in east central Iowa...

* Until 1015 PM CST
    
* At 930 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Monticello, or 11 miles northeast of Anamosa,
  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...
  Cascade around 940 PM CST. 
  Bernard around 945 PM CST. 
  La Motte and Zwingle around 955 PM CST. 
  St. Donatus around 1000 PM CST. 

Other locations impacted by this tornadic thunderstorm include Swiss
Valley Park, Key West, Smiths, Jones County Fairgrounds, Dubuque
Regional Airport, Garry Owen, Fillmore, Pictured Rocks Wildlife Area,
Rockdale and Mines of Spain.

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 4233 9042 4232 9042 4215 9118 4228 9126
      4230 9122 4230 9113 4233 9113 4250 9073
TIME...MOT...LOC 0330Z 249DEG 56KT 4224 9115 

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

$$

MCCLURE

4 follow-up statements

988 
WWUS53 KDVN 070339 RRA
SVSDVN

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

IAC061-097-105-070415-
/O.CON.KDVN.TO.W.0010.000000T0000Z-170307T0415Z/
Jackson IA-Dubuque IA-Jones IA-
939 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
NORTHWESTERN JACKSON...SOUTHERN DUBUQUE AND NORTHEASTERN JONES
COUNTIES...
    
At 939 PM CST, a severe thunderstorm capable of producing a tornado
was located over Cascade, or 20 miles northeast of Anamosa, moving
northeast at 65 mph. A second area of rotation was being detected
southwest of Temple Hill moving northeast. 

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...
  Bernard around 945 PM CST. 
  Peosta around 950 PM CST. 
  Dubuque around 955 PM CST. 

Other locations impacted by this tornadic thunderstorm include Swiss
Valley Park, Key West, Smiths, Jones County Fairgrounds, Dubuque
Regional Airport, Garry Owen, Fillmore, Pictured Rocks Wildlife Area,
Rockdale and Mines of Spain.

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 4233 9042 4232 9042 4215 9118 4228 9126
      4230 9122 4230 9113 4233 9113 4250 9073
TIME...MOT...LOC 0339Z 242DEG 57KT 4232 9101 

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

$$

MCCLURE

295 
WWUS53 KDVN 070347
SVSDVN

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

IAC061-097-105-070415-
/O.CON.KDVN.TO.W.0010.000000T0000Z-170307T0415Z/
Jackson IA-Dubuque IA-Jones IA-
947 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
NORTHWESTERN JACKSON...SOUTHERN DUBUQUE AND NORTHEASTERN JONES
COUNTIES...
    
At 946 PM CST, a severe thunderstorm capable of producing a tornado
was located near Canton, or 17 miles northwest of Maquoketa, moving
northeast at 50 mph. A second area of rotation was located near the 
Fillmore Recreational Area moving northeast. 

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...
  Bernard around 955 PM CST. 
  Zwingle around 1000 PM CST. 
  La Motte around 1005 PM CST. 
  St. Donatus around 1010 PM CST. 

Other locations impacted by this tornadic thunderstorm include Swiss
Valley Park, Key West, Smiths, Dubuque Regional Airport, Garry Owen,
Fillmore, Rockdale, Mines of Spain, Fillmore Recreation Area and
Center Grove.

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 4233 9042 4232 9042 4220 9096 4228 9102
      4236 9106 4250 9073
TIME...MOT...LOC 0346Z 252DEG 42KT 4223 9092 

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

$$

MCCLURE

880 
WWUS53 KDVN 070353
SVSDVN

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

IAC105-070403-
/O.CAN.KDVN.TO.W.0010.000000T0000Z-170307T0415Z/
Jones IA-
953 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR NORTHEASTERN 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 northwestern
Illinois...and northeastern and east central Iowa.

LAT...LON 4233 9042 4232 9042 4223 9081 4237 9091
      4250 9073
TIME...MOT...LOC 0353Z 242DEG 59KT 4232 9077 

$$

IAC061-097-070415-
/O.CON.KDVN.TO.W.0010.000000T0000Z-170307T0415Z/
Jackson IA-Dubuque IA-
953 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
NORTHWESTERN JACKSON AND SOUTHEASTERN DUBUQUE COUNTIES...
    
At 953 PM CST, a severe thunderstorm capable of producing a tornado
was located near Bernard, or 13 miles south of Dubuque, 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...
  St. Donatus around 1005 PM CST. 

Other locations impacted by this tornadic thunderstorm include Swiss
Valley Park, Key West, Smiths, Dubuque Regional Airport, Center
Grove, Garry Owen, Washington Mills, Rockdale, Mines of Spain and
South Gary Owen.

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 4233 9042 4232 9042 4223 9081 4237 9091
      4250 9073
TIME...MOT...LOC 0353Z 242DEG 59KT 4232 9077 

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

$$

MCCLURE

084 
WWUS53 KDVN 070358
SVSDVN

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

IAC061-097-070415-
/O.CON.KDVN.TO.W.0010.000000T0000Z-170307T0415Z/
Jackson IA-Dubuque IA-
958 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
NORTHWESTERN JACKSON AND SOUTHEASTERN DUBUQUE COUNTIES...
    
At 958 PM CST, a severe thunderstorm capable of producing a tornado
was located near Zwingle, or 10 miles south of Dubuque, moving
northeast at 60 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...
  St. Donatus around 1005 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Dubuque Regional Airport and Smiths.

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 4233 9042 4232 9042 4226 9070 4235 9082
      4245 9064
TIME...MOT...LOC 0358Z 246DEG 52KT 4235 9071 

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

$$

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, 9:42 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.