Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 11, NWS Quad Cities, IA

March 6, 2017Jackson County, Iowa

NWS Quad Cities, IA issued this tornado warning at Mar 6, 2017, 9:55 PM CST for Jackson County, Iowa. It was in force for 38 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
Mar 6, 2017, 9:55 PM CST (03:55 UTC)
Expired
Mar 6, 2017, 10:33 PM CST
In force
38 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Jackson County, IA

The radar

The Quad Cities radar (KDVN), 69 km from the middle of the area, began a volume at 03:59 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 watch it was issued in

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

IssuedProductOfficeLasted
Mar 6, 8:52 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.9 hours before the alert went out and 67 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2017-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2017-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 407 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

351 
WFUS53 KDVN 070355
TORDVN
IAC097-070445-
/O.NEW.KDVN.TO.W.0011.170307T0355Z-170307T0445Z/

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

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Central Jackson County in east central Iowa...

* Until 1045 PM CST
    
* At 955 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Nashville, or 7 miles west of Maquoketa, moving
  northeast at 50 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...
  Hurstville around 1000 PM CST. 
  Fulton around 1005 PM CST. 
  Andrew around 1010 PM CST. 
  Springbrook around 1015 PM CST. 
  Bellevue around 1025 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Cottonville, Crab Town, Maquoketa Caves State Park, Ironhills and
Bellevue State 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.

&&

LAT...LON 4229 9042 4229 9043 4225 9042 4221 9037
      4220 9034 4218 9032 4206 9083 4219 9081
      4230 9043
TIME...MOT...LOC 0355Z 243DEG 42KT 4211 9081 

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

$$

MCCLURE
3 follow-up statements
587 
WWUS53 KDVN 070400
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1000 PM CST MON MAR 6 2017

IAC097-070445-
/O.CON.KDVN.TO.W.0011.000000T0000Z-170307T0445Z/
Jackson IA-
1000 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CST FOR CENTRAL
JACKSON COUNTY...
    
At 1000 PM CST, a severe thunderstorm capable of producing a tornado
was located over Fulton, or near Maquoketa, 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...
  Andrew around 1005 PM CST. 
  Springbrook around 1010 PM CST. 
  Bellevue around 1015 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Cottonville and Bellevue State 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.

&&

LAT...LON 4229 9042 4229 9043 4225 9042 4221 9037
      4220 9034 4218 9032 4208 9074 4221 9075
      4230 9043
TIME...MOT...LOC 0400Z 242DEG 52KT 4215 9068 

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

$$

MCCLURE
931 
WWUS53 KDVN 070419
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1019 PM CST MON MAR 6 2017

IAC097-070445-
/O.CON.KDVN.TO.W.0011.000000T0000Z-170307T0445Z/
Jackson IA-
1019 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CST FOR CENTRAL
JACKSON COUNTY...
    
At 1019 PM CST, a severe thunderstorm capable of producing a tornado
was located over Bellevue, or 12 miles south of Galena, moving
northeast at 45 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 tornadic thunderstorm will remain over mainly rural areas of
central Jackson County, including the following locations: Bellevue
State 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.

&&

LAT...LON 4229 9042 4229 9043 4225 9042 4221 9037
      4220 9034 4218 9032 4215 9050 4226 9056
      4230 9043
TIME...MOT...LOC 0419Z 243DEG 40KT 4224 9042 

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

$$

Gibbs
701 
WWUS53 KDVN 070433
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1033 PM CST MON MAR 6 2017

IAC097-070443-
/O.CAN.KDVN.TO.W.0011.000000T0000Z-170307T0445Z/
Jackson IA-
1033 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR CENTRAL JACKSON COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore the warning has been cancelled.

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

LAT...LON 4229 9042 4229 9043 4225 9042 4221 9037
      4220 9034 4218 9032 4215 9050 4226 9056
      4230 9043
TIME...MOT...LOC 0432Z 243DEG 42KT 4232 9021 

$$

MCCLURE

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 8:02 PM CSTSevere Thunderstorm WarningDVNBenton, Buchanan, Iowa58 min
Mar 6, 8:04 PM CSTSevere Thunderstorm WarningDVNKeokuk56 min
Mar 6, 8:29 PM CSTSevere Thunderstorm WarningDVNDelaware, Johnson, Linn61 min
Mar 6, 8:40 PM CSTTornado WarningDVNBuchanan, Delaware38 min
Mar 6, 8:46 PM CSTSevere Thunderstorm WarningDVNKeokuk, Washington74 min
Mar 6, 8:46 PM CSTTornado WarningDVNBenton, Iowa, Johnson, Linn22 min
Mar 6, 8:54 PM CSTSevere Thunderstorm WarningDVNJefferson, Van Buren81 min
Mar 6, 9:05 PM CSTSevere Thunderstorm WarningDVNCedar, Jones55 min
Mar 6, 9:07 PM CSTTornado WarningDVNJones, Linn26 min
Mar 6, 9:19 PM CSTSevere Thunderstorm WarningDVNDubuque56 min
Mar 6, 9:28 PM CSTSevere Thunderstorm WarningDVNJohnson47 min
Mar 6, 9:31 PM CSTSevere Thunderstorm WarningDVNDes Moines, Henry, Lee, Louisa, Muscatine74 min
Mar 6, 9:31 PM CSTTornado WarningDVNDubuque, Jackson, Jones44 min
Mar 6, 9:42 PM CSTSevere Thunderstorm WarningDVNJackson63 min
Mar 6, 9:49 PM CSTSevere Thunderstorm WarningDVNClinton71 min
Mar 6, 9:52 PM CSTSevere Thunderstorm WarningDVNClinton, Scott83 min
Mar 6, 10:04 PM CSTSevere Thunderstorm WarningDVNCedar44 min
Mar 6, 10:10 PM CSTTornado WarningDVNMuscatine, Scott24 min
Mar 6, 10:17 PM CSTTornado WarningDVNCedar, Clinton, Scott31 min
Mar 6, 10:23 PM CSTTornado WarningDVNClinton, Scott26 min
Mar 6, 10:26 PM CSTSevere Thunderstorm WarningDVNClinton, Scott49 min
Mar 6, 10:46 PM CSTTornado WarningDVNClinton, Jackson20 min
Mar 7, 3:32 AM CSTRed Flag WarningDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more14 hr
Mar 7, 3:37 AM CSTWind AdvisoryDVNBenton, Buchanan, Delaware, Dubuque, Jackson, Jones and 1 more12 hr

Nearby

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