Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 8, NWS Quad Cities, IA

April 27, 2014Cedar County, Jones County, Linn County, Iowa

NWS Quad Cities, IA issued this tornado warning at Apr 27, 2014, 4:43 PM CDT for Cedar County, Jones County, Linn County, Iowa. It was in force for 32 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
Apr 27, 2014, 4:43 PM CDT (21:43 UTC)
Expired
Apr 27, 2014, 5:15 PM CDT
In force
32 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Tornado
Observed
Hail
1.0 in

Counties Cedar County, IA, Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 76 km from the middle of the area, began a volume at 21:45 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
Apr 27, 2:13 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.7 hours before the alert went out and 81 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 12:00Z on 2014-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2014-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 467 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1230 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
467 m²/s²
0-3 km storm-relative helicity
555 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

855 
WFUS53 KDVN 272143
TORDVN
IAC031-105-113-272215-
/O.NEW.KDVN.TO.W.0008.140427T2143Z-140427T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
443 PM CDT SUN APR 27 2014

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN CEDAR COUNTY IN EAST CENTRAL IOWA...
  SOUTHWESTERN JONES COUNTY IN EAST CENTRAL IOWA...
  SOUTHEASTERN LINN COUNTY IN EAST CENTRAL IOWA...

* UNTIL 515 PM CDT

* AT 441 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR MOUNT VERNON  
  ...AND MOVING NORTHEAST AT 45 MPH.

  HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL.

  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS
           LIKELY.

* THE TORNADO WILL BE NEAR...
  MORLEY AND MARTELLE AROUND 450 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4206 9139 4203 9119 4185 9133 4189 9147
TIME...MOT...LOC 2143Z 212DEG 37KT 4196 9135

TORNADO...OBSERVED
HAIL...1.00IN

$$
1 follow-up statement
996 
WWUS53 KDVN 272153
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
453 PM CDT SUN APR 27 2014

IAC031-105-113-272203-
/O.CAN.KDVN.TO.W.0008.000000T0000Z-140427T2215Z/
LINN IA-CEDAR IA-JONES IA-
453 PM CDT SUN APR 27 2014

...THE TORNADO WARNING FOR SOUTHWESTERN JONES...NORTHWESTERN CEDAR
AND SOUTHEASTERN LINN COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

LAT...LON 4206 9139 4203 9119 4185 9133 4189 9147
TIME...MOT...LOC 2153Z 212DEG 37KT 4205 9127

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 2:47 PM CDTFlood WatchDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more27 hr
Apr 27, 3:13 PM CDTSpecial Weather StatementDVNJefferson, Van Buren47 min
Apr 27, 3:23 PM CDTSevere Thunderstorm WarningDVNIowa, Jefferson, Johnson, Keokuk, Van Buren, Washington67 min
Apr 27, 3:53 PM CDTTornado WarningDVNIowa, Keokuk, Washington37 min
Apr 27, 4:13 PM CDTSevere Thunderstorm WarningDVNCedar, Des Moines, Henry, Johnson, Linn, Louisa and 2 more47 min
Apr 27, 4:23 PM CDTTornado WarningDVNLinn22 min
Apr 27, 4:52 PM CDTSevere Thunderstorm WarningDVNCedar, Clinton, Jackson, Jones, Linn, Muscatine and 1 more38 min
Apr 27, 4:57 PM CDTSevere Thunderstorm WarningDVNDes Moines, Lee, Louisa63 min

Nearby

Tornado Warnings in Iowa, 2014Every tornado warning in 2014Tornadoes in 2014

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.