Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 6, NWS Quad Cities, IA

April 27, 2014Iowa County, Keokuk County, Washington County, Iowa

NWS Quad Cities, IA issued this tornado warning at Apr 27, 2014, 3:53 PM CDT for Iowa County, Keokuk County, Washington County, Iowa. It was in force for 37 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
Apr 27, 2014, 3:53 PM CDT (20:53 UTC)
Expired
Apr 27, 2014, 4:30 PM CDT
In force
37 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Iowa County, IA, Keokuk County, IA, Washington County, IA

The radar

The Quad Cities radar (KDVN), 97 km from the middle of the area, began a volume at 20:53 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

TimeReportWhereRemark
Apr 27, 3:55 PM CDTTSTM WND DMGWnw Parnell, IASMALL BRANCHES DOWN. GUTTER BLOWN OFF HOUSE. 0.70 INCH OF RAIN IN 15 MINUTES.

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.

IssuedProductOfficeLasted
Apr 27, 2:13 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.9 hours before the alert went out and 104 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.

403 
WFUS53 KDVN 272053
TORDVN
IAC095-107-183-272130-
/O.NEW.KDVN.TO.W.0006.140427T2053Z-140427T2130Z/

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

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN IOWA COUNTY IN EAST CENTRAL IOWA...
  NORTHEASTERN KEOKUK COUNTY IN SOUTHEAST IOWA...
  WASHINGTON COUNTY IN SOUTHEAST IOWA...

* UNTIL 430 PM CDT

* AT 350 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR KINROSS...AND MOVING NORTHEAST AT 55 MPH.

  HAZARD...TORNADO AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  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.

* LOCATIONS IMPACTED INCLUDE...
  PARNELL...RICHMOND...KALONA...WILLIAMSBURG...RIVERSIDE AND
  HOLBROOK.

OTHER LOCATIONS AFFECTED INCLUDE WASHINGTON COUNTY FAIRGROUNDS...
BRINTON TIMBER PARK AND MARR PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4169 9201 4161 9183 4151 9188 4151 9153
      4149 9150 4147 9152 4146 9150 4145 9151
      4142 9148 4116 9149 4117 9194 4143 9195
      4148 9207
TIME...MOT...LOC 2054Z 212DEG 49KT 4151 9195

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

$$
2 follow-up statements
846 
WWUS53 KDVN 272056
SVSDVN

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

IAC183-272106-
/O.CAN.KDVN.TO.W.0006.000000T0000Z-140427T2130Z/
WASHINGTON IA-
356 PM CDT SUN APR 27 2014

...THE TORNADO WARNING FOR WASHINGTON COUNTY IS CANCELLED...

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

LAT...LON 4153 9205 4169 9201 4161 9183 4151 9188
      4151 9194 4144 9194 4143 9195 4148 9207
TIME...MOT...LOC 2056Z 212DEG 49KT 4153 9193

$$

IAC095-107-272130-
/O.CON.KDVN.TO.W.0006.000000T0000Z-140427T2130Z/
KEOKUK IA-IOWA IA-
356 PM CDT SUN APR 27 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN IOWA AND
NORTHEASTERN KEOKUK COUNTIES UNTIL 430 PM CDT...

AT 353 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR KINROSS...AND MOVING NORTHEAST AT 55 MPH.

HAZARD...TORNADO AND QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

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.

LOCATIONS IMPACTED INCLUDE...
WILLIAMSBURG AND HOLBROOK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4153 9205 4169 9201 4161 9183 4151 9188
      4151 9194 4144 9194 4143 9195 4148 9207
TIME...MOT...LOC 2056Z 212DEG 49KT 4153 9193

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

$$
265 
WWUS53 KDVN 272114
SVSDVN

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

IAC095-107-272124-
/O.CAN.KDVN.TO.W.0006.000000T0000Z-140427T2130Z/
KEOKUK IA-IOWA IA-
414 PM CDT SUN APR 27 2014

...THE TORNADO WARNING FOR SOUTHEASTERN IOWA AND NORTHEASTERN KEOKUK
COUNTIES IS CANCELLED...

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

LAT...LON 4153 9205 4169 9201 4161 9183 4151 9188
      4151 9194 4144 9194 4143 9195 4148 9207
TIME...MOT...LOC 2114Z 212DEG 49KT 4174 9175

$$

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, 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, 4:43 PM CDTTornado Warning Tornado observedDVNCedar, Jones, Linn32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.