Alert archive / Iowa / Tornado Warnings in 2016

Tornado Warning 24, NWS Quad Cities, IA

July 23, 2016Delaware County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 23, 2016, 4:26 PM CDT for Delaware County, Iowa. It was in force for 20 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: Jul 23, 2016, 4:26 PM CDT (21:26 UTC)
Expired: Jul 23, 2016, 4:46 PM CDT
In force: 20 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Delaware County, IA

The radar

The Quad Cities radar (KDVN), 104 km from the middle of the area, began a volume at 21:29 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.

Issued	Product	Office	Lasted
Jul 23, 3:23 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.4 hours before the alert went out and 107 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: 2607 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

915 
WFUS53 KDVN 232126
TORDVN
IAC055-232215-
/O.NEW.KDVN.TO.W.0024.160723T2126Z-160723T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
426 PM CDT SAT JUL 23 2016

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN DELAWARE COUNTY IN NORTHEASTERN IOWA...

* UNTIL 515 PM CDT
    
* AT 426 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER DELHI...OR 8 MILES SOUTHEAST OF
  MANCHESTER...MOVING EAST AT 35 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...
  EARLVILLE AROUND 430 PM CDT. 
  HOPKINTON AROUND 435 PM CDT. 
  DYERSVILLE AROUND 445 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE TURTLE
CREEK PARK AND BAILEYS FORD 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.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW!

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
THE QUAD CITIES.

&&

LAT...LON 4230 9113 4236 9141 4251 9141 4255 9114
TIME...MOT...LOC 2126Z 271DEG 29KT 4242 9132 

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

$$

GIBBS

1 follow-up statement

160 
WWUS53 KDVN 232146
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
446 PM CDT SAT JUL 23 2016

IAC055-232156-
/O.CAN.KDVN.TO.W.0024.000000T0000Z-160723T2215Z/
DELAWARE IA-
446 PM CDT SAT JUL 23 2016

...THE TORNADO WARNING FOR SOUTHEASTERN DELAWARE COUNTY IS
CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER HEAVY RAIN IS
STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NORTHEASTERN IOWA.

LAT...LON 4230 9113 4236 9141 4251 9141 4255 9114
TIME...MOT...LOC 2140Z 271DEG 29KT 4242 9110 

$$

GIBBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 2:30 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	45 min
Jul 23, 3:13 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	62 min
Jul 23, 3:18 PM CDT	Tornado Warning	DVN	Buchanan	57 min
Jul 23, 3:52 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Dubuque, Jones, Linn	53 min
Jul 23, 4:00 PM CDT	Tornado Warning	DVN	Delaware	45 min
Jul 23, 4:04 PM CDT	Flash Flood Warning	DVN	Buchanan	6 hr
Jul 23, 4:22 PM CDT	Flash Flood Warning	DVN	Delaware	6 hr
Jul 23, 4:35 PM CDT	Tornado Warning	DVN	Dubuque, Jackson	55 min
Jul 23, 4:38 PM CDT	Severe Thunderstorm Warning	DVN	Jackson, Jones	67 min
Jul 23, 4:40 PM CDT	Flash Flood Warning	DVN	Dubuque, Jackson, Jones	6 hr
Jul 23, 4:59 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson	61 min
Jul 23, 5:12 PM CDT	Tornado Warning	DVN	Jackson, Jones	63 min
Jul 23, 6:08 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Jackson, Jones	67 min
Jul 23, 6:46 PM CDT	Special Weather Statement	DVN	Clinton	59 min

Nearby

Tornado Warnings in Iowa, 2016 Every tornado warning in 2016 Tornadoes in 2016

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.