Alert archive / Iowa / Tornado Warnings in 2007

Tornado Warning 21, NWS Quad Cities, IA

July 16, 2007Washington County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 16, 2007, 5:36 PM CDT for Washington County, Iowa. It was in force for 39 min. 11 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
Jul 16, 2007, 5:36 PM CDT (22:36 UTC)
Expired
Jul 16, 2007, 6:15 PM CDT
In force
39 min
Issued by
NWS Quad Cities, IA
Area
Counties, with a storm outline in the text

County Washington County, IA

The radar

The Quad Cities radar (KDVN), 92 km from the middle of the area, began a volume at 22:37 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
Jul 16, 5:47 PM CDTTSTM WND GST 40Washington, IA
Jul 16, 5:49 PM CDTHAIL 0.88Washington, IA
Jul 16, 5:49 PM CDTTORNADO7 W Haskins, IAREPORTED TO LAW ENFORCEMENT
Jul 16, 5:50 PM CDTHAIL 1.75Washington, IA
Jul 16, 5:53 PM CDTTSTM WND GST 61Washington, IA
Jul 16, 5:56 PM CDTTSTM WND DMG6 Nne Washington, IATREE DAMAGED
Jul 16, 5:56 PM CDTHAIL 0.886 Nne Washington, IATIME UNKNOWN
Jul 16, 6:00 PM CDTTSTM WND DMG3 E Washington, IADAMAGE TIME ESTIMATED - CORNFIELDS FLATTENED SPOTTER-REPORT WAS RECEIVED AT 755 PM
Jul 16, 6:00 PM CDTTSTM WND DMGWashington, IAPOSSIBLE TORNADO - AUTO DEALERSHIP DAMAGED, TREES DOWN,POWER OUT IN NUMEROUS AREAS ACROSS COUNTY, WINDMILL DOWN.
Jul 16, 6:00 PM CDTTSTM WND DMGWashington, IATIME ESTIMATED/ ACROSS THE CITY NUMEROUS MATURE TREES ARE SNAPPED OFF AT THEIR BASES /REPORT RECEIVED AT 755 PM
Jul 16, 6:09 PM CDTTSTM WND DMGWashington, IAPOWER IS OUT IN TOWN AND DITCHES ARE FULL OF RAINWATER

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
Jul 16, 3:38 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.6 hours before the alert went out and 99 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 2007-07-16Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2007-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
1487 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
127 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.

000 
WFUS53 KDVN 162237
TORDVN
IAC183-162315-
/O.NEW.KDVN.TO.W.0021.070716T2236Z-070716T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
536 PM CDT MON JUL 16 2007

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  WASHINGTON COUNTY IN SOUTHEAST IOWA...

* UNTIL 615 PM CDT.

* AT 533 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR RICHMOND...OR ABOUT 7 MILES NORTH OF WASHINGTON...
  MOVING SOUTH AT 10 MPH.

* THE TORNADO WILL BE NEAR...
  WASHINGTON AROUND 600 PM CDT...
  AINSWORTH AROUND 610 PM CDT...
  CRAWFORDSVILLE AROUND 615 PM CDT...

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT MONDAY EVENING
FOR EASTERN IOWA.

LAT...LON 4147 9162 4144 9174 4132 9177 4118 9171
      4118 9151 4141 9148

$$

SHEETS
3 follow-up statements
000 
WWUS53 KDVN 162248
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
547 PM CDT MON JUL 16 2007

IAC183-162315-
/O.CON.KDVN.TO.W.0021.000000T0000Z-070716T2315Z/
WASHINGTON IA-
547 PM CDT MON JUL 16 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
WASHINGTON COUNTY...

AT 545 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR WASHINGTON... 
MOVING SOUTH AT 15 MPH.

THE TORNADO WILL BE NEAR...
  WASHINGTON AND 7 MILES WEST OF HASKINS AROUND 555 PM CDT...
  WASHINGTON AIRPORT AROUND 600 PM CDT...
  AINSWORTH AROUND 605 PM CDT...
  CRAWFORDSVILLE AROUND 615 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT MONDAY EVENING
FOR EASTERN IOWA.

LAT...LON 4147 9162 4145 9179 4132 9177 4118 9171
      4118 9151 4141 9148

$$

SHEETS
000 
WWUS53 KDVN 162254
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
552 PM CDT MON JUL 16 2007

IAC183-162315-
/O.CON.KDVN.TO.W.0021.000000T0000Z-070716T2315Z/
WASHINGTON IA-
552 PM CDT MON JUL 16 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
WASHINGTON COUNTY...

AT 549 PM CDT...WASHINGTON COUNTY SHERIFF REPORTED A TORNADO 7 WEST 
OF HASKINS. THIS TORNADO WAS LOCATED NEAR THE EAST SIDE OF 
WASHINGTON...MOVING SOUTH AT 15 MPH.

THE TORNADO WILL BE NEAR...
  AINSWORTH AROUND 600 PM CDT...
  CRAWFORDSVILLE AROUND 610 PM CDT...

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT MONDAY EVENING
FOR EASTERN IOWA.

LAT...LON 4147 9162 4145 9179 4132 9177 4118 9171
      4118 9151 4141 9148

$$

SHEETS
000 
WWUS53 KDVN 162316
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
616 PM CDT MON JUL 16 2007

IAC183-162326-
/O.EXP.KDVN.TO.W.0021.000000T0000Z-070716T2315Z/
WASHINGTON IA-
616 PM CDT MON JUL 16 2007

...THE TORNADO WARNING FOR WASHINGTON COUNTY EXPIRES AT 615 PM CDT...

THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS
MOVED OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN
ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT MONDAY EVENING
FOR EASTERN IOWA.

LAT...LON 4147 9162 4145 9179 4132 9177 4118 9171
      4118 9151 4141 9148

$$

SHEETS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 3:27 PM CDTSevere Thunderstorm WarningDVNLinn48 min
Jul 16, 3:39 PM CDTSevere Thunderstorm WarningDVNJohnson51 min
Jul 16, 4:18 PM CDTTornado WarningDVNJohnson42 min
Jul 16, 4:44 PM CDTFlash Flood WarningDVNJohnson6 hr
Jul 16, 4:49 PM CDTSevere Thunderstorm WarningDVNWashington56 min
Jul 16, 5:08 PM CDTSevere Thunderstorm WarningDVNJohnson40 min
Jul 16, 5:40 PM CDTFlash Flood WarningDVNWashington6 hr
Jul 16, 6:04 PM CDTSevere Thunderstorm WarningDVNHenry56 min
Jul 16, 6:13 PM CDTSevere Thunderstorm WarningDVNJefferson, Keokuk62 min
Jul 16, 6:26 PM CDTTornado WarningDVNJefferson49 min
Jul 16, 6:51 PM CDTSevere Thunderstorm WarningDVNBenton, Linn54 min
Jul 16, 6:58 PM CDTFlash Flood WatchDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more59 hr

Nearby

Tornado Warnings in Iowa, 2007Every tornado warning in 2007Tornadoes in 2007

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.