Alert archive / Iowa / Tornado Warnings in 2008

Tornado Warning 68, NWS Des Moines, IA

June 7, 2008Hancock County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 7, 2008, 4:52 PM CDT for Hancock County, Iowa. It was in force for 23 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: Jun 7, 2008, 4:52 PM CDT (21:52 UTC)
Expired: Jun 7, 2008, 5:15 PM CDT
In force: 23 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

County Hancock County, IA

The radar

The Des Moines radar (KDMX), 161 km from the middle of the area, began a volume at 21:55 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
Jun 7, 12:17 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.9 hours before the alert went out and 186 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: 131 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 1341 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 318 m²/s²
0-3 km storm-relative helicity: 357 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 072152
TORDMX
IAC081-072215-
/O.NEW.KDMX.TO.W.0068.080607T2152Z-080607T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
452 PM CDT SAT JUN 7 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN HANCOCK COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 515 PM CDT.

* AT 451 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES SOUTH OF
  WODEN...OR 39 MILES WEST OF MASON CITY...MOVING EAST AT 48 MPH.

* THE TORNADO WILL BE NEAR...
  WODEN BY 455 PM CDT...
  BRITT BY 500 PM CDT...
  CRYSTAL LAKE BY 505 PM CDT...
  GARNER BY 515 PM CDT...

THIS IS A HAZARDOUS SITUATION. SEEK SHELTER IN A BASEMENT...OR IN AN
INTERIOR ROOM. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE OR IN A
CAR...SEEK SHELTER IN A REINFORCED BUILDING.

LAT...LON 4325 9351 4307 9350 4305 9398 4315 9399
      4325 9398 4325 9379
TIME...MOT...LOC 2152Z 261DEG 42KT 4313 9395

$$

COGIL

1 follow-up statement

000 
WWUS53 KDMX 072207
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
508 PM CDT SAT JUN 7 2008

IAC081-072215-
/O.CON.KDMX.TO.W.0068.000000T0000Z-080607T2215Z/
HANCOCK IA-
508 PM CDT SAT JUN 7 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTHERN
HANCOCK COUNTY...

AT 505 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR BRITT...OR 30
MILES WEST OF MASON CITY...MOVING EAST AT 43 MPH.

THE TORNADO WILL BE NEAR...
  6 MILES NORTHWEST OF GARNER BY 515 PM CDT...

SEEK SHELTER IN A BASEMENT...OR IN AN INTERIOR ROOM. STAY AWAY FROM
WINDOWS. IF YOU ARE IN A CAR OR OUTSIDE...SEEK SHELTER IN A
REINFORCED BUILDING.

LAT...LON 4325 9351 4307 9350 4305 9398 4315 9399
      4325 9398 4325 9379
TIME...MOT...LOC 2208Z 260DEG 37KT 4316 9376

$$

COGIL

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 10:31 PM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	12 days
Jun 7, 4:32 AM CDT	Flash Flood Watch	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	46 hr
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Humboldt	13 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Webster	10 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Dallas, Polk	9 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Polk, Story	7 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Cerro Gordo, Floyd, Worth	11 days
Jun 7, 3:26 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	49 min
Jun 7, 3:34 PM CDT	Tornado Warning	DMX	Winnebago, Worth	26 min
Jun 7, 3:58 PM CDT	Tornado Warning	DMX	Winnebago, Worth	32 min
Jun 7, 3:59 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	30 min
Jun 7, 4:03 PM CDT	Tornado Warning	DMX	Hancock, Kossuth, Winnebago	27 min
Jun 7, 4:25 PM CDT	Tornado Warning	DMX	Hancock, Winnebago, Worth	50 min
Jun 7, 4:29 PM CDT	Tornado Warning	DMX	Worth	19 min
Jun 7, 4:32 PM CDT	Flash Flood Warning	DMX	Winnebago, Worth	6 hr
Jun 7, 4:33 PM CDT	Tornado Warning	DMX	Kossuth	28 min
Jun 7, 5:02 PM CDT	Tornado Warning	DMX	Worth	28 min
Jun 7, 5:16 PM CDT	Tornado Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	44 min
Jun 7, 5:50 PM CDT	Tornado Warning	DMX	Cerro Gordo, Worth	25 min
Jun 7, 5:52 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	38 min
Jun 7, 6:00 PM CDT	Tornado Warning	DMX	Calhoun, Pocahontas	30 min
Jun 7, 6:11 PM CDT	Flash Flood Warning	DMX	Cerro Gordo, Hancock	12 hr
Jun 7, 6:17 PM CDT	Tornado Warning	DMX	Cerro Gordo	43 min
Jun 7, 6:32 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Webster	43 min
Jun 7, 6:42 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Wright	48 min
Jun 7, 6:46 PM CDT	Flash Flood Warning	DMX	Calhoun, Pocahontas, Sac	6 hr
Jun 7, 6:48 PM CDT	Tornado Warning	DMX	Calhoun, Pocahontas, Webster	27 min

Nearby

Tornado Warnings in Iowa, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.