Alert archive / Iowa / Tornado Watches in 2005

Tornado Watch 439

June 8, 20054 states

The Storm Prediction Center issued this tornado watch at Jun 8, 2005, 5:30 PM CDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 8, 2005, 5:30 PM CDT (22:30 UTC)
Expired
Jun 8, 2005, 9:00 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 42 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Fremont County, IA, Guthrie County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clinton County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Cass County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE

The radar

The Omaha radar (KOAX), 108 km from the middle of the area, began a volume at 22:31 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.

Warnings issued inside it

2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 8, 7:56 PM CDTSevere Thunderstorm WarningEAXAtchison49 min
Jun 8, 8:57 PM CDTSevere Thunderstorm WarningTOPBrown, Nemaha32 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.5 hours before the alert went out and 108 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, Omaha, NE at 12:00Z on 2005-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 375 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 12:00Z on 2005-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -122 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
375 J/kg
Mixed-layer CIN
-267 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
-122 m²/s²
0-3 km storm-relative helicity
-111 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 082227
SEL9  
SPC WW 082227
IAZ000-KSZ000-MOZ000-NEZ000-090200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 439
NWS STORM PREDICTION CENTER NORMAN OK
530 PM CDT WED JUN 8 2005

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHWEST IOWA
       NORTHEAST KANSAS
       NORTHWEST MISSOURI
       SOUTHEAST NEBRASKA

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 530 PM UNTIL
900 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES
EITHER SIDE OF A LINE FROM 30 MILES SOUTHWEST OF SAINT JOSEPH
MISSOURI TO 30 MILES NORTH NORTHEAST OF OMAHA NEBRASKA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU9).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 437...WW 438...

DISCUSSION...SMALL CORRIDOR OF STRONG SURFACE-BASED INSTABILITY
/MLCAPE TO 2500 J PER KG/ AND MOIST...BACKED LOW LEVEL FLOW ON WRN
FRINGE MCS OUTFLOW DOME WILL BE CONDUCIVE TO SUPERCELLS WITH LARGE
HAIL AND POSSIBLY A COUPLE TORNADOES INTO EARLY TONIGHT OVER THE LWR
MO VLY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 25020.


...CORFIDI

392,0963 413,0970 414,0941 393,0940

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 7, 9:50 PM CDTTornado WatchSPCLyon, Sioux7 hr
Jun 7, 11:50 PM CDTSevere Thunderstorm WatchSPCAdams, Audubon, Cass, Cherokee, Crawford, Fremont and 11 more5 hr
Jun 8, 8:55 AM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Lucas, Ringgold and 1 more65 min
Jun 8, 9:47 AM CDTMesoscale DiscussionSPCAppanoose, Davis, Decatur, Des Moines, Henry, Jefferson and 11 more28 min
Jun 8, 9:55 AM CDTSevere Thunderstorm WatchSPCAppanoose, Clarke, Davis, Decatur, Henry, Jefferson and 5 more7 hr
Jun 8, 11:46 AM CDTMesoscale DiscussionSPCAppanoose, Davis, Des Moines, Henry, Jefferson, Lee and 4 more29 min
Jun 8, 12:00 PM CDTSevere Thunderstorm WatchSPCDes Moines, Henry, Lee5 hr
Jun 8, 1:03 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Butler and 27 more27 min
Jun 8, 1:30 PM CDTTornado WatchSPCAllen, Anderson, Bourbon, Butler, Chase, Coffey and 23 more8 hr
Jun 8, 4:00 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Coffey and 23 more60 min
Jun 8, 5:20 PM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Sedgwick, Sumner115 min
Jun 8, 1:52 PM CDTMesoscale DiscussionSPCFranklin, Lincoln, Pike, Saint Charles, Saint Louis, Warren and 1 more23 min
Jun 8, 2:10 PM CDTSevere Thunderstorm WatchSPCCrawford, Dent, Franklin, Gasconade, Jefferson, Lincoln and 8 more7 hr
Jun 8, 4:12 PM CDTMesoscale DiscussionSPCCrawford, Dent, Franklin, Gasconade, Jefferson, Lincoln and 6 more2 hr
Jun 8, 6:22 PM CDTMesoscale DiscussionSPCBollinger, Boone, Callaway, Cape Girardeau, Cole, Crawford and 24 more83 min

Nearby

Tornado Watches in Iowa, 2005Tornado Watches in Nebraska, 2005Tornado Watches in Missouri, 2005Every tornado watch in 2005

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.