Severe weather outbreak - October 4

[EF-5bigj]

I'm amazed how quickly this escalated and how quick the storms produced violent tornadoes.

[CrazyC83]

Probs are 40/30.

SEL1

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 541
NWS STORM PREDICTION CENTER NORMAN OK
645 PM CDT FRI OCT 4 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF
WESTERN AND CENTRAL IOWA

* EFFECTIVE THIS FRIDAY NIGHT FROM 645 PM UNTIL MIDNIGHT CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL TORNADOES WITH A FEW INTENSE TORNADOES POSSIBLE
SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2
INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES SOUTH SOUTHWEST OF
DES MOINES IOWA TO 40 MILES WEST NORTHWEST OF MASON CITY IOWA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 539...WW 540...

DISCUSSION...DISCRETE SUPERCELLS OVER FAR SWRN AND NWRN PARTS OF IA
ARE EXPECTED TO SPREAD NEWD THIS EVENING...WITH POTENTIAL FOR NEW
STORMS TO DEVELOP ALONG/AHEAD OF AN EWD ADVANCING COLD FRONT
APPROACHING THE MO RIVER. FAVORABLE INSTABILITY WITH CAPE RANGING
FROM 2500 J/KG IN SRN IA TO NEAR 1000 J/KG IN NRN IA COUPLED WITH
WINDS THAT VEER STRONGLY WITH HEIGHT /REF DMX VAD WIND PROFILE/ WILL
PROMOTE CONTINUATION OF A SUPERCELL/TORNADO THREAT SPREADING TOWARD
CENTRAL IA TONIGHT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 23030.


...WEISS

[CrazyC83]

Looks like we have a third cell producing tornadoes, right behind the northern supercell.

[EF-5bigj]

More tornado warnings.

[WeatherGuesser]

Doesn't look like either system went anywhere near Sioux City. I'd be more concerned about Salix and Waterbury.

[EF-5bigj]

Well it's good neither hit the city but it's still not good news for city's and towns in that area.

[CrazyC83]

VIOLENT tornado approaching Washta, Iowa right now...reported to be well over a mile wide, some say capable of EF-5 damage...

[EF-5bigj]

That supercell has a crazy hook to it.

[CrazyC83]

There could be new cells developing to the south too.

Hearing Jefferson, SD was "levelled" by the tornado...

[EF-5bigj]

leveled...

[RL3AO]

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
740 PM CDT FRI OCT 4 2013

IAC035-050100-
/O.CON.KFSD.TO.W.0020.000000T0000Z-131005T0100Z/
CHEROKEE IA-
740 PM CDT FRI OCT 4 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR CHEROKEE COUNTY UNTIL 800
PM CDT...

...TORNADO EMERGENCY FOR CHEROKEE...

AT 737 PM CDT...A CONFIRMED LARGE...VIOLENT AND EXTREMELY DANGEROUS
TORNADO WAS LOCATED NEAR QUIMBY...AND MOVING NORTHEAST AT 30 MPH.
MAJOR DAMAGE WAS REPORTED IN QUIMBY...WITH SEVERAL POWER POLES DOWN
WEST OF WASHTA.

THIS IS A PARTICULARLY DANGEROUS SITUATION.

HAZARD...DEADLY TORNADO.

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

IMPACT...YOU COULD BE KILLED IF NOT UNDERGROUND OR IN A TORNADO
SHELTER. COMPLETE DESTRUCTION OF NEIGHBORHOODS...BUSINESSES
AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL BE DEADLY TO
PEOPLE AND ANIMALS.

THE TORNADO WILL BE NEAR...
CHEROKEE AROUND 750 PM CDT.
AURELIA AROUND 755 PM CDT.

[CrazyC83]

TORNADO EMERGENCY!!!

May God bless them all. Potential for a catastrophic blow. They may be unrecognizable tomorrow morning.

[EF-5bigj]

That's the strongest warning so far it may just be a EF-5...

[CrazyC83]

WWUS53 KFSD 050049
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
749 PM CDT FRI OCT 4 2013

IAC035-050100-
/O.CON.KFSD.TO.W.0020.000000T0000Z-131005T0100Z/
CHEROKEE IA-
749 PM CDT FRI OCT 4 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN CHEROKEE
COUNTY UNTIL 800 PM CDT...

...TORNADO EMERGENCY FOR CHEROKEE...

AT 746 PM CDT...A CONFIRMED LARGE...VIOLENT AND EXTREMELY DANGEROUS
TORNADO WAS LOCATED NEAR CHEROKEE...AND MOVING NORTHEAST AT 30 MPH.

THIS IS A PARTICULARLY DANGEROUS SITUATION.

HAZARD...DEADLY TORNADO.

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

IMPACT...YOU COULD BE KILLED IF NOT UNDERGROUND OR IN A TORNADO
SHELTER. COMPLETE DESTRUCTION OF NEIGHBORHOODS...BUSINESSES
AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL BE DEADLY TO
PEOPLE AND ANIMALS.

THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF NORTHEASTERN CHEROKEE
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS TORNADO WITH COMPLETE DEVASTATION
LIKELY. YOU COULD BE KILLED IF NOT UNDERGROUND OR IN A TORNADO
SHELTER. DO NOT DELAY...SEEK SHELTER NOW! IF NO UNDERGROUND SHELTER
IS AVAILABLE SEEK SHELTER IN AN INTERIOR ROOM OF THE LOWEST LEVEL OF
A STRUCTURE...OR IF TIME ALLOWS...CONSIDER MOVING TO AN UNDERGROUND
SHELTER ELSEWHERE. MOBILE HOMES AND OUTBUILDINGS WILL OFFER NO
SHELTER FROM THIS TORNADO.

&&

LAT...LON 4265 9563 4274 9571 4289 9560 4291 9550
4283 9538 4271 9539
TIME...MOT...LOC 0049Z 222DEG 25KT 4274 9551

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CATASTROPHIC
HAIL...1.25IN

$$

CHAPMAN

[EF-5bigj]

Catastrophic damage...

[RL3AO]

Radar signature had weakened a bit the last 15 minutes and the new tornado warning is just radar indicated. Cherokee may have caught a break.

[CrazyC83]

Wayne, NE had extreme damage earlier based on reports. Town blocked off, at least 13 injured.

[EF-5bigj]

I have been reading the same thing about extreme damage.

[CrazyC83]

Report: Cherokee - no significant damage. Tornado either lifted or stayed outside town.

[EF-5bigj]

That's good that tornado is still going...