Alert archive / Iowa / Tornado Warnings in 2015

Tornado Warning 23, NWS Des Moines, IA

August 2, 2015Taylor County, Iowa

NWS Des Moines, IA issued this tornado warning at Aug 2, 2015, 8:12 PM CDT for Taylor County, Iowa. It was in force for 33 min. 5 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: Aug 2, 2015, 8:12 PM CDT (01:12 UTC)
Expired: Aug 2, 2015, 8:45 PM CDT
In force: 33 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Taylor County, IA

The radar

The Omaha radar (KOAX), 144 km from the middle of the area, began a volume at 01:13 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

Time	Report	Where	Remark
Aug 2, 8:13 PM CDT	HAIL 1	4 Sw Gravity, IA	EMERGENCY MANAGER REPORT RELAYED VIA AMATEUR RADIO OF QUARTER SIZED HAIL NW OF BEDFORD.
Aug 2, 8:13 PM CDT	HAIL 1.5	4 Sw Gravity, IA	EMERGENCY MANAGER REPORT RELAYED VIA AMATEUR RADIO OF PING PONG BALL SIZED HAIL NW OF BEDFORD.
Aug 2, 8:23 PM CDT	HAIL 1	4 E New Market, IA
Aug 2, 8:26 PM CDT	HAIL 1.75	4 E New Market, IA	HAIL HAS INCREASED IN SIZE FROM PREVIOUS REPORT.
Aug 2, 8:35 PM CDT	FUNNEL CLOUD	3 Se New Market, IA	FUNNEL CLOUD OVERHEAD MOVING SOUTHEAST.

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.

Issued	Product	Office	Lasted
Aug 2, 6:47 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.2 hours before the alert went out and 144 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: 3912 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1375 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 10.0

Open this sounding in Storm Lab

The text

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

593 
WFUS53 KDMX 030112
TORDMX
IAC173-030145-
/O.NEW.KDMX.TO.W.0023.150803T0112Z-150803T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
812 PM CDT SUN AUG 2 2015

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN TAYLOR COUNTY IN SOUTHWESTERN IOWA...

* UNTIL 845 PM CDT
    
* AT 812 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 8 MILES EAST OF CLARINDA...OR 10 MILES
  NORTHWEST OF BEDFORD...MOVING SOUTHEAST AT 25 MPH.

  HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

  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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTHWESTERN TAYLOR COUNTY...INCLUDING THE FOLLOWING LOCATIONS...
  NEW MARKET.

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.

&&

LAT...LON 4058 9491 4072 9492 4082 9492 4082 9481
      4058 9476
TIME...MOT...LOC 0112Z 330DEG 20KT 4076 9487 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

ANGLE

2 follow-up statements

290 
WWUS53 KDMX 030132
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
832 PM CDT SUN AUG 2 2015

IAC173-030145-
/O.CON.KDMX.TO.W.0023.000000T0000Z-150803T0145Z/
TAYLOR IA-
832 PM CDT SUN AUG 2 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
SOUTHWESTERN TAYLOR COUNTY...
    
AT 832 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 6 MILES WEST OF BEDFORD...MOVING SOUTH AT 15 MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTHWESTERN TAYLOR COUNTY.

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.

&&

LAT...LON 4058 9491 4072 9492 4072 9491 4073 9480
      4058 9476
TIME...MOT...LOC 0132Z 352DEG 11KT 4069 9485 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ANGLE

734 
WWUS53 KDMX 030143
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
843 PM CDT SUN AUG 2 2015

IAC173-030151-
/O.EXP.KDMX.TO.W.0023.000000T0000Z-150803T0145Z/
TAYLOR IA-
843 PM CDT SUN AUG 2 2015

...THE TORNADO WARNING FOR SOUTHWESTERN TAYLOR COUNTY WILL EXPIRE AT
845 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER 
APPEARS CAPABLE OF PRODUCING A TORNADO. THEREFORE THE TORNADO 
WARNING WILL BE ALLOWED TO EXPIRE.  QUARTER SIZE HAIL....GUSTY WINDS 
NEAR 60 MPH AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR
SOUTHWESTERN IOWA.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT 
UNTIL 915 PM CDT.

LAT...LON 4058 9491 4072 9492 4072 9491 4073 9480
      4058 9476
TIME...MOT...LOC 0138Z 330DEG 20KT 4069 9485 

$$

ANGLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 7:01 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	44 min
Aug 2, 7:09 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Ringgold, Union	51 min
Aug 2, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Decatur, Lucas, Wayne	41 min
Aug 2, 7:42 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	48 min
Aug 2, 7:56 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	49 min
Aug 2, 8:01 PM CDT	Special Weather Statement	DMX	Poweshiek	29 min
Aug 2, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	46 min
Aug 2, 9:16 PM CDT	Special Weather Statement	DMX	Adams	44 min
Aug 2, 9:57 PM CDT	Special Weather Statement	DMX	Ringgold, Taylor	63 min
Aug 2, 11:14 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	46 min

Nearby

Tornado Warnings in Iowa, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.