Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 2, NWS Omaha, NE

March 6, 2017Page County, Iowa

NWS Omaha, NE issued this tornado warning at Mar 6, 2017, 5:59 PM CST for Page County, Iowa. It was in force for 16 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: Mar 6, 2017, 5:59 PM CST (23:59 UTC)
Expired: Mar 6, 2017, 6:15 PM CST
In force: 16 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Page County, IA

The radar

The Omaha radar (KOAX), 138 km from the middle of the area, began a volume at 00:02 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
Mar 6, 1:54 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 12.0 hours before the alert went out and 138 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 437 m²/s²
0-3 km storm-relative helicity: 464 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

279 
WFUS53 KOAX 062359
TOROAX
IAC145-070015-
/O.NEW.KOAX.TO.W.0002.170306T2359Z-170307T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Omaha/Valley Nebraska
559 PM CST MON MAR 6 2017

The National Weather Service in Omaha has issued a

* Tornado Warning for...
  East central Page County in southwestern Iowa...

* Until 615 PM CST
    
* At 558 PM CST, a severe thunderstorm capable of producing a tornado
  was located 5 miles southeast of Clarinda, or 12 miles west of
  Bedford, moving northeast at 55 mph.

  HAZARD...Tornado. 

  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
  east central Page 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 4065 9494 4075 9500 4078 9493 4073 9493
      4073 9491 4069 9491
TIME...MOT...LOC 2358Z 230DEG 49KT 4068 9496 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MEAD

1 follow-up statement

178 
WWUS53 KOAX 070008
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
608 PM CST MON MAR 6 2017

IAC145-070017-
/O.EXP.KOAX.TO.W.0002.000000T0000Z-170307T0015Z/
Page IA-
608 PM CST MON MAR 6 2017

...The TORNADO Warning for EAST CENTRAL PAGE COUNTY WILL EXPIRE AT
615 PM CST...
        
The storm which prompted the warning has exited the warned area. 
Therefore, the warning will be allowed to expire.  However gusty 
winds are still possible with this thunderstorm.

A tornado watch remains in effect until 1000 PM CST for southwestern
Iowa.

LAT...LON 4065 9494 4075 9500 4078 9493 4073 9493
      4073 9491 4069 9491
TIME...MOT...LOC 0007Z 230DEG 49KT 4075 9485 

$$

MEAD

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 6, 2:09 PM CST	Severe Thunderstorm Warning	OAX	Harrison, Monona	36 min
Mar 6, 2:40 PM CST	Severe Thunderstorm Warning	OAX	Monona	35 min
Mar 6, 2:50 PM CST	Special Weather Statement	OAX	Harrison	25 min
Mar 6, 3:20 PM CST	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	25 min
Mar 6, 3:38 PM CST	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	37 min
Mar 6, 3:47 PM CST	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	28 min
Mar 6, 4:02 PM CST	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	28 min
Mar 6, 4:09 PM CST	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Pottawattamie	36 min
Mar 6, 4:32 PM CST	Fire Weather Watch	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	11 hr
Mar 6, 4:32 PM CST	Red Flag Warning	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	25 hr
Mar 6, 4:46 PM CST	Special Weather Statement	OAX	Fremont, Mills	29 min
Mar 6, 4:53 PM CST	Severe Thunderstorm Warning	OAX	Fremont	37 min
Mar 6, 4:56 PM CST	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	34 min
Mar 6, 5:06 PM CST	Severe Thunderstorm Warning	OAX	Fremont, Page	24 min
Mar 6, 5:19 PM CST	Severe Thunderstorm Warning	OAX	Montgomery	26 min
Mar 6, 5:29 PM CST	Severe Thunderstorm Warning	OAX	Fremont, Montgomery, Page	31 min
Mar 6, 5:39 PM CST	Severe Thunderstorm Warning	OAX	Montgomery	21 min
Mar 6, 5:51 PM CST	Tornado Warning	OAX	Page	24 min

Nearby

Tornado Warnings in Iowa, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.