Alert archive / Iowa / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 53, NWS Omaha, NE

May 19, 2013Fremont County, Montgomery County, Page County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at May 19, 2013, 5:12 PM CDT for Fremont County, Montgomery County, Page County, Iowa. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 19, 2013, 5:12 PM CDT (22:12 UTC)
Expired: May 19, 2013, 6:00 PM CDT
In force: 48 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.75 in
Wind: 70.0 mph

Counties Fremont County, IA, Montgomery County, IA, Page County, IA

The radar

The Omaha radar (KOAX), 104 km from the middle of the area, began a volume at 22:15 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
May 19, 1:47 PM CDT	Tornado Watch	SPC	10 hr
May 19, 2:59 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.2 hours before the alert went out and 104 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: 1125 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at May 19, 3:42 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, May 19, 3:42 PM CDT, 1 hour 30 minutes before

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Hazardous weather outlook, May 19, 4:59 PM CDT, 13 minutes before

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In the hours before

Local storm report, May 19, 4:27 PM CDT, 45 minutes before

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Local storm report, May 19, 4:38 PM CDT, 34 minutes before

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Local storm report, May 19, 4:43 PM CDT, 29 minutes before

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Local storm report, May 19, 4:44 PM CDT, 28 minutes before

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Local storm report, May 19, 5:06 PM CDT, 6 minutes before

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Special weather statement, May 19, 5:06 PM CDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 9:31 PM CDT	Special Weather Statement	OAX	Butler, Seward	29 min
May 18, 10:05 PM CDT	Special Weather Statement	OAX	Butler, Lancaster, Saunders, Seward	25 min
May 18, 10:08 PM CDT	Special Weather Statement	OAX	Antelope, Colfax, Madison, Pierce, Platte, Stanton and 1 more	37 min
May 18, 10:11 PM CDT	Special Weather Statement	OAX	Antelope	49 min
May 18, 10:38 PM CDT	Special Weather Statement	OAX	Knox, Pierce	52 min
May 18, 11:03 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	42 min
May 18, 11:38 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Lancaster, Saline	52 min
May 18, 11:42 PM CDT	Special Weather Statement	OAX	Gage, Johnson, Nemaha, Pawnee, Richardson	33 min
May 18, 11:50 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Nemaha, Pawnee, Richardson	25 min
May 19, 12:15 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Johnson, Lancaster, Nemaha, Otoe, Richardson	45 min
May 19, 12:24 AM CDT	Special Weather Statement	OAX	Douglas, Washington	36 min
May 19, 12:54 AM CDT	Special Weather Statement	OAX	Cass, Sarpy	51 min
May 19, 2:08 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Pawnee	37 min
May 19, 2:43 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe, Pawnee	32 min
May 19, 3:14 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	31 min
May 19, 3:17 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Nemaha, Otoe	28 min
May 19, 3:46 PM CDT	Severe Thunderstorm Warning	OAX	Sarpy	44 min
May 19, 3:48 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee, Richardson	27 min
May 19, 4:05 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	25 min
May 19, 4:14 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Pawnee, Richardson	46 min
May 19, 5:06 PM CDT	Special Weather Statement	OAX	Antelope, Boone, Madison, Pierce, Platte	54 min
May 19, 5:21 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	24 min
May 19, 5:23 PM CDT	Special Weather Statement	OAX	Johnson, Nemaha, Pawnee	67 min
May 19, 6:01 PM CDT	Special Weather Statement	OAX	Platte	44 min
May 19, 6:51 PM CDT	Severe Thunderstorm Warning	OAX	Platte	24 min
May 19, 6:53 PM CDT	Special Weather Statement	OAX	Knox, Madison, Pierce	37 min
May 19, 1:03 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie, Shelby	27 min
May 19, 4:17 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona, Pottawattamie, Shelby	28 min
May 19, 4:25 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	50 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2013 Every severe thunderstorm warning in 2013

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.