Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 252, NWS Omaha, NE

September 16, 20164 counties in Iowa; Cass County, Otoe County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Sep 16, 2016, 1:15 AM CDT for 4 counties in Iowa; Cass County, Otoe County, Nebraska. It was in force for 30 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
Sep 16, 2016, 1:15 AM CDT (06:15 UTC)
Expired
Sep 16, 2016, 1:45 AM CDT
In force
30 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Cass County, NE, Otoe County, NE

The radar

The Omaha radar (KOAX), 99 km from the middle of the area, began a volume at 06:18 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 nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.3 hours before the alert went out and 99 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 00:00Z on 2016-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2247 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2016-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
2247 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1154 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
1.5
Supercell composite
17.1

Open this sounding in Storm Lab

The text

As transmitted.

372 
WUUS53 KOAX 160615
SVROAX
IAC071-129-137-145-NEC025-131-160645-
/O.NEW.KOAX.SV.W.0252.160916T0615Z-160916T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
115 AM CDT FRI SEP 16 2016

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONTGOMERY COUNTY IN SOUTHWESTERN IOWA...
  NORTHERN FREMONT COUNTY IN SOUTHWESTERN IOWA...
  NORTHWESTERN PAGE COUNTY IN SOUTHWESTERN IOWA...
  MILLS COUNTY IN SOUTHWESTERN IOWA...
  EASTERN CASS COUNTY IN SOUTHEASTERN NEBRASKA...
  NORTH CENTRAL OTOE COUNTY IN SOUTHEASTERN NEBRASKA...

* UNTIL 145 AM CDT

* AT 115 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR GLENWOOD TO NEAR UNION...MOVING EAST AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  PLATTSMOUTH...RED OAK...GLENWOOD...SHENANDOAH...VILLISCA...
  MALVERN...SIDNEY...ESSEX...STANTON...PACIFIC JUNCTION...MURRAY...
  EMERSON...ELLIOTT...UNION...NEHAWKA...TABOR...THURMAN...RANDOLPH...
  HASTINGS AND GRANT.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 34 IN IOWA BETWEEN MILE MARKERS 1 AND 48.
 HIGHWAY 59 IN IOWA BETWEEN MILE MARKERS 13 AND 37.
 HIGHWAY 75 IN NEBRASKA BETWEEN MILE MARKERS 57 AND 59.
 INTERSTATE 29 BETWEEN MILE MARKERS 17 AND 35.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4072 9512 4077 9601 4105 9589 4116 9506
      4116 9493 4106 9493
TIME...MOT...LOC 0615Z 266DEG 43KT 4104 9577 4080 9596 

HAIL...<.75IN
WIND...60MPH
 
$$

MAYES
1 follow-up statement
077 
WWUS53 KOAX 160628
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
128 AM CDT FRI SEP 16 2016

NEC131-160638-
/O.CAN.KOAX.SV.W.0252.000000T0000Z-160916T0645Z/
OTOE NE-
128 AM CDT FRI SEP 16 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL OTOE COUNTY IS
CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 4072 9512 4076 9583 4106 9579 4116 9506
      4116 9493 4106 9493
TIME...MOT...LOC 0628Z 272DEG 47KT 4101 9557 4077 9576 

$$

IAC071-129-137-145-NEC025-160645-
/O.CON.KOAX.SV.W.0252.000000T0000Z-160916T0645Z/
MONTGOMERY IA-FREMONT IA-PAGE IA-MILLS IA-CASS NE-
128 AM CDT FRI SEP 16 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CDT
FOR MONTGOMERY...NORTHERN FREMONT...NORTHWESTERN PAGE...MILLS AND
EASTERN CASS COUNTIES...

AT 128 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM MALVERN TO 6 MILES WEST OF SIDNEY...MOVING EAST AT 55
MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
RED OAK...GLENWOOD...SHENANDOAH...VILLISCA...MALVERN...SIDNEY...
ESSEX...STANTON...PACIFIC JUNCTION...EMERSON...ELLIOTT...TABOR...
THURMAN...RANDOLPH...HASTINGS...GRANT...YORKTOWN...IMOGENE...
COBURG AND VIKING LAKE STATE PARK.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 34 IN IOWA BETWEEN MILE MARKERS 6 AND 48.
 HIGHWAY 59 IN IOWA BETWEEN MILE MARKERS 13 AND 37.
 INTERSTATE 29 BETWEEN MILE MARKERS 17 AND 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4072 9512 4076 9583 4106 9579 4116 9506
      4116 9493 4106 9493
TIME...MOT...LOC 0628Z 272DEG 47KT 4101 9557 4077 9576 

HAIL...<.75IN
WIND...60MPH
 
$$

MAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 15, 7:16 PM CDTSevere Thunderstorm WarningOAXHarrison, Monona, Shelby44 min
Sep 15, 7:47 PM CDTFlash Flood WarningOAXMonona5 hr
Sep 15, 8:00 PM CDTSpecial Weather StatementOAXHarrison30 min
Sep 15, 8:44 PM CDTFlash Flood WarningOAXHarrison, Monona, Shelby5 hr
Sep 15, 8:49 PM CDTSpecial Weather StatementOAXHarrison, Shelby41 min
Sep 15, 10:09 PM CDTFlash Flood WarningOAXMonona6 hr
Sep 15, 10:52 PM CDTFlash Flood WarningOAXHarrison, Monona6 hr
Sep 16, 12:20 AM CDTFlash Flood WarningOAXHarrison4 hr
Sep 16, 12:51 AM CDTSevere Thunderstorm WarningOAXFremont, Mills24 min
Sep 16, 1:25 AM CDTFlash Flood WarningOAXHarrison, Pottawattamie3 hr
Sep 16, 1:40 AM CDTFlash Flood WarningOAXHarrison, Monona, Pottawattamie, Shelby3 hr
Sep 16, 1:44 AM CDTSevere Thunderstorm WarningOAXFremont, Mills, Montgomery, Page31 min
Sep 16, 2:12 AM CDTSpecial Weather StatementOAXMontgomery, Page48 min
Sep 16, 6:52 AM CDTAreal Flood AdvisoryOAXHarrison, Monona6 hr
Sep 16, 8:45 AM CDTRiver Flood WarningOAXFremont34 hr
Sep 16, 8:45 AM CDTRiver Flood WarningOAXMontgomery52 hr
Sep 16, 8:45 AM CDTRiver Flood WarningOAXFremont66 hr
Sep 16, 9:48 AM CDTRiver Flood WarningOAXMills4 days
Sep 16, 9:48 AM CDTRiver Flood WarningOAXFremont4 days
Sep 15, 7:57 PM CDTFlash Flood WarningOAXCuming, Stanton, Thurston, Wayne5 hr
Sep 15, 8:04 PM CDTSpecial Weather StatementOAXCuming, Stanton26 min
Sep 15, 8:12 PM CDTFlash Flood WarningOAXColfax, Madison, Platte, Stanton8 hr
Sep 15, 8:36 PM CDTSpecial Weather StatementOAXColfax24 min
Sep 15, 8:42 PM CDTSevere Thunderstorm WarningOAXColfax, Cuming, Dodge, Stanton21 min
Sep 15, 9:19 PM CDTSpecial Weather StatementOAXColfax26 min
Sep 15, 9:31 PM CDTSpecial Weather StatementOAXWashington29 min
Sep 15, 9:39 PM CDTFlash Flood WarningOAXButler, Colfax, Platte6 hr
Sep 15, 10:11 PM CDTSpecial Weather StatementOAXColfax, Platte49 min
Sep 15, 10:23 PM CDTRiver Flood WarningOAXDodge41 hr
Sep 15, 10:23 PM CDTRiver Flood WarningOAXCuming37 hr
Sep 15, 10:23 PM CDTRiver Flood WarningOAXDodge41 hr
Sep 15, 10:51 PM CDTSpecial Weather StatementOAXButler, Jefferson, Saline, Seward39 min
Sep 15, 11:07 PM CDTRiver Flood WarningOAXDodge21 hr
Sep 15, 11:15 PM CDTFlash Flood WarningOAXBurt, Colfax, Cuming, Dodge5 hr
Sep 15, 11:19 PM CDTSpecial Weather StatementOAXBurt, Dodge41 min
Sep 15, 11:27 PM CDTSpecial Weather StatementOAXJefferson, Saline, Seward48 min
Sep 15, 11:44 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Saunders46 min
Sep 16, 12:09 AM CDTSpecial Weather StatementOAXGage, Lancaster51 min
Sep 16, 12:36 AM CDTSpecial Weather StatementOAXCass, Sarpy39 min
Sep 16, 12:40 AM CDTSpecial Weather StatementOAXJohnson, Nemaha, Otoe, Pawnee, Richardson50 min
Sep 16, 3:24 AM CDTRiver Flood WarningOAXDodge20 hr
Sep 16, 8:38 AM CDTAreal Flood WarningOAXBurt, Colfax, Cuming, Dodge, Platte, Stanton9 hr
Sep 16, 9:48 AM CDTRiver Flood WarningOAXNemaha4 days
Sep 16, 9:48 AM CDTRiver Flood WarningOAXRichardson4 days

Nearby

Severe Thunderstorm Warnings in Iowa, 2016Severe Thunderstorm Warnings in Nebraska, 2016Every severe thunderstorm warning in 2016

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.