Alert archive / Nebraska / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 101

April 24, 20166 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2016, 2:28 PM CDT for 6 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2016, 2:28 PM CDT (19:28 UTC)
Expired
Apr 24, 2016, 10:00 PM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
65 kt
All 107 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Woodbury County, IA, Jewell County, KS, Mitchell County, KS, Osborne County, KS, Smith County, KS, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Atchison County, MO, Holt County, MO, Nodaway County, MO, Adams County, NE, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE, Bon Homme County, SD, Brookings County, SD, Clay County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Omaha radar (KOAX), 51 km from the middle of the area, began a volume at 19:26 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
90%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 24, 3:56 PM CDTSevere Thunderstorm WarningOAXMonona34 min
Apr 24, 4:04 PM CDTSevere Thunderstorm WarningOAXMonona41 min
Apr 24, 4:06 PM CDTSevere Thunderstorm WarningFSDCherokee, Plymouth, Woodbury39 min
Apr 24, 4:30 PM CDTSevere Thunderstorm WarningOAXMonona30 min
Apr 24, 4:43 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee, Ida, Plymouth, Woodbury47 min
Apr 24, 5:13 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Nuckolls, Webster25 min
Apr 24, 5:22 PM CDTSevere Thunderstorm WarningGIDJewell, Mitchell38 min
Apr 24, 5:27 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee, Clay, O'Brien33 min
Apr 24, 5:33 PM CDTSevere Thunderstorm WarningGIDJewell42 min
Apr 24, 5:52 PM CDTSevere Thunderstorm WarningGIDMitchell, Osborne22 min
Apr 24, 5:55 PM CDTSevere Thunderstorm WarningGIDNuckolls50 min
Apr 24, 6:03 PM CDTTornado WarningGIDNuckolls27 min
Apr 24, 6:04 PM CDTSevere Thunderstorm WarningFSDCherokee, Plymouth, Woodbury24 min
Apr 24, 6:06 PM CDTSevere Thunderstorm WarningGIDJewell39 min
Apr 24, 6:24 PM CDTSevere Thunderstorm WarningGIDFillmore, Thayer21 min
Apr 24, 6:30 PM CDTSevere Thunderstorm WarningGIDNuckolls, Thayer28 min
Apr 24, 6:33 PM CDTSevere Thunderstorm WarningDMXEmmet, Kossuth, Palo Alto27 min
Apr 24, 7:06 PM CDTSevere Thunderstorm WarningOAXSaunders24 min
Apr 24, 7:07 PM CDTSevere Thunderstorm WarningGIDThayer23 min
Apr 24, 7:12 PM CDTSevere Thunderstorm WarningGIDMerrick, Nance24 min
Apr 24, 7:12 PM CDTSevere Thunderstorm WarningOAXLancaster33 min
Apr 24, 7:21 PM CDTSevere Thunderstorm WarningOAXJefferson24 min
Apr 24, 7:25 PM CDTSevere Thunderstorm WarningOAXBurt, Dodge, Douglas, Washington35 min
Apr 24, 7:29 PM CDTSevere Thunderstorm WarningOAXSaunders31 min
Apr 24, 8:45 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson, O'Brien, Osceola18 min
Apr 24, 8:48 PM CDTSevere Thunderstorm WarningOAXFremont, Mills, Montgomery, Page42 min
Apr 24, 9:32 PM CDTSevere Thunderstorm WarningDMXAdair, Adams, Cass, Union36 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.5 hours before the alert went out and 50 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 12:00Z on 2016-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2016-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 440 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1281 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
440 m²/s²
0-3 km storm-relative helicity
498 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

047 
WWUS20 KWNS 241926
SEL1  
SPC WW 241926
IAZ000-KSZ000-MNZ000-MOZ000-NEZ000-SDZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 101
NWS STORM PREDICTION CENTER NORMAN OK
225 PM CDT SUN APR 24 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  WESTERN IOWA
  NORTH CENTRAL KANSAS
  SOUTHWEST MINNESOTA
  FAR NORTHWEST MISSOURI
  EASTERN NEBRASKA
  SOUTHEAST SOUTH DAKOTA

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 225 PM UNTIL
  1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  WIDESPREAD LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL
    EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
    TO 75 MPH POSSIBLE
  A TORNADO OR TWO POSSIBLE

SUMMARY...A BROKEN BAND OR TWO OF STRONG TO SEVERE THUNDERSTORMS
WILL MOVE FROM EASTERN NEBRASKA INTO WESTERN IOWA AND NORTHWEST
MISSOURI LATER TODAY...WITH ADDITIONAL STORMS FORMING IN THE WAKE OF
THESE ACROSS SOUTH-CENTRAL NEBRASKA. OTHER STORMS SHOULD
FORM/STRENGTHEN NORTHWARD FROM NORTHEAST NEBRASKA INTO SOUTHEAST
SOUTH DAKOTA AND SOUTHWEST MINNESOTA. SOME OF THE
ACTIVITY...ESPECIALLY IN NEBRASKA AND WESTERN IOWA...WILL BE CAPABLE
OF LARGE HAIL...DAMAGING WIND...AND POSSIBLE A TORNADO OR TWO
THROUGH EARLY TONIGHT.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTH
SOUTHWEST OF BEATRICE NEBRASKA TO 45 MILES NORTH NORTHWEST OF
WORTHINGTON MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 22040.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 1:31 PM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Carroll, Cass, Cherokee, Clay and 18 more119 min
Apr 24, 6:10 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Dickinson, Emmet and 15 more65 min
Apr 23, 9:28 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Logan, Rawlins, Scott, Sherman and 3 more92 min
Apr 24, 1:50 PM CDTMesoscale DiscussionSPCBarber, Barton, Clay, Cloud, Comanche, Dickinson and 19 more2 hr
Apr 24, 3:04 PM CDTTornado WatchSPCBarber, Barton, Brown, Butler, Chase, Clay and 39 more9 hr
Apr 24, 5:50 PM CDTMesoscale DiscussionSPCBarber, Barton, Brown, Butler, Chase, Chautauqua and 42 more55 min

Nearby

Severe Thunderstorm Watches in Nebraska, 2016Severe Thunderstorm Watches in Iowa, 2016Severe Thunderstorm Watches in South Dakota, 2016Every severe thunderstorm watch 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.