Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Omaha, NE

July 9, 20217 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 9, 2021, 11:41 PM CDT for 7 counties in Nebraska. It was in force for 49 min. 4 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
Jul 9, 2021, 11:41 PM CDT (04:41 UTC)
Expired
Jul 10, 2021, 12:30 AM CDT
In force
49 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

Counties Butler County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Platte County, NE, Saunders County, NE, Stanton County, NE

The radar

The Omaha radar (KOAX), 57 km from the middle of the area, began a volume at 04:44 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

TimeReportWhereRemark
Jul 9, 11:44 PM CDTTSTM WND DMGWahoo, NECORRECTS PREVIOUS TSTM WND DMG REPORT FROM WAHOO. 10 INCH TREE BRANCH DOWN.
Jul 9, 11:47 PM CDTTSTM WND DMG1 N Schuyler, NEREPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.
Jul 10, 12:15 AM CDTTSTM WND GST 742 Ne Wahoo, NECORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 NE WAHOO. WAHOO AIRPORT MEASURED A PEAK WIND GUST OF 74 MPH.
Jul 10, 12:15 AM CDTTSTM WND GST 742 Ne Wahoo, NEFREMONT AIRPORT MEASURED A PEAK WIND GUST OF 74 MPH.

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.

IssuedProductOfficeLasted
Jul 9, 8:45 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 9, 9:58 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.7 hours before the alert went out and 57 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 2021-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2603 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2021-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
2603 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
1447 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.6
Supercell composite
8.1

Open this sounding in Storm Lab

The text

As transmitted.

095 
WUUS53 KOAX 100441
SVROAX
NEC023-037-039-053-141-155-167-100530-
/O.NEW.KOAX.SV.W.0099.210710T0441Z-210710T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
1141 PM CDT Fri Jul 9 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cuming County in northeastern Nebraska...
  Colfax County in northeastern Nebraska...
  Southeastern Platte County in northeastern Nebraska...
  Dodge County in east central Nebraska...
  Central Butler County in east central Nebraska...
  Northwestern Saunders County in east central Nebraska...
  Southeastern Stanton County in northeastern Nebraska...

* Until 1230 AM CDT.

* At 1140 PM CDT, severe thunderstorms were located along a line
  extending from near Snyder to 5 miles northwest of Schuyler, moving
  southeast at 45 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Snyder around 1145 PM CDT.
  Scribner around 1150 PM CDT.
  Hooper around 1200 AM CDT.

Other locations in the path of these severe thunderstorms include
Nickerson, Prague, Fremont, Weston and Wahoo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4159 9737 4190 9693 4170 9646 4119 9647
      4120 9737
TIME...MOT...LOC 0440Z 308DEG 40KT 4175 9680 4149 9716 

HAIL...0.75IN
WIND...70MPH
 
$$

Petersen
5 follow-up statements
744 
WWUS53 KOAX 100453
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1153 PM CDT Fri Jul 9 2021

NEC167-100503-
/O.CAN.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Stanton NE-
1153 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN STANTON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
northeastern Nebraska. A Severe Thunderstorm Watch also remains in
effect until 500 AM CDT for northeastern and east central Nebraska.

LAT...LON 4146 9728 4181 9673 4170 9646 4119 9647
      4120 9737
TIME...MOT...LOC 0453Z 308DEG 40KT 4167 9666 4141 9702 

$$

NEC023-037-039-053-141-155-100530-
/O.CON.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Cuming NE-Colfax NE-Platte NE-Dodge NE-Butler NE-Saunders NE-
1153 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR SOUTH CENTRAL CUMING...SOUTHERN COLFAX...EASTERN PLATTE...
DODGE...CENTRAL BUTLER AND NORTHWESTERN SAUNDERS COUNTIES...

At 1153 PM CDT, severe thunderstorms were located along a line
extending from Scribner to near Schuyler, moving southeast at 45 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Hooper around 1200 AM CDT.

Other locations in the path of these severe thunderstorms include
Nickerson, Prague, Fremont, Weston, Wahoo and Mead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4146 9728 4181 9673 4170 9646 4119 9647
      4120 9737
TIME...MOT...LOC 0453Z 308DEG 40KT 4167 9666 4141 9702 

HAIL...0.75IN
WIND...70MPH
 
$$

Petersen
375 
WWUS53 KOAX 100502
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1202 AM CDT Sat Jul 10 2021

NEC037-141-100512-
/O.CAN.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Colfax NE-Platte NE-
1202 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN COLFAX AND EASTERN
PLATTE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
northeastern and east central Nebraska.

LAT...LON 4178 9666 4170 9646 4119 9647 4120 9709
TIME...MOT...LOC 0502Z 308DEG 40KT 4162 9658 4136 9694 

$$

NEC023-039-053-155-100530-
/O.CON.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Cuming NE-Dodge NE-Butler NE-Saunders NE-
1202 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR SOUTHERN CUMING...DODGE...EAST CENTRAL BUTLER AND NORTHWESTERN
SAUNDERS COUNTIES...

At 1202 AM CDT, severe thunderstorms were located along a line
extending from Hooper to 7 miles northwest of Prague, moving
southeast at 45 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Hooper around 1205 AM CDT.
  Nickerson and Prague around 1210 AM CDT.

Other locations in the path of these severe thunderstorms include
Fremont, Weston, Wahoo and Mead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4178 9666 4170 9646 4119 9647 4120 9709
TIME...MOT...LOC 0502Z 308DEG 40KT 4162 9658 4136 9694 

HAIL...0.75IN
WIND...70MPH
 
$$

Petersen
554 
WWUS53 KOAX 100509
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1209 AM CDT Sat Jul 10 2021

NEC023-039-100519-
/O.CAN.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Cuming NE-Butler NE-
1209 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CUMING AND EAST
CENTRAL BUTLER COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
east central Nebraska.

LAT...LON 4161 9670 4170 9646 4119 9647 4120 9691
TIME...MOT...LOC 0509Z 308DEG 40KT 4158 9651 4132 9688 

$$

NEC053-155-100530-
/O.CON.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Dodge NE-Saunders NE-
1209 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR CENTRAL DODGE AND NORTHWESTERN SAUNDERS COUNTIES...

At 1209 AM CDT, severe thunderstorms were located along a line
extending from near Hooper to near Prague, moving southeast at 45
mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Fremont and Nickerson around 1215 AM CDT.

Other locations in the path of these severe thunderstorms include
Wahoo and Mead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4161 9670 4170 9646 4119 9647 4120 9691
TIME...MOT...LOC 0509Z 308DEG 40KT 4158 9651 4132 9688 

HAIL...<.75IN
WIND...70MPH
 
$$

Petersen
013 
WWUS53 KOAX 100519
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1219 AM CDT Sat Jul 10 2021

NEC053-155-100530-
/O.CON.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Dodge NE-Saunders NE-
1219 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR SOUTH CENTRAL DODGE AND NORTH CENTRAL SAUNDERS COUNTIES...

At 1218 AM CDT, severe thunderstorms were located along a line
extending from near Nickerson to 4 miles southeast of Prague, moving
southeast at 45 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
  Wahoo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4157 9664 4157 9646 4119 9647 4120 9677
TIME...MOT...LOC 0518Z 308DEG 40KT 4152 9640 4126 9677 

HAIL...<.75IN
WIND...70MPH
 
$$

Petersen
370 
WWUS53 KOAX 100529
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1229 AM CDT Sat Jul 10 2021

NEC053-155-100539-
/O.EXP.KOAX.SV.W.0099.000000T0000Z-210710T0530Z/
Dodge NE-Saunders NE-
1229 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL DODGE AND NORTH
CENTRAL SAUNDERS COUNTIES WILL EXPIRE AT 1230 AM CDT...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
east central Nebraska.

LAT...LON 4157 9664 4157 9646 4119 9647 4120 9677
TIME...MOT...LOC 0529Z 308DEG 40KT 4145 9628 4119 9665 

$$

Petersen

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 9:30 PM CDTSevere Thunderstorm WarningOAXAntelope, Knox, Pierce45 min
Jul 9, 9:50 PM CDTSpecial Weather StatementOAXAntelope, Boone10 min
Jul 9, 10:12 PM CDTSevere Thunderstorm WarningOAXAntelope, Cedar, Knox, Madison, Pierce, Stanton and 1 more48 min
Jul 9, 10:15 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Platte45 min
Jul 9, 10:52 PM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Thurston38 min
Jul 9, 10:56 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Dodge, Platte, Saunders64 min
Jul 9, 11:00 PM CDTSevere Thunderstorm WarningOAXCuming, Madison, Pierce, Stanton, Wayne45 min
Jul 9, 11:19 PM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Dodge41 min
Jul 9, 11:26 PM CDTSevere Thunderstorm WarningOAXButler, Gage, Lancaster, Saline, Saunders, Seward64 min
Jul 9, 11:38 PM CDTSevere Thunderstorm WarningOAXBurt, Dodge, Douglas, Saunders, Washington52 min
Jul 9, 11:46 PM CDTSevere Thunderstorm WarningOAXJefferson44 min
Jul 9, 11:55 PM CDTSevere Thunderstorm WarningOAXCass, Douglas, Gage, Johnson, Lancaster, Otoe and 2 more65 min
Jul 10, 12:11 AM CDTSevere Thunderstorm WarningOAXGage, Johnson, Pawnee49 min
Jul 10, 12:26 AM CDTSevere Thunderstorm WarningOAXDodge, Douglas, Saunders, Washington19 min
Jul 10, 12:40 AM CDTSevere Thunderstorm WarningOAXOtoe50 min
Jul 10, 12:42 AM CDTSevere Thunderstorm WarningOAXDodge, Douglas, Saunders, Washington18 min
Jul 10, 12:44 AM CDTSevere Thunderstorm WarningOAXCass, Gage, Johnson, Nemaha, Otoe, Pawnee and 1 more61 min
Jul 10, 1:31 PM CDTSpecial Weather StatementOAXDodge, Douglas, Sarpy, Saunders, Washington74 min
Jul 10, 1:56 PM CDTSevere Thunderstorm WarningOAXDodge, Douglas, Sarpy, Saunders, Washington64 min
Jul 10, 4:18 PM CDTSpecial Weather StatementOAXPawnee, Richardson27 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021Every severe thunderstorm warning in 2021

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.