Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Hastings, NE

April 12, 2015Polk County, York County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Apr 12, 2015, 5:08 PM CDT for Polk County, York County, Nebraska. It was in force for 37 min. 3 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: Apr 12, 2015, 5:08 PM CDT (22:08 UTC)
Expired: Apr 12, 2015, 5:45 PM CDT
In force: 37 min
Issued by: NWS Hastings, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Polk County, NE, York County, NE

The radar

The Omaha radar (KOAX), 105 km from the middle of the area, began a volume at 22:08 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

Time	Report	Where	Remark
Apr 12, 5:20 PM CDT	HAIL 0.5	1 S Osceola, NE	PEA TO DIME SIZED HAIL ON THE SOUTH SIDE OF TOWN
Apr 12, 5:25 PM CDT	HAIL 0.88	Osceola, NE	PEA TO NICKEL SIZED HAIL LASTED FOR LESS THAN 5 MINUTES WITH 30-40MPH WIND GUSTS.
Apr 12, 5:30 PM CDT	HAIL 0.75	3 E Osceola, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.1 hours before the alert went out and 105 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: 1825 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 230 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

717 
WUUS53 KGID 122208
SVRGID
NEC143-185-122245-
/O.NEW.KGID.SV.W.0021.150412T2208Z-150412T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
508 PM CDT SUN APR 12 2015

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN POLK COUNTY IN EAST CENTRAL NEBRASKA...
  NORTHWESTERN YORK COUNTY IN EAST CENTRAL NEBRASKA...

* UNTIL 545 PM CDT

* AT 507 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BENEDICT...
  OR 9 MILES NORTHWEST OF YORK...MOVING NORTHEAST AT 20 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* LOCATIONS IMPACTED INCLUDE...
  YORK...STROMSBURG...OSCEOLA...BENEDICT...GRESHAM AND THAYER. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4086 9763 4099 9781 4125 9755 4110 9737
      4105 9737
TIME...MOT...LOC 2207Z 219DEG 16KT 4099 9767 

HAIL...1.00IN
WIND...<50MPH
 
$$

ROSSI

2 follow-up statements

524 
WWUS53 KGID 122222
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
522 PM CDT SUN APR 12 2015

NEC185-122232-
/O.CAN.KGID.SV.W.0021.000000T0000Z-150412T2245Z/
YORK NE-
522 PM CDT SUN APR 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN YORK COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4105 9775 4125 9755 4110 9737 4105 9737
TIME...MOT...LOC 2222Z 215DEG 20KT 4107 9760 

$$

NEC143-122245-
/O.CON.KGID.SV.W.0021.000000T0000Z-150412T2245Z/
POLK NE-
522 PM CDT SUN APR 12 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN POLK COUNTY...

AT 522 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR STROMSBURG...
OR 13 MILES NORTH OF YORK...MOVING NORTHEAST AT 25 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

LOCATIONS IMPACTED INCLUDE...
STROMSBURG AND OSCEOLA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4105 9775 4125 9755 4110 9737 4105 9737
TIME...MOT...LOC 2222Z 215DEG 20KT 4107 9760 

HAIL...1.00IN
WIND...<50MPH
 
$$

ROSSI

765 
WWUS53 KGID 122240
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
540 PM CDT SUN APR 12 2015

NEC143-122250-
/O.EXP.KGID.SV.W.0021.000000T0000Z-150412T2245Z/
POLK NE-
540 PM CDT SUN APR 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN POLK COUNTY WILL
EXPIRE AT 545 PM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4105 9775 4125 9755 4110 9737 4105 9737
TIME...MOT...LOC 2237Z 219DEG 16KT 4107 9760 

$$

ROSSI

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 4:23 PM CDT	Special Weather Statement	GID	Valley	37 min
Apr 12, 4:36 PM CDT	Special Weather Statement	GID	Nance	24 min
Apr 12, 4:51 PM CDT	Special Weather Statement	GID	York	24 min
Apr 12, 5:04 PM CDT	Severe Thunderstorm Warning	GID	Nance	26 min
Apr 12, 5:29 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Nance	46 min
Apr 12, 5:33 PM CDT	Severe Thunderstorm Warning	GID	Polk	27 min
Apr 12, 5:57 PM CDT	Special Weather Statement	GID	Nance	48 min
Apr 12, 5:58 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Polk	32 min
Apr 12, 6:16 PM CDT	Special Weather Statement	GID	Webster	44 min
Apr 12, 6:22 PM CDT	Severe Thunderstorm Warning	GID	Webster	23 min
Apr 12, 6:36 PM CDT	Special Weather Statement	GID	Polk	24 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2015 Every severe thunderstorm warning in 2015

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.