Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 252, NWS Omaha, NE

July 20, 2003Gage County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 20, 2003, 9:29 PM CDT for Gage County, Nebraska. It was in force for 31 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: Jul 20, 2003, 9:29 PM CDT (02:29 UTC)
Expired: Jul 20, 2003, 10:00 PM CDT
In force: 31 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Gage County, NE

The radar

The Topeka radar (KTWX), 129 km from the middle of the area, began a volume at 02:32 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
Jul 20, 8:50 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.5 hours before the alert went out and 133 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: 4827 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1616 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 28.6

Open this sounding in Storm Lab

The text

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

997 
WUUS53 KOAX 210229
SVROAX
NEC067-210300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA NE
929 PM CDT SUN JUL 20 2003

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GAGE COUNTY IN SOUTHEAST NEBRASKA

* UNTIL 1000 PM CDT

* AT 927 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES EAST OF BLUE SPRINGS...OR ABOUT 13
  MILES SOUTHEAST OF BEATRICE...MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LIBERTY...
  BARNESTON...

LARGE HAIL IS LIKELY WITH THIS STORM. GO TO A SAFE PLACE INSIDE YOUR
HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND GLASS DOORS.

WINDS OF 60 TO 80 MPH ARE POSSIBLE. FOR YOUR PROTECTION...GO TO THE
LOWEST LEVEL OF YOUR HOME OR BUSINESS...AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR
SOUTHWEST IOWA AND SOUTHEASTERN NEBRASKA.

LAT...LON 4022 9647 4020 9671 4000 9666 4000 9646

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 7:49 PM CDT	Severe Thunderstorm Warning	OAX	Burt	26 min
Jul 20, 8:20 PM CDT	Severe Thunderstorm Warning	OAX	Burt	25 min
Jul 20, 8:54 PM CDT	Severe Thunderstorm Warning	OAX	Johnson	36 min
Jul 20, 9:16 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee	44 min
Jul 20, 9:19 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	41 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2003 Every severe thunderstorm warning in 2003

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.