Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 46, NWS Hastings, NE

May 16, 1999Sherman County, Valley County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at May 16, 1999, 4:47 AM CDT for Sherman County, Valley County, Nebraska. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 16, 1999, 4:47 AM CDT (09:47 UTC)
Expired: May 16, 1999, 5:30 AM CDT
In force: 43 min
Issued by: NWS Hastings, NE
Area: Whole counties

Counties Sherman County, NE, Valley County, NE

What was reported inside it

Time	Report	Where	Remark
May 16, 5:29 AM CDT	Hail 1.25	North Loup, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.8 hours before the alert went out and 218 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: 107 J/kg
Mixed-layer CIN: -296 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at May 16, 3:20 AM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, May 16, 3:20 AM CDT, 1 hour 27 minutes before

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In the hours before

Local storm report, May 15, 10:59 PM CDT, 5 hours 48 minutes before

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Local storm report, May 15, 11:05 PM CDT, 5 hours 42 minutes before

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Local storm report, May 15, 11:05 PM CDT, 5 hours 42 minutes before

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Local storm report, May 15, 11:08 PM CDT, 5 hours 39 minutes before

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Special weather statement, May 16, 12:21 AM CDT, 4 hours 26 minutes before

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Local storm report, May 16, 3:31 AM CDT, 1 hour 16 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 9:10 PM CDT	Severe Thunderstorm Warning	GID	Webster	35 min
May 15, 9:24 PM CDT	Severe Thunderstorm Warning	GID	Clay, Nuckolls	51 min
May 15, 9:31 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, Nuckolls, Thayer	59 min
May 15, 9:44 PM CDT	Severe Thunderstorm Warning	GID	Webster	46 min
May 15, 10:07 PM CDT	Severe Thunderstorm Warning	GID	York	53 min
May 15, 10:43 PM CDT	Tornado Warning	GID	Polk	47 min
May 16, 5:36 AM CDT	Severe Thunderstorm Warning	GID	Greeley	39 min
May 15, 7:16 PM CDT	Tornado Warning	GID	Rooks	49 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.