Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 22, NWS Grand Forks, ND

June 3, 1999Nelson County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 3, 1999, 9:27 PM CDT for Nelson County, North Dakota. It was in force for 33 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: Jun 3, 1999, 9:27 PM CDT (02:27 UTC)
Expired: Jun 3, 1999, 10:00 PM CDT
In force: 33 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Nelson County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 78 km from the middle of the area, began a volume at 02:27 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
Jun 3, 9:38 PM CDT	Hail 0.75	Kloten, ND

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 3, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.5 hours before the alert went out and 228 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: 59 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 1938 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.0

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 Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 3, 8:40 PM CDT, 47 minutes earlier.

Area forecast discussion, Jun 3, 8:40 PM CDT, 47 minutes before

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The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	35 min
Jun 3, 8:23 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	32 min
Jun 3, 8:46 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	34 min
Jun 3, 8:54 PM CDT	Severe Thunderstorm Warning	FGF	Eddy, Nelson	36 min
Jun 3, 9:20 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	35 min
Jun 3, 9:53 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	32 min
Jun 4, 1:11 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Steele, Traill	29 min
Jun 4, 4:04 AM CDT	Severe Thunderstorm Warning	FGF	Nelson, Walsh	31 min
Jun 4, 4:04 AM CDT	Severe Thunderstorm Warning	FGF	Pembina	31 min
Jun 4, 4:43 AM CDT	Severe Thunderstorm Warning	FGF	Walsh	32 min
Jun 4, 5:14 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	31 min
Jun 4, 6:16 AM CDT	Severe Thunderstorm Warning	FGF	Marshall	34 min
Jun 4, 4:38 PM CDT	Severe Thunderstorm Warning	FGF	Pennington	32 min
Jun 4, 5:04 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater	36 min
Jun 4, 5:21 PM CDT	Severe Thunderstorm Warning	FGF	Polk	34 min
Jun 4, 5:37 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	33 min
Jun 4, 5:55 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	35 min
Jun 4, 6:30 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater, Polk	35 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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; radar from the NEXRAD Level II archive.