Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 63, NWS Grand Forks, ND

June 9, 1999Cavalier County, Towner County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 1999, 12:43 AM CDT for Cavalier County, Towner County, North Dakota. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 9, 1999, 12:43 AM CDT (05:43 UTC)
Expired
Jun 9, 1999, 1:15 AM CDT
In force
32 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Cavalier County, ND, Towner County, ND

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 8, 8:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.7 hours before the alert went out and 258 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, Bismarck Municip, ND at 00:00Z on 1999-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3431 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, Bismarck Municip, ND at 00:00Z on 1999-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.193958Sfc1 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
3431 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
878 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
1.8
Supercell composite
11.0

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 8, 8:32 PM CDT, 4 hours 11 minutes earlier.

Area forecast discussion, Jun 8, 8:32 PM CDT, 4 hours 11 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 11:31 PM CDTSevere Thunderstorm WarningFGFRansom34 min
Jun 9, 12:08 AM CDTSevere Thunderstorm WarningFGFNelson32 min
Jun 9, 12:09 AM CDTSevere Thunderstorm WarningFGFTowner36 min
Jun 9, 12:39 AM CDTSevere Thunderstorm WarningFGFGrand Forks36 min
Jun 9, 2:15 AM CDTSevere Thunderstorm WarningFGFGriggs35 min
Jun 9, 4:15 AM CDTSevere Thunderstorm WarningFGFGrand Forks30 min
Jun 9, 4:32 AM CDTSevere Thunderstorm WarningFGFTraill33 min
Jun 9, 6:39 AM CDTSevere Thunderstorm WarningFGFPembina31 min
Jun 9, 4:48 AM CDTSevere Thunderstorm WarningFGFMarshall32 min
Jun 9, 4:49 AM CDTSevere Thunderstorm WarningFGFPolk36 min
Jun 9, 5:04 AM CDTSevere Thunderstorm WarningFGFKittson36 min
Jun 9, 5:20 AM CDTSevere Thunderstorm WarningFGFMarshall35 min
Jun 9, 5:37 AM CDTSevere Thunderstorm WarningFGFKittson33 min
Jun 9, 5:42 AM CDTSevere Thunderstorm WarningFGFRoseau33 min
Jun 9, 3:03 PM CDTSevere Thunderstorm WarningFGFBecker, Clay32 min
Jun 9, 3:31 PM CDTSevere Thunderstorm WarningFGFMahnomen, Norman29 min
Jun 9, 3:59 PM CDTSevere Thunderstorm WarningFGFMahnomen31 min
Jun 9, 4:05 PM CDTTornado WarningFGFOtter Tail35 min
Jun 9, 4:43 PM CDTSevere Thunderstorm WarningFGFPolk, Red Lake32 min
Jun 9, 4:54 PM CDTSevere Thunderstorm WarningFGFClearwater, Mahnomen36 min
Jun 9, 5:03 PM CDTSevere Thunderstorm WarningFGFOtter Tail32 min
Jun 9, 5:28 PM CDTSevere Thunderstorm WarningFGFBeltrami, Hubbard32 min
Jun 9, 5:33 PM CDTSevere Thunderstorm WarningFGFClearwater32 min
Jun 9, 5:59 PM CDTSevere Thunderstorm WarningFGFBeltrami, Hubbard31 min
Jun 9, 6:29 PM CDTSevere Thunderstorm WarningFGFBeltrami, Hubbard31 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1999Every 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; the sounding from the Mesonet's radiosonde archive.