Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 77, NWS Bismarck, ND

July 3, 1999Logan County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 3, 1999, 3:38 AM CDT for Logan County, North Dakota. It was in force for 62 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
Jul 3, 1999, 3:38 AM CDT (08:38 UTC)
Expired
Jul 3, 1999, 4:40 AM CDT
In force
62 min
Issued by
NWS Bismarck, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Logan County, ND

The radar

The Bismarck radar (KBIS), 104 km from the middle of the area, began a volume at 08:37 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 8.6 hours before the alert went out and 192 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, Aberdeen, SD at 00:00Z on 1999-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 235 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, Aberdeen, SD at 00:00Z on 1999-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939587897Sfc1 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
235 J/kg
Mixed-layer CIN
-306 J/kg
Mixed-layer LCL
766 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
280 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 3:16 AM CDTSevere Thunderstorm WarningBISSlope49 min
Jul 3, 3:55 AM CDTSevere Thunderstorm WarningBISHettinger65 min
Jul 3, 4:33 AM CDTSevere Thunderstorm WarningBISGrant42 min
Jul 3, 5:13 AM CDTSevere Thunderstorm WarningBISMorton62 min
Jul 3, 6:08 AM CDTSevere Thunderstorm WarningBISKidder52 min
Jul 3, 6:13 AM CDTSevere Thunderstorm WarningBISMorton62 min
Jul 3, 6:34 AM CDTSevere Thunderstorm WarningBISStutsman56 min
Jul 3, 7:00 AM CDTSevere Thunderstorm WarningBISBurleigh45 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; radar from the NEXRAD Level II archive.