Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 43, NWS Bismarck, ND

June 13, 1999Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 13, 1999, 5:34 PM CDT for Sioux County, North Dakota. It was in force for 56 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 13, 1999, 5:34 PM CDT (22:34 UTC)
Expired: Jun 13, 1999, 6:30 PM CDT
In force: 56 min
Issued by: NWS Bismarck, ND
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Sioux County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.6 hours before the alert went out and 78 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: 17 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1277 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 13, 3:55 PM CDT, 1 hour 39 minutes earlier.

Area forecast discussion, Jun 13, 3:55 PM CDT, 1 hour 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
355 PM CDT SUN JUN 13 1999

...DELAYED...AND SHORT...DUE TO SEVERE WEATHER...

UPPER LOW TO NE WILL CONTINUE TO PLAGUE ND NEXT TWO DAYS. H5 COOL
POOL OF -20 DEG C MOVING THROUGH ND NOW CAUSING ISOLATED TSRA...SOME
WITH 3/4 INCH HAIL AND TORNADOES. H5 THERMAL TROF IS THROUGH STATE
FOR MONDAY BUT WITH WEAK VORT AND SOME DAYTIME HEATING WILL EXPECT
STEEP LAPSE RATES AGAIN...INCLUDED SMALL AFTERNOON POPS. ETA ALSO
INDICATED AREA UVV INTO ISN AND SHIFTING SE FOR THE AFTERNOON.
ANOTHER H5 THERMAL TROF FOR TUESDAY AFTERNOON WITH LIFTEDS GOING TO
NEAR ZERO. INCLUDED SMALL POPS TUESDAY AS WELL. EXTENDED BRINGS H5
RIDGE INTO THE WEST AS UPPER LOW FINALLY PULLS EAST.

.BIS...NONE.

JP MARTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 3:08 PM CDT	Tornado Warning	BIS	Oliver	22 min
Jun 13, 3:15 PM CDT	Tornado Warning	BIS	McKenzie	35 min
Jun 13, 3:24 PM CDT	Tornado Warning	BIS	Morton	51 min
Jun 13, 4:04 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	31 min
Jun 13, 4:12 PM CDT	Tornado Warning	BIS	Morton	48 min
Jun 13, 4:44 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	46 min
Jun 13, 5:42 PM CDT	Tornado Warning	BIS	Sioux	33 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; the sounding from the Mesonet's radiosonde archive.