Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 10, NWS Bismarck, ND

May 21, 1999McKenzie County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at May 21, 1999, 4:04 PM CDT for McKenzie County, North Dakota. It was in force for 61 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
May 21, 1999, 4:04 PM CDT (21:04 UTC)
Expired
May 21, 1999, 5:05 PM CDT
In force
61 min
Issued by
NWS Bismarck, ND
Area
Whole counties

County McKenzie County, ND

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.1 hours before the alert went out and 410 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, Rapid City, SD at 12:00Z on 1999-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Rapid City, SD at 12:00Z on 1999-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -39 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1886 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-39 m²/s²
0-3 km storm-relative helicity
21 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 May 21, 3:40 PM CDT, 24 minutes earlier.

Area forecast discussion, May 21, 3:40 PM CDT, 24 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
340 PM CDT FRI MAY 21 1999

LINE OF TSTMS HAS ENTERED WRN ND. WATCH WAS ISSUED FOR SWRN AND
PARTS OF S CNTRL ND BY SPC ALREADY. HAVE ISSUED ZONES EARLY RATHER
THAN UPDATE OLD PACKAGE.

MODELS IN FAIR AGREEMENT WITH POSITION OF FEATURES. SFC LOW IS IN
WY/SD/SWRN ND/SERN MT AREA AND PROGGED TO APPROACH S CNTRL ND BY
06Z...AND BE NEAR JMS BY 12Z. SVR TSTMS THIS EVE...BUT SUSPECT SVR
LEVELS WL NOT CONTINUE AFT MID IN ND. CHC TSTMS FROM BIS/MOT AND
EAST ON SAT AS LIS BELOW ZERO...AND A VORT MAX MOVES IN FAST FROM
THE WEST. WL KEEP CHC IN JMS SAT EVE AS SYSTEM PROGRESSES EAST.
CLOUDY BUT DRY FOR SAT NIGHT AND SUN. MAY GET WINDIER THAN 10 TO 20
MPH...BUT MAY NOT HAPPEN UNTIL SAT NIGHT. EXTENDED STILL LOOKS DRY
WITH TEMPS IN THE 70S...MAYBE 80S.

.BIS...SVR TSTM WATCH UNTIL 0200Z SW AND S CNTRL
(DIK...BIS...BOWMAN...FT YATES)

VINING

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 4:08 PM CDTSevere Thunderstorm WarningBISBowman37 min
May 21, 6:25 PM CDTSevere Thunderstorm WarningBISBillings35 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.