Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 1, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at May 3, 1999, 7:34 PM CDT for Emmons County, North Dakota. It was in force for 41 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 3, 1999, 7:34 PM CDT (00:34 UTC)
- Expired
- May 3, 1999, 8:15 PM CDT
- In force
- 41 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Emmons County, ND
The radar
The Bismarck radar (KBIS), 67 km from the middle of the area, began a volume at 00:33 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 3, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.6 hours before the alert went out and 64 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.
- Mixed-layer CAPE
- 55 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1997 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
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 3, 3:35 PM CDT, 3 hours 59 minutes earlier.
Area forecast discussion, May 3, 3:35 PM CDT, 3 hours 59 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 335 PM CDT MON MAY 3 1999 THE MODELS HAVE BEEN CONSISTENT OVER THE PAST FEW RUNS AND TODAY IS NO EXCEPTION. IN THE SHORT RUN A SHORT WAVE RIDGE HAS CYCLED THROUGH THE TROUGH AND HAS BEEN MOVING THROUGH ND. A SHORT WAVE WILL MOVE THROUGH THE TROUGH AND ACROSS ND TONIGHT. STRONG SUBSIDENCE AND WARM AIR ADVECTION HAVE CLEARED THE SKIES IN CENTRAL AND EASTERN NORTH DAKOTA AND SUPPRESSED CONVECTION. THAT WILL CHANGE THIS EVENING. CURRENT SATELLITE AND LIGHTNING CHARTS INDICATE CONVECTION BEGINING IN SOUTHWEST SOUTH DAKOTA AS THE SHORT WAVE APPROACHES. THE PRECIPITATION WILL ADVECT INTO THE STATE TONIGHT. BY TUESDAY THE UPPER LEVEL TROUGH WILL CONTINUE TO EDG EAST AND THE SURFACE LOW SHOULD MOVE INTO EASTERN ND. CONTINUED STRONG LIFTING OVER THE AREA ALONG WITH COLD AIR ADVECTION AT SURFACE SHOULD CAUSE SCATTERED SHOWERS THROUGH THE DAY. THE TROUGH SHOULD SWING ACROSS THE AREA BY THURSDAY WITH A CONTINUED CHANCE OF PRECIPITATION UNTIL THEN. TEMPS SHOULD TREND LOWER NEXT TWO DAYS AS THICKNESS LOWERS. .BIS...NONE. TSW
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:28 PM CDT | Severe Thunderstorm Warning | BIS | Wells | 47 min |
| May 4, 2:04 PM CDT | Severe Thunderstorm Warning | BIS | Rolette | 41 min |
| May 4, 3:15 PM CDT | Severe Thunderstorm Warning | BIS | Pierce | 30 min |
| May 4, 3:45 PM CDT | Severe Thunderstorm Warning | BIS | Rolette | 45 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.