Alert archive / North Dakota / Mesoscale Discussions in 2003
Mesoscale Discussion 1821
The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 6:53 PM CDT for 27 counties in North Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2003, 6:53 PM CDT (23:53 UTC)
- Expired
- Jul 13, 2003, 9:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Sheridan County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Walsh County, ND, Wells County, ND
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.9 hours before the alert went out and 81 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
- 2 J/kg
- Mixed-layer CIN
- -624 J/kg
- Mixed-layer LCL
- 1957 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
271 ACUS11 KWNS 132354 SWOMCD SPC MCD 132353 MNZ000-NDZ000-140200- MESOSCALE DISCUSSION 1821 NWS STORM PREDICTION CENTER NORMAN OK 0653 PM CDT SUN JUL 13 2003 AREAS AFFECTED...CENTRAL AND ERN ND CONCERNING...SEVERE THUNDERSTORM WATCH 739... VALID 132353Z - 140200Z RADAR SHOWS ORGANIZED CONVECTIVE CLUSTER OVER CENTRAL ND WITH GUST FRONT WRAPPING AROUND INTO MISO LOW IN ERN MCLEAN COUNTY...INDICATING SURFACE BASED INSTABILITY IN CLOSE PROXIMITY TO UPDRAFT BASE. BACKING SURFACE WINDS OVER ERN ND ARE HELPING TO PRODUCE 0-1 SRH VALUES ON THE ORDER OF 150-200 M2/S2. COMBINATION OF INCREASED LOW LEVEL SHEAR E OF CURRENT CONVECTIVE SYSTEM ALONG WITH WARMER BOUNDARY LAYER DEWPOINT VALUES SUGGEST CONTINUED THREAT OF ISOLATED TORNADOES. TORNADO THREAT WILL DIMINISH RAPIDLY IF GUST FRONT SURGES AND UNDER CUTS UPDRAFT BASE. OTHERWISE...DAMAGING WINDS AND LARGE HAIL WILL CONTINUE TO BE THE MOST COMMON SEVERE WEATHER TYPE OVER THE WW. ..JEWELL.. 07/13/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FGF...BIS... 46410183 48480093 48869721 46319685 46019978
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 3:13 PM CDT | Mesoscale Discussion | SPC | Adams, Dunn, Hettinger, McLean, Mercer, Oliver and 1 more | 2 hr |
| Jul 13, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Barnes, Benson, Bottineau, Burke, Burleigh and 38 more | 6 hr |
Nearby
Mesoscale Discussions in North Dakota, 2003Every mesoscale discussion in 2003
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.