Alert archive / Minnesota / Mesoscale Discussions in 2012
Mesoscale Discussion 1202
The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2012, 7:27 PM CDT for 24 counties in Minnesota; Pierce County, Polk County, Saint Croix County, Wisconsin. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Jun 17, 2012, 7:27 PM CDT (00:27 UTC)
- Expired
- Jun 17, 2012, 9:00 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 27 counties
Anoka County, MN, Benton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Dakota County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pope County, MN, Ramsey County, MN, Renville County, MN, Scott County, MN, Sherburne County, MN, Stearns County, MN, Swift County, MN, Todd County, MN, Washington County, MN, Wright County, MN, Pierce County, WI, Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 86 km from the middle of the area, began a volume at 00:30 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 84 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1837 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 492 m²/s²
- 0-3 km storm-relative helicity
- 747 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
494
ACUS11 KWNS 180028
SWOMCD
SPC MCD 180027
WIZ000-MNZ000-180200-
MESOSCALE DISCUSSION 1202
NWS STORM PREDICTION CENTER NORMAN OK
0727 PM CDT SUN JUN 17 2012
AREAS AFFECTED...CENTRAL MINNESOTA INTO PARTS OF NORTHWESTERN
WISCONSIN
CONCERNING...TORNADO WATCH 404...
VALID 180027Z - 180200Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 404 CONTINUES.
SUMMARY...A NEW WW LIKELY WILL BE NEEDED EAST OF WW 404 WITHIN THE
NEXT 1 TO 2 HOURS...FOR A CONTINUED RISK OF AT LEAST DAMAGING WIND
GUSTS AND HAIL INTO LATE EVENING.
DISCUSSION...LOWER/MID TROPOSPHERIC WARM ADVECTION CONTINUES TO
SUPPORT THE EVOLUTION OF AN ORGANIZED MESOSCALE SCALE CONVECTIVE
SYSTEM IN THE PRESENCE OF MODERATELY LARGE CAPE AND STRENGTHENING
DEEP LAYER MEAN FLOW AND SHEAR. AS THE SOUTHWESTERLY 850 MB JET
STRENGTHENS TO 50+ KT ACROSS PARTS OF THE MID MISSOURI VALLEY INTO
THE UPPER MISSISSIPPI VALLEY THIS EVENING...AND SURFACE COLD POOLS
ASSOCIATED THE CONVECTION CONSOLIDATE AND DEEPEN...FORWARD
PROPAGATION MAY ACCELERATE...IN AN EASTERLY OR EAST SOUTHEASTERLY
DIRECTION ACROSS CENTRAL MINNESOTA THROUGH 01-03Z. THE 00Z SOUNDING
FROM MINNEAPOLIS SUGGESTS SUFFICIENT DESTABILIZATION WILL OCCUR
ACROSS THE UPPER MISSISSIPPI VALLEY TO MAINTAIN A RISK FOR STRONG
WIND GUSTS AND HAIL ACROSS AREAS NEAR/WEST THROUGH NORTH OF
MINNEAPOLIS-ST. PAUL...INTO PARTS OF NORTHWESTERN WISCONSIN...
BEFORE ACTIVITY WEAKENS LATE THIS EVENING.
..KERR.. 06/18/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DLH...MPX...FGF...ABR...
LAT...LON 45849537 46259514 46219429 45969286 45439224 44929223
44669240 44519309 44599446 44869569 45219627 45469593
45519576 45849537SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 7:20 PM CDT | Mesoscale Discussion | SPC | Kittson, Marshall | 85 min |
| Jun 17, 7:57 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Anoka, Benton, Blue Earth, Brown, Carlton and 31 more | 8 hr |
| Jun 17, 10:55 PM CDT | Mesoscale Discussion | SPC | Carver, Dakota, Dodge, Goodhue, Le Sueur, McLeod and 8 more | 95 min |
| Jun 18, 1:28 AM CDT | Mesoscale Discussion | SPC | Dakota, Dodge, Fillmore, Goodhue, Hennepin, Houston and 7 more | 62 min |
| Jun 18, 11:40 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Buffalo, Calumet, Clark, Door and 27 more | 2 hr |
| Jun 18, 12:24 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Buffalo, Calumet, Clark, Door and 29 more | 8 hr |
| Jun 18, 2:49 PM CDT | Mesoscale Discussion | SPC | Brown, Calumet, Kewaunee, Marinette, Menominee, Oconto and 5 more | 86 min |
| Jun 18, 3:50 PM CDT | Mesoscale Discussion | SPC | Door, Kewaunee | 85 min |
| Jun 18, 6:00 PM CDT | Mesoscale Discussion | SPC | Brown, Calumet, Door, Green Lake, Kewaunee, Manitowoc and 7 more | 60 min |
Nearby
Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in Wisconsin, 2012Every mesoscale discussion in 2012
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.