Alert archive / Minnesota / Mesoscale Discussions in 2003

Mesoscale Discussion 2255

August 25, 200310 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2003, 7:04 PM CDT for 10 counties in Minnesota. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Aug 25, 2003, 7:04 PM CDT (00:04 UTC)
Expired
Aug 25, 2003, 8:00 PM CDT
In force
56 min
Issued by
the Storm Prediction Center

Counties Beltrami County, MN, Clearwater County, MN, Itasca County, MN, Kittson County, MN, Koochiching County, MN, Marshall County, MN, Pennington County, MN, Red Lake County, MN, Roseau County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 167 km from the middle of the area, began a volume at 00:08 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

International Fa, MN (KINL), launched 00:00Z, 0.1 hours before the alert went out and 116 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, International Fa, MN at 00:00Z on 2003-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1016 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2003-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.1939587897Sfc1 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
1016 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1579 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

593 
ACUS11 KWNS 260004
SWOMCD
SPC MCD 260004 
MNZ000-260100-

MESOSCALE DISCUSSION 2255
NWS STORM PREDICTION CENTER NORMAN OK
0704 PM CDT MON AUG 25 2003

AREAS AFFECTED...NRN MN

CONCERNING...TORNADO WATCH 885...

VALID 260004Z - 260100Z

...SEVERE THREAT IS INCREASING ACROSS THE BOUNDARY WATERS OF MN.  WW
MAY BE ISSUED DOWNSTREAM SHORTLY..

ISOLATED SUPERCELLS ARE STEADILY MOVING ESEWD ACROSS NERN PORTIONS
OF WW WITH LEADING EDGE OF STRONGEST ACTIVITY EXPECTED TO EXIT WATCH
SHORTLY AFTER 01Z.  STRONG VEERING PROFILES CONTINUE TO SUPPORT
SUPERCELL STRUCTURE AND ISOLATED TORNADOES.  WW MAY BE ISSUED
DOWNSTREAM SHORTLY.

..DARROW.. 08/26/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...DLH...FGF...

46739338 47689628 48939696 48459269 47439168

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 7:38 PM CDTMesoscale DiscussionSPCFillmore, Houston, Mower67 min
Aug 25, 8:05 PM CDTTornado WatchSPCItasca, Koochiching, Saint Louis6 hr
Aug 25, 10:02 PM CDTMesoscale DiscussionSPCItasca, Lake, Saint Louis58 min
Aug 25, 11:10 PM CDTTornado WatchSPCAitkin, Carlton, Kanabec, Mille Lacs, Pine6 hr

Nearby

Mesoscale Discussions in Minnesota, 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; radar from the NEXRAD Level II archive.