Alert archive / Minnesota / Mesoscale Discussions in 2003

Mesoscale Discussion 1581

July 2, 200324 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2003, 1:27 PM CDT for 24 counties in Minnesota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 2, 2003, 1:27 PM CDT (18:27 UTC)
Expired
Jul 2, 2003, 3:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 24 counties

Aitkin County, MN, Becker County, MN, Beltrami County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Mahnomen County, MN, Marshall County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 151 km from the middle of the area, began a volume at 18:29 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 12:00Z, 6.5 hours before the alert went out and 207 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 12:00Z on 2003-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 774 joules per kilogram.LCLLFCEL10008507005003002001001 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, International Fa, MN at 12:00Z on 2003-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.193958Sfc1 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
774 J/kg
Mixed-layer CIN
-221 J/kg
Mixed-layer LCL
740 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 2, 11:00 AM CDTMesoscale DiscussionSPCKittson, Marshall, Norman, Pennington, Polk, Red Lake60 min
Jul 2, 11:20 AM CDTSevere Thunderstorm WatchSPCBecker, Clay, Clearwater, Kittson, Mahnomen, Marshall and 7 more6 hr
Jul 2, 2:40 PM CDTSevere Thunderstorm WatchSPCAitkin, Carlton, Cass, Crow Wing, Hubbard, Itasca and 4 more5 hr
Jul 2, 3:30 PM CDTMesoscale DiscussionSPCBenton, Big Stone, Chippewa, Douglas, Grant, Kandiyohi and 13 more2 hr
Jul 2, 5:14 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Cass, Chisago and 14 more61 min

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.