Alert archive / Minnesota / Excessive Heat Warnings in 2010

Excessive Heat Warning 1, NWS Twin Cities, MN

May 24, 2010Hennepin County, Ramsey County, Minnesota

NWS Twin Cities, MN issued this excessive heat warning at May 24, 2010, 3:23 AM CDT for Hennepin County, Ramsey County, Minnesota. It took effect at May 24, 2010, 2:00 PM CDT. It was in force for 7 hr. 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 24, 2010, 3:23 AM CDT (08:23 UTC)
In effect from: May 24, 2010, 2:00 PM CDT
Expired: May 24, 2010, 9:00 PM CDT
In force: 7 hr
Issued by: NWS Twin Cities, MN

Counties Hennepin County, MN, Ramsey County, MN

The radar

The Minneapolis radar (KMPX), 28 km from the middle of the area, began a volume at 08:27 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 nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 8.4 hours before the alert went out and 396 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2491 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this excessive heat warning went out at May 24, 12:02 AM CDT, 3 hours 21 minutes earlier.

Area forecast discussion, May 24, 12:02 AM CDT, 3 hours 21 minutes before

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Hazardous weather outlook, May 23, 8:08 PM CDT, 7 hours 15 minutes before

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In the hours before

Special weather statement, May 23, 9:33 PM CDT, 5 hours 50 minutes before

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The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 23, 8:38 PM CDT	Special Weather Statement	MPX	Mille Lacs	37 min
May 23, 9:33 PM CDT	Special Weather Statement	MPX	Mille Lacs	42 min
May 24, 3:23 AM CDT	Wind Advisory	MPX	Blue Earth, Brown, Chippewa, Faribault, Lac qui Parle, Martin and 8 more	18 hr

Nearby

Excessive Heat Warnings in Minnesota, 2010 Every excessive heat warning in 2010

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.