Alert archive / Minnesota / Flash Flood Warnings in 1991

Flash Flood Warning 7, NWS Twin Cities, MN

July 11, 1991Sherburne County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jul 11, 1991, 11:11 AM CDT for Sherburne County, Minnesota. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued
Jul 11, 1991, 11:11 AM CDT (16:11 UTC)
Expired
Jul 12, 1991, 12:03 AM CDT
In force
13 hr
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Sherburne County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 4.2 hours before the alert went out and 67 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, Minneapolis, MN at 12:00Z on 1991-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 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, Minneapolis, MN at 12:00Z on 1991-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
170 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
758 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Flash Flood Warnings in Minnesota, 1991Every flash flood warning in 1991

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.