Alert archive / Michigan / Flash Flood Warnings in 1999

Flash Flood Warning 8, NWS Marquette, MI

July 31, 1999Schoolcraft County, Michigan

NWS Marquette, MI issued this flash flood warning at Jul 31, 1999, 12:16 AM EDT for Schoolcraft County, Michigan. It was in force for 3 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
Jul 31, 1999, 12:16 AM EDT (04:16 UTC)
Expired
Jul 31, 1999, 3:15 AM EDT
In force
3 hr
Issued by
NWS Marquette, MI
Area
Whole counties

County Schoolcraft County, MI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.3 hours before the alert went out and 230 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, Green Bay/Straub, WI at 00:00Z on 1999-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7703 joules per kilogram.LCLEL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 1999-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
7703 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1183 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
1.1
Supercell composite
7.4

Open this sounding in Storm Lab

The text

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

The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 30, 8:21 PM EDTSevere Thunderstorm WarningMQTGogebic64 min
Jul 30, 8:32 PM EDTSevere Thunderstorm WarningMQTGogebic, Ontonagon63 min
Jul 30, 9:33 PM EDTSevere Thunderstorm WarningMQTOntonagon47 min
Jul 30, 9:41 PM EDTSevere Thunderstorm WarningMQTGogebic, Iron59 min
Jul 30, 10:01 PM EDTSevere Thunderstorm WarningMQTHoughton29 min
Jul 30, 10:12 PM EDTSevere Thunderstorm WarningMQTBaraga, Marquette58 min
Jul 30, 10:29 PM EDTSevere Thunderstorm WarningMQTDickinson46 min
Jul 30, 10:49 PM EDTSevere Thunderstorm WarningMQTMarquette61 min
Jul 30, 11:02 PM EDTSevere Thunderstorm WarningMQTAlger, Delta, Schoolcraft63 min
Jul 30, 11:11 PM EDTSevere Thunderstorm WarningMQTMenominee44 min
Jul 30, 11:30 PM EDTSevere Thunderstorm WarningMQTAlger, Schoolcraft60 min
Jul 30, 11:50 PM EDTSevere Thunderstorm WarningMQTDelta55 min
Jul 31, 12:02 AM EDTSevere Thunderstorm WarningMQTMenominee48 min
Jul 31, 12:09 AM EDTSevere Thunderstorm WarningMQTSchoolcraft61 min
Jul 31, 1:20 AM EDTSevere Thunderstorm WarningMQTLuce35 min

Nearby

Flash Flood Warnings in Michigan, 1999Every flash flood warning in 1999

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.