Alert archive / Michigan / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 37, NWS Gaylord, MI

July 23, 1999Arenac County, Iosco County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 23, 1999, 1:41 PM EDT for Arenac County, Iosco County, Michigan. It was in force for 59 min. 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 23, 1999, 1:41 PM EDT (17:41 UTC)
Expired
Jul 23, 1999, 2:40 PM EDT
In force
59 min
Issued by
NWS Gaylord, MI
Area
Whole counties

Counties Arenac County, MI, Iosco County, MI

The radar

The NCL Michigan radar (KAPX), 119 km from the middle of the area, began a volume at 17:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 23, 10:30 AM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 5.7 hours before the alert went out and 162 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, Detroit, MI at 12:00Z on 1999-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 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, Detroit, MI at 12:00Z on 1999-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
28 J/kg
Mixed-layer CIN
-342 J/kg
Mixed-layer LCL
1152 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

What forecasters said that day

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

NWS Gaylord, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 23, 5:37 AM EDT, 8 hours 4 minutes earlier.

Area forecast discussion, Jul 23, 5:37 AM EDT, 8 hours 4 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GAYLORD MI
537 AM EDT FRI JUL 23 1999

NEED QUICK UPDATE TO ACCOUNT FOR AREAS OF DENSE FOG IN NORTHWEST
LOWER. SHOULD BURN OFF PRETTY QUICKLY THIS MORNING.

.APX...NONE.

FARINA

In the hours before

Special weather statement, Jul 23, 10:27 AM EDT, 3 hours 14 minutes before
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Local storm report, Jul 23, 11:25 AM EDT, 2 hours 16 minutes before
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Local storm report, Jul 23, 11:25 AM EDT, 2 hours 16 minutes before
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Special weather statement, Jul 23, 12:37 PM EDT, 1 hour 4 minutes before
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Special weather statement, Jul 23, 12:37 PM EDT, 1 hour 4 minutes before
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Special weather statement, Jul 23, 12:37 PM EDT, 1 hour 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 10:23 AM EDTSevere Thunderstorm WarningAPXManistee62 min
Jul 23, 11:41 AM EDTSevere Thunderstorm WarningAPXWexford59 min
Jul 23, 12:55 PM EDTSevere Thunderstorm WarningAPXRoscommon50 min
Jul 23, 1:08 PM EDTSevere Thunderstorm WarningAPXGladwin, Ogemaw72 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1999Every severe thunderstorm 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; radar from the NEXRAD Level II archive.