Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 53, NWS Green Bay, WI

July 5, 1999Winnebago County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 5, 1999, 11:09 PM CDT for Winnebago County, Wisconsin. It was in force for 51 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 5, 1999, 11:09 PM CDT (04:09 UTC)
Expired: Jul 6, 1999, 12:00 AM CDT
In force: 51 min
Issued by: NWS Green Bay, WI
Area: Whole counties

County Winnebago County, WI

The radar

The Green Bay radar (KGRB), 64 km from the middle of the area, began a volume at 04:11 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.2 hours before the alert went out and 63 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: 4282 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 263 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 Green Bay, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 5, 4:00 PM CDT, 7 hours 9 minutes earlier.

Area forecast discussion, Jul 5, 4:00 PM CDT, 7 hours 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
400 PM CDT MON JUL 5 1999

FORECAST CONCERNS SURROUND POSSIBLE SEVERE WEATHER THIS EVENING...NIGHT.

COLD FRONT CURRENTLY LIES OVER CENTRAL MN. LINE OF STORMS FORMING AHEAD
OF FRONT OVER EASTERN MN...MOVING TOWARDS NW WISCONSIN. MOIST...HUMID
AND UNSTABLE AIR AHEAD OF FRONT. CURRENT ANALYSIS SHOWS LIS -8 TO -9
WITH CAPES IN THE 3000 TO 4000 J/KG RANGE OVER FORECAST AREA.  WATCH
ISSUED FOR EXTREME NORTHWEST WI...WITH MORE LIKELY COME.

NOT MUCH TIME DELVING INTO MODELS WITH EARLIER SEVERE WEATHER. MODELS
CONSISTENT WITH CHANGE IN PATTERN...WITH SERIES OF WAVES MOVING OUT OF
THE PAC NW...BREAKING DOWN RIDGE OVER THE EAST. RIDGE TO REBUILD OVER
THE WEST WITH COOLER/DRIER NORTHWEST FOR WISCONSIN FOR NEXT FEW DAYS.

FRONT IS EXPECTED TO MOVE THROUGH THE FORECAST AREA TONIGHT...MODELS ARE
A BIT SLOWER WITH THIS RUN. EXPECT PRECIPITATION TO BE AHEAD OF FRONT
...SO WILL KEEP PCPN OUT OF FORECAST FOR TUESDAY MORNING.  MODEL X-
SECTIONS SHOW GOOD SUBSIDENCE ON TUE...SO MOSTLY SUNNY LOOKS GOOD WITH
BREEZY CONDITIONS AS WINDS BELOW 3000 FEET STILL IN THE 30 KT RANGE.

MADE SLIGHT CHANGE TO EXTENDED SPEEDING UP NEXT SYSTEM FOR THU NIGHT AS
FLOW REMAINS PROGRESSIVE.

COORD W MKE.

.GRB...NONE

TE
WWW.CRH.NOAA.GOV/GRB

In the hours before

Local storm report, Jul 5, 8:56 PM CDT, 2 hours 13 minutes before

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Local storm report, Jul 5, 8:56 PM CDT, 2 hours 13 minutes before

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Special weather statement, Jul 5, 10:05 PM CDT, 1 hour 4 minutes before

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Special weather statement, Jul 5, 10:05 PM CDT, 1 hour 4 minutes before

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Special weather statement, Jul 5, 10:30 PM CDT, 39 minutes before

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Special weather statement, Jul 5, 10:30 PM CDT, 39 minutes before

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The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 5, 7:19 PM CDT	Severe Thunderstorm Warning	GRB	Vilas	46 min
Jul 5, 7:52 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	48 min
Jul 5, 8:12 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Oneida	48 min
Jul 5, 8:29 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Shawano	46 min
Jul 5, 8:29 PM CDT	Severe Thunderstorm Warning	GRB	Menominee	46 min
Jul 5, 8:33 PM CDT	Severe Thunderstorm Warning	GRB	Forest	47 min
Jul 5, 8:52 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Marinette	63 min
Jul 5, 8:52 PM CDT	Severe Thunderstorm Warning	GRB	Oconto	63 min
Jul 5, 9:14 PM CDT	Severe Thunderstorm Warning	GRB	Shawano	31 min
Jul 5, 9:19 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Outagamie	51 min
Jul 5, 9:29 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie	46 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1999 Every 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.