Alert archive / Michigan / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 64, NWS Gaylord, MI

October 13, 1999Wexford County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Oct 13, 1999, 2:02 AM EDT for Wexford County, Michigan. It was in force for 48 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: Oct 13, 1999, 2:02 AM EDT (06:02 UTC)
Expired: Oct 13, 1999, 2:50 AM EDT
In force: 48 min
Issued by: NWS Gaylord, MI
Area: Whole counties

County Wexford County, MI

The radar

The NCL Michigan radar (KAPX), 93 km from the middle of the area, began a volume at 06:01 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, 6.0 hours before the alert went out and 201 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: 105 J/kg
Mixed-layer CIN: -313 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

975 
WUUS1 KAPN 130604 RRA
SVRAPN
MIC165-130650-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE GAYLORD MI
202 AM EDT WED OCT 13 1999

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEXFORD COUNTY IN NORTHWESTERN LOWER MICHIGAN

* UNTIL 250 AM EDT

* AT 202 AM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES WEST OF MESICK OR 7 MILES WEST OF
  SHERMAN... MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORMS WILL REACH...
  SHERMAN BY 211 AM EDT
  BUCKLEY BY 217 AM EDT


DAMAGING WINDS...LARGE HAIL...AND FREQUENT CLOUD TO GROUND
LIGHTNING CAN RESULT FROM SEVERE THUNDERSTORMS. PERSONS IN AND NEAR
THESE AREAS SHOULD REMAIN INDOORS AWAY FROM WINDOWS UNTIL THE STORM
HAS PASSED.

KEITH

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 Oct 13, 12:40 AM EDT, 1 hour 22 minutes earlier.

Area forecast discussion, Oct 13, 12:40 AM EDT, 1 hour 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GAYLORD MI
1240 AM EDT WED OCT 13 1999

LATEST REGIONAL LDS SHOWING LIGHTNING STRIKES OVER PORTIONS OF
NORTHWEST LOWER MICHIGAN EXTENDING INTO CENTRAL LAKE MICHIGAN
AND WISCONSIN. ALSO THE LATEST TVC SURFACE OBSERVATION REPORTED
THUNDER.

THE RUC IS SHOWING A NARROW BAND OF HIGH 850 DEW PT AIR (AROUND 7C)
AND INCREASED INSTABILITY... MOVING INTO NORTHWEST LOWER MICHIGAN
GENERALLY BETWEEN PETOSKEY AND MANISTEE. THE SURFACE FRONT IS
CURRENTLY MOVING OVER NORTHWEST LOWER...THEREFORE WILL UPDATE NORTHWEST
LOWER FOR LIKELY SHOWERS AND A CHANCE OF THUNDERSTORMS.

.APX...NONE.

SWR

In the hours before

Local storm report, Oct 12, 9:37 PM EDT, 4 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION TO ISSUANCE TIME...
NATIONAL WEATHER SERVICE GAYLORD MI
621 PM EDT TUE OCT 12 1999

TIME(EDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0618 PM    CATHRO                    MI    .75 INCH HAIL
10/12/99   ALPENA                          SPOTTER REPORT OF DIME
                                           SIZED HAIL ON NORTH END
                                           OF TOWN AT 500 PM EDT.

0618 PM    7 NW ALPENA               MI    .75 INCH HAIL
10/12/99   ALPENA                          SPOTTER REPORT OF DIME
                                           SIZED HAIL NEAR CATHRO
                                           AT 508 PM EDT.

0618 PM    CATHRO                    MI    1 INCH HAIL
10/12/99   ALPENA                          SPOTTER REPORTED NICKEL
                                           TO QUARTER SIZED HAIL

                   BETWEEN 507 AND 510 PM
                                           EDT OVER CATHRO.

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 1:30 AM EDT	Severe Thunderstorm Warning	APX	Manistee	60 min
Oct 13, 1:38 AM EDT	Severe Thunderstorm Warning	APX	Benzie	62 min
Oct 13, 2:22 AM EDT	Severe Thunderstorm Warning	APX	Missaukee, Roscommon	63 min
Oct 13, 2:35 AM EDT	Severe Thunderstorm Warning	APX	Manistee	50 min
Oct 13, 4:21 AM EDT	Severe Thunderstorm Warning	APX	Missaukee	49 min

Nearby

Severe Thunderstorm Warnings in Michigan, 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.