Alert archive / Minnesota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 161, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 25, 1999, 8:41 PM CDT for Kanabec County, Mille Lacs County, Minnesota. It was in force for 49 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 25, 1999, 8:41 PM CDT (01:41 UTC)
- Expired
- Jul 25, 1999, 9:30 PM CDT
- In force
- 49 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Kanabec County, MN, Mille Lacs County, MN
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 25, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.7 hours before the alert went out and 122 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.
- Mixed-layer CAPE
- 2267 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1657 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 6.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMPX 260142 SVRMSP MNC065-095-260230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 841 PM CDT SUN JUL 25 1999 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA KANABEC COUNTY IN EAST CENTRAL MINNESOTA * UNTIL 930 PM CDT * AT 841 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS 4 MILES NORTHWEST OF FORESTON...OR ABOUT 6 MILES WEST OF MILACA...MOVING NORTHEAST AT 40 MPH. * SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE... PEASE OGILVIE MORA MILACA FORESTON BOCK LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.
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 Twin Cities, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 25, 8:00 PM CDT, 41 minutes earlier.
Area forecast discussion, Jul 25, 8:00 PM CDT, 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 800 PM CDT SUN JUL 25 1999 FORECAST CONCERN NEAR TERM...SEVERE THUNDERSTORM POTENTIAL. OUTFLOW FROM NORTHEAST MN COMPLEX MOVING SLOWLY SOUTHWARD MAINLY FAR EASTERN CWA. THIS WILL LIKELY SAG INTO NORTHERN WI CWA. OTHERWISE...APPEARS TO BE WEAK SURFACE CIRCULATION OVER FAR WEST CENTRAL N...AT APEX OF OUTFLOW AND REAL COLD FRONT WHICH WAS MOVING INTO WESTERN MN AS OF 00Z. THIS LIKELY CAUSED FLAIR UP OF CONVECTION IN FAR WEST...WITH STRONG WINDS REPORTED IN STEVENS CO. THIS SHOULD ALL SAG S-SEWRD DURING THE NIGHT. OTHER CONCERN IS WHAT WILL HAPPEN WHEN WESTERN IA VORT MOVES INTO SERN MN. COULD GET HEAVY RAIN WITH THIS MERGING WITH FRONT/OUTFLOW. MAIN THREAT FROM ALL STORMS SHOULD BE FROM STRONG WINDS...WITH MARGINAL SEVERE HAIL...WITH POSSIBLE BRIEF TORNADO IN WEST CENTRAL MN NEAR SURFACE LOW CIRCULATION NEXT COUPLE HOURS. 23Z DPI CAPE INDICATES 3000-5000 J/KG OVER FAR SOUTHERN MN WITH LI'S TO MINUS 11. SHOULD SEE ACTIVITY SAG SOUTHEAST OVER CWA REST OF NIGHT. WILL CLEAN UP EARLIER UPDATE FOR WATCH. .MSP...SEVERE THUNDERSTORM WATCH MUCH OF CENTRAL MN UNTIL MIDNIGHT.
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 7:32 PM CDT | Severe Thunderstorm Warning | MPX | Douglas, Pope | 43 min |
| Jul 25, 7:38 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Morrison, Stearns | 52 min |
| Jul 25, 8:28 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Stearns | 47 min |
| Jul 25, 8:45 PM CDT | Tornado Warning | MPX | Benton | 30 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.