Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 15, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at May 16, 1999, 5:08 PM CDT for Dane County, Wisconsin. It was in force for 62 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 16, 1999, 5:08 PM CDT (22:08 UTC)
- Expired
- May 16, 1999, 6:10 PM CDT
- In force
- 62 min
- Issued by
- NWS Milwaukee, WI
- Area
- Whole counties
County Dane County, WI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 16, 5:12 PM CDT | Thunderstorm Wind | Madison, WI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 16, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 16, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 184 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
- 266 J/kg
- Mixed-layer CIN
- -240 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
In the hours before
Special weather statement, May 16, 11:13 AM CDT, 5 hours 55 minutes before
WIZ046-047-051-052-056>060-062>072-162300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1113 AM CDT SUN MAY 16 1999 ...SLIGHT RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT... ...FOR SOUTH CENTRAL AND SOUTHEAST WISCONSIN... THREAT... LARGE HAIL AND DAMAGING WINDS. DISCUSSION... A SOUTHERLY FLOW OF MOIST AND MORE UNSTABLE AIR IS WORKING NORTH INTO SOUTHERN WISCONSIN THIS AFTERNOON. AN UPPER AIR DISTURBANCE AND STRENGTHENING LOW LEVEL JET STREAM ARE EXPECTED TO INTERACT WITH THE INSTABILTY...TO PRODUCE PERIODS OF THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT. SOME ISOLATED STORMS MAY BECOME SEVERE. SPOTTER ACTIVATION... STORM SPOTTER GROUPS MAY NEED TO BE ACTIVATED THIS AFTERNOON INTO TONIGHT.
Special weather statement, May 16, 11:13 AM CDT, 5 hours 55 minutes before
WIZ046-047-051-052-056>060-062>072-162300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1113 AM CDT SUN MAY 16 1999 ...SLIGHT RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT... ...FOR SOUTH CENTRAL AND SOUTHEAST WISCONSIN... THREAT... LARGE HAIL AND DAMAGING WINDS. DISCUSSION... A SOUTHERLY FLOW OF MOIST AND MORE UNSTABLE AIR IS WORKING NORTH INTO SOUTHERN WISCONSIN THIS AFTERNOON. AN UPPER AIR DISTURBANCE AND STRENGTHENING LOW LEVEL JET STREAM ARE EXPECTED TO INTERACT WITH THE INSTABILTY...TO PRODUCE PERIODS OF THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT. SOME ISOLATED STORMS MAY BECOME SEVERE. SPOTTER ACTIVATION... STORM SPOTTER GROUPS MAY NEED TO BE ACTIVATED THIS AFTERNOON INTO TONIGHT.
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 3:19 PM CDT | Severe Thunderstorm Warning | MKX | Iowa | 56 min |
| May 16, 3:55 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 60 min |
| May 16, 4:15 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa | 60 min |
| May 16, 5:33 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 57 min |
| May 16, 6:34 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Walworth | 61 min |
| May 16, 6:56 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee | 64 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.