Alert archive / Indiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 41, NWS Wilmington, OH
NWS Wilmington, OH issued this severe thunderstorm warning at May 17, 1999, 7:49 PM EST for Fayette County, Franklin County, Indiana. It was in force for 56 min. 2 reports 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 17, 1999, 7:49 PM EST (00:49 UTC)
- Expired
- May 17, 1999, 8:45 PM EST
- In force
- 56 min
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
Counties Fayette County, IN, Franklin County, IN
The radar
The Indianapolis radar (KIND), 101 km from the middle of the area, began a volume at 00:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 17, 8:04 PM EST | Tornado F0 | Bentonville, IN | A tornado touched down in a rural area toppling several trees. Numerous other trees were down across the county due to thunderstorm winds. |
| May 17, 8:28 PM EST | Thunderstorm Wind 50 | Brookville, IN | Trees were blown down on St. Marys road. |
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 17, 4:30 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.8 hours before the alert went out and 114 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
- 572 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1617 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 111 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.
NWS Wilmington, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at May 17, 2:35 PM EST, 5 hours 14 minutes earlier.
Area forecast discussion, May 17, 2:35 PM EST, 5 hours 14 minutes before
AREA FORECAST DISCUSSION...CORRECTED HEADLINE SECTION NATIONAL WEATHER SERVICE WILMINGTON OH 250 PM EDT MON MAY 17 1999 CONVECTION HAS REMAINED WELL WEST OF THE CWFA THIS AFTN...FOCUSED IN THE VCNTY OF SVRL OUTFLOW BNDRYS AND IN AREA OF FAVORABLE UPPER LVL DYNAMICS. WEAK CAA ALOFT AND INCREASING UPPER LVL DYNAMICS WL ARRIVE TNGT...WITH CONVECTION CONTINUING TO FIRE IN THE VCNTY OF THE OUTFLOW BNDRYS. DO NOT XPCT THE SHORT RANGE GUIDANCE TO HAVE A VERY GD HANDLE ON THE EVOLUTION OF THE CONVECTION TNGT...AND IN GENERAL XPCT A SLIGHTLY FASTER EVOLUTION THAN MODELS INDC. WL HIT POPS A LITTLE HARDER THAN MOS...GENERALLY CATEGORICAL WEST AND NORTH/HIGH CHC-LIKELY EAST AND SOUTH. TEMPS TRICKY AS IN THE ABSENCE OF CONVECTION WUD XPCT READINGS TO REMAIN CLOSE TO 70...BUT WL HEDGE LOWER AS COOLER TEMPS WL ACCOMPANY OUTFLOW AND RAIN. FRONT AND DEEP MSTR MV THRU THE AREA ON TUESDAY...WITH GRADUAL DRYING FROM THE WEST IN THE AFTN. LEBD MACRO AND FCST SNDGS SUGGEST ENUF INSTABILITY FOR THUNDER WITH THE UPPER SYS IN THE AFTN...ESPLY GIVEN SOME BREAKS IN THE CLDS. WWA JUST ISSUED...WL BE ISSUING AFTN ZONES ARND 3 PM. .ILN...SEVERE THUNDERSTORM WATCH UNTIL 01Z NORTH OFn A LINE FROM DARKE TO FRANKLIN COUNTIES IN OHIO. JOHNSTONE
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 8:22 PM EST | Severe Thunderstorm Warning | ILN | Butler, Preble | 63 min |
| May 17, 8:26 PM EST | Severe Thunderstorm Warning | ILN | Darke | 64 min |
| May 17, 8:52 PM EST | Severe Thunderstorm Warning | ILN | Hamilton | 63 min |
| May 17, 8:07 PM EST | Severe Thunderstorm Warning | ILN | Union, Wayne | 63 min |
| May 17, 8:16 PM EST | Tornado Warning | ILN | Wayne | 49 min |
Nearby
Severe Thunderstorm Warnings in Indiana, 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; radar from the NEXRAD Level II archive.