Alert archive / Missouri / Flash Flood Warnings in 1998
Flash Flood Warning 13, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 29, 1998, 10:31 PM CDT for Boone County, Missouri. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1998, 10:31 PM CDT (03:31 UTC)
- Expired
- Jun 30, 1998, 1:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Boone County, MO
The radar
The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 03:31 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
Springfield, MO (KSGF), launched 00:00Z, 3.5 hours before the alert went out and 267 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
- 1641 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1639 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 300332 FFWSTL MOC019-027-073-300630- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1031 PM CDT MON JUN 29 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WARNING FOR... BOONE COUNTY IN CENTRAL MISSOURI CALLAWAY COUNTY IN CENTRAL MISSOURI GASCONADE COUNTY IN EASTERN MISSOURI * UNTIL 130 AM CDT * AN AREA OF STRONG THUNDERSTORMS EXTEND FROM EASTERN BOONE COUNTY THROUGH NORTHERN CALLAWAY INTO FAR NORTHERN GASCONADE COUNTIES IN CENTRAL MISSOURI. * THESE STORMS HAVE PRODUCE RAINFALL AMOUNTS OF 1 TO 2 INCHES OVER PARTS OF FAR NORTHERN BOONE COUNTY. THE THUNDERSTORM COMPLEX WILL CONTINUE TO MOVE SOUTHEAST AND PRODUCE HEAVY RAINFALL OVER BOONE...CALLAWAY AND GASCONADE COUNTIES. MOTORISTS ARE ADVISED TO AVOID FLOWING WATER ACROSS ROADWAYS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IT IS VERY DIFFICULT AT NnIGHT TO TELL HOW DEEP THE WATER MAY BE. MOTORISTS SHOULD NEVER DRIVE THROUGH WATER OF UNKNOWN DEPTH. RP &
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:17 PM CDT | Tornado Warning | LSX | Knox | 48 min |
| Jun 29, 7:31 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 49 min |
| Jun 29, 7:39 PM CDT | Tornado Warning | LSX | Shelby | 46 min |
| Jun 29, 7:52 PM CDT | Tornado Warning | LSX | Monroe | 33 min |
| Jun 29, 8:06 PM CDT | Tornado Warning | LSX | Audrain | 49 min |
| Jun 29, 8:33 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 47 min |
| Jun 29, 8:42 PM CDT | Tornado Warning | LSX | Montgomery | 48 min |
| Jun 29, 9:08 PM CDT | Tornado Warning | LSX | Warren | 47 min |
| Jun 29, 9:15 PM CDT | Flash Flood Warning | LSX | Montgomery, Warren | 4 hr |
| Jun 29, 9:15 PM CDT | Flash Flood Warning | LSX | Audrain, Monroe, Shelby | 4 hr |
| Jun 29, 10:01 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson | 44 min |
| Jun 29, 10:31 PM CDT | Flash Flood Warning | LSX | Callaway, Gasconade | 3 hr |
Nearby
Flash Flood Warnings in Missouri, 1998Every flash flood warning in 1998
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.