Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 166, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 27, 1990, 12:35 PM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 55 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 27, 1990, 12:35 PM CDT (17:35 UTC)
- Expired
- May 27, 1990, 1:30 PM CDT
- In force
- 55 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Bossier Parish, LA, Caddo Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 12:50 PM CDT | Thunderstorm Wind 0 | Caddo, LA |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Longview/Gregg, TX (KGGG), launched 12:00Z, 5.6 hours before the alert went out and 86 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
- 2613 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 561 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 271735 SVRSHV LAC015-017-271830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 1235 PM CDT SUN MAY 27 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 130 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHWEST LOUISIANA ...BOSSIER PARISH...CADDO PARISH AT 1233 PM CDT WEATHER SERVICE RADAR IN SHREVEPORT INDICATED A SEVERE THUNDERSTORMS OVER WESTERN CADDO PARISH JUST NORTHWEST OF SHREVEPORT MOVING TO THE SOUTHEAST AT 30 MPH. THIS STORM HAD INCREASED IN THE LAST HOUR. WINDS TO NEAR 60 MPH POSSIBLE WITH THIS STORM. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 27, 6:48 AM CDT, 5 hours 47 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-271300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 645 AM CDT SUN MAY 27 1990 ...SEVERE THUNDERSTORM WATCHES REMAINED IN EFFECT FOR PARTS OF SOUTH ARKANSAS AND NORTH LOUISIANA..BUT THE WATCH FOR NORTHEAST TEXAS HAS BEEN CANCELLED... AT 640 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A 60 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM NEAR MANSFIELD LOUISIANA ACROSS MINDEN LOUISIANA AND EL DORADO ARKANSAS TO NEAR SHERIDAN ARKANSAS. MOVEMENT WAS EAST SOUTHEAST NEAR 35 MILES AN HOUR. WITHIN THE AREA HEAVY RAINS..PEA SIZE HAIL..GUSTY WINDS OF 35 TO 45 MPH AND FREQUENT LIGHTNING WERE NOTED FROM EAST OF HOMER LOUISIANA TO SOUTHWEST OF ELDORADO ARKANSAS. . IN THE WAKE OF THIS SYSTEM...SHOWERS AND THUNDERSTORMS WERE REDEVELOPING IN A 30 MILE WIDE AREA FROM NEAR ANTOINE ARKANSAS ACROSS LAKE GREESON AND SMITHVILLE OKLAHOMA TO NEAR MCALESTER OKLAHOMA. WITHIN THIS AREA A THUNDERSTORM THAT WAS PRODUCING GUSTY WINDS...HEAVY RAINS AND FREQUENT LIGHTNING WAS NOTED SOUTH OF SMITHVILLE OKLAHOMA. MOVEMENT WAS EAST SOUTHEAST NEAR 35 MILES AN HOUR. LOW AREA FLOODING MAY DEVELOP IN THE AREAS THAT RECEIVED ONE TO TWO INCH TOTALS DURING THE WEE HOURS AND THAT THUNDERSTORMS ONCE AGAIN AFFECT THIS MORNING. ANOTHER AREA ABOUT 50 MILES WIDE OF SHOWERS AND THUNDERSHOWERS WAS WAS NOTED FROM NEAR GEORGETOWN LOUISIANA ACROSS BASTROP LOUISIANA TO NEAR LAKE VILLAGE ARKANSAS. MOVEMENT WAS EAST NEAR 20 MILES AN HOUR. ALSO ISOLATED SHOWERS LINGERED EAST OF LUFKIN TEXAS. ALONG WITH THE THREAT FOR HIGH WINDS AND HAIL...HEAVY RAINS ARE LIKELY THROUGHE TONIGHT OVER PARTS OF THE AREA.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 12:50 PM CDT | Severe Thunderstorm Warning | SHV | De Soto | 85 min |
| May 27, 2:00 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Natchitoches, Red River, Sabine, Winn | 90 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm warning in 1990
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.